Alert archive / Texas / Heat Advisories in 2021

Heat Advisory 5, NWS Houston/Galveston, TX

August 11, 202123 counties in Texas

NWS Houston/Galveston, TX issued this heat advisory at Aug 11, 2021, 4:33 AM CDT for 23 counties in Texas. It took effect at Aug 11, 2021, 8:00 AM CDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Aug 11, 2021, 4:33 AM CDT (09:33 UTC)
In effect from: Aug 11, 2021, 8:00 AM CDT
Expired: Aug 11, 2021, 8:00 PM CDT
In force: 12 hr
Issued by: NWS Houston/Galveston, TX

All 23 counties

Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Harris County, TX, Houston County, TX, Jackson County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 91 km from the middle of the area, began a volume at 09:35 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 heat advisory 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 heat advisory went out at Aug 10, 11:51 PM CDT, 4 hours 42 minutes earlier.

Area forecast discussion, Aug 10, 11:51 PM CDT, 4 hours 42 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
Aug 11, 2:30 PM CDT	Special Weather Statement	HGX	Liberty	45 min
Aug 11, 3:04 PM CDT	Special Weather Statement	HGX	Harris	41 min
Aug 11, 3:18 PM CDT	Severe Thunderstorm Warning	HGX	Harris, Montgomery	27 min
Aug 11, 3:43 PM CDT	Areal Flood Advisory	HGX	Harris	3 hr
Aug 11, 3:47 PM CDT	Special Weather Statement	HGX	Waller	43 min
Aug 11, 3:57 PM CDT	Special Weather Statement	HGX	Fort Bend	48 min
Aug 11, 4:28 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery, Walker	32 min

Nearby

Heat Advisories in Texas, 2021 Every heat advisory in 2021

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.