Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 224, NWS Shreveport, LA

June 11, 2009Angelina County, Cherokee County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Jun 11, 2009, 6:40 AM CDT for Angelina County, Cherokee County, Texas. It was in force for 65 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
Jun 11, 2009, 6:40 AM CDT (11:40 UTC)
Expired
Jun 11, 2009, 7:45 AM CDT
In force
65 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon

Counties Angelina County, TX, Cherokee County, TX

The radar

The Shreveport radar (KSHV), 141 km from the middle of the area, began a volume at 11:41 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 11, 3:11 AM CDTSevere Thunderstorm WatchSPC7 hr
Jun 11, 5:42 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 11.7 hours before the alert went out and 149 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2009-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1677 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2009-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1677 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1341 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.7

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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 11, 6:02 AM CDT, 38 minutes earlier.

Area forecast discussion, Jun 11, 6:02 AM CDT, 38 minutes before
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Hazardous weather outlook, Jun 11, 5:53 AM CDT, 47 minutes before
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In the hours before

Local storm report, Jun 11, 1:37 AM CDT, 5 hours 3 minutes before
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      <div class="status" id="status">Temporary Notice</div>
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Special weather statement, Jun 11, 4:47 AM CDT, 1 hour 53 minutes before
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<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>
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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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Local storm report, Jun 11, 5:10 AM CDT, 1 hour 30 minutes before
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<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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      <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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The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 10, 8:40 PM CDTSevere Thunderstorm WarningSHVCherokee, Gregg, Rusk, Smith, Upshur, Wood65 min
Jun 10, 8:59 PM CDTSevere Thunderstorm WarningSHVCamp, Franklin, Morris, Red River, Titus61 min
Jun 10, 9:10 PM CDTTornado WarningSHVSmith, Wood50 min
Jun 10, 9:12 PM CDTTornado WarningSHVCamp, Franklin, Titus48 min
Jun 10, 9:16 PM CDTTornado WarningSHVRed River44 min
Jun 10, 9:42 PM CDTSevere Thunderstorm WarningSHVCherokee, Gregg, Harrison, Marion, Rusk, Smith and 2 more63 min
Jun 10, 9:55 PM CDTSevere Thunderstorm WarningSHVBowie, Camp, Cass, Morris, Red River, Titus and 1 more50 min
Jun 10, 9:55 PM CDTTornado WarningSHVCass, Morris50 min
Jun 10, 10:20 PM CDTSevere Thunderstorm WarningSHVBowie, Cass, Gregg, Harrison, Marion, Panola and 1 more55 min
Jun 10, 10:25 PM CDTSevere Thunderstorm WarningSHVCherokee, Nacogdoches, Panola, Rusk, Smith65 min
Jun 10, 10:33 PM CDTSevere Thunderstorm WarningSHVBowie, Cass49 min
Jun 10, 10:50 PM CDTSevere Thunderstorm WarningSHVHarrison, Marion, Panola55 min
Jun 11, 5:09 AM CDTSevere Thunderstorm WarningSHVCherokee, Rusk, Smith51 min
Jun 11, 6:01 AM CDTSevere Thunderstorm WarningSHVCherokee59 min
Jun 10, 11:30 PM CDTSevere Thunderstorm WarningSHVBienville, Bossier, Caddo, Claiborne, De Soto, Red River and 1 more45 min
Jun 10, 11:53 PM CDTSevere Thunderstorm WarningSHVBienville, Bossier, Claiborne, Lincoln, Webster52 min
Jun 11, 12:16 AM CDTSevere Thunderstorm WarningSHVBienville, Claiborne, Jackson, Lincoln, Ouachita, Union and 1 more44 min
Jun 11, 12:54 AM CDTSevere Thunderstorm WarningSHVLincoln, Union36 min
Jun 10, 10:09 PM CDTSevere Thunderstorm WarningSHVLittle River, Sevier51 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009

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.