Hot and Humid with Widespread Thunderstorms and a Risk of Flooding

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Hot and humid conditions are expected for much of the nation on Tuesday as widespread thunderstorms will bring the risk of flooding to the nation’s midsection and South, while extreme heat continues in the Northeast and Southwest.

US weather outlook for Tuesday, July 28, 2020

Heat and humidity is the story of the day, as widespread thunderstorms across the country will hold in the heat and bring a flooding threat to many areas.

Northeast: Some of the hottest temperatures of the year amid scattered thunderstorms.

Mid-Atlantic: Scattered thunderstorms.

Southeast: Mostly hot and humid.

South & Mid-South: Scattered thunderstorms with the threat a flooding.

Ohio Valley: Warm and will range from sunny to partly cloudy.

Central US: Strong thunderstorms and heavy rain with the possibility of flash flooding.

Northwest & Northern Rockies: Hot conditions with scattered thunderstorms over portions of Rockies with potential flooding over portions of southern Montana and northern Wyoming.

West: Scattered thunderstorms over Colorado and New Mexico, partly cloudy on the West Coast, with excessive heat in the southern areas.

Southwest: Extreme heat.

Flood alerts

The National Weather Service (NWS) is warning of heavy rain with the possibility of flash flooding on Monday over portions of south-central Montana and northern Wyoming to the west, with a large area of potential flooding over central and eastern Oklahoma and northeastern Texas.

The NWS has issued flood alerts for the following areas.

Flood warning: Central Oklahoma; southeastern Kansas; northern and northeastern South Dakota; southern Texas.

Flood and Flash flood watch: Southern Texas; southeastern Louisiana; coastal areas of southern Mississippi; central and eastern Oklahoma; northwestern Arkansas; western South Dakota; northeastern Wyoming.

Heat advisories and warnings

The National Weather Service (NWS) has issued heat advisories and warnings for the following locations:

Excessive heat warning: southeastern California and deserts; northern, northwestern, central, southern, and southeastern Arizona; southern Nevada.

Heat advisory: eastern and southeastern Washington; northern Idaho; Northeast Oregon; southern Maine; southern New Hampshire; eastern and southern Massachusetts; Rhode Island; Connecticut; New York City and surrounding areas, eastern New York; New Jersey; Delaware; southeastern Pennsylvania; Washington, D.C.; Delaware; central Maryland; Northern Virginia; eastern West Virginia; Northeastern, central, eastern and southeastern North Carolina; northeastern South Carolina.

US weather forecast: July 28, 2020

West: San Francisco 65, partly cloudy; Los Angeles 81, partly cloudy; San Diego 75, partly cloudy; Reno 94, sunny; Las Vegas 109, sunny; Salt Lake City 89, partly cloudy; Denver 85, thunderstorms.

Northwest & Northern Rockies: Seattle 81, sunny; Medford 101, mostly sunny; Boise 93, partly cloudy; Cut Bank 91, partly cloudy; Billings 94, thunderstorms; Minot 85, sunny; Rapid City 90, partly cloudy; Cheyenne 80, thunderstorms.

Southwest: Phoenix 113, sunny; Tucson 102, partly cloudy; Albuquerque 87, thunderstorms; El Paso 98, sunny; San Antonio 96, thunderstorms; Brownsville 88, thunderstorms.

Central & Upper Midwest: Lubbock 96, partly cloudy; Dallas 87, thunderstorms; Oklahoma City 79, thunderstorms Kansas City 89, partly cloudy; Minneapolis 85, partly cloudy; Madison 84, mostly cloudy.

Ohio Valley: Chicago 88, mostly sunny; St. Louis 90, partly cloudy; Detroit 87, sunny; Cincinnati 89, partly cloudy; Indianapolis 86, partly cloudy.

South: Houston 88, thunderstorms; New Orleans 83, thunderstorms; Memphis 92, partly cloudy; Birmingham 86, thunderstorms; Atlanta 90, thunderstorms; Charlotte 96, thunderstorms; Jacksonville 91, thunderstorms; Tampa 91, thunderstorms; Miami 88, partly cloudy.

East: Norfolk 98, mostly sunny; Washington, D.C. 94, thunderstorms; Philadelphia 93, thunderstorms; Buffalo 80, sunny; New York City 94, thunderstorms; Boston 93, thunderstorms; Caribou 84, thunderstorms.