Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Houston/Galveston, TX

July 6, 2021Matagorda County, Texas

NWS Houston/Galveston, TX issued this special weather statement at Jul 6, 2021, 6:04 AM CDT for Matagorda County, Texas. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 6, 2021, 6:04 AM CDT (11:04 UTC)
Expired: Jul 6, 2021, 6:45 AM CDT
In force: 41 min
Issued by: NWS Houston/Galveston, TX

County Matagorda County, TX

The radar

The Houston radar (KHGX), 92 km from the middle of the area, began a volume at 11:04 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.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 11.1 hours before the alert went out and 205 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1645 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 950 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 6, 5:17 AM CDT, 47 minutes earlier.

Area forecast discussion, Jul 6, 5:17 AM CDT, 47 minutes before

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In the hours before

Special weather statement, Jul 6, 6:04 AM CDT, 0 minutes before

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<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.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 6, 5:08 AM CDT	Areal Flood Advisory	HGX	Brazoria, Matagorda, Wharton	5 hr
Jul 6, 9:07 AM CDT	River Flood Warning	HGX	Matagorda, Wharton	6 days
Jul 6, 10:22 AM CDT	Special Marine Warning	HGX		38 min
Jul 6, 2:40 PM CDT	Flash Flood Watch	HGX	Austin, Brazoria, Colorado, Fort Bend, Galveston, Jackson and 3 more	3 days
Jul 6, 3:59 PM CDT	Special Weather Statement	HGX	Houston	46 min
Jul 6, 4:10 PM CDT	Severe Thunderstorm Warning	HGX	Houston, Trinity	50 min
Jul 6, 4:23 PM CDT	Special Marine Warning	HGX		67 min
Jul 6, 4:35 PM CDT	Special Weather Statement	HGX	Trinity	40 min
Jul 6, 5:02 PM CDT	Special Weather Statement	HGX	Houston	28 min

Nearby

Special Weather Statements in Texas, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.