Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Severe thunderstorms are expected across parts of the central and southern High Plains, central Great Lakes, and Ozarks Wednesday. Read More >

The Hydrologic Ensemble Forecasting System (HEFS) is a probabilistic forecasting tool currently under development by the National Weather Service (NWS). The goals of HEFS are to provide hydrologic forecasts including an analysis of “probable outcomes” and to minimize biases in the atmospheric models and in the hydrologic models.

Below is information about HEFS:

Hydrologic Ensemble Forecast System (HEFS)
- HEFS on NWPS (Iowa)
- HEFS Experimental Data Webpage
  - NWS Des Moines service area
HEFS Resources
- Information and FAQs about HEFS

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Areas of Dangerous Heat and Severe Thunderstorms

Hydrologic Ensemble Forecast System (HEFS) Information