Weather across America 7/13/25

(NATIONAL) Heavy rain and a flash flooding threat over the Mid-Atlantic and Upper Midwest, heat remains over much of the eastern and western U.S. and an increasing heavy rainfall and flash flood threat for Florida Monday and Tuesday.

A slowly moving front, draped from the eastern Great Lakes back to the southern Plains, will help instigate widespread showers and thunderstorms over the next couple of days along and south/east of the boundary.

In addition, high humidity levels will support locally heavy rainfall that may lead to flash flooding nearly anywhere in this area — especially in urban areas and where it has been recently wet.

Ongoing rainfall over areas of New York/Mid-Atlantic, the middle Mississippi Valley, and eastern Texas will cause a threat of flash flooding this evening before winding down overnight.

By Monday, the I-95 urban corridor from the New York metro area southward through Philly/DC into Richmond will again see another chance of showers/storms with the potential for flash flooding.

Temperatures will be very warm/hot (near and several degrees above normal), and heat index values will be modestly high, yielding HeatRisk values in the Moderate (Level 2 of 4) category in the Midwest/Northeast/Mid-Atlantic, and into the Major category (Level 3 of 4) over parts of the Southeast Monday.

Rainfall will cool temperatures slightly but raise humidity levels. By Tuesday, the expanse of rainfall will decrease as the front starts to dissipate, but the Mid-Atlantic will still see a chance for localized flash flooding.

For much of the interior West, temperatures will remain hot on Monday (well into the 90s/100s), with HeatRisk values in the Moderate to Major categories.

Heat advisories and Extreme Heat Warnings are in effect again on Monday for areas from Las Vegas to Northern California and southwestern Oregon.

The immediate California coast will remain cool, with temperatures in the 60s to low 70s.

In the Four Corners region, monsoonal moisture will increase this week. Showers may be more widespread (though still on the lighter side). Temperatures will ease back from the higher levels by midweek.

Across the northern tier, a wavy frontal boundary will slowly sink southeastward with an increase in rainfall over the region.

There is a Marginal Risk of excessive rainfall on Monday along the Canadian border, and a Slight Risk on Tuesday (northern Plains to the Upper Midwest).

Behind the cold front over Montana, high pressure will bring in much cooler air. High temperatures will drop from the 70s/80s on Monday to the 50s/60s on Tuesday (15–20 degrees below normal).

Finally, over Florida, the National Hurricane Center is monitoring an area off the Southeast coast for potential development.

This feature will move across the Peninsula over the next two days, bringing with it an increasing chance of heavy rainfall.

A Slight Risk of excessive rainfall is noted for both Monday and Tuesday.

Sensitive and urban areas along and south of I-4 will be most vulnerable.