Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 221, NWS Fort Worth, TX

September 18, 2001Dallas County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Sep 18, 2001, 7:23 PM CDT for Dallas County, Texas. It was in force for 52 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Sep 18, 2001, 7:23 PM CDT (00:23 UTC)
Expired: Sep 18, 2001, 8:15 PM CDT
In force: 52 min
Issued by: NWS Fort Worth, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Dallas County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 54 km from the middle of the area, began a volume at 00:24 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 was reported inside it

Time	Report	Where	Remark
Sep 18, 7:50 PM CDT	Thunderstorm Wind 52 E	Duncanville, TX	Power lines were blown down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 18, 4:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.4 hours before the alert went out and 48 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: 1787 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1487 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 18, 5:50 PM CDT, 1 hour 33 minutes earlier.

Area forecast discussion, Sep 18, 5:50 PM CDT, 1 hour 33 minutes before

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In the hours before

Special weather statement, Sep 18, 4:30 PM CDT, 2 hours 53 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.
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      <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 Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 18, 8:01 PM CDT	Severe Thunderstorm Warning	FWD	Kaufman, Rockwall	59 min
Sep 18, 8:32 PM CDT	Severe Thunderstorm Warning	FWD	Van Zandt	88 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.