Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 97, NWS Houston/Galveston, TX

May 14, 2007Trinity County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 14, 2007, 6:20 PM CDT for Trinity County, Texas. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 14, 2007, 6:20 PM CDT (23:20 UTC)
Expired: May 14, 2007, 6:43 PM CDT
In force: 23 min
Issued by: NWS Houston/Galveston, TX
Area: Counties, with a storm outline in the text

County Trinity County, TX

The radar

The Houston radar (KHGX), 180 km from the middle of the area, began a volume at 23:21 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.3 hours before the alert went out and 214 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: 614 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1552 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 14, 3:15 PM CDT, 3 hours 5 minutes earlier.

Area forecast discussion, May 14, 3:15 PM CDT, 3 hours 5 minutes before

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Hazardous weather outlook, May 14, 3:50 PM CDT, 2 hours 30 minutes before

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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.
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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
May 14, 3:10 PM CDT	Severe Thunderstorm Warning	HGX	Chambers	35 min
May 14, 3:28 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Galveston	47 min
May 14, 3:44 PM CDT	Severe Thunderstorm Warning	HGX	Harris	45 min
May 14, 5:01 PM CDT	Severe Thunderstorm Warning	HGX	Harris	21 min
May 14, 5:05 PM CDT	Severe Thunderstorm Warning	HGX	Harris	40 min
May 14, 5:15 PM CDT	Severe Thunderstorm Warning	HGX	Harris, Montgomery	45 min
May 14, 5:18 PM CDT	Severe Thunderstorm Warning	HGX	Liberty	42 min
May 14, 5:32 PM CDT	Severe Thunderstorm Warning	HGX	Polk, Trinity	43 min
May 14, 5:40 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery	50 min
May 14, 5:51 PM CDT	Severe Thunderstorm Warning	HGX	Polk	39 min
May 14, 6:30 PM CDT	Severe Thunderstorm Warning	HGX	San Jacinto	45 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every severe thunderstorm warning in 2007

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.