Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 120, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Dec 12, 2002, 6:58 AM CST for DeWitt County, Gonzales County, Texas. It was in force for 62 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
- Dec 12, 2002, 6:58 AM CST (12:58 UTC)
- Expired
- Dec 12, 2002, 8:00 AM CST
- In force
- 62 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
Counties DeWitt County, TX, Gonzales County, TX
The radar
The Austin/San Antonio radar (KEWX), 76 km from the middle of the area, began a volume at 13:01 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
Corpus Christi, TX (KCRP), launched 12:00Z, 1.0 hours before the alert went out and 169 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
- 308 J/kg
- Mixed-layer CIN
- -416 J/kg
- Mixed-layer LCL
- 551 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 337 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KEWX 121258 SVRSAT TXC123-177-121400- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 658 AM CST THU DEC 12 2002 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... GONZALES DEWITT * UNTIL 800 AM CST * AT 658 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 34 MILES SOUTH OF GONZALES...OR ABOUT 10 MILES SOUTHWEST OF CUERO...MOVING NORTH AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE... OVER GONZALES AT 755 AM IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. LAT...LON 2898 9753 2898 9732 2964 9729 2964 9760 $$
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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 12, 2:30 AM CST, 4 hours 28 minutes earlier.
Area forecast discussion, Dec 12, 2:30 AM CST, 4 hours 28 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 230 AM CST THU DEC 12 2002 MILD PERIOD THIS WEEK...NEAR NORMAL...WITH SYSTEMS TREKKING ACROSS MID CONTINENT AT A DECENT PACE. CONVECTION TODAY ENDING BY MID DAY WEST AND CENTRAL MAY LINGER INTO THE AFTERNOON SOUTHEAST ZONES FLIRTING WITH SEVERE LEVELS DEPENDENT ON DEGREE OF INSTABILITY THAT DEVELOPS ALONG WARM FRONT. WINDS WILL COME NORTHEAST IN RESPONSE TO DEVELOPING SURFACE LOW AND EXPECT THIS TO LIMIT DESTABILIZATION ENOUGH TO SUPPRESS ALL BUT THE MOST ISOLATED ACTIVITY ALONG EASTERN EDGE OF THE CWA AND WILL NOT MENTION SEVERE IN FORECAST. PROLONGED PERIOD OF NORTHWEST FLOW WILL DRY MID AND LOWER LEVELS ALLOWING NICE WARM UP BEHIND FRONT FRIDAY AND INTO THE WEEKEND. TRANSITION TO ZONAL FLOW WILL ALLOW WEAK SOUTHERLY SURFACE FLOW TO DEVELOP ON SUNDAY ALTHOUGH GULF REMAINS SHUT OFF BELOW 850MB WELL INTO THE EXTENDED PERIOD. CLOUD COVER COMING AT MID AND HIGH LEVELS AS UPPER TROF APPROACHES SUNDAY NIGHT. SLIGHT CHANCE OF SHOWERS POSSIBLE WITH PASSAGE OF UPPER TROF ON MONDAY. MOISTURE AND LIFT WITH STRONG MID LEVEL JET SUFFICIENT TO SUPPORT DEEP CONVECTION WEDNESDAY INTO THURSDAY AHEAD OF NEXT FRONT. WRAP AROUND CLOUDS SHOULD REMAIN INTACT OVER CENTRAL AND EASTERN ZONES TODAY KEEPING TEMPS ONCE MORE ON THE COOL SIDE. ALTHOUGH CLOUDS PULL OUT COLD AIR ADVECTION KEEPING WINDS UP OVERNIGHT PREVENTING TEMPS FROM DROPPING BELOW MID 30S TO LOWER 40S AS CURRENTLY INDICATED. PRELIMINARY NUMBERS: AUS 063 038/067 035 3000 DRT 068 038/069 037 3000 SAT 065 040/068 039 3000 .EWX...NONE. 10/06/KW
Hazardous weather outlook, Dec 12, 5:25 AM CST, 1 hour 33 minutes before
TXZ171>173-183>194-202>209-217>225-228-131200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 525 AM CST THU DEC 12 2002 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS MORNING FOR THE EXTREME SOUTHEAST PORTION OF SOUTH CENTRAL TEXAS. THIS COVERS DEWITT AND LAVACA COUNTIES. THESE THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE LARGE HAIL, DAMAGING WINDS AND BRIEF HEAVY RAINFALL OF 1 TO 3 INCHES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS MORNING OVER THE COASTAL PRAIRIES OF SOUTH CENTRAL TEXAS. A DEVELOPING STORM SYSTEM NEAR THE COASTAL BEND WILL PRODUCE SCATTERED SEVERE THUNDERSTORMS THIS MORNING. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
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.