Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Houston/Galveston, TX

October 27, 2021Chambers County, Liberty County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Oct 27, 2021, 9:58 AM CDT for Chambers County, Liberty County, Texas. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 27, 2021, 9:58 AM CDT (14:58 UTC)
Expired
Oct 27, 2021, 10:30 AM CDT
In force
32 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Chambers County, TX, Liberty County, TX

The radar

The Houston radar (KHGX), 65 km from the middle of the area, began a volume at 15:02 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
Oct 27, 7:55 AM CDTTornado WatchSPC9 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.0 hours before the alert went out and 132 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, Lake Charles Mun, LA at 12:00Z on 2021-10-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1422 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, Lake Charles Mun, LA at 12:00Z on 2021-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 square meters per square second.193958Sfc1 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
1422 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
604 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
1.1
Supercell composite
7.1

Open this sounding in Storm Lab

The text

As transmitted.

711 
WUUS54 KHGX 271458
SVRHGX
TXC071-291-271530-
/O.NEW.KHGX.SV.W.0089.211027T1458Z-211027T1530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Houston/Galveston TX
958 AM CDT Wed Oct 27 2021

The National Weather Service in League City has issued a

* Severe Thunderstorm Warning for...
  Chambers County in southeastern Texas...
  Southeastern Liberty County in southeastern Texas...

* Until 1030 AM CDT.

* At 957 AM CDT, a line of strong thunderstorms was located near 
  Anahuac, or 8 miles east of Beach City, moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Anahuac, Winnie, Stowell, Hankamer, Wallisville and Oak Island. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 400 PM CDT for southeastern
Texas.

For your protection move to an interior room on the lowest floor of a
building.

A Tornado Watch remains in effect until 400 PM CDT for southeastern
Texas.

&&

LAT...LON 2964 9483 3000 9476 3002 9444 2989 9444
      2989 9436 2973 9435 2969 9436 2969 9435
      2960 9435
TIME...MOT...LOC 1457Z 280DEG 27KT 2975 9471 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$
Cady

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 26, 10:39 PM CDTRip Current StatementHGXBrazoria, Galveston, Matagorda21 hr
Oct 27, 6:10 AM CDTSpecial Marine WarningHGX50 min
Oct 27, 6:44 AM CDTSpecial Weather StatementHGXAustin, Brazos, Grimes, Madison, Washington46 min
Oct 27, 6:56 AM CDTSpecial Marine WarningHGX34 min
Oct 27, 6:58 AM CDTSpecial Marine WarningHGX32 min
Oct 27, 7:23 AM CDTSpecial Marine WarningHGX37 min
Oct 27, 7:31 AM CDTSpecial Weather StatementHGXAustin, Colorado, Grimes, Jackson, Montgomery, Walker and 3 more44 min
Oct 27, 8:06 AM CDTTornado WarningHGXHarris, Montgomery24 min
Oct 27, 8:09 AM CDTSpecial Marine WarningHGX66 min
Oct 27, 8:09 AM CDTSpecial Marine WarningHGX66 min
Oct 27, 8:16 AM CDTTornado WarningHGXHarris29 min
Oct 27, 8:28 AM CDTSpecial Weather StatementHGXBrazoria, Fort Bend, Harris, Liberty, Matagorda, Montgomery and 4 more92 min
Oct 27, 8:38 AM CDTSevere Thunderstorm WarningHGXHarris37 min
Oct 27, 8:48 AM CDTTornado WarningHGXHarris, Liberty, Montgomery27 min
Oct 27, 8:55 AM CDTTornado WarningHGXHarris, Liberty35 min
Oct 27, 8:57 AM CDTSpecial Marine WarningHGX93 min
Oct 27, 9:16 AM CDTSevere Thunderstorm WarningHGXHarris29 min
Oct 27, 9:23 AM CDTSevere Thunderstorm WarningHGXChambers, Harris, Liberty37 min
Oct 27, 9:31 AM CDTSpecial Marine WarningHGX119 min
Oct 27, 9:52 AM CDTSpecial Weather StatementHGXChambers, Galveston53 min
Oct 27, 11:31 AM CDTSpecial Marine WarningHGX29 min
Oct 27, 11:51 AM CDTSpecial Marine WarningHGX84 min
Oct 27, 3:05 PM CDTWind AdvisoryHGXAustin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more28 hr
Oct 27, 3:26 PM CDTGale WarningHGX36 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning in 2021

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.