Hurricane Sergio (2018)
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Hurricane Sergio was a powerful and long-lived
tropical cyclone A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depend ...
that affected the Baja California Peninsula as a tropical storm and caused significant flooding throughout
southern Texas South Texas is a region of the U.S. state of Texas that lies roughly south of—and includes—San Antonio. The southern and western boundary is the Rio Grande, and to the east it is the Gulf of Mexico. The population of this region is about 4.96 ...
in early October 2018. Sergio became the eighth in the East Pacific for
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, breaking the old record of seven set in
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. It was the twentieth
named storm Tropical cyclones and subtropical cyclones are named by various warning centers to simplify communication between forecasters and the general public regarding forecasts, watches and warnings. The names are intended to reduce confusion in the ...
, eleventh
hurricane A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depend ...
, and ninth major hurricane of the season. The storm originated from a disturbance located over northwestern South America on September 24. The
National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 3 ...
monitored the disturbance for several days as the system organized into a tropical storm on September 29. Sergio gradually strengthened for the next couple of days as it traveled west-southwestward, becoming a hurricane on October 2. The storm then turned towards the northwest as it underwent
rapid intensification In meteorology, rapid intensification is a situation where a tropical cyclone intensifies dramatically in a short period of time. The United States National Hurricane Center defines rapid intensification as an increase in the maximum sustained w ...
and an
eyewall replacement cycle In meteorology, eyewall replacement cycles, also called concentric eyewall cycles, naturally occur in intense tropical cyclones, generally with winds greater than , or major hurricanes ( Category 3 or above). When tropical cyclones reach this int ...
, before peaking as a Category 4 hurricane on October 4, with
maximum sustained wind The maximum sustained wind associated with a tropical cyclone is a common indicator of the intensity of the storm. Within a mature tropical cyclone, it is found within the eyewall at a distance defined as the radius of maximum wind, or RMW. Unl ...
s of . The hurricane maintained peak intensity for 12 hours before undergoing a second eyewall replacement and turning towards the southwest. The system then began another period of intensification, achieving a secondary peak with winds of on October 6. The next day, Sergio began a third eyewall replacement cycle, falling below major hurricane strength. At the same time, the system unexpectedly assumed some annular characteristics. Over the next few days, the cyclone curved from the southwest to the northeast, weakening into a tropical storm on October 9. Sergio made
landfall Landfall is the event of a storm moving over land after being over water. More broadly, and in relation to human travel, it refers to 'the first land that is reached or seen at the end of a journey across the sea or through the air, or the fact ...
as a tropical storm on October 12 on the Baja California Peninsula, and later in northwestern Mexico as a tropical depression before dissipating early on October 13. Sergio's approach warranted the issuance of tropical storm watches and warnings along the western and eastern coasts of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
from October 10–11. The cyclone made landfall in western
Baja California Sur Baja California Sur (; 'South Lower California'), officially the Free and Sovereign State of Baja California Sur ( es, Estado Libre y Soberano de Baja California Sur), is the least populated state and the 31st admitted state of the 32 federal ent ...
and
Sonora Sonora (), officially Estado Libre y Soberano de Sonora ( en, Free and Sovereign State of Sonora), is one of the 31 states which, along with Mexico City, comprise the Administrative divisions of Mexico, Federal Entities of Mexico. The state is d ...
on October 13 as a tropical storm and tropical depression, respectively, causing over
US$ The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official ...
2 million in damage, over a thousand school closures, and a few hundred evacuations due to severe flooding. Sergio's remnants brought heavy rainfall to
Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...
, resulting in the closure of its
state fair A state fair is an annual competitive and recreational gathering of a U.S. state's population, usually held in late summer or early fall. It is a larger version of a county fair, often including only exhibits or competitors that have won in th ...
. Multiple tornadoes also spawned in Texas as a result of the increased moisture. About US$548,000 in damage occurred throughout both states. No injuries or deaths were reported in association with the hurricane or its remnants.


Meteorological history

The origins of Hurricane Sergio can be traced to a weather system that was located over northwestern South America on September 24. Although uncertain, there is a possibility that Sergio arose from a
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
that departed from the west coast of Africa on September 13. The
National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 3 ...
(NHC) forecast on September 25 that a
low-pressure area In meteorology, a low-pressure area, low area or low is a region where the atmospheric pressure is lower than that of surrounding locations. Low-pressure areas are commonly associated with inclement weather (such as cloudy, windy, with possible ...
would form a few hundred miles south of the
Gulf of Tehuantepec Gulf of Tehuantepec () is a large body of water on the Pacific coast of the Isthmus of Tehuantepec, southeastern Mexico, at . Many (but not all) Pacific hurricanes form in or near this body of water. A strong, gale-force wind called the Tehuan ...
in about two days. A low-pressure system materialized a few hundred miles south-southeast of Mexico's southern coast around 12:00 UTC on September 26. The NHC continued to track the disturbance for a few more days as the system traveled west-northwest, before it developed into Tropical Storm Sergio on September 29 at 12:00UTC, while approximately south of
Zihuatanejo, Mexico Zihuatanejo (), or Ixtapa-Zihuatanejo, is the fourth-largest city in the Mexican state of Guerrero. It was known by 18th century English mariners as Chequetan or Seguataneo. Politically the city belongs to the municipalities of Mexico, municipali ...
. Unlike most other
tropical cyclones A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depend ...
, Sergio did not possess an inner wind core. Instead, the
maximum sustained wind The maximum sustained wind associated with a tropical cyclone is a common indicator of the intensity of the storm. Within a mature tropical cyclone, it is found within the eyewall at a distance defined as the radius of maximum wind, or RMW. Unl ...
s were located in a
rainband A rainband is a cloud and precipitation structure associated with an area of rainfall which is significantly elongated. Rainbands can be stratiform or convective, and are generated by differences in temperature. When noted on weather radar ima ...
approximately east of the center. Despite being located within a favorable environment of warm
sea surface temperature Sea surface temperature (SST), or ocean surface temperature, is the ocean temperature close to the surface. The exact meaning of ''surface'' varies according to the measurement method used, but it is between and below the sea surface. Air mass ...
s and low
wind shear Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal ...
, Sergio only gradually intensified over the next couple of days, the system becoming a
Category 1 hurricane Category, plural categories, may refer to: Philosophy and general uses *Categorization, categories in cognitive science, information science and generally *Category of being * ''Categories'' (Aristotle) *Category (Kant) *Categories (Peirce) *C ...
on October 2 at 00:00UTC. Meanwhile, the storm tracked just south of west as a mid-level ridge developed to the north. At that point, the storm had developed a well-defined eye surrounded by clouds. The hurricane then began a period of
rapid intensification In meteorology, rapid intensification is a situation where a tropical cyclone intensifies dramatically in a short period of time. The United States National Hurricane Center defines rapid intensification as an increase in the maximum sustained w ...
, reaching Category 3 major hurricane status by 18:00UTC. The wind speed then leveled off for about 18 hours as the system underwent an
eyewall replacement cycle In meteorology, eyewall replacement cycles, also called concentric eyewall cycles, naturally occur in intense tropical cyclones, generally with winds greater than , or major hurricanes ( Category 3 or above). When tropical cyclones reach this int ...
. At the same time, the mid-level ridge had weakened, resulting in the storm traveling to the northwest. Sergio then began another period of intensification, becoming the eighth Category 4 hurricane of the season on October 4 at 00:00UTC, breaking the old record of seven set in
2015 File:2015 Events Collage new.png, From top left, clockwise: Civil service in remembrance of November 2015 Paris attacks; Germanwings Flight 9525 was purposely crashed into the French Alps; the rubble of residences in Kathmandu following the Apri ...
. Six hours later, the system peaked with maximum sustained winds of and a minimum central pressure of , while located about southwest of
Cabo San Lucas Cabo San Lucas (, "Saint Luke Cape"), or simply just Cabo, is a resort city at the southern tip of the Baja California Peninsula, in the Mexican state of Baja California Sur. As at the 2020 Census, the population of the city was 202,694 inhabitan ...
. The storm maintained peak intensity for 12 hours before weakening due to another eyewall replacement cycle. As a result, its structure deteriorated, the eye fading and the surrounding cloud tops warming. A faraway mid-latitude ridge caused Sergio to turn towards the southwest from October 5–6. After bottoming out as a low-end Category 3 hurricane on October 5 at 06:00UTC, Sergio began to intensify once more, reaching a secondary peak with winds of on October 6 at 00:00UTC. After maintaining its intensity for 18 hours, the hurricane began to weaken around 00:00UTC on October 7 due to
upwelling Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface. It replaces the warmer and usually nutrient-depleted surface water. The nutr ...
and a third eyewall replacement cycle. Soon after, Sergio began another turn, rotating from the southwest to the northeast over the next few days due to the influence of a mid-latitude
trough Trough may refer to: In science * Trough (geology), a long depression less steep than a trench * Trough (meteorology), an elongated region of low atmospheric pressure * Trough (physics), the lowest point on a wave * Trough level (medicine), the l ...
. It unexpectedly acquired some annular characteristics early on October 7, with the eye having doubled in size while most of the banding features disappeared. The system gradually weakened over the next two days, falling to tropical storm status on October 9 at 18:00UTC, due to cooling sea surface temperatures. Sergio made
landfall Landfall is the event of a storm moving over land after being over water. More broadly, and in relation to human travel, it refers to 'the first land that is reached or seen at the end of a journey across the sea or through the air, or the fact ...
near Los Castros, Baja California Sur, around 12:00UTC on October 12, as a tropical storm. After crossing over the Baja California Peninsula and traversing the
Gulf of California The Gulf of California ( es, Golfo de California), also known as the Sea of Cortés (''Mar de Cortés'') or Sea of Cortez, or less commonly as the Vermilion Sea (''Mar Bermejo''), is a marginal sea of the Pacific Ocean that separates the Baja Ca ...
, the storm made a second landfall near
Guaymas Guaymas () is a city in Guaymas Municipality, in the southwest part of the state of Sonora, in northwestern Mexico. The city is south of the state capital of Hermosillo, and from the U.S. border. The municipality is located on the Gulf of Califo ...
, Sonora, as a tropical depression around 18:00UTC, before dissipating over northwest Mexico around midnight. Its remnants continued northeastward, causing heavy rainfall and tornadoes in the United States. Sergio's slow movement speed and large size resulted in the ocean cooling as a result of its passage. Rainfall from Sergio was discovered to contain 11.8% less
Oxygen-18 Oxygen-18 (, Ω) is a natural, stable isotope of oxygen and one of the environmental isotopes. is an important precursor for the production of fluorodeoxyglucose (FDG) used in positron emission tomography (PET). Generally, in the radiopharmaceu ...
than expected of convective-based storms across the Sonora River Basin.


Preparations and impact


Mexico

The
Government of Mexico The Federal government of Mexico (alternately known as the Government of the Republic or ' or ') is the national government of the United Mexican States, the central government established by its constitution to share sovereignty over the republi ...
issued a
tropical storm watch Tropical cyclone warnings and watches are alerts issued by national weather forecasting bodies to coastal areas threatened by the imminent approach of a tropical cyclone of tropical storm or hurricane intensity. They are notices to the local popul ...
on October 10 along the western coast of the Baja California Peninsula from
Punta Eugenia Punta Eugenia is a headland in the Mulegé Municipality. It marks the Western tip of the Vizcaíno Peninsula, thus being the westernmost point on the mainland of the state of Baja California Sur. It belongs to the larger area of El Vizcaíno Bio ...
to Cabo San Lázaro and along the eastern coast from to San Evaristo. As Sergio rapidly approached the peninsula on the next day, the tropical storm watch on the west coast was upgraded to a tropical storm warning, while the watches on the east coast were upgraded to warnings later in the day. All watches and warnings were discontinued as Sergio moved inland. Civil protection agencies in
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
, Baja California Sur, and Sonora issued yellow alerts, indicative of moderate danger, in anticipation of severe weather conditions. Several municipalities around the landfall area in Sonora had orange alerts, which signaled high danger. Plan DN-III-E and the Marine Plan were activated in advance for Baja California Sur, allowing the
Mexican Army The Mexican Army ( es, Ejército Mexicano) is the combined land and air branch and is the largest part of the Mexican Armed Forces; it is also known as the National Defense Army. The Army is under the authority of the Secretariat of National De ...
to help with disaster relief efforts and rescue operations. A blue alert, meaning minimal danger, was issued for
Sinaloa Sinaloa (), officially the Estado Libre y Soberano de Sinaloa ( en, Free and Sovereign State of Sinaloa), is one of the 31 states which, along with Mexico City, comprise the Administrative divisions of Mexico, Federal Entities of Mexico. It is d ...
and emergency shelters were opened due to rainfall and Sergio's proximity. Sergio made landfall in western Baja California Sur and later in Sonora, bringing heavy rains and strong winds to northern Mexico. In Baja California Sur, Sergio's impact was mainly minimal, with homes experiencing power outages and roof damage. Multiple roads and schools in Loreto were damaged. In Sonora, almost 400 people had to evacuate to a temporary shelter as a result of flooding. Strong winds up to downed trees, utility poles, and damaged homes and businesses in Guaymas, causing approximately MX$40million (
US$ The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official ...
2.12 million) in damage as well as several power outages.
Hermosillo Hermosillo (), formerly called Pitic (as in ''Santísima Trinidad del Pitic'' and ''Presidio del Pitic''), is a city located in the center of the northwestern Mexican state of Sonora. It is the municipal seat of the Hermosillo Municipality, Her ...
experienced street flooding which impeded traffic and overflowed sewers in several areas; multiple power outages also occurred. A concert scheduled to take place in the city was canceled in the interest of public safety. In Punta de Aqua II, over of rain was reported. Mazatán and
Plutarco Elías Calles Plutarco Elías Calles (25 September 1877 – 19 October 1945) was a general in the Mexican Revolution and a Sonoran politician, serving as President of Mexico from 1924 to 1928. The 1924 Calles presidential campaign was the first populist ...
reported rainfall totals of and , respectively. The
Puerto Peñasco Municipality Puerto Peñasco Municipality is a municipality in Sonora in north-western Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the Uni ...
was impacted, causing flood damage to houses in the region. More than 1,000 schools were closed in Chihuahua and classes in 72 municipalities of Sinaloa were suspended. In the Chihuahuan municipality of
Nuevo Casas Grandes Nuevo Casas Grandes is a city and the seat of the Nuevo Casas Grandes Municipality in northern Mexico. It is located in the northwestern part of the state of Chihuahua, on the Casas Grandes or San Miguel river, situated in a wide, fertile valley o ...
, heavy rainfall flooded streets and houses. Throughout the state of
Michoacán Michoacán, formally Michoacán de Ocampo (; Purépecha: ), officially the Free and Sovereign State of Michoacán de Ocampo ( es, Estado Libre y Soberano de Michoacán de Ocampo), is one of the 32 states which comprise the Federal Entities of ...
, the combined effects from Sergio and nearby
Hurricane Rosa The name Rosa has been used for seven tropical cyclones in the Eastern Pacific Ocean. * Hurricane Rosa (1978) – threatened Baja California. * Tropical Storm Rosa (1982) – brushed southwestern Mexico. * Hurricane Rosa (1994) Hurricane Rosa ...
destroyed of crops.


United States

High waves from Sergio affected
Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only stat ...
and its remnants moved into
Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...
,
California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...
and
Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...
, generating heavy rains and spawning multiple tornadoes. Sergio produced waves and rip currents along the shores of Hawaii's Big Island,
Maui The island of Maui (; Hawaiian: ) is the second-largest of the islands of the state of Hawaii at 727.2 square miles (1,883 km2) and is the 17th largest island in the United States. Maui is the largest of Maui County's four islands, which ...
,
Molokai Molokai , or Molokai (), is the fifth most populated of the eight major islands that make up the Hawaiian Islands, Hawaiian Islands archipelago in the middle of the Pacific Ocean. It is 38 by 10 miles (61 by 16 km) at its greatest length an ...
, and
Oahu Oahu () (Hawaiian language, Hawaiian: ''Oʻahu'' ()), also known as "The Gathering place#Island of Oʻahu as The Gathering Place, Gathering Place", is the third-largest of the Hawaiian Islands. It is home to roughly one million people—over t ...
on October 10. As a result, high surf advisories were issued for east-facing shores. These swells gradually relaxed over the next couple of days. No injuries or damage was reported in Hawaii. In Arizona, a Pacific upper-level low and remnant moisture from Sergio led to heavy rainfall; some areas in
Phoenix Phoenix most often refers to: * Phoenix (mythology), a legendary bird from ancient Greek folklore * Phoenix, Arizona, a city in the United States Phoenix may also refer to: Mythology Greek mythological figures * Phoenix (son of Amyntor), a ...
recorded rainfall totals of and ankle-deep flooding. The
Arizona State Fair The Arizona State Fair is an annual state fair, held at Arizona State Fairgrounds. It was first held in 1884, but has had various interruptions due to cotton crop failure, the Great Depression era, World War I & World War II years & the COVID-1 ...
was closed for the first time in "recent memory" due to flooding. Damage on the fairgrounds and to the surrounding roads was estimated at US$50,000. A portion of Old U.S. Route 80 was closed between
Gila Bend Gila Bend (; O'odham: Hila Wi:n), founded in 1872, is a town in Maricopa County, Arizona, United States. The town is named for an approximately 90-degree bend in the Gila River, which is near the community's current location. As of the 2020 cen ...
and Buckeye after rainfall exceeding per hour caused flooding in the area. Moderate to heavy rainfall in the deserts southeast of Phoenix caused flash flooding, halting traffic on State Route 187 between state routes 87 and 387. Runoff from heavy rainfall in the
Maricopa Mountains Maricopa Mountains are a range of mountains in Maricopa County, Arizona.The range runs from and extends southeastward to . The range is protected as the North Maricopa Mountains Wilderness and South Maricopa Mountains Wilderness, divided by A ...
flowed across State Route 238, resulting in multiple closures from
Mobile Mobile may refer to: Places * Mobile, Alabama, a U.S. port city * Mobile County, Alabama * Mobile, Arizona, a small town near Phoenix, U.S. * Mobile, Newfoundland and Labrador Arts, entertainment, and media Music Groups and labels * Mobile ( ...
to
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and US$2,000 in damage. Numerous other road closures occurred throughout the
Phoenix Metropolitan Area The Phoenix Metropolitan Area – also the Valley of the Sun, the Salt River Valley, or Metro Phoenix (known by most locals simply as “the Valley”) – is the largest metropolitan area in the Southwestern United States, centered on the city ...
as a result of flash floods, damage in the region totaling approximately US$73,000. Moisture from Sergio's remnants also entered Southern California, producing thunderstorms mainly to the south of
Point Conception Point Conception (Chumash: ''Humqaq'') is a headland along the Gaviota Coast in southwestern Santa Barbara County, California. It is the point where the Santa Barbara Channel meets the Pacific Ocean, and as the corner between the mostly north-s ...
. Widespread storms caused
flash flood A flash flood is a rapid flooding of low-lying areas: washes, rivers, dry lakes and depressions. It may be caused by heavy rain associated with a severe thunderstorm, hurricane, or tropical storm, or by meltwater from ice or snow flowing o ...
s throughout the
Coachella Valley , map_image = Wpdms shdrlfi020l coachella valley.jpg , map_caption = Coachella Valley , location = California, United States , coordinates = , width = , boundaries = Salton Sea (southeast), Santa Rosa Mountains (southwest), San Jacint ...
, with a 12-hour rainfall total of observed at
Palm Desert Palm Desert is a city in Riverside County, California, United States, in the Coachella Valley, approximately east of Palm Springs, northeast of San Diego and east of Los Angeles. The population was 48,445 at the 2010 census. The city has been ...
. In nearby
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, hail up to in diameter was reported. Floodwaters up to deep were reported on a segment of
Interstate 10 Interstate 10 (I-10) is the southernmost cross-country highway in the American Interstate Highway System. I-10 is the fourth-longest Interstate in the United States at , following I-90, I-80, and I-40. This freeway is part of the originally pl ...
near Cactus City. Multiple flood-related road closures also occurred near Rimlon and Thousand Palms. The remnants of Sergio moved through Texas from October 12–13, producing severe thunderstorms that caused US$475,000 in damage throughout the state. About US$15,000 in damage was reported after wind gusts damaged a storage unit between
Eureka Eureka (often abbreviated as E!, or Σ!) is an intergovernmental organisation for research and development funding and coordination. Eureka is an open platform for international cooperation in innovation. Organisations and companies applying th ...
and Mildred. Wind gusts of caused about US$4,000 in damage to power lines and a carport near Greenwood. Outside of Shiloh, wind gusts destroyed a metal barn and either damaged or destroyed multiple trees, resulting in US$5,000 in damage. Wind gusts between were reported in numerous other counties. There were also reports of hail in several counties. Just outside Baxter, hail in diameter fell on several properties, causing US$5,000 in damage. Flash flooding affected the state, resulting in multiple road closures. In
Wink A wink is a facial expression made by briefly closing one eye. A wink is an informal mode of non-verbal communication usually signaling shared hidden knowledge or intent. However, it is ambiguous by itself and highly dependent upon additional c ...
, the intersection of State Highway 115 and Wildcat Drive was closed due to flooding. Outside of Midland, State Highway 158 experienced flooding near
Interstate 20 Interstate 20 (I‑20) is a major east–west Interstate Highway in the Southern United States. I-20 runs beginning at an interchange with Interstate 10, I-10 in Scroggins Draw, Texas, and ending at an interchange with Interstate 95, I-95 in Flo ...
. At least ten tornadoes spawned in Texas as a result of the increased moisture. An EF2 tornado near
Knickerbocker A Knickerbocker is a person from Manhattan (New York City, before 1898). A modern synonym is “New Yorker”. Knickerbocker or Knickerbockers may also refer to: People * Knickerbocker (surname), including a list of people with the surname, and ...
extensively damaged a metal building and either uprooted or snapped many trees, causing US$200,000 in damage. In
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, an EF0 tornado uprooted one tree, which caused another to fall on a home, which triggered roof damage, resulting in US$150,000 in damage. Approximately US$25,000 in damage occurred near
Sardis Sardis () or Sardes (; Lydian: 𐤳𐤱𐤠𐤭𐤣 ''Sfard''; el, Σάρδεις ''Sardeis''; peo, Sparda; hbo, ספרד ''Sfarad'') was an ancient city at the location of modern ''Sart'' (Sartmahmut before 19 October 2005), near Salihli, ...
when an EF0 tornado damaged a corner of a gymnasium, broke out windows on cars, bent down light-poles and handicap signs in a parking lot, and threw a trailer into a nearby field. Two tornadoes occurred near Chat. The first was an EF0 tornado that damaged a few trees as well as shingles and fences at multiple homes, generating US$15,000 in damage. The second was an EF1 tornado that substantially damaged one home, damaged the roof and deck of another, destroyed a shed, and tossed a boat and RV trailer, resulting in about US$50,000 in damage. An EF0 tornado near
Brandon Brandon may refer to: Names and people *Brandon (given name), a male given name *Brandon (surname), a surname with several different origins Places Australia *Brandon, a farm and 19th century homestead in Seaham, New South Wales *Brandon, Q ...
caused about US$5,000 in tree damage. At least four more EF0 tornadoes occurred: two in Navarro County, one in
Freestone County Freestone County is a county in the east-central part of the U.S. state of Texas. As of the 2020 census, its population was 19,435. Its county seat is Fairfield. The county was created in 1850 and organized the next year. History Native Ame ...
, and one in Panola County.


See also

* Weather of 2018 *
Tropical cyclones in 2018 During 2018, tropical cyclones formed within seven different tropical cyclone basins, located within various parts of the Atlantic, Pacific and Indian Oceans. During the year, a total of 151 tropical cyclones had formed this year to date. 102 ...
* List of Category 4 Pacific hurricanes * Other tropical cyclones named Sergio *
List of California hurricanes A California hurricane is a tropical cyclone that affects the state of California. Usually, only the remnants of tropical cyclones affect California. Since 1900, only two still-tropical storms have hit California, one by direct landfall from offsho ...
* List of Arizona hurricanes *
Hurricane Raymond (1989) Hurricane Raymond was the strongest tropical cyclone of the 1989 Pacific hurricane season, peaking as a strong Category 4 hurricane on the Saffir–Simpson hurricane scale. Forming out of a tropical wave on September 25, 1989, the tropical ...
 – A that impacted the same area, resulting in one death and over a million dollars (USD) in damage. *
Hurricane Javier (2004) Hurricane Javier was a powerful tropical cyclone whose remnants brought above-average rainfall totals across the western United States in September 2004. Javier was the tenth named storm, the sixth hurricane and the final major hurricane of the 20 ...
 – A that made landfall in the same area, causing minimal damage. * Hurricane Rosa (2018) – A long-lived that took a similar path, made landfall in Baja California as a tropical depression.


Notes


References


External links

* The National Hurricane Center'
advisory archive on Hurricane Sergio
{{DEFAULTSORT:Sergio (2018) 2018 Pacific hurricane season Category 4 Pacific hurricanes Hurricanes in Baja California Sur Hurricanes in California Hurricanes in Arizona Hurricanes in New Mexico Hurricanes in Texas Sergio Hurricanes in Baja California Hurricanes in Sonora Hurricanes in Chihuahua