Alert archive / California / Flash Flood Warnings in 2022

Flash Flood Warning 274, NWS Phoenix, AZ

September 10, 2022Imperial County, Riverside County, California

NWS Phoenix, AZ issued this flash flood warning at Sep 10, 2022, 9:11 AM PDT for Imperial County, Riverside County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 10, 2022, 9:11 AM PDT (16:11 UTC)
Expired: Sep 10, 2022, 12:18 PM PDT
In force: 3 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Imperial County, CA, Riverside County, CA

The radar

The San Diego radar (KNKX), 137 km from the middle of the area, began a volume at 16:11 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Phoenix, AZ wrote its last area forecast discussion before this flash flood warning went out at Sep 10, 5:12 AM PDT, 3 hours 59 minutes earlier.

Area forecast discussion, Sep 10, 5:12 AM PDT, 3 hours 59 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.
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        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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In the hours before

Local storm report, Sep 10, 6:44 AM PDT, 2 hours 27 minutes 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 Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 9, 5:01 PM PDT	Flash Flood Warning Considerable damage threat	PSR	La Paz, Maricopa	4 hr
Sep 9, 5:30 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Maricopa	6 hr
Sep 9, 5:37 PM PDT	Dust Storm Advisory	PSR	Maricopa	38 min
Sep 9, 5:43 PM PDT	Special Weather Statement	PSR	Maricopa	47 min
Sep 9, 5:54 PM PDT	Dust Storm Advisory	PSR	Maricopa, Pinal	36 min
Sep 9, 6:00 PM PDT	Special Weather Statement	PSR	La Paz	45 min
Sep 9, 6:30 PM PDT	Special Weather Statement	PSR	Maricopa	45 min
Sep 9, 6:42 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Pinal	4 hr
Sep 9, 6:45 PM PDT	Special Weather Statement	PSR	Maricopa	45 min
Sep 9, 7:32 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Sep 9, 7:59 PM PDT	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Sep 9, 8:41 PM PDT	Special Weather Statement	PSR	Maricopa	49 min
Sep 9, 10:59 PM PDT	Areal Flood Advisory	PSR	Pinal	3 hr
Sep 9, 11:37 PM PDT	Areal Flood Warning	PSR	Maricopa	4 hr
Sep 9, 11:52 PM PDT	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Sep 10, 3:46 AM PDT	Areal Flood Warning	PSR	Maricopa	3 hr
Sep 10, 3:12 PM PDT	Areal Flood Advisory	PSR	Imperial, Riverside	3 hr

Nearby

Flash Flood Warnings in California, 2022 Every flash flood warning in 2022

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.