Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 38, NWS Brownsville, TX
NWS Brownsville, TX issued this severe thunderstorm warning at Oct 20, 2002, 5:06 PM CDT for Cameron County, Hidalgo County, Willacy County, Texas. It was in force for 84 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
- Oct 20, 2002, 5:06 PM CDT (22:06 UTC)
- Expired
- Oct 20, 2002, 6:30 PM CDT
- In force
- 84 min
- Issued by
- NWS Brownsville, TX
- Area
- Counties, with a storm outline in the text
Counties Cameron County, TX, Hidalgo County, TX, Willacy County, TX
The radar
The Brownsville radar (KBRO), 60 km from the middle of the area, began a volume at 22:08 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 |
|---|---|---|---|
| Oct 20, 5:26 PM CDT | Hail 1.75 | Port Mansfield, TX | The Harbormaster in Port Mansfield reported 1.75 inch hail. |
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
Brownsville Intl, TX (KBRO), launched 12:00Z, 10.1 hours before the alert went out and 62 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
- 1974 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
198 WUUS54 KBRO 202206 SVRBRO TXC061-215-489-202300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BROWNSVILLE TX 506 PM CDT SUN OCT 20 2002 THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN CAMERON COUNTY IN DEEP SOUTH TEXAS SOUTHWESTERN WILLACY COUNTY IN DEEP SOUTH TEXAS CENTRAL HIDALGO COUNTY IN DEEP SOUTH TEXAS * UNTIL 600 PM CDT * AT 505 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR DONNA...MOVING NORTH AT 15 MPH. THIS SEVERE THUNDERSTORM WILL LIKELY PRODUCE HAIL TO THE SIZE OF NICKELS... AND WINDS IN EXCESS OF 60 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... EDINBURG BY 520 PM CDT. THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE. LAT...LON 2615 9825 2612 9788 2643 9781 2649 9821 PHILO
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 Brownsville, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 20, 2:50 PM CDT, 2 hours 16 minutes earlier.
Area forecast discussion, Oct 20, 2:50 PM CDT, 2 hours 16 minutes before
DEEP SOUTH TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 250 PM CDT SUN OCT 20 2002 .SHORT TERM...THE UPPER LEVEL LOW HAS CONTINUED ON ITS EASTWARD PROGRESSION AND IS CURRENTLY OVER ARKANSAS. AT THE SURFACE...A COLD FRONT EXTENDS FROM AR THROUGH THE TX HILL COUNTRY...WHILE A SURFACE TROUGH EXTENDS FROM LA THROUGH THE WEST GULF OF MEX WATERS AND BACK ON SHORE NEAR BRO. THIS BOUNDARY IS EXPECTED TO WEAKEN TODAY... ALLOWING THE WINDS TO BECOME MORE UNIFORM AND SOUTHEASTERLY. THIS WEAKENING BOUNDARY AS WELL AS THE RRQ OF THE UPPER LEVEL JET WILL AID IN UVV TONIGHT. PLUS WITH PWATS APPROACHING 2 IN...ADEQUATE MOISTURE APPEARS TO BE IN PLACE FOR SHOWER/THUNDERSTORM DEVELOPMENT. AVN AND ETA BOTH HAVE PRECIP. TONIGHT FOR THE AREA...HOWEVER...BY MONDAY THE ETA KEEPS MOST OF THE PRECIP TO THE NORTH. THE AVN HAS STRONGER OVERRUNNING/ISENTROPIC LIFT TO THE NORTH AS WELL AS MORE PRECIP. BELIEVE BEST CHANCE WILL BE IN THE MORNING AS GREATEST UVV SHIFTS FROM DEPSOTX TO LA BY MON. NIGHT. MODELS TRENDING DRIER FOR TUES...WILL ADJUST ZONES TO REFLECT THIS CHANGE. .EXTENDED...AN UPPER LEVEL LOW WILL TRAVERSE THE SOUTHERN U.S. IN THE WEST-SOUTHWESTERLY FLOW REACHING TEXAS BY FRIDAY. AT THE SURFACE...ONSHORE FLOW WILL CONTINUE UNTIL LATE FRIDAY WHEN THE ASSOCIATED COLD FRONT IS EXPECTED TO MAKE IT INTO SOUTH TEXAS...WHETHER OR NOT IT WILL REACH DEPSOTX IS STILL IN QUESTION. OTHERWISE...MOST OF THE WEEK SEEMS RELATIVELY DRY. .MARINE DISCUSSION...THE POTENTIAL FOR ISOLATED SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER THE COASTAL WATERS THROUGH MID WEEK...AS MOIST GULF AIR IS DESTABILIZED BY CONDITIONS ALOFT. THE AVN IS MORE AGGRESSIVE WITH RAINFALL AREAL COVERAGE AND AMOUNT. WINDS WILL REMAIN LIGHT TO MODERATE FROM THE SOUTHEAST...WITH SEAS MODERATE AS WELL. NO FLAGS ARE EXPECTED IN THE SHORT TERM. BY MID WEEK A COLD FRONT PUSHES SOUTH INTO CENTRAL AND EAST TEXAS...AND THE AVN THEN DEVELOPS DEEPENING SURFACE LOW PRESSURE IN EAST TEXAS LATE IN THE WEEK. IF THIS VERIFIES...WINDS WILL INCREASE OVER THE LOWER TEXAS COASTAL WATERS TOWARD THE END OF THE WEEK...THOUGH SMALL CRAFT ADVISORIES STILL APPEAR MARGINAL AT THIS POINT. PRELIMINARY NUMBERS... BRO EE 072/085 072/086 072 50/30/20/20/00 HRL EE 070/085 070/086 071 50/30/20/20/00 MFE EE 070/086 070/087 070 50/30/20/20/00 RGC EE 069/086 068/088 068 50/30/20/20/00 SPI EE 076/081 074/080 075 30/20/20/20/00 SYNOPTIC...63 AVIATION-MARINE-MESO...54 INTERNET ADDRESS...WWW.SRH.NOAA.GOV/BRO .BRO...NONE.
Hazardous weather outlook, Oct 20, 4:41 PM CDT, 25 minutes before
TXZ248>257-211100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BROWNSVILLE TX 441 PM CDT SUN OCT 20 2002 THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS. .DAY ONE... SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ALONG A SURFACE TROUGH OF LOW PRESSURE. SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS THE REGION LATE THIS AFTERNOON AND TONIGHT. SOME STORMS COULD BE SEVERE. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS NOT NEEDED AT THIS TIME. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED.
The office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 19, 7:37 PM CDT | Severe Thunderstorm Warning | BRO | Brooks, Kenedy | 68 min |
| Oct 19, 8:16 PM CDT | Severe Thunderstorm Warning | BRO | Brooks | 21 hr |
| Oct 20, 4:17 PM CDT | Severe Thunderstorm Warning | BRO | Cameron, Hidalgo | 103 min |
| Oct 20, 4:29 PM CDT | Tornado Warning | BRO | Kenedy | 31 min |
| Oct 20, 4:32 PM CDT | Special Marine Warning | BRO | 58 min | |
| Oct 20, 4:32 PM CDT | Special Marine Warning | BRO | 58 min | |
| Oct 20, 5:02 PM CDT | Tornado Warning | BRO | Kenedy, Willacy | 28 min |
| Oct 20, 5:24 PM CDT | Severe Thunderstorm Warning | BRO | Cameron, Hidalgo, Willacy | 81 min |
| Oct 20, 5:29 PM CDT | Tornado Warning | BRO | Hidalgo | 31 min |
| Oct 20, 5:41 PM CDT | Special Marine Warning | BRO | 2 hr | |
| Oct 20, 5:51 PM CDT | Severe Thunderstorm Warning | BRO | Cameron, Willacy | 69 min |
| Oct 20, 6:17 PM CDT | Severe Thunderstorm Warning | BRO | Cameron, Hidalgo, Kenedy, Willacy | 88 min |
| Oct 20, 6:38 PM CDT | Tornado Warning | BRO | Cameron | 37 min |
| Oct 20, 6:58 PM CDT | Severe Thunderstorm Warning | BRO | Cameron | 47 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.