Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

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Last Map Update: Sun, Aug 17, 2025 at 8:08:08 pm PDT

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National Weather Service San Joaquin Valley, CA

National Weather Service Los Angeles, CA

Small Craft Advisory

Cool Weekend; Becoming Warmer Next Week

The weekend will remain relatively cool for most areas thanks to the marine layer and onshore winds. This will translate to patchy to areas of drizzle and/or very light rain largely along coastal regions. This will keep temperatures below normal through Tuesday. Thereafter, a mid-level high pressure system will drift to the west resulting in weaker onshore flow, limiting the inland reach of the marine layer (the coast will likely remain cloudy and cool). This will translate to hotter conditions and pockets of Moderate HeatRisk across the interior. Check back for updates to the forecast.

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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

NWS Forecast Office San Francisco, CA