Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 217, NWS Lubbock, TX

August 29, 2020Childress County, Hall County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Aug 29, 2020, 10:25 PM CDT for Childress County, Hall 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
Aug 29, 2020, 10:25 PM CDT (03:25 UTC)
Expired
Aug 29, 2020, 11:30 PM CDT
In force
65 min
Issued by
NWS Lubbock, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

Counties Childress County, TX, Hall County, TX

The radar

The Altus AFB radar (KFDR), 136 km from the middle of the area, began a volume at 03:25 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
Aug 29, 8:34 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.4 hours before the alert went out and 288 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, Norman, OK at 00:00Z on 2020-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2451 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, Norman, OK at 00:00Z on 2020-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939Sfc1 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
2451 J/kg
Mixed-layer CIN
-114 J/kg
Mixed-layer LCL
1167 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Lubbock, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 9:42 PM CDTSevere Thunderstorm WarningLUBBriscoe, Hall, Swisher63 min
Aug 29, 10:00 PM CDTSevere Thunderstorm WarningLUBBriscoe, Floyd, Hale, Hall, Motley, Swisher60 min
Aug 29, 10:47 PM CDTSevere Thunderstorm WarningLUBBriscoe, Childress, Cottle, Hall, Motley58 min
Aug 29, 11:29 PM CDTSevere Thunderstorm WarningLUBChildress, Cottle, Hall, Motley61 min
Aug 29, 11:55 PM CDTSevere Thunderstorm WarningLUBBriscoe, Childress, Cottle, Hall, Motley50 min
Aug 30, 12:40 AM CDTSpecial Weather StatementLUBChildress35 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Every 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.