Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >
Seattle, WA
Center Weather Service Unit
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) |
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Seattle, WA
3101 Auburn Way South
Auburn, WA 98092
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