78 Million Under Severe Weather and Flood Threat from Montana to Virginia

Widespread thunderstorms and soaring heat will fuel the chance of severe weather throughout the week, a severe weather risk on 3 fronts, potential flash flooding spans most of the US on Wednesday. The 3-day forecast.

NWS weather alerts for Wednesday

Here are the latest weather alerts by the National Weather Service (NWS) for Wednesday:

Flood watch: Southeastern Montana; Western South Dakota; northeastern Wyoming; southern Michigan; northern Indiana; northern, central and southwestern Ohio; northern Kentucky; West Virginia; Washington, D.C., central and western Maryland; northern Virginia.

Severe thunderstorm watch: Southwestern Ohio; northern Kentucky; West Virginia.

Excessive heat warning for portions of: Kansas, Missouri, Illinois, Indiana, Kentucky, Arkansas, Tennessee, Alabama, Mississippi, and Louisiana.

Heat advisory for portions of: Kansas, Oklahoma, Texas, Missouri, Arkansas, Louisiana, Illinois,, Indiana, Ohio Kentucky, Tennessee, Mississippi, Alabama, Georgia, South Carolina, North Carolina, Virginia.

The 3-day forecast: Severe weather, flooding risk, excessive heat throughout the week

Widespread thunderstorms will bring the threat of severe weather, heavy rain and potential flash flooding through the weekend. Above-average heat for the Eastern US will be excessive in many areas.

Monday: Severe weather on 3 fronts, expansive flooding threat, heat

Thunderstorms will stretch from Montana to the Atlantic shores of Virginia, and along with them the potential severe storms, heavy rain and flash flooding that could impact 78 million Americans are more.

Level 2 severe weather risk over three fronts on Wednesday, according to the Storm Prediction Center (SPC). The first is in the West over most of Montana into northeastern Wyoming and southwestern Nebraska. The second is in the central US over northeastern Colorado into southwestern Nebraska and northwestern Kansas. The third is in the East over southern Indiana and Ohio, into central and eastern Kentucky, central and eastern West Virginia, most of Virginia, eastern Tennessee, most of North Carolina, northern South Carolina and northeastern Georgia.

The NWS forecast shows heavy rain with potential flash flooding threat for portions of: Montana, Wyoming, South Dakota, Nebraska, Colorado, Kansas, Iowa, Missouri, Illinois, Indiana, Ohio, Kentucky, West Virginia, Pennsylvania, Maryland, Delaware, Virginia and New Jersey

Thursday: Severe weather on 2 fronts, expansive flash flood risk

Two strong weather fronts with a Level 2 severe weather risk, according to the SPC. The first is to the Northwest over Idaho and Montana. The second is to the East over Illinois, Indiana, Kentucky, Virginia, Tennessee, North Carolina, Alabama, Georgia, and South Carolina.

An expansive risk of flash flooding stretches from Montana into the Dakotas, then farther south over Nebraska, Iowa, Missouri, Illinois, Indiana, Kentucky, West Virginia, Tennessee, Virginia, North Carolina and South Carolina.

Friday: Severe weather in Northwest, flash flooding risk for East

Level 2 severe weather risk over much of Montana. In the East, The current SPC forecast shows only a marginal Level 1 risk over parts of the Missouri and Ohio Valleys into the mid-South and Southeast. However, conditions could ramp up as we move closer to the weekend.

The NWS forecast shows potential heavy rain with flash flooding possible over portions of Missouri, Illinois, Indiana, Ohio, Kentucky, West Virginia, Virginia, Tennessee, North Carolina and South Carolina.