Dangerous Heat Wave Continues; Enhanced Area of Severe Thunderstorms Today

A prolonged, dangerous heat wave will continue today in the Midwest and Mississippi Valley, and persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Widespread moderate to extreme HeatRisk is forecast. Scattered wind damage and large hail are expected from severe thunderstorms impacting parts of Nebraska into Iowa today. Read More >

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Last Map Update: Fri, Jul 3, 2026 at 9:04:39 am PDT

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

National Weather Service San Joaquin Valley, CA

Small Craft Advisory

Lake Wind Advisory

High Temperature Forecast

Wind Gust Forecast

Mountain Thunderstorm Chances

Outdoor Recreation Safety

4th of July Fire Safety

High temperature forecast for the next 7 days. A slight warming trend is expected into the holiday weekend, although generally seasonable temperatures look to persist.

Wind gust forecast for interior NorCal the next 7 days. Periodically breezy onshore winds persist through the weekend and into next week. Strongest winds expected in the Delta and vicinity.

A slight chance of isolated mountain thunderstorms is possible along the Sierra crest and points eastward from Interstate 80 southward this afternoon.

Summer outdoor recreation safety. Check weather forecasts, road conditions, and local burn restrictions beforehand. Pack plenty of water. Protect your skin from the sun. Pay attention to water speed and currents. Wear a life jacket on the water.

Holiday Weekend Safety. Obey local firework and burn bans. Properly extinguish campfires and used fireworks & matches. Don’t let vehicle chains drag on the ground. Don’t drive over dry grass. Stay hydrated. Wear a life jacket near water. Properly secure tents.