Tracking Two Storms Impacting the Northern U.S. Through Thanksgiving and into This Weekend

Heavy lake effect snow, gusty winds, and localized blizzard conditions will persist through Thanksgiving near and downwind of the Great Lakes. Rain and mountain snow are forecast for the Pacific Northwest. Confidence is increasing for another winter storm to develop over the northern and central Rockies Friday and track across the central Plains through the Midwest and Great Lakes this weekend. Read More >

Graphical HWO - Flash Flooding Threat

This graphic shows the expected coverage of any potential flash flooding within the threatened area.

For example, a yellow shade (corresponding to the "Isolated" category) might reflect the possibility of an isolated thunderstorm that produces enough heavy rain to cause flash flooding within the shaded area. Conversely, a red color (or "Widespread" category) covering several counties would reflect a larger area of heavy rain that could cause flash flooding across multiple areas in those counties.

Click the graphic to return to the graphical HWO page.

Categories

None	No flash flooding is expected.
Isolated	A few instances of flash flooding are possible within the threatened area.
Moderate	Several instances of flash flooding are possible within the threatened area.
Widespread	Numerous instances of flash flooding are possible within the threatened area.

Related Links

Graphical Forecast (includes precipitation amounts)
AHPS (Advanced Hydrologic Prediction Service)

Related Text Products
(Note: These are the latest products issued, so they may be old. Check the date and time. For more information on what these products are, see our Product Guide.)

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Weather Map

NWS Huntsville SitRep

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Tracking Two Storms Impacting the Northern U.S. Through Thanksgiving and into This Weekend

Flood Threat for Northern Alabama and Southern Middle Tennessee