Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 51, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jun 21, 2002, 9:15 PM CDT for Montgomery County, Texas. It was in force for 30 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
- Jun 21, 2002, 9:15 PM CDT (02:15 UTC)
- Expired
- Jun 21, 2002, 9:45 PM CDT
- In force
- 30 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
County Montgomery County, TX
The radar
The Houston radar (KHGX), 97 km from the middle of the area, began a volume at 02:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 21, 9:30 PM CDT | Hail 0.75 | Conroe, TX |
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 00:00Z, 2.3 hours before the alert went out and 213 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
- 309 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1947 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KHGX 220215 SVRHOU TXC339-220245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 915 PM CDT FRI JUN 21 2002 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MONTGOMERY COUNTY IN SOUTHEAST TEXAS * UNTIL 945 PM CDT * AT 909 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES SOUTHWEST OF CUT AND SHOOT...MOVING WEST AT 25 MPH. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... CUT AND SHOOT CONROE PANORAMA VILLAGE 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 3024 9553 3023 9523 3038 9525 3040 9552
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 21, 8:32 PM CDT, 43 minutes earlier.
Area forecast discussion, Jun 21, 8:32 PM CDT, 43 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 830 PM CDT FRI JUN 21 2002 HAVE UPDATED ZFPHGX TO REFLECT LINGERING ISOLATED TO WIDELY SCATTERED CONVECTION OVER WESTERN ZONES. EXPECT THIS TO DECREASE IN AREAL COVERAGE AND INTENSITY NEXT 1-2 HOURS. OTHERWISE...THE REST OF PREVIOUS FORECAST PACKAGE (INCLUDING MARINE) ON TRACK. .HGX...NONE. CLL BB 069/094 067/094 069 100 IAH BB 072/093 069/093 071 200 GLS BB 075/088 075/088 078 200 37/36/TF PREVIOUS DISCUSSION... SH/TSRA DEVELOPMENT STARTING TO PICK UP THIS AFTERNOON BUT COVERAGE SO FAR HAS NOT BEEN EVEN CLOSE TO THAT OF YESTERDAY. THUS..IT WOULD SEEM THAT THE DRIER/SUBSIDENT AIRMASS IS WINNING OUT ACROSS THE FA. OVERALL SYNOPTIC PATTERN/SCHEMA NOT PROGGED TO CHANGE TOO MUCH FROM THE PREVIOUS RUNS..SAVE FOR SOME MINOR DIFFERENCES WITH TIMING. THE UPPER LOW IS STILL FORECAST TO MOVE WWD ALONG THE N/NC COAST TOWARD OUR REGION THROUGH THE PERIOD..BUT NOW COULD BE CLOSE ENOUGH ON SUN TO WARRANT THE RE-INTRODUCTION OF SOME LOWISH POPS STARTING AT THAT TIMEFRAME. THE ENSUING WEAKNESS IN THE UPPER RIDGE WHICH IS PROGGED TO EVOLVE INTO AN AMPLIFIED RIDGE OVER THE WEST AND DEEP TROFFINESS TO THE EAST SHOULD HELP KEEP A SLIGHT CHC/CHC POPS IN OUR FCST THRU MOST OF NEXT WEEK. WILL TAKE A BLEND OF MOS FOR THE FINAL TALLY FOR TEMPS. 41/47
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 9:43 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Montgomery | 47 min |
| Jun 22, 1:03 PM CDT | Special Marine Warning | HGX | 57 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.