Severe Weather and Heavy Rainfall Potential for the Plains; Coastal Low Across the mid-Atlantic

An upper trough and frontal boundary will focus showers and thunderstorms across portions of the Plains through early Monday; A few severe thunderstorms along with heavy rainfall are expected. Meanwhile, low pressure off the Southeast Coast will bring inclement weather across the mid-Atlantic coast through Monday. This system is forecast to meander off the coast then track inland early this week. Read More >

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Last Map Update: Sun, Sep 14, 2025 at 9:36:17 pm PDT

Watches, Warnings & Advisories

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National Weather Service San Joaquin Valley, CA

National Weather Service Los Angeles, CA

Small Craft Advisory

Becoming Warmer with Moderate HeatRisk

Heat Impacts this Week

Near Critical Fire Weather Threat Thu-Fri

A warming trend is expected through the first half of the week, with the hottest day anticipated to be Tuesday. With both overnight and afternoon temperatures projected to range between 5 and 15 degrees above normal values, this will translate to Moderate HeatRisk. Moderate HeatRisk means there's a potential for heat-related illnesses to those sensitive to heat, such as older adults (65+), infants, athletes, outdoor workers, those without effective cooling, and those with chronic diseases. Some risk to general population. Be sure to drink plenty of water or sport drinks, reduce time spent outdoors or say in the shade, and open windows at night.

Isolated (10-30% chance) dry thunderstorms (≤ 0.10 inches of rainfall) producing abundant lightning over receptive vegetation. New wildfire starts are the primary threat with extreme fire behavior and rapid rates of spread likely on new and existing wildfires due to erratic and gusty outflow winds. Be sure to exercise fire weather safety and make an emergency plan. Be sure to stay alert and have multiple ways to receive weather information. Know your evacuation zones and routes and use them if necessary.

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Severe Weather and Heavy Rainfall Potential for the Plains; Coastal Low Across the mid-Atlantic

NWS Forecast Office San Francisco, CA