Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 104, NWS Houston/Galveston, TX

July 28, 2020Brazos County, Burleson County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jul 28, 2020, 3:38 PM CDT for Brazos County, Burleson County, Texas. It was in force for 24 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
Jul 28, 2020, 3:38 PM CDT (20:38 UTC)
Expired
Jul 28, 2020, 4:02 PM CDT
In force
24 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Brazos County, TX, Burleson County, TX

The radar

The Ft Hood radar (KGRK), 90 km from the middle of the area, began a volume at 20:40 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

Corpus Christi, TX (KCRP), launched 12:00Z, 8.6 hours before the alert went out and 328 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, Corpus Christi, TX at 12:00Z on 2020-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2665 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, Corpus Christi, TX at 12:00Z on 2020-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -61 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
2665 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
724 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-61 m²/s²
0-3 km storm-relative helicity
-22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 28, 10:47 AM CDTAreal Flood AdvisoryHGXBrazoria, Chambers, Harris118 min
Jul 28, 1:05 PM CDTAreal Flood AdvisoryHGXBrazoria, Galveston, Matagorda115 min
Jul 28, 2:54 PM CDTAreal Flood AdvisoryHGXJackson, Matagorda111 min
Jul 28, 3:42 PM CDTSpecial Weather StatementHGXWalker48 min
Jul 28, 4:18 PM CDTSpecial Weather StatementHGXBrazos42 min
Jul 28, 4:48 PM CDTSpecial Weather StatementHGXHouston27 min
Jul 28, 5:14 PM CDTSpecial Weather StatementHGXHouston, Trinity46 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.