Hazardous Inflight Weather Advisory Service (HIWAS) was a continuous broadcast of hazardous weather information which is transmitted over selected

VOR VOR or vor may refer to: Organizations * Vale of Rheidol Railway in Wales * Voice of Russia, a radio broadcaster * Volvo Ocean Race, a yacht race Science, technology and medicine * VHF omnidirectional range, a radio navigation aid used in a ...

s. This hazardous weather includes AIRMETs, SIGMETs, Convective SIGMETs, Center Weather Advisories (CWAs), Severe Alert Weather Watches (AWWs), and urgent PIREPs. The presence of HIWAS information on a VOR was indicated on a sectional or terminal area chart by an "H" in the upper-right corner of the box surrounding the NAVAID frequency. On 8 January 2020 the Federal Aviation Administration discontinued the HIWAS service in favor of

Flight Information Services-Broadcast (FIS-B) Flight or flying is the process by which an object moves through a space without contacting any planetary surface, either within an atmosphere (i.e. air flight or aviation) or through the vacuum of outer space (i.e. spaceflight). This can be ...

and other modern means of accessing in-flight weather data.

References

{{reflist Meteorological data and networks Weather warnings and advisories