Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 86, NWS Houston/Galveston, TX

May 26, 2020Chambers County, Liberty County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 26, 2020, 7:17 PM CDT for Chambers County, Liberty County, Texas. It was in force for 43 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: May 26, 2020, 7:17 PM CDT (00:17 UTC)
Expired: May 26, 2020, 8:00 PM CDT
In force: 43 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Chambers County, TX, Liberty County, TX

The radar

The Houston radar (KHGX), 60 km from the middle of the area, began a volume at 00:20 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

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.3 hours before the alert went out and 150 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: 1337 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1026 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: -11 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.8

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 May 26, 6:50 PM CDT, 27 minutes earlier.

Area forecast discussion, May 26, 6:50 PM CDT, 27 minutes before

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In the hours before

Special weather statement, May 26, 4:35 PM CDT, 2 hours 42 minutes before

Special Weather Statement
National Weather Service Houston/Galveston TX
435 PM CDT Tue May 26 2020

TXZ178-179-262215-
San Jacinto TX-Polk TX-
435 PM CDT Tue May 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SAN JACINTO...NORTHERN
LIBERTY AND SOUTHWESTERN POLK COUNTIES UNTIL 515 PM CDT...

At 435 PM CDT, Doppler radar was tracking a strong thunderstorm over
Coldspring, or 15 miles southwest of Livingston, moving east at 25
mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Livingston, Shepherd, Coldspring, Goodrich, Lake Livingston State
Park, West Livingston and Evergreen.

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 3049 9484 3048 9485 3054 9527 3066 9528
      3081 9476 3049 9470
TIME...MOT...LOC 2135Z 263DEG 23KT 3060 9516

Special weather statement, May 26, 4:43 PM CDT, 2 hours 34 minutes before

Special Weather Statement
National Weather Service Houston/Galveston TX
443 PM CDT Tue May 26 2020

TXZ164-177>179-262245-
San Jacinto TX-Walker TX-Polk TX-Trinity TX-
443 PM CDT Tue May 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TRINITY...
NORTHWESTERN SAN JACINTO...WEST CENTRAL POLK AND NORTHEASTERN WALKER
COUNTIES UNTIL 545 PM CDT...

At 443 PM CDT, Doppler radar was tracking a strong thunderstorm near
Huntsville, moving northeast at 15 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Eastern Huntsville, Trinity, Onalaska, Point Blank, Riverside,
Sebastopol and Oakhurst.

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 3066 9554 3084 9561 3108 9523 3078 9507
TIME...MOT...LOC 2143Z 246DEG 13KT 3080 9550

Special weather statement, May 26, 5:46 PM CDT, 1 hour 31 minutes before

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Special weather statement, May 26, 6:43 PM CDT, 34 minutes before

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Local storm report, May 26, 7:07 PM CDT, 10 minutes before

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Special weather statement, May 26, 7:12 PM CDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 7:12 PM CDT	Special Weather Statement	HGX	Chambers	48 min
May 26, 7:24 PM CDT	Areal Flood Advisory	HGX	Chambers, Liberty	66 min
May 26, 8:23 PM CDT	Special Weather Statement	HGX	Chambers	52 min
May 26, 9:25 PM CDT	Special Weather Statement	HGX	Chambers	50 min
May 26, 9:30 PM CDT	Areal Flood Advisory	HGX	Chambers	2 hr
May 26, 10:21 PM CDT	Special Marine Warning	HGX		54 min
May 27, 1:45 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson	60 min
May 27, 2:42 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Grimes, Washington	48 min
May 27, 3:08 PM CDT	Severe Thunderstorm Warning	HGX	Austin, Brazos, Grimes, Harris, Montgomery, Waller and 1 more	52 min
May 27, 3:21 PM CDT	Tornado Warning	HGX	Grimes, Harris, Montgomery, Waller, Washington	24 min
May 27, 3:52 PM CDT	Special Weather Statement	HGX	Liberty	38 min
May 27, 3:54 PM CDT	Severe Thunderstorm Warning	HGX	Austin, Fort Bend, Harris, Montgomery, Waller	36 min
May 27, 4:06 PM CDT	Severe Thunderstorm Warning	HGX	Harris, Liberty, Montgomery	24 min
May 27, 4:28 PM CDT	Severe Thunderstorm Warning	HGX	Austin, Brazoria, Chambers, Fort Bend, Galveston, Harris and 4 more	62 min
May 27, 4:29 PM CDT	Special Marine Warning	HGX		61 min
May 27, 4:45 PM CDT	Areal Flood Advisory	HGX	Brazoria, Fort Bend, Harris	2 hr
May 27, 4:50 PM CDT	Tornado Warning	HGX	Chambers, Galveston, Harris	13 min
May 27, 5:06 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty	54 min
May 27, 5:14 PM CDT	Special Marine Warning	HGX		31 min
May 27, 5:28 PM CDT	Areal Flood Advisory	HGX	Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty	115 min
May 27, 5:34 PM CDT	Severe Thunderstorm Warning	HGX	Fort Bend, Wharton	26 min
May 27, 5:43 PM CDT	Special Marine Warning	HGX		62 min
May 27, 6:09 PM CDT	Special Weather Statement	HGX	Burleson	51 min
May 27, 6:51 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Grimes, Montgomery, Walker	39 min
May 27, 6:55 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Washington	20 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.