Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 99, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 26, 2002, 11:34 PM CDT for Houston County, Texas. It was in force for 116 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 26, 2002, 11:34 PM CDT (04:34 UTC)
- Expired
- Aug 27, 2002, 1:30 AM CDT
- In force
- 116 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
County Houston County, TX
The radar
The Shreveport radar (KSHV), 187 km from the middle of the area, began a volume at 04:36 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 |
|---|---|---|---|
| Aug 27, 12:55 AM CDT | Thunderstorm Wind | Kennard, TX | Trees down in the Davy Crockett National Forest. |
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
Shreveport, LA (KSHV), launched 00:00Z, 4.6 hours before the alert went out and 196 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
- 1112 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1861 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
654 WUUS54 KHGX 270434 SVRHOU TXC225-270515- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1133 PM CDT MON AUG 26 2002 THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HOUSTON COUNTY IN SOUTHEAST TEXAS * UNTIL 1215 AM CDT * AT 1124 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR GRAPELAND...MOVING SOUTH AT 25 MPH. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... LATEXO...CROCKETT AUSTONIO...LOVELADY 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 3122 9577 3108 9541 3155 9527 3160 9554
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 26, 11:30 PM CDT, 4 minutes earlier.
Area forecast discussion, Aug 26, 11:30 PM CDT, 4 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1130 PM CDT MON AUG 26 2002 UPDATED REMAINING PORTION OF 1ST PERIOD TO REFLECT CONTINUING CHANCE OF SHRA/TSRA NE ZONES. LOWERED POPS SE ZONES DUE TO THE AREA STABILIZING FROM PREVIOUS CLUSTER OF STORMS (EARLIER THIS EVENING). 37/45 .HGX...NONE. CLL BB 075/097 075/097 075 132 IAH BB 076/095 076/095 076 232 GLS BB 080/092 080/090 079 222
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 7:32 PM CDT | Severe Thunderstorm Warning | HGX | Chambers | 58 min |
| Aug 26, 7:37 PM CDT | Special Marine Warning | HGX | 53 min | |
| Aug 26, 7:59 PM CDT | Severe Thunderstorm Warning | HGX | Galveston | 61 min |
| Aug 26, 8:02 PM CDT | Severe Thunderstorm Warning | HGX | Polk | 58 min |
| Aug 26, 8:12 PM CDT | Severe Thunderstorm Warning | HGX | Chambers | 63 min |
| Aug 26, 8:24 PM CDT | Special Marine Warning | HGX | 66 min | |
| Aug 26, 8:30 PM CDT | Severe Thunderstorm Warning | HGX | Galveston | 75 min |
| Aug 26, 8:52 PM CDT | Severe Thunderstorm Warning | HGX | Trinity | 68 min |
| Aug 26, 9:09 PM CDT | Severe Thunderstorm Warning | HGX | Polk | 3 hr |
| Aug 26, 9:27 PM CDT | Special Marine Warning | HGX | 2 hr | |
| Aug 26, 9:27 PM CDT | Special Marine Warning | HGX | 2 hr | |
| Aug 27, 12:38 AM CDT | Severe Thunderstorm Warning | HGX | Houston | 11 hr |
| Aug 27, 10:23 AM CDT | Severe Thunderstorm Warning | HGX | Houston | 97 min |
| Aug 27, 10:59 AM CDT | Severe Thunderstorm Warning | HGX | Trinity | 76 min |
| Aug 27, 11:11 AM CDT | Severe Thunderstorm Warning | HGX | Polk | 3 hr |
| Aug 27, 1:03 PM CDT | Special Marine Warning | HGX | 117 min | |
| Aug 27, 1:18 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 57 min |
| Aug 27, 1:34 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 86 min |
| Aug 27, 2:20 PM CDT | Severe Thunderstorm Warning | HGX | Galveston, Harris | 115 min |
| Aug 27, 2:53 PM CDT | Special Marine Warning | HGX | 67 min | |
| Aug 27, 3:31 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria | 119 min |
| Aug 27, 3:44 PM CDT | Special Marine Warning | HGX | 2 hr | |
| Aug 27, 4:29 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Matagorda | 23 days |
| Aug 27, 4:36 PM CDT | Special Marine Warning | HGX | 114 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.