San Mateo County

Alerts in effect

Alerts covering all or part of San Mateo County.

• Heat Advisorymoderate

  Sonoma Coastal Range; North Bay Interior Mountains; San Francisco Bay Shoreline; East Bay Interior Valleys; Santa Cruz Mountains; Santa Clara Valley Including San Jose; Eastern Santa Clara Hills; East Bay Hills; Southern Salinas Valley/Arroyo Seco and Lake San Antonio; Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park

  NWS San Francisco CA · until Oct 4, 10:00 PM PDT

• Coastal Flood Advisoryminor

  San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast

  NWS San Francisco CA · until Oct 2, 6:00 PM PDT

Outlook for the days ahead

• Severe Thunderstorm Outlook, Day 1: no risk area over San Mateo County until Oct 3, 12:00 PM UTC · Storm Prediction Center
• Excessive Rainfall Outlook, Day 1: no risk area over San Mateo County until Oct 3, 12:00 PM UTC · Weather Prediction Center
• Severe Thunderstorm Outlook, Day 2: no risk area over San Mateo County until Oct 4, 12:00 PM UTC · Storm Prediction Center
• Excessive Rainfall Outlook, Day 2: no risk area over San Mateo County until Oct 4, 12:00 PM UTC · Weather Prediction Center
• Severe Thunderstorm Outlook, Day 3: no risk area over San Mateo County until Oct 5, 12:00 PM UTC · Storm Prediction Center
• Excessive Rainfall Outlook, Day 3: no risk area over San Mateo County until Oct 4, 12:00 PM UTC · Weather Prediction Center
• Excessive Rainfall Outlook, Day 4: no risk area over San Mateo County until Oct 6, 12:00 PM UTC · Weather Prediction Center
• Excessive Rainfall Outlook, Day 5: no risk area over San Mateo County until Oct 7, 12:00 PM UTC · Weather Prediction Center

Rainfall forecast

• Day 1 (24 hours): no measurable rain forecast in San Mateo County issued Oct 2, 5:41 AM UTC · Weather Prediction Center
• Days 1–3 (72 hours): no measurable rain forecast in San Mateo County issued Oct 2, 5:53 AM UTC · Weather Prediction Center
• Days 1–7: no measurable rain forecast in San Mateo County issued Oct 2, 5:54 AM UTC · Weather Prediction Center

River gauges

• Atherton Channel upstream of Caltrain
  NowFlood stages not defined0.07 ftOct 1, 6:12 PM PDT
• Atherton Channel at Las Lomitas School
  NowFlood stages not defined0.12 ftOct 2, 12:00 AM PDT
• Bear Creek (SFJPA) at Sand Hill Road (BCSH)
  NowFlood stages not defined0 ftOct 1, 11:15 PM PDT
• Belmont Creek at Harbor Blvd at Old County Road
  NowNo flooding0.12 ftOct 1, 4:16 PM PDT
• Butano Creek - Cloverdale Road
  NowObservation not current
• Butano Creek near Pescadero
  NowFlood stages not defined3.94 ftOct 2, 12:00 AM PDT
• Colma Creek at South San Francisco
  NowFlood stages not defined0 ftOct 2, 12:04 AM PDT
• El Zanjon Creek at First Avenue
  NowObservation not current