Alert archive / California / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 7, NWS Hanford, CA

August 17, 2020Mariposa County, Tuolumne County, California

NWS Hanford, CA issued this severe thunderstorm warning at Aug 17, 2020, 6:11 PM PDT for Mariposa County, Tuolumne County, California. It was in force for 34 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: Aug 17, 2020, 6:11 PM PDT (01:11 UTC)
Expired: Aug 17, 2020, 6:45 PM PDT
In force: 34 min
Issued by: NWS Hanford, CA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Mariposa County, CA, Tuolumne County, CA

The radar

The San Joaquin Valley radar (KHNX), 168 km from the middle of the area, began a volume at 01:12 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 Hanford, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 4:37 PM PDT, 1 hour 34 minutes earlier.

Area forecast discussion, Aug 17, 4:37 PM PDT, 1 hour 34 minutes before

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In the hours before

Special weather statement, Aug 17, 4:09 PM PDT, 2 hours 2 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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Special weather statement, Aug 17, 4:12 PM PDT, 1 hour 59 minutes before

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<head>
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  <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.
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Special weather statement, Aug 17, 5:48 PM PDT, 23 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>
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</body>
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The office that day

Everything else NWS Hanford, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 17, 5:05 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Madera, Mariposa, Tuolumne	55 min
Aug 17, 5:48 PM PDT	Special Weather Statement	HNX	Mono	57 min
Aug 18, 12:30 PM PDT	Flash Flood Watch	HNX		7 hr
Aug 18, 3:13 PM PDT	Special Weather Statement	HNX		47 min
Aug 18, 3:35 PM PDT	Special Weather Statement	HNX		40 min
Aug 18, 3:38 PM PDT	Flash Flood Warning	HNX	Tulare	92 min
Aug 18, 3:48 PM PDT	Areal Flood Advisory	HNX	Kern	38 min
Aug 18, 3:57 PM PDT	Areal Flood Advisory	HNX	Kern	94 min
Aug 18, 4:14 PM PDT	Special Weather Statement	HNX		31 min
Aug 18, 4:21 PM PDT	Flash Flood Warning	HNX	Kern	114 min
Aug 18, 4:32 PM PDT	Special Weather Statement	HNX	Kern	28 min
Aug 18, 4:44 PM PDT	Special Weather Statement	HNX		31 min
Aug 18, 4:55 PM PDT	Special Weather Statement	HNX	Tulare	50 min

Nearby

Severe Thunderstorm Warnings in California, 2020 Every severe thunderstorm warning in 2020

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.