Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 39, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 30, 2002, 7:55 PM CDT for Brazoria County, Texas. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 30, 2002, 7:55 PM CDT (00:55 UTC)
- Expired
- May 30, 2002, 8:30 PM CDT
- In force
- 35 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
County Brazoria County, TX
The radar
The Houston radar (KHGX), 59 km from the middle of the area, began a volume at 00:57 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.
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, 0.9 hours before the alert went out and 241 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
- 749 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 691 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
508 WUUS54 KHGX 310055 SVRHOU TXC039-310130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 754 PM CDT THU MAY 30 2002 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BRAZORIA COUNTY IN SOUTHEAST TEXAS * UNTIL 830 PM CDT * AT 752 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES NORTHWEST OF SURFSIDE BEACH...MOVING SOUTH AT 20 MPH. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... OYSTER CREEK...FREEPORT...CLUTE...RICHWOOD QUINTANA...SURFSIDE BEACH HAIL IS THE PRIMARY THREAT WITH THESE STORMS. A SECOND STORM WAS INTENSIFYING NEAR BAILEYS PRAIRIE WILL LIKELY MOVE OVER LAKE JACKSON. 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 2910 9524 2922 9554 2881 9548 2868 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 May 30, 6:20 PM CDT, 1 hour 35 minutes earlier.
Area forecast discussion, May 30, 6:20 PM CDT, 1 hour 35 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 620 PM CDT THU MAY 30 2002 QUICK UPDATE TO UP POPS FOR CENTRAL/COASTAL ZONES FOR THIS EVENING. UPPER LOW WILL DRIFT SOUTHWEST ACROSS CWA NEXT FEW HOURS WITH COMPLEX OF TSRA CONTINUING AS WEAK DISTURBANCES ROTATE AROUND LOW. SEVERE THREAT WILL REMAIN ISOLATED AND SHOULD WANE NEXT COUPLE OF HOURS AS STRONGEST INSTABILITY PUSHES OFFSHORE. TWEAKED WINDS AND TEMPS A BIT AS WELL. 35/36/43/45/39 .HGX...NONE. CLL BB 063/090 066/090 068 332 IAH BB 066/088 068/088 069 742 GLS BB 072/081 073/082 075 742 PREVIOUS DISCUSSION... MID AND UPPER LOW OVER LA THIS AFTERNOON. MODELS STILL FAIRLY CONSISTENT IN DRIFTING THE LOW SOUTHWARD INTO THE GULF BY FRIDAY NIGHT. MOST IMPORTANT ITEMS CONSIDERED INCLUDE POPS AND STORM STRENGTH FOR THE FIRST PERIOD...THEN TEMPERATURES AND POPS FROM THE SECOND PERIOD ON. THE BULK OF THE ACTIVITY SO FAR TODAY HAS BEEN OVER LA. HOWEVER... WATER VAPOR SHOWS A DECENT VORTICITY AREA APPROACHING FROM THE NORTH. WITH TEMPERATURES REACHING INTO THE UPPER 80S AND THE CURRENT MAPS/ ACARS SOUNDINGS INDICATING THE CAP HAS BEEN ERODED...FEEL STORMS ARE LIKELY. THESE SHOULD TAPER OFF TOWARD EVENING...SO WILL KEEP THE CURRENT POPS IN PLACE FOR TONIGHT. SEVERE ITEMS TO CONSIDER LOOK TO BE HAIL AND WIND INLAND GIVEN THE CURRENT CAPE VALUES AT IAH...ABOUT 2000. ALONG THE COAST THERE MAY BE ENOUGH OF A FAVORABLE WIND PROFILE FOR ISOLATED TORNADOES TO BE CONSIDERED...THOUGH AS LCH MENTIONED FUNNEL CLOUDS MAY BE MORE LIKELY. STARTING SUNDAY THE MODELS MOVE A RIDGE OVERHEAD FROM THE NORTH AS THE LOW PUSHES INTO THE GULF. DEPENDING HOW CLOSE THE LOW IS WILL DETERMINE THE POPS. FOR NOW THINK THAT ISOLATED IS BEST FOR MAINLY DAYTIME SEABREEZE ACTIVITY. BETTER CHANCES LOOK TO OCCUR BY WEDNESDAY AS THE RIDGE MOVES EAST AND A TROUGH APPROACHES FROM THE WEST. PL-40 43
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 8:00 PM CDT | Special Marine Warning | HGX | 2 hr | |
| May 30, 10:19 PM CDT | Special Marine Warning | HGX | 86 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.