Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 66, NWS Houston/Galveston, TX

August 3, 2002Brazoria County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 3, 2002, 2:33 PM CDT for Brazoria County, Texas. It was in force for 72 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 3, 2002, 2:33 PM CDT (19:33 UTC)
Expired: Aug 3, 2002, 3:45 PM CDT
In force: 72 min
Issued by: NWS Houston/Galveston, TX
Area: Counties, with a storm outline in the text

County Brazoria County, TX

What was reported inside it

Time	Report	Where	Remark
Aug 3, 3:00 PM CDT	Hail 0.75	Livingston, TX	Hail at Crystal Lakes Estates.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.6 hours before the alert went out and 180 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: 2043 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1333 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

877 
WUUS54 KHGX 031933
SVRHOU
TXC039-032015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
233 PM CDT SAT AUG 3 2002

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BRAZORIA COUNTY IN SOUTHEAST TEXAS

* UNTIL 315 PM CDT

* AT 230 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6   
MILES SOUTHWEST OF JONES CREEK...MOVING WEST NORTHWEST AT 5 MPH. 
EXPECT DAMAGING WINDS WITH THIS STORM.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  JONES CREEK
  BRAZORIA
  SWEENY

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 2888 9557 2897 9542 2914 9573 2906 9577
          2899 9575 2895 9565

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 Aug 3, 1:14 PM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, Aug 3, 1:14 PM CDT, 1 hour 19 minutes before

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
114 PM CDT SAT AUG 3 2002

SENT OUT A QUICK UPDATE...RAISING TEMPS...UPPING POPS AND MENTIONING
SEVERE POSSIBILITY.

.HGX...NONE

47/43

PRELIMS...
CLL BB 102/073 097/073 096 442
IAH BB 101/075 096/075 094 443
GLS BB 092/080 089/080 089 443

In the hours before

Special weather statement, Aug 3, 10:26 AM CDT, 4 hours 7 minutes before

TXZ163-164-176>179-195>200-210>214-226-227-235>238-040000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1026 AM CDT SAT AUG 3 2002

...ISOLATED SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND
EVENING...

MOISTURE IS FORECAST TO INCREASE THIS AFTERNOON AS A LOW LEVEL
SHEAR AXIS MOVES INTO THE AREA FROM THE EAST. THIS MOISTURE COMBINED
WITH AFTERNOON TEMPERATURES IN THE MID AND UPPER 90S WILL LEAD TO THE
DEVELOPMENT OF SCATTERED SHOWERS AND THUNDERSTORMS.

AN AREA OF FAIRLY DRY AIR WILL PERSIST IN THE LOWER LEVELS OF THE
ATMOSPHERE WHICH WILL INCREASE THE RISK FOR WIND DAMAGE IN THE
STRONGER STORMS. THOUGH WIDESPREAD SEVERE WEATHER IS NOT
ANTICIPATED...ISOLATED DOWNBURSTS ARE POSSIBLE THROUGH THE EARLY
EVENING HOURS.

STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:03 PM CDT	Severe Thunderstorm Warning	HGX	Polk	87 min
Aug 3, 3:46 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery	59 min
Aug 3, 3:47 PM CDT	Severe Thunderstorm Warning	HGX	Fort Bend	58 min
Aug 3, 3:50 PM CDT	Severe Thunderstorm Warning	HGX	Matagorda	55 min
Aug 3, 3:55 PM CDT	Special Marine Warning	HGX		2 hr
Aug 3, 3:56 PM CDT	Severe Thunderstorm Warning	HGX	Jackson	2 hr
Aug 3, 4:56 PM CDT	Severe Thunderstorm Warning	HGX	Harris	64 min
Aug 3, 5:14 PM CDT	Severe Thunderstorm Warning	HGX	Colorado	31 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.