Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 89, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 19, 2002, 5:31 PM CDT for Polk County, Texas. It was in force for 4 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 19, 2002, 5:31 PM CDT (22:31 UTC)
- Expired
- Aug 23, 2002, 5:00 PM CDT
- In force
- 4 days
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
County Polk 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 12:00Z, 10.5 hours before the alert went out and 240 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.
- Mixed-layer CAPE
- 1856 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 867 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -50 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
231 WUUS54 KHGX 192231 SVRHOU TXC373-192315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 531 PM CDT MON AUG 19 2002 THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... POLK COUNTY IN SOUTHEAST TEXAS * UNTIL 615 PM CDT * AT 527 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES SOUTHEAST OF MOSCOW...BETWEEN MOSCOW AND SEVEN OAKS...MOVING NORTHWEST AT 10 MPH. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... MOSCOW CORRIGAN STRONG WINDS MAY KNOCK DOWN TREES AND POWER LINES OR DAMAGE BUILDINGS. TAKE COVER NOW 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 3109 9488 3090 9465 3077 9477 3093 9508
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 19, 2:40 PM CDT, 2 hours 51 minutes earlier.
Area forecast discussion, Aug 19, 2:40 PM CDT, 2 hours 51 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 240 PM CDT MON AUG 19 2002 LITTLE CHANGE IN AIRMASS EXPECTED OVER THE NEXT FEW DAYS AS SUBTROPICAL RIDGE DOMINATES SE TX WEATHER WHILE SEABREEZE AND DAYTIME HEATING TRIGGER DIURNAL CONVECTION. MAIN FCST CONCERNS NEXT FEW DAYS ARE POPS AND PRECIP COVERAGE. MODEL FCST SOUNDINGS SHOW PWS AROUND 1.9 INCHES EASTERN AREAS...1.6 TO 1.7 INCHES NORTH AND WEST FOR TUE/WED. RIDGE REMAINS IN TACT THROUGH MIDWEEK WITH SEABREEZE ACTING AS ONLY FOCUS FOR CONVECTION SO WILL KEEP JUST SLIGHT CHANCE POPS IN FCST TUE/WED. BY THURSDAY...WEAKNESS IN SUBTROPICAL RIDGE BEGINS TO DEVELOP ACROSS SE TX SO WILL KEEP WITH GOING FCST OF CHANCE POPS STARTING THURSDAY. TEMPS WILL SLOWLY WARM NEXT FEW DAYS AS GROUND DRIES OUT FROM LAST WEEKS RAINS. WILL WORD HIGHS IN UPPER 90S FOR NRN ZONES LATE IN THE WEEK. LATEST AVN/GFS CONTINUES TO SHOW UPPER TROF DIGGING ACROSS GREAT LAKES AREA THIS WEEKEND WITH WEAK TROF OR SHEAR AXIS SETTING UP OVER OR JUST WEST OF SE TX STARTING SUNDAY. GENERAL PATTERN IS SUPPORTED BY LATEST UKMET/CANADIAN RUNS AS WELL. EXPECT FRONT TO STALL WELL NORTH OF CWA OVER THE WEEKEND. HOWEVER...WITH SHEAR AXIS DEVELOPING AND INCREASING MOISTURE...CONVECTIVE COVERAGE WILL INCREASE STARTING SUNDAY. LOOKS LIKE PATTERN WILL STICK AROUND MOST OF NEXT WEEK. WITH INCREASED CLOUDS AND PRECIP...WILL SEE SLIGHTLY LOWER MAX TEMPS BY MON/TUE OF NEXT WEEK. 35/42 .HGX...NONE. PRELIMS... CLL BB 075/096 074/097 074 -1- IAH BB 076/094 075/095 075 121 GLS BB 082/090 081/090 081 222
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.