Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 201, NWS Fort Worth, TX

September 27, 20205 counties in Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Sep 27, 2020, 11:14 PM CDT for 5 counties in Texas. It was in force for 61 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: Sep 27, 2020, 11:14 PM CDT (04:14 UTC)
Expired: Sep 28, 2020, 12:15 AM CDT
In force: 61 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Delta County, TX, Fannin County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 167 km from the middle of the area, began a volume at 04:16 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

Fort Worth, TX (KFWD), launched 00:00Z, 4.2 hours before the alert went out and 152 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: 2643 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1322 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 17.2

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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 27, 2:49 PM CDT, 8 hours 25 minutes earlier.

Area forecast discussion, Sep 27, 2:49 PM CDT, 8 hours 25 minutes before

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Hazardous weather outlook, Sep 27, 2:32 PM CDT, 8 hours 42 minutes before

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    <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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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 27, 10:03 PM CDT	Special Weather Statement	FWD	Lamar	42 min
Sep 27, 10:13 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Fannin, Lamar	62 min
Sep 28, 12:14 AM CDT	Special Weather Statement	FWD	Hopkins, Hunt, Rains	46 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020 Every severe thunderstorm warning in 2020

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.