Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 58, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 4, 2001, 8:15 PM CDT for Dimmit County, Zavala County, Texas. It was in force for 60 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- May 4, 2001, 8:15 PM CDT (01:15 UTC)
- Expired
- May 4, 2001, 9:15 PM CDT
- In force
- 60 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Dimmit County, TX, Zavala County, TX
The radar
The Laughlin AFB radar (KDFX), 76 km from the middle of the area, began a volume at 01:18 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 |
|---|---|---|---|
| May 4, 9:00 PM CDT | Thunderstorm Wind | Carrizo Spgs, 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 4, 4:30 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 1.3 hours before the alert went out and 121 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
- 73 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 906 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KEWX 050115 SVRSAT TXC127-507-050215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 815 PM CDT FRI MAY 4 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... DIMMIT ZAVALA * UNTIL 915 PM CDT * AT 815 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES WEST OF COMETA...OR ABOUT 16 MILES NORTHEAST OF EL INDIO...MOVING EAST AT 25 MPH. * THIS WARNING INCLUDES LOCATIONS IN AND AROUND... COMETA CRYSTAL CITY LOMA VISTA A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED. LAT...LON 2882 10003 2849 10003 2843 9953 2899 9960
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 May 4, 3:15 PM CDT, 5 hours earlier.
Area forecast discussion, May 4, 3:15 PM CDT, 5 hours before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
315 PM CDT FRI MAY 4 2001
WILL EXTEND THE FLASH FLOOD WATCH EAST INTO CENTRAL AND NORTHEASTERN
SECTIONS OF SOUTH CENTRAL TEXAS THIS AFTERNOON AS MOST MODELS DRAG A
SLOW MOVING COMPLEX OF THUNDERSTORMS THROUGH THE AREA TONIGHT. ETA
MODELS WHILE SHOWING POOR PERFORMANCE ON PRECIP FORECASTING HAVE
DONE WELL ON PRECIPITABLE WATER VALUES. STRONG SHORTWAVE LIFTING OUT
OF MEXICO IS TRIGGERING CURRENT THUNDERSTORM ACTIVITY, AND NORTHEAST
MOVEMENT OF THE SHORTWAVE COMBINED WITH GOOD DIFFULENCE ALOFT WILL
ALLOW FOR HEAVY RAINS TO MOVE OVER THE PROPOSED WATCH AREA.
SOUTHEAST COUNTIES MAY MISS OUT ON THE HEAVIEST PART OF THE SQUALL
SO WILL ONLY MENTION LOCALLY HEAVY RAINFALL HERE. LATE TOMORROW THE
AREA WILL LIKELY SEE ANOTHER GOOD FLARE UP OF ORGANIZED
THUNDERSTORMS AND A CHANCE FOR FLOODING, BUT WILL NOT EXTEND THE
WATCH WITH UNCERTAINTY IN WHICH AREAS WILL RECEIVE HEAVIEST RAINS
FOR TONIGHT. GUIDANCE TEMPERATURES LOOK APPROPRIATELY MILD FOR THE
NEXT FEW DAYS.
MODELS GOING IN DIFFERENT DIRECTIONS BEYOND TUESDAY WITH 12Z AVN
ACCELERATING THE UPPER LOW POSITION TO SUPPORT DRY WEATHER OVER
SOUTH TX WEDNESDAY. GUIDANCE NUMBERS CLOSE TO CLIMO, BUT CLIMO EVEN
CALLS FOR A CHANCE OF RAIN. MRF SUGGESTS NW FLOW PATTERN LATE IN THE
WEEK AND WHILE NOGAPS SUGGESTS PROLONGED INSTABILITY IN THE BAJA
REGION. THUS CAN NOT RULE OUT AT LEAST SLIGHT CHANCE POPS FOR ANY
DAY THROUGH NEXT FRIDAY.
PRELIMINARY NUMBERS...
AUS 68/79/70/84 8662
DRT 67/85/69/89 6432
SAT 69/80/70/84 6642
.EWX...FLASH FLOOD WATCH THROUGH TONIGHT FOR ALL OF THE SOUTH ?
CENTRAL TEXAS AND THE HILL COUNTRY EXCEPT FOR FAR SOUTHEAST
COUNTIES.
18In the hours before
Special weather statement, May 4, 6:29 PM CDT, 1 hour 46 minutes before
TXZ171>173-183>194-202>208-217>221-228-050000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 629 PM CDT FRI MAY 4 2001 ...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR VAL VERDE AND KINNEY COUNTIES THROUGH 7 PM... ...A FLASH FLOOD WARNING IS IN EFFECT FOR VAL VERDE AND EDWARDS COUNTIES THROUGH 8 PM... ...A TORNADO WATCH IS IN EFFECT UNTIL 9 PM FOR THE HILL COUNTRY AND PORTIONS OF SOUTH CENTRAL TEXAS WEST OF A BURNET TO BOERNE TO PEARSALL LINE... ...A FLASH FLOOD WATCH IS IN EFFECT FOR THE HILL COUNTRY AND PORTIONS OF SOUTH CENTRAL TEXAS NORTHWEST OF A PLEASANTON TO GIDDINGS LINE... STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL TELEVISION OR RADIO STATIONS...OR YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS CONCERNING THIS DANGEROUS SEVERE WEATHER AND FLASH FLOOD EVENT.
Local storm report, May 4, 7:14 PM CDT, 1 hour 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
714 PM CDT FRI MAY 4 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0330 PM N COMSTOCK TX 1.00 INCH HAIL
05/04/01 VALVERDE REPORTED BY LAW
ENFORCEMENT
0604 PM 8 NNW DEL RIO TX .75 INCH HAIL
05/04/01 VAL VERDE REPORTED BY
SPOTTERS
0605 PM DEL RIO TX .88 INCH HAIL
05/04/01 VAL VERDE
DCSpecial weather statement, May 4, 7:15 PM CDT, 1 hour before
TXZ171>173-183>194-202>208-217>221-228-050045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 715 PM CDT FRI MAY 4 2001 ...A TORNADO WARNING IS IN EFFECT FOR KINNEY COUNTY THROUGH 745 PM... ...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR MAVERICK COUNTY THROUGH 815 PM.... ...A FLASH FLOOD WARNING IS IN EFFECT FOR VAL VERDE AND EDWARDS COUNTIES THROUGH 8 PM AND FOR KINNEY COUNTY THROUGH 9 PM... ...A TORNADO WATCH IS IN EFFECT UNTIL 9 PM FOR THE HILL COUNTRY AND PORTIONS OF SOUTH CENTRAL TEXAS WEST OF A BURNET TO BOERNE TO PEARSALL LINE... ...A FLASH FLOOD WATCH IS IN EFFECT FOR THE HILL COUNTRY AND PORTIONS OF SOUTH CENTRAL TEXAS NORTHWEST OF A PLEASANTON TO GIDDINGS LINE... STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL TELEVISION OR RADIO STATIONS...OR YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS CONCERNING THIS DANGEROUS SEVERE WEATHER AND FLASH FLOOD EVENT.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:12 PM CDT | Severe Thunderstorm Warning | EWX | Maverick | 63 min |
| May 4, 7:35 PM CDT | Tornado Warning | EWX | Maverick | 40 min |
| May 4, 7:54 PM CDT | Severe Thunderstorm Warning | EWX | Bandera, Real | 66 min |
| May 4, 8:06 PM CDT | Flash Flood Warning | EWX | Bandera, Uvalde | 114 min |
| May 4, 10:14 PM CDT | Tornado Warning | EWX | Frio | 46 min |
| May 5, 2:20 AM CDT | Flash Flood Warning | EWX | Bandera, Real, Uvalde | 3 hr |
| May 5, 3:22 PM CDT | Flash Flood Warning | EWX | Karnes | 113 min |
| May 5, 3:45 PM CDT | Flash Flood Warning | EWX | Lavaca | 2 hr |
| May 5, 4:01 PM CDT | Flash Flood Warning | EWX | DeWitt | 119 min |
| May 5, 5:02 PM CDT | Flash Flood Warning | EWX | Travis, Williamson | 88 min |
| May 5, 5:41 PM CDT | Flash Flood Warning | EWX | Lavaca | 2 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001
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.