Alert archive / California / Frost Advisories in 2024

Frost Advisory 28, NWS San Francisco Bay Area, CA

December 14, 20248 counties in California

NWS San Francisco Bay Area, CA issued this frost advisory at Dec 14, 2024, 11:02 AM PST for 8 counties in California. It took effect at Dec 15, 2024, 12:00 AM PST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Dec 14, 2024, 11:02 AM PST (19:02 UTC)
In effect from: Dec 15, 2024, 12:00 AM PST
Expired: Dec 15, 2024, 9:00 AM PST
In force: 9 hr
Issued by: NWS San Francisco Bay Area, CA

Counties Alameda County, CA, Contra Costa County, CA, Marin County, CA, Monterey County, CA, Napa County, CA, San Benito County, CA, Santa Clara County, CA, Sonoma County, CA

The radar

The San Francisco radar (KMUX), 49 km from the middle of the area, began a volume at 19:02 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 frost advisory 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 frost advisory went out at Dec 14, 10:15 AM PST, 47 minutes earlier.

Area forecast discussion, Dec 14, 10:15 AM PST, 47 minutes before

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In the hours before

Local storm report, Dec 14, 10:09 AM PST, 53 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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    </section>
  </main>
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Local storm report, Dec 14, 10:40 AM PST, 22 minutes before

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<head>
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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 14, 10:51 AM PST, 11 minutes before

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<head>
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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 14, 10:53 AM PST, 9 minutes before

<!doctype html>
<html lang="en">
<head>
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  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
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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 14, 10:56 AM PST, 6 minutes before

<!doctype html>
<html lang="en">
<head>
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  <meta name="viewport" content="width=device-width, initial-scale=1">
  <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>

Local storm report, Dec 14, 11:01 AM PST, 1 minute before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <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 13, 11:24 PM PST	Areal Flood Advisory	MTR	Marin, Sonoma	3 hr
Dec 14, 12:56 AM PST	Areal Flood Advisory	MTR	Sonoma	7 hr
Dec 14, 1:38 AM PST	Areal Flood Advisory	MTR	Alameda, Contra Costa	3 hr
Dec 14, 3:20 AM PST	Special Marine Warning	MTR		40 min
Dec 14, 4:01 AM PST	Special Marine Warning	MTR		29 min
Dec 14, 4:45 AM PST	Areal Flood Advisory	MTR	Marin, Sonoma	3 hr
Dec 14, 4:51 AM PST	Areal Flood Advisory	MTR	City and County of San Francisco	3 hr
Dec 14, 5:04 AM PST	Areal Flood Advisory	MTR	Alameda, Contra Costa	3 hr
Dec 14, 5:18 AM PST	Areal Flood Advisory	MTR	Santa Clara, Santa Cruz	3 hr
Dec 14, 5:36 AM PST	Special Marine Warning	MTR		24 min
Dec 14, 5:45 AM PST	Special Marine Warning	MTR		30 min
Dec 14, 5:51 AM PST	Tornado Warning	MTR	City and County of San Francisco, San Mateo	24 min
Dec 14, 6:06 AM PST	Special Marine Warning	MTR		24 min
Dec 14, 7:05 AM PST	Areal Flood Advisory	MTR	San Mateo	55 min
Dec 14, 7:13 AM PST	Special Weather Statement	MTR	Monterey	32 min
Dec 14, 7:56 AM PST	Areal Flood Advisory	MTR	Sonoma	44 hr
Dec 14, 8:23 AM PST	Areal Flood Advisory	MTR	Sonoma	17 hr
Dec 14, 8:32 AM PST	Areal Flood Advisory	MTR	Sonoma	11 hr
Dec 14, 8:37 AM PST	Small Craft Advisory	MTR		48 hr
Dec 14, 12:42 PM PST	Special Marine Warning	MTR		33 min
Dec 14, 1:07 PM PST	Special Weather Statement	MTR	Santa Cruz	23 min
Dec 14, 1:25 PM PST	Severe Thunderstorm Warning	MTR	Santa Cruz	23 min

Nearby

Frost Advisories in California, 2024 Every frost advisory in 2024

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.