National Weather Service United States Department of Commerce

Southwest Monsoon Flooding

Monsoonal conditions in the Southwest will lead to threats of flash flooding through the weekend. Severe thunderstorms will be possible through Friday night in the northern tier of the country and Saturday afternoon in the vicinity of the Southern Great Lakes. Warm conditions have prompted Heat Advisories for portions of the Midwest and ArkLaMiss this weekend. Read More >

NWR Specific Area Message Encoding (SAME)

 

Detailed SAME System Specification (pdf file)

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Explanation of NWR and SAME

NWR service to a county depends on reliable signal reception, which typically extends in about a 40 mile radius from the transmitter, assuming level terrain. Counties without NWR coverage or partial NWR coverage are indicated. Some counties or parts of counties, especially in mountainous areas, may not have reliable reception due to signal blockages or excessive distance from the transmitter.