Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 52, NWS Houston/Galveston, TX

April 28, 2020Austin County, Fort Bend County, Wharton County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 28, 2020, 11:40 AM CDT for Austin County, Fort Bend County, Wharton County, Texas. It was in force for 35 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 28, 2020, 11:40 AM CDT (16:40 UTC)
Expired: Apr 28, 2020, 12:15 PM CDT
In force: 35 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Austin County, TX, Fort Bend County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 98 km from the middle of the area, began a volume at 16:42 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, 4.7 hours before the alert went out and 238 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: 2305 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 723 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.9

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 Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 28, 5:22 AM CDT, 6 hours 18 minutes earlier.

Area forecast discussion, Apr 28, 5:22 AM CDT, 6 hours 18 minutes before

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In the hours before

Special weather statement, Apr 28, 11:34 AM CDT, 6 minutes before

Special Weather Statement
National Weather Service Houston/Galveston TX
1134 AM CDT Tue Apr 28 2020

TXZ211-226-227-281715-
Wharton TX-Fort Bend TX-Austin TX-
1134 AM CDT Tue Apr 28 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WHARTON...
SOUTHEASTERN AUSTIN AND WEST CENTRAL FORT BEND COUNTIES UNTIL 1215 PM
CDT...

At 1131 AM CDT, Doppler radar was tracking a strong thunderstorm near
East Bernard, or 11 miles north of Wharton, moving northeast at 15
mph.

Winds in excess of 40 mph and pea size hail will be possible with
this storm.

Locations impacted include...
Western Rosenberg, East Bernard, Wallis, Pleak, Simonton, Beasley,
Kendleton, Orchard, Egypt and Hungerford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2936 9616 2941 9626 2971 9606 2947 9579
TIME...MOT...LOC 1631Z 239DEG 15KT 2947 9613

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 11:34 AM CDT	Special Weather Statement	HGX	Fort Bend	41 min
Apr 28, 11:52 AM CDT	Special Weather Statement	HGX	Waller	38 min
Apr 28, 11:53 AM CDT	Areal Flood Advisory	HGX	Fort Bend, Wharton	2 hr
Apr 28, 12:25 PM CDT	Special Weather Statement	HGX	Fort Bend	35 min
Apr 28, 12:34 PM CDT	Special Weather Statement	HGX	Waller	41 min
Apr 28, 12:50 PM CDT	Flash Flood Warning	HGX	Fort Bend, Wharton	85 min
Apr 28, 12:51 PM CDT	Areal Flood Advisory	HGX	Harris, Montgomery, Waller	114 min
Apr 28, 1:09 PM CDT	Special Weather Statement	HGX	Fort Bend	36 min
Apr 28, 1:15 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Wharton	30 min
Apr 28, 1:45 PM CDT	Special Weather Statement	HGX	Fort Bend	30 min
Apr 28, 2:00 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Wharton	30 min
Apr 28, 2:01 PM CDT	Special Weather Statement	HGX	Austin	29 min
Apr 28, 2:11 PM CDT	Flash Flood Warning	HGX	Brazoria, Fort Bend, Wharton	109 min
Apr 28, 2:19 PM CDT	Areal Flood Advisory	HGX	Chambers, Harris, Liberty	56 min
Apr 28, 2:22 PM CDT	Tornado Warning	HGX	Brazoria, Fort Bend	23 min
Apr 28, 2:29 PM CDT	Severe Thunderstorm Warning	HGX	Austin, Colorado, Fort Bend, Waller, Wharton	31 min
Apr 28, 2:45 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend	30 min
Apr 28, 3:00 PM CDT	Severe Thunderstorm Warning	HGX	Austin, Colorado, Fort Bend, Waller, Wharton	30 min
Apr 28, 3:06 PM CDT	Areal Flood Advisory	HGX	Austin, Colorado, Wharton	54 min
Apr 28, 3:30 PM CDT	Severe Thunderstorm Warning	HGX	Austin, Colorado, Fort Bend, Waller, Wharton	30 min
Apr 28, 5:22 PM CDT	Wind Advisory	HGX	Chambers, Galveston, Harris, Liberty	3 hr

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.