Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 55, NWS Houston/Galveston, TX

June 29, 2002Trinity County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jun 29, 2002, 2:44 PM CDT for Trinity County, Texas. It was in force for 61 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
Jun 29, 2002, 2:44 PM CDT (19:44 UTC)
Expired
Jun 29, 2002, 3:45 PM CDT
In force
61 min
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

County Trinity County, TX

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 7.7 hours before the alert went out and 244 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, Fort Worth, TX at 12:00Z on 2002-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 849 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, Fort Worth, TX at 12:00Z on 2002-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 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
849 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
627 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KHGX 291944
SVRHOU
TXC225-313-455-292045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
242 PM CDT SAT JUN 29 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HOUSTON COUNTY IN SOUTHEAST TEXAS
  TRINITY COUNTY IN SOUTHEAST TEXAS
  MADISON COUNTY IN SOUTHEAST TEXAS

* UNTIL 345 PM CDT

* AT 232 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE 
THUNDERSTORMS WILL MOVE INTO MADISON...SOUTHERN HOUSTON AND SOUTHERN 
TRINITY COUNTIES. THIS LINE OF STORMS IS RACING NORTH AT 30 TO 35 
MPH. THESE STORMS HAVE A HISTORY OF PRODUCING DAMAGE. TREES WERE 
BLOWN DOWN IN WALKER COUNTY AT 230 PM.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  AUSTONIO
  LOVELADY
  CROCKETT
  MADISONVILLE
  TRINITY

MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. STAY AWAY FROM WINDOWS

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3098 9601 3114 9512 3137 9515 3120 9600

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 Jun 29, 9:30 AM CDT, 5 hours 14 minutes earlier.

Area forecast discussion, Jun 29, 9:30 AM CDT, 5 hours 14 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
930 AM CDT SAT JUN 29 2002

RADAR/SAT PIX SHOW LONG FETCH OF DEEP TROPICAL MOISTURE EXTENDING
FROM THE MATAGORDA BAY AREA SOUTHWARD INTO THE GULF TO OFF TAMPICO.
THIS WILL CONTINUE TO BE TRANSPORTED NORTH ALONG THE MODERATE H85
FLOW. WESTERN HALF OF CWA SHOULD SEE THE HEAVIEST PRECIP TODAY...BUT
SINCE THEY HAVENT SEEN TOO MUCH THE LAST SEVERAL DAYS WERE NOT
ANTICIPATING ANY WIDESPREAD FLOOD PROBLEMS ATTM. WILL CONTINUE TO
MONITOR THOUGH WITH PWS AROUND 2.3 AND 88-D ESTIMATED RAINFALL
RATES UP TO 3/HOUR CURRENTLY IN THE GULF. MODELS WANT TO ADVECT
SOME DRIER LLVL AIR INTO THE ERN ZONES THIS AFTN...BUT WITH
WIDESPREAD COVERAGE ALREADY THERE ITS KINDA HARD TO KNOCK THE POPS
DOWN. MAY NEED TO DO AN AFTERNOON UPDATE IF IT DOES TAPER DOWN THEN.
OTHERWISE...ONGOING ZONES IN GOOD SHAPE AND SEE NO NEED FOR AN
UPDATE RIGHT NOW.

WILL RAISE THE SCA FLAGS FOR THE MARINE UPDATE AS GRADIENT HAS
TIGHTENED OFF THE COAST.

47/43/TF

.HGX...SCA BAYS AND GULF 0-60 NM.

PRELIMS...
CLL TE 088/074 090/073 091 745
IAH TB 084/074 087/073 090 745
GLS TB 083/076 085/077 086 745

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 10:07 AM CDTSpecial Marine WarningHGX113 min
Jun 29, 12:20 PM CDTSpecial Marine WarningHGX115 min
Jun 29, 12:52 PM CDTSevere Thunderstorm WarningHGXHarris38 min
Jun 29, 2:16 PM CDTSevere Thunderstorm WarningHGXSan Jacinto, Walker44 min
Jun 29, 2:44 PM CDTSevere Thunderstorm WarningHGXHouston, Madison8 days
Jun 29, 3:06 PM CDTSpecial Marine WarningHGX54 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002Every severe thunderstorm warning in 2002

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.