Alert archive / California / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 16, NWS San Francisco Bay Area, CA

December 24, 2025San Mateo County, Santa Clara County, Santa Cruz County, California

NWS San Francisco Bay Area, CA issued this severe thunderstorm warning at Dec 24, 2025, 2:43 AM PST for San Mateo County, Santa Clara County, Santa Cruz County, California. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 24, 2025, 2:43 AM PST (10:43 UTC)
Expired: Dec 24, 2025, 3:15 AM PST
In force: 32 min
Issued by: NWS San Francisco Bay Area, CA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA

The radar

The San Francisco radar (KMUX), 14 km from the middle of the area, began a volume at 10:47 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 24, 2:10 AM PST, 33 minutes earlier.

Area forecast discussion, Dec 24, 2:10 AM PST, 33 minutes before

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In the hours before

Local storm report, Dec 24, 2:07 AM PST, 36 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Local storm report, Dec 24, 2:12 AM PST, 31 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Dec 24, 2:13 AM PST, 30 minutes before

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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
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Local storm report, Dec 24, 2:15 AM PST, 28 minutes before

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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Dec 24, 2:25 AM PST, 18 minutes before

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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Local storm report, Dec 24, 2:26 AM PST, 17 minutes before

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<head>
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  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 24, 12:14 AM PST	Special Marine Warning	MTR		21 min
Dec 24, 12:20 AM PST	Special Marine Warning	MTR		16 min
Dec 24, 12:58 AM PST	Special Marine Warning	MTR		47 min
Dec 24, 1:17 AM PST	Special Marine Warning	MTR		43 min
Dec 24, 1:23 AM PST	Special Marine Warning	MTR		37 min
Dec 24, 1:53 AM PST	Special Marine Warning	MTR		52 min
Dec 24, 2:39 AM PST	Areal Flood Advisory	MTR	San Mateo, Santa Cruz	4 hr
Dec 24, 3:04 AM PST	Severe Thunderstorm Warning	MTR	Alameda, Santa Clara	22 min
Dec 24, 3:08 AM PST	Special Marine Warning	MTR		31 min
Dec 24, 3:18 AM PST	Areal Flood Advisory	MTR	Alameda, Contra Costa	3 hr
Dec 24, 3:23 AM PST	Special Marine Warning	MTR		37 min
Dec 24, 3:40 AM PST	Special Marine Warning	MTR		35 min
Dec 24, 4:08 AM PST	Areal Flood Advisory	MTR	Monterey	3 hr
Dec 24, 4:29 AM PST	Gale Warning	MTR		47 hr
Dec 24, 4:29 AM PST	Small Craft Advisory	MTR		11 hr
Dec 24, 4:29 AM PST	Storm Warning	MTR		28 hr
Dec 24, 5:08 AM PST	High Wind Warning	MTR	Marin, Monterey, San Benito, City and County of San Francisco, San Mateo, Santa Cruz and 1 more	29 hr
Dec 24, 5:08 AM PST	Wind Advisory	MTR	Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more	29 hr
Dec 24, 7:45 AM PST	Special Weather Statement	MTR	San Benito	45 min

Nearby

Severe Thunderstorm Warnings in California, 2025 Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.