Widespread Flooding Threat across US, Last Day of Heat before Cool Down

Rain On Rainbow Umbrella

Coast-to-coast thunderstorms will bring flooding threats to several areas across US and continue over several days, Last day of heat before pattern change brings cool down, More weather news and 3-day forecast.

NWS weather alerts for Tuesday

Here are Tuesday’s weather alerts from the National Weather Service (NWS).

Excessive heat warning: New Jersey, Delaware, southeastern Pennsylvania, eastern Maryland, eastern Washington, northern Idaho.

Heat advisory for portions of: New Hampshire, Massachusetts, Rhode Island, Connecticut, New York, Pennsylvania, New Jersey, Maryland, Delaware, Washington, Idaho, Oregon.

Flood warning: northern and northeastern South Dakota; eastern Iowa; northwestern, west central and southern Illinois; eastern and southeastern Missouri; southern Indiana; western Kentucky.

Flood watch: northern, northeastern, central and southern Nevada; Southern California and deserts; southwestern Utah; western, northwestern central and southern Arizona; northern, central and southwestern New Mexico; central, eastern, and northern Kentucky; southern and eastern Ohio; western, north-central, and northern West Virginia; southwestern Pennsylvania.

Coastal flood advisory: southeastern Louisiana; southern Mississippi; southern Alabama; Pensacola, Florida.

Red flag warning: Northern, northeastern, central and south-central Oregon; northern California.

Insect alert: Mosquitoes and cicadas

Kansas mosquitoes: Severe

Parts of Kansas, particularly Topeka, has just been alerted that the city’s predicted population of mosquitoes will be at its highest possible level of “severe” Monday through Thursday this week, CJ Online reported.

Michigan cicadas

Scientists say the annual appearance of cicadas in Michigan will be excessively loud this summer, comparing the noise level to that of a motorcycle, MLive reported.

The 3-day forecast: Multiple days of thunderstorms and flooding threat, heat to subside

Thunderstorms will stretch the width of the lower 48 over several days this week, bringing a multi-day threat of flooding to numerous areas, while a cold front will descend over the South and move east, diminishing heat and temperatures by Wednesday.

Here is the latest 3-day forecast from the National Weather Service (NWS).

Tuesday: Thunderstorms, flood risk, dangerous heat

Dangerous heat in the Northwest and the Northeast (see heat alerts above).

Thunderstorms stretch from the West Coast to the East Coast, particularly along the southern corridor and over the entirety of the South, Ohio Valley, mid-Atlantic and Northeast.

A widespread flooding threat in the West and Southwest, as well as over the mid-South and Ohio Valley (see flood alerts above).

Wednesday: Flood risk expands over several states

Thunderstorms across the US, with a similar pattern to Tuesday, while expanding the risk of flooding. In the east, heavy rain with the potential of flash flooding will expand further south and Northeast as the flood risk will include portions of Alabama, Georgia, South Carolina, Tennessee, North Carolina, Kentucky, Virginia, Ohio, West Virginia, Pennsylvania, Maryland, Delaware and New Jersey.

In the West, the flashlight risk will expand northward to include portions of Idaho, Nevada, Utah, California, Arizona and New Mexico.

In the Gulf, potential flooding over portions of southeastern Louisiana and southern Mississippi.

Thursday: Thunderstorms from California to Maine, Southwestern flood risk

Scattered thunderstorms over parts of the West, the northern tier, all along the southern corridor and stretching from Florida to Maine.

Heavy rain with the potential of flash flooding over parts of the West and Southwest to include portions of Utah, Nevada, Arizona and New Mexico.