Alert archive / Texas / Flash Flood Warnings in 2020

Flash Flood Warning 28, NWS Houston/Galveston, TX

September 22, 2020Harris County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Sep 22, 2020, 12:31 PM CDT for Harris County, Texas. It was in force for 10 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, 12:31 PM CDT (17:31 UTC)
Expired: Sep 22, 2020, 11:00 PM CDT
In force: 10 hr
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Flood severity: None

County Harris County, TX

The radar

The Houston radar (KHGX), 52 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 35 minutes earlier.

Area forecast discussion, Sep 22, 3:56 AM CDT, 8 hours 35 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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In the hours before

Local storm report, Sep 22, 7:19 AM CDT, 5 hours 12 minutes before

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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.
      </p>
    </section>
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Local storm report, Sep 22, 7:21 AM CDT, 5 hours 10 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>
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Local storm report, Sep 22, 7:24 AM CDT, 5 hours 7 minutes before

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<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, Sep 22, 7:28 AM CDT, 5 hours 3 minutes before

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<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, Sep 22, 12:11 PM CDT, 20 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, Sep 22, 12:21 PM CDT, 10 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.

Issued	Product	Office	Counties	Lasted
Sep 21, 7:08 PM CDT	Flash Flood Warning	HGX	Brazoria, Galveston, Harris	82 min
Sep 21, 7:59 PM CDT	Areal Flood Advisory	HGX	Brazoria, Fort Bend, Harris	2 hr
Sep 21, 8:27 PM CDT	Flash Flood Warning	HGX	Brazoria, Fort Bend, Galveston, Harris	3 hr
Sep 21, 8:48 PM CDT	River Flood Warning	HGX	Harris	16 hr
Sep 21, 8:49 PM CDT	River Flood Warning	HGX	Harris	11 hr
Sep 21, 8:52 PM CDT	River Flood Warning	HGX	Galveston, Harris	46 hr
Sep 21, 9:24 PM CDT	Areal Flood Advisory	HGX	Brazoria, Fort Bend, Matagorda, Wharton	3 hr
Sep 21, 9:41 PM CDT	River Flood Warning	HGX	Harris	10 hr
Sep 21, 9:51 PM CDT	Flash Flood Warning	HGX	Brazoria, Matagorda, Wharton	3 hr
Sep 21, 10:46 PM CDT	Areal Flood Advisory	HGX	Jackson, Matagorda, Wharton	119 min
Sep 21, 11:17 PM CDT	River Flood Warning	HGX	Galveston, Harris	57 hr
Sep 21, 11:33 PM CDT	Flash Flood Warning	HGX	Brazoria, Fort Bend, Harris	3 hr
Sep 22, 12:24 AM CDT	Flash Flood Warning	HGX	Colorado, Jackson, Wharton	111 min
Sep 22, 1:18 AM CDT	Coastal Flood Warning	HGX	Brazoria, Chambers, Galveston, Harris, Jackson, Matagorda	35 hr
Sep 22, 1:56 AM CDT	Flash Flood Warning	HGX	Jackson	3 hr
Sep 22, 2:06 AM CDT	River Flood Warning	HGX	Matagorda, Wharton	41 hr
Sep 22, 2:07 AM CDT	River Flood Warning	HGX	Jackson, Wharton	10 hr
Sep 22, 2:25 AM CDT	Flash Flood Warning	HGX	Brazoria, Fort Bend, Harris	3 hr
Sep 22, 3:09 AM CDT	River Flood Warning	HGX	Galveston, Harris	37 hr
Sep 22, 3:21 AM CDT	Areal Flood Warning	HGX	Harris	3 hr
Sep 22, 3:57 AM CDT	River Flood Warning	HGX	Brazoria, Harris	27 hr
Sep 22, 4:22 AM CDT	River Flood Warning	HGX	Brazoria, Harris	23 hr
Sep 22, 5:12 AM CDT	River Flood Warning	HGX	Harris	9 hr
Sep 22, 5:27 AM CDT	Flash Flood Warning	HGX	Brazoria, Fort Bend, Harris	3 hr
Sep 22, 6:32 AM CDT	River Flood Warning	HGX	Harris	20 hr
Sep 22, 7:30 AM CDT	River Flood Warning	HGX	Harris	7 hr
Sep 22, 8:29 AM CDT	Flash Flood Warning	HGX	Brazoria, Fort Bend, Galveston, Harris	4 hr
Sep 22, 9:03 AM CDT	Areal Flood Advisory	HGX	Brazoria, Fort Bend, Galveston, Harris, Montgomery, Waller	4 hr
Sep 22, 9:30 AM CDT	River Flood Warning	HGX	Harris	7 hr
Sep 22, 10:16 AM CDT	Small Craft Advisory	HGX		32 hr
Sep 22, 10:19 AM CDT	Flash Flood Warning	HGX	Harris	2 hr
Sep 22, 10:22 AM CDT	River Flood Warning	HGX	Brazoria, Fort Bend, Wharton	6 days
Sep 22, 10:39 AM CDT	Rip Current Statement	HGX	Brazoria, Galveston, Matagorda	20 hr
Sep 22, 12:36 PM CDT	Flash Flood Warning	HGX	Brazoria, Fort Bend, Galveston, Harris	4 hr
Sep 22, 12:55 PM CDT	River Flood Warning	HGX	Brazoria, Harris	24 hr
Sep 22, 4:31 PM CDT	Areal Flood Advisory	HGX	Brazoria, Fort Bend, Galveston, Harris	2 hr
Sep 22, 6:58 PM CDT	Areal Flood Advisory	HGX	Harris, Waller	51 min

Nearby

Flash Flood Warnings in Texas, 2020 Every 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.