Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Effective August 28, 2019, the National Weather Service (NWS) in North Platte, NE will change the flood category stages for the North Platte River at Lewellen (LEWN1).

All NWS flood warnings, flood statements, flood advisories, flood watches, probability outlooks, and NWS hydrographs on the Advanced Hydrologic Prediction Service (AHPS) will reference the new category levels. This change is part of a recent evaluation of the levels based on high water, flood events, and impacts over the past 10 years.

The new flood categories will be as follows (all values at level above gage zero datum) at the North Platte River at Lewellen:

New Flood Categories	Previous Flood Categories
Action Stage: 7.0 ft	Action Stage: 6.5 ft
Flood Stage: 8.0 ft	Flood Stage: 7.5 ft
Moderate Flood Stage: 9.0 ft	Moderate Flood Stage: 8.5 ft
Major Flood Stage: 10.0 ft	Major Flood Stage: 9.5 ft
Gage zero datum: 3286.992 ft above MSL NAVD88

The National Weather Service welcomes public feedback. If you have any questions or comments on this change, please contact:

Kenneth Roberg
Lead Forecaster/Hydrology Focal Point
(308) 532-4936
kenneth.roberg@noaa.gov

National Weather Service
5250 East Lee Bird Dr
North Platte, NE 69101

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Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Lewellen River Flood Category Changes - Effective August 28, 2019