Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 85, NWS Houston/Galveston, TX

August 4, 2002Houston County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 4, 2002, 8:03 PM CDT for Houston County, Texas. It was in force for 10 days. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 4, 2002, 8:03 PM CDT (01:03 UTC)
Expired: Aug 15, 2002, 5:15 AM CDT
In force: 10 days
Issued by: NWS Houston/Galveston, TX
Area: Counties, with a storm outline in the text

County Houston 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

Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.1 hours before the alert went out and 197 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: 953 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1664 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -33 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.

049 
WUUS54 KHGX 050103
SVRHOU
TXC225-050145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
803 PM CDT SUN AUG 4 2002

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

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

* UNTIL 845 PM CDT

* AT 754 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER
  GRAPELAND...MOVING SOUTHWEST AT 25 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...        
  GRAPELAND...LATEXO...HOUSTON COUNTY LAKE

MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR 
BUSINESS. STAY AWAY FROM WINDOWS. LARGE HAIL AND DAMAGING WINDS ARE 
EXPECTED WITH THIS STORM. 

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 3145 9539 3158 9553 3126 9600 3108 9580

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 4, 8:00 PM CDT, 3 minutes earlier.

Area forecast discussion, Aug 4, 8:00 PM CDT, 3 minutes before

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
800 PM CDT SUN AUG 4 2002

STILL A GOOD BIT OF CONVECTION AROUND...WITH MOST IMPRESSIVE CELLS
UP OVR HOUSTON COUNTY. WITH LOSS OF DAYTIME HTG...ACTIVITY SHD START
TO WANE SHORTLY DUE TO STABILIZATION. WILL TAKE A LOOK AT RADAR JUST
BEFORE 930 PM UPDATE AND MENTION ISOLD BFR MIDNIGHT WHERE NEEDED.

DWPTS HAVE DROPPED OFF QUITE A BIT IN SOME NRN LOCATIONS. MAY TRIM
TEMPS BACK A DEG OR TWO FAR N. WILL ALSO INCLUDE SOME MENTION OF
LATE FOG GIVEN LGT WINDS AND A WET GRND IN SPOTS.

BERTHA WAS BORN THIS EVENING. MOISTURE FROM THIS SYSTEM MAY ENHANCE
RAINFALL INTENSITIES MIDWEEK AND BEYOND. WILL HAVE TO KEEP AN EYE
ON.

.HGX...NONE.

46/41/43/DO

PRELIMS (1ST PD POPS SUBJECT TO CHG)
CLL BB 070/097 072/096 073 132
IAH BB 072/095 073/093 073 143
GLS BB 080/090 080/089 080 143

In the hours before

Special weather statement, Aug 4, 3:45 PM CDT, 4 hours 18 minutes before

TXZ163-164-176>179-195>200-210>214-226-227-235>238-050300-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
345 PM CDT SUN AUG 4 2002

THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS THIS EVENING
ACROSS ALL OF SOUTHEAST TEXAS.

ABUNDANT TROPICAL MOISTURE COMBINED WITH AFTERNOON HEATING HAS LEAD
TO ANOTHER ROUND OF SCATTERED THUNDERSTORMS ACROSS SOUTHEAST TEXAS
THIS AFTERNOON. THESE STORMS WILL LIKELY PERSIST INTO THE EVENING
HOURS BEFORE DIMINISHING AFTER SUNSET.

THE MAIN SEVERE WEATHER THREAT WILL BE DAMAGING DOWNBURST WINDS.
DIME TO QUARTER SIZE HAIL IS ALSO A POSSIBILITY.

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 4, 7:05 PM CDT	Severe Thunderstorm Warning	HGX	Houston	100 min
Aug 4, 8:54 PM CDT	Special Marine Warning	HGX		66 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; the sounding from the Mesonet's radiosonde archive.