cdgasra.blogg.se - Convective outlook

Provide some information in the text, but refer to reader to the most recent ACUS01 KWNS from If the CONVECTIVE SIGMET contains only forecast information, it is called an Outlook.

Slight differences between the advisories. Two regions (say, West and Central) repeating most of the same information. Also, given some overlap in reporting regions, you may notice a two advisories issued by does notīecause they are issued every hour, may show more than one Convective SIGMETĪt the same time. SIGMETs.) If no convective SIGMET is forecast then the region issues "CONVECTIVE SIGMET.NONE".

Surface winds 50+ knots due to severe thunderstormĪ Convective SIGMET is issued every hour (at H+55) for each of threeĬontinental US regions (Alaska and Hawaii only issue.

Thunderstorms with heavy precipitation affecting 40%+ of an area at least 3,000 square miles.

In Alaska and Hawaii, SIGMETs are also issued for tornadoes, a line of thunderstorms, embedded thunderstorms, or hailīecause the issued area is very large, PIREPs are useful to see current conditions in the area.Ĭonvective SIGMETs are issued for severe convective activity, which implies severe turbulence, severe icing, and

Duststorms and sandstorms lowering visibility to less than three miles.

Severe Turbulence (similarly, only if not associated with thunderstorms).

Severe Icing (not associated with thunderstorms - otherwise, it is a Convective SIGMET).

These forecast areas in the continental US) correspond to theįA Area Forecast locations: SFO/San Francisco, SLC/Salt Lake City, CHI/Chicago,ĭFW/Dallas-Fort Worth, BOS/Boston, and MIA/Miami. Of the weather hazard is within the forecast area. Small portion of the area at any particular time.Ī SIGMET may be issued at any time, and has a maximum forecast period of 4 hours (6 hours for hurricanes).Įach forecast area will issue a separate SIGMET if any part Note that the particular hazard may be present in only a That it covers an area of at least 3,000 square miles. SIGMETs are Inflight Weather Advisories for Significant Meteorological hazards.