Triple-Digit Heat and Severe Storms through Midweek

Close-up Hot temperature fahrenheit or celsius.

Triple-digit heat indexes across the nation and severe storms are on tap through midweek, while unseasonable winter weather hits the Northwest and West, plus, today’s weather alerts and the 3-day forecast.

NWS weather alerts

Here are the latest weather alerts from the National Weather Service (NWS) for Monday:

Winter storm warning: Western Montana and central Idaho.

Winter weather advisory: Western Montana and central Idaho.

Freeze warning: Southwest Oregon, Northern California; northern, central and northeastern Nevada;

Frost advisory: Northern and northeastern Nevada.

Flash flood warning: southern Michigan, northern Indiana, northwestern and southwestern Ohio, northern Kentucky, and western West Virginia.

Flash flood watch: eastern Washington, northern and central Idaho, western Montana.

Red flag alert: portions of Nevada, Utah, Arizona, Colorado, and New Mexico

The 3-day forecast

Here is the weather outlook according to the latest 3-day forecast for the National Weather Service (NWS).

Monday: Severe weather, coast-to-coast heat wave and surprising winter weather in West and Northwest

Triple-digit heat indexes for most of the nation spanning from coast-to-coast. Here are some of the sample temperatures anticipated for Monday, according to the forecast from Weather Channel: Phoenix 108, El Paso 105, Roswell104, Laredo 106, Dallas 103, Omaha 107, North Platte 107, Sioux Falls 105, Chicago 101, St. Louis 109, Memphis 112, Atlanta 101, Raleigh 105.

Surprising winter weather (see alerts above) over parts of the West and Northwest will bring the possibility of mixed precipitation over parts of Washington, Oregon, Idaho, Montana, Wyoming and Utah, as well as a flood risk (see above).

Critical fire weather is possible over portions of Utah, Arizona, New Mexico, Colorado, Kansas and Nebraska (see red flag alerts above).

Severe thunderstorms over the upper Midwest and Great Lakes area, possible flash flooding in the Ohio Valley and mid-Atlantic.

The first storm front will bring a Level 2 severe weather risk over portions of Montana, Wyoming, South Dakota, North Dakota and Minnesota, with the possibility of flash flooding over portions of North Dakota and Minnesota.

A second storm front is forecast to bring a Level 2 and Level 3 severe weather risk over portions of Minnesota, Wisconsin, Illinois, Michigan, Indiana, Kentucky, Ohio, West Virginia, Virginia and Pennsylvania. A risk of flash flooding over portions of Michigan, Indiana, Ohio, Kentucky and West Virginia (see above).

Tuesday: Severe weather on three fronts, heat wave continues, winter weather in Northwest

Triple-digit heat indexes will continue for much of the nation.

Another day of winter-like weather over the Northwest will bring mixed precipitation, with possible frost and freezing, to portions of Washington, Oregon, Idaho, Montana and Wyoming.

Scattered thunderstorms over portions of the upper Midwest, Southeast and mid-Atlantic will bring a Level 2 severe weather risk on three separate fronts, according to the Storm Prediction Center (SPC).

The first storm front is over Eastern North Dakota into northwestern Minnesota.

A second storm front over southern and eastern Nebraska, northwestern Missouri, into southwestern, central and northeastern Iowa.

A third storm front over central and eastern North Carolina, central and eastern Virginia, northwestern West Virginia, southern Maryland and Delaware.

Wednesday: Severe weather, Eastern thunderstorms

Thunderstorms over the Midwest, Great Lakes areas, and much of the eastern part of the nation.

Level 2 severe weather risk over central and eastern Iowa, southeastern Minnesota, most of Wisconsin, into northern Michigan, according to the SPC.