San Mateo County Resident Portal

Welcome to the non-official San Mateo County Resident Portal.

View public safety alerts, emergency alerts, weather warnings and resources.  Find government and nonprofit resources, and related private sector services. See detailed weather forecasts. Ask questions, provide feedback and collaborate. Get news and information.

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Public Safety Alerts

Headline: Flood Advisory issued November 22 at 3:30PM PST until November 23 at 12:30AM PST by NWS San Francisco CA
Description: * WHAT...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of northern California, including the following counties, southeastern San Mateo, northwestern Santa Clara and Santa Cruz. * WHEN...Until... more
Effective: Friday, November 22, 2024 - 15:30
Expires: Saturday, November 23, 2024 - 00:30
Urgency: Expected
Severity: Minor
Sender: NWS San Francisco CA
Headline: Flash Flood Warning issued November 22 at 2:00PM PST until November 22 at 5:00PM PST by NWS San Francisco CA
Description: FFWMTR The National Weather Service in San Francisco has issued a * Flash Flood Warning for... Northwestern San Mateo County in northern California... * Until 500 PM PST. * At 200 PM PST, local law enforcement reported flash flooding in NW San... more
Effective: Friday, November 22, 2024 - 14:00
Expires: Friday, November 22, 2024 - 17:00
Urgency: Immediate
Severity: Severe
Sender: NWS San Francisco CA
Headline: Flood Advisory issued November 22 at 11:44AM PST until November 22 at 8:00PM PST by NWS San Francisco CA
Description: * WHAT...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of northern California, including the following counties, southeastern San Francisco and San Mateo. * WHEN...Until 800 PM PST Friday. *... more
Effective: Friday, November 22, 2024 - 11:44
Expires: Friday, November 22, 2024 - 20:00
Urgency: Expected
Severity: Minor
Sender: NWS San Francisco CA