A Moderate Risk (Level 4 of 5) of severe thunderstorms is expected across the Midwest today, especially portions of Iowa, Missouri, Wisconsin and Illinois. Damaging winds, large hail and a few strong tornadoes are expected. A dangerous early season heat wave will continue this week and expand from south Texas through portions of the central Gulf Coast by this weekend. Read More >
Text of all SIGMETs Around Contiguous Western US |
None Found |
Description of Convective and Non-Convective SIGMETs SIGMETs are Inflight Weather Advisories for Significant Meteorological hazards. A SIGMET is "widespread" in that it covers an area of at least 3,000 square miles. Note that the particular hazard may be present in only a small portion of the area at any particular time. SIGMETS are issued for:
Convective SIGMETs are issued for severe convective activity, which implies severe turbulence, severe icing, and low-level wind shear. Specifically:
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Map of SIGMETs (including International) |