Alert archive / Texas / Flash Flood Warnings in 2020

Flash Flood Warning 29, NWS Houston/Galveston, TX

September 22, 20204 counties in Texas

NWS Houston/Galveston, TX issued this flash flood warning at Sep 22, 2020, 12:36 PM CDT for 4 counties in Texas. It was in force for 4 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 22, 2020, 12:36 PM CDT (17:36 UTC)
Expired
Sep 22, 2020, 4:45 PM CDT
In force
4 hr
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Flood severity
None

Counties Brazoria County, TX, Fort Bend County, TX, Galveston County, TX, Harris County, TX

The radar

The Houston radar (KHGX), 26 km from the middle of the area, began a volume at 17:35 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 Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 22, 3:56 AM CDT, 8 hours 40 minutes earlier.

Area forecast discussion, Sep 22, 3:56 AM CDT, 8 hours 40 minutes before
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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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 22, 7:19 AM CDT, 5 hours 17 minutes before
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<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>
Local storm report, Sep 22, 7:21 AM CDT, 5 hours 15 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>
Local storm report, Sep 22, 7:24 AM CDT, 5 hours 12 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>
Local storm report, Sep 22, 7:28 AM CDT, 5 hours 8 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>
Local storm report, Sep 22, 12:11 PM CDT, 25 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>
Local storm report, Sep 22, 12:21 PM CDT, 15 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 Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 21, 7:08 PM CDTFlash Flood WarningHGXBrazoria, Galveston, Harris82 min
Sep 21, 7:59 PM CDTAreal Flood AdvisoryHGXBrazoria, Fort Bend, Harris2 hr
Sep 21, 8:27 PM CDTFlash Flood WarningHGXBrazoria, Fort Bend, Galveston, Harris3 hr
Sep 21, 8:48 PM CDTRiver Flood WarningHGXHarris16 hr
Sep 21, 8:49 PM CDTRiver Flood WarningHGXHarris11 hr
Sep 21, 8:52 PM CDTRiver Flood WarningHGXGalveston, Harris46 hr
Sep 21, 9:24 PM CDTAreal Flood AdvisoryHGXBrazoria, Fort Bend, Matagorda, Wharton3 hr
Sep 21, 9:41 PM CDTRiver Flood WarningHGXHarris10 hr
Sep 21, 9:51 PM CDTFlash Flood WarningHGXBrazoria, Matagorda, Wharton3 hr
Sep 21, 10:46 PM CDTAreal Flood AdvisoryHGXJackson, Matagorda, Wharton119 min
Sep 21, 11:17 PM CDTRiver Flood WarningHGXGalveston, Harris57 hr
Sep 21, 11:33 PM CDTFlash Flood WarningHGXBrazoria, Fort Bend, Harris3 hr
Sep 22, 12:24 AM CDTFlash Flood WarningHGXColorado, Jackson, Wharton111 min
Sep 22, 1:18 AM CDTCoastal Flood WarningHGXBrazoria, Chambers, Galveston, Harris, Jackson, Matagorda35 hr
Sep 22, 1:56 AM CDTFlash Flood WarningHGXJackson3 hr
Sep 22, 2:06 AM CDTRiver Flood WarningHGXMatagorda, Wharton41 hr
Sep 22, 2:07 AM CDTRiver Flood WarningHGXJackson, Wharton10 hr
Sep 22, 2:25 AM CDTFlash Flood WarningHGXBrazoria, Fort Bend, Harris3 hr
Sep 22, 3:09 AM CDTRiver Flood WarningHGXGalveston, Harris37 hr
Sep 22, 3:21 AM CDTAreal Flood WarningHGXHarris3 hr
Sep 22, 3:57 AM CDTRiver Flood WarningHGXBrazoria, Harris27 hr
Sep 22, 4:22 AM CDTRiver Flood WarningHGXBrazoria, Harris23 hr
Sep 22, 5:12 AM CDTRiver Flood WarningHGXHarris9 hr
Sep 22, 5:27 AM CDTFlash Flood WarningHGXBrazoria, Fort Bend, Harris3 hr
Sep 22, 6:32 AM CDTRiver Flood WarningHGXHarris20 hr
Sep 22, 7:30 AM CDTRiver Flood WarningHGXHarris7 hr
Sep 22, 8:29 AM CDTFlash Flood WarningHGXBrazoria, Fort Bend, Galveston, Harris4 hr
Sep 22, 9:03 AM CDTAreal Flood AdvisoryHGXBrazoria, Fort Bend, Galveston, Harris, Montgomery, Waller4 hr
Sep 22, 9:30 AM CDTRiver Flood WarningHGXHarris7 hr
Sep 22, 10:16 AM CDTSmall Craft AdvisoryHGX32 hr
Sep 22, 10:19 AM CDTFlash Flood WarningHGXHarris2 hr
Sep 22, 10:22 AM CDTRiver Flood WarningHGXBrazoria, Fort Bend, Wharton6 days
Sep 22, 10:39 AM CDTRip Current StatementHGXBrazoria, Galveston, Matagorda20 hr
Sep 22, 12:31 PM CDTFlash Flood WarningHGXHarris10 hr
Sep 22, 12:55 PM CDTRiver Flood WarningHGXBrazoria, Harris24 hr
Sep 22, 4:31 PM CDTAreal Flood AdvisoryHGXBrazoria, Fort Bend, Galveston, Harris2 hr
Sep 22, 6:58 PM CDTAreal Flood AdvisoryHGXHarris, Waller51 min

Nearby

Flash Flood Warnings in Texas, 2020Every flash flood 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.