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.

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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.

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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

Air Quality Alert

AZ TX

Dense Fog Advisory

Excessive Heat Warning

AZ CA OK

Fire Weather Warning

ID NV OR UT WA WY

Fire Weather Watch

ID MT WY

Flash Flood Watch

Flood Advisory