National Weather Service United States Department of Commerce

Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Reservoirs may have a variety of uses from flood control to water supply to electricity generation. Reservoir storage levels can be an indicator of long term water supply deficiencies and drought.

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SCIPP Reservoir Water Supply Tool
Interactive map of water supply for reservoirs in Oklahoma, Texas, and Louisiana