Contra Costa County Resident Portal

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Public Safety Alerts

Headline: Dense Fog Advisory issued December 19 at 5:37AM PST until December 19 at 12:00PM PST by NWS San Francisco CA
Description: * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...The Santa Clara Valley, San Francisco, North Bay Interior Valleys, San Francisco Bay Shoreline, and East Bay Interior Valleys. * WHEN...Until noon PST today. * IMPACTS...Low... more
Effective: Thursday, December 19, 2024 - 05:37
Expires: Thursday, December 19, 2024 - 12:00
Urgency: Expected
Severity: Moderate
Sender: NWS San Francisco CA
Headline: Dense Fog Advisory issued December 18 at 9:25PM PST until December 19 at 12:00PM PST by NWS San Francisco CA
Description: * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...The Santa Clara Valley, San Francisco, North Bay Interior Valleys, San Francisco Bay Shoreline, and East Bay Interior Valleys. * WHEN...Until noon PST Thursday. * IMPACTS...Low... more
Effective: Wednesday, December 18, 2024 - 21:25
Expires: Thursday, December 19, 2024 - 06:30
Urgency: Expected
Severity: Moderate
Sender: NWS San Francisco CA
Headline: Dense Fog Advisory issued December 18 at 9:29AM PST until December 18 at 1:00PM PST by NWS San Francisco CA
Description: * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...The Santa Clara Valley, San Francisco, North Bay Interior Valleys, San Francisco Bay Shoreline, and East Bay Interior Valleys. * WHEN...Until 1 PM PST this afternoon. * IMPACTS... more
Effective: Wednesday, December 18, 2024 - 09:29
Expires: Wednesday, December 18, 2024 - 13:00
Urgency: Expected
Severity: Moderate
Sender: NWS San Francisco CA
Headline: Dense Fog Advisory issued December 18 at 7:27AM PST until December 18 at 11:00AM PST by NWS San Francisco CA
Description: * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...The Marin Hills, Western Sonoma County Hills, The Santa Clara Valley, San Francisco, Coastal North Bay Including Point Reyes National Seashore, North Bay Interior Valleys, San... more
Effective: Wednesday, December 18, 2024 - 07:27
Expires: Wednesday, December 18, 2024 - 11:00
Urgency: Expected
Severity: Moderate
Sender: NWS San Francisco CA
Headline: Dense Fog Advisory issued December 18 at 1:36AM PST until December 18 at 9:00AM PST by NWS San Francisco CA
Description: * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...The Marin Hills, Western Sonoma County Hills, Coastal North Bay Including Point Reyes National Seashore, North Bay Interior Valleys, San Francisco Bay Shoreline, and East Bay... more
Effective: Wednesday, December 18, 2024 - 01:36
Expires: Wednesday, December 18, 2024 - 09:00
Urgency: Expected
Severity: Moderate
Sender: NWS San Francisco CA