Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 56, NWS Fort Worth, TX

April 19, 2020Delta County, Lamar County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 19, 2020, 3:42 PM CDT for Delta County, Lamar County, Texas. It was in force for 19 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: Apr 19, 2020, 3:42 PM CDT (20:42 UTC)
Expired: Apr 19, 2020, 4:01 PM CDT
In force: 19 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Delta County, TX, Lamar County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 189 km from the middle of the area, began a volume at 20:45 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 12:00Z, 8.7 hours before the alert went out and 174 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: 593 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 621 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 260 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

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 Apr 19, 1:19 PM CDT, 2 hours 23 minutes earlier.

Area forecast discussion, Apr 19, 1:19 PM CDT, 2 hours 23 minutes before

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Hazardous weather outlook, Apr 19, 12:28 PM CDT, 3 hours 14 minutes before

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In the hours before

Local storm report, Apr 19, 11:09 AM CDT, 4 hours 33 minutes before

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Local storm report, Apr 19, 12:30 PM CDT, 3 hours 12 minutes before

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Special weather statement, Apr 19, 2:14 PM CDT, 1 hour 28 minutes before

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Local storm report, Apr 19, 2:41 PM CDT, 1 hour 1 minute before

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Local storm report, Apr 19, 3:21 PM CDT, 21 minutes before

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Special weather statement, Apr 19, 3:34 PM CDT, 8 minutes before

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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
Apr 19, 3:17 AM CDT	Dense Fog Advisory	FWD	Anderson, Bell, Coryell, Falls, Freestone, Hamilton and 9 more	6 hr
Apr 19, 7:04 AM CDT	Special Weather Statement	FWD	Coryell	26 min
Apr 19, 7:35 AM CDT	Special Weather Statement	FWD	McLennan	25 min
Apr 19, 7:42 AM CDT	Severe Thunderstorm Warning	FWD	McLennan	63 min
Apr 19, 8:20 AM CDT	Severe Thunderstorm Warning	FWD	Freestone, Limestone	55 min
Apr 19, 9:16 AM CDT	Severe Thunderstorm Warning	FWD	Anderson, Freestone, Limestone	59 min
Apr 19, 10:05 AM CDT	Severe Thunderstorm Warning	FWD	Anderson	40 min
Apr 19, 10:12 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Tarrant	63 min
Apr 19, 10:14 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Rockwall, Tarrant	61 min
Apr 19, 10:53 AM CDT	Severe Thunderstorm Warning	FWD	Kaufman, Van Zandt	67 min
Apr 19, 11:19 AM CDT	Severe Thunderstorm Warning	FWD	Anderson	56 min
Apr 19, 11:40 AM CDT	Severe Thunderstorm Warning	FWD	Hunt, Kaufman, Rains, Rockwall, Van Zandt	65 min
Apr 19, 12:12 PM CDT	Severe Thunderstorm Warning	FWD	Van Zandt	48 min
Apr 19, 2:14 PM CDT	Special Weather Statement	FWD	Lamar	31 min
Apr 19, 2:20 PM CDT	Severe Thunderstorm Warning	FWD	Lamar	40 min
Apr 19, 3:34 PM CDT	Special Weather Statement	FWD	Lamar	26 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.