Intellicast - Weather Alerts

To view the watches and warnings information that we have available you will need to select your city, county, or state first.

Enter City, State or Zip Code to Select a Location from the List

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The National Weather Service's Watches, Warnings and Advisories by state counties include: Thunderstorm, Tornado, Flood, Flash Flood, Winter Storm, High Wind, Gale, Small Aircraft, High Surf, Marine, Heat, Air Quality, Ashfall, Hazardous, and Special Statements.

Weather Alerts: SAN MATEO County, California

» View a list of states with weather alerts

Stay ahead of oncoming storm systems with our Severe Weather Tracking maps.

Severe weather is any destructive weather phenomenon. The term is usually used to refer to severe thunderstorms and related phenomena, such as tornados, hail, and downbursts. Severe weather can also refer to snowstorms, ice storms, blizzards, flooding, hurricanes, and high winds.

Severe Outlook Today
WSI's Severe Outlook Map displays current Watches, Warnings and Advisories via County Fill colors.

Severe Outlook Tomorrow
WSI's Severe Outlook Forecast Map displaying projected Watches, Warnings and Advisories.

Watches & Warnings »
1Km Storm Watch »
Metro Storm Watch »

Lightning Strikes»
THUNDERcast »

Providing "weather, water cycle, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy."

Weather Alerts by Type

Coastal Flood Warning

Dense Fog Advisory

Excessive Heat Warning

AZ CA

Fire Weather Warning

CA ID OR

Fire Weather Watch

CA OR WA

Flash Flood Watch

AR CA CO GU KS NM NV OK TX

Flood Warning

AR KS ND

Heat Advisory

OR WA

High Surf Advisory

Additional Severe Weather Maps

Severe Outlook Today
WSI's Severe Outlook Map displays current Watches, Warnings and Advisories via County Fill colors.

Severe Outlook Tomorrow
WSI's Severe Outlook Forecast Map displaying projected Watches, Warnings and Advisories.

THUNDERcast
The THUNDERcast map shows areas of probability for regional or national thunderstorms for the current day.

1Km Storm Watch
The 1Km map allows you to view 1 kilometer (km) resolution radar imagery both nationally and regionally.

Metro Storm Watch
The Metro map allows you to view 1 kilometer (km) resolution radar imagery.