Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 56, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 4, 2001, 7:12 PM CDT for Maverick County, Texas. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 4, 2001, 7:12 PM CDT (00:12 UTC)
- Expired
- May 4, 2001, 8:15 PM CDT
- In force
- 63 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Maverick County, TX
The radar
The Laughlin AFB radar (KDFX), 59 km from the middle of the area, began a volume at 00:11 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.
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, 0.2 hours before the alert went out and 86 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.
253 WUUS54 KEWX 050014 SVRSAT TXC323-050115- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 712 PM CDT FRI MAY 4 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... MAVERICK * UNTIL 815 PM CDT * AT 712 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES SOUTHWEST OF MAVERICK COUNTY...OR ABOUT 7 MILES SOUTH OF EAGLE PASS...MOVING EAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE... RURAL MAVERICK COUNTY AT 730 PM VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER.
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, 3 hours 57 minutes earlier.
Area forecast discussion, May 4, 3:15 PM CDT, 3 hours 57 minutes 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, 1:45 PM CDT, 5 hours 27 minutes before
TXZ171-172-183>190-202>204-050200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 145 PM CDT FRI MAY 4 2001 ...SEVERE THUNDERSTORMS POSSIBLE IN THE HILL COUNTRY THIS AFTERNOON AND TONIGHT... A DEVELOPING LINE OF THUNDERSTORMS IS MOVING ACROSS VAL VERDE COUNTY. THIS LINE IS EXPECTED TO CONTINUE MOVING TOWARD THE EAST AT 20 MPH THIS AFTERNOON AND INCREASE IN AREAL COVERAGE AND INTENSITY. SOME OF THE STORMS COULD APPROACH SEVERE LIMITS...WHICH MEANS THAT LARGE HAIL...GUSTY DAMAGING WINDS...FREQUENT DEADLY LIGHTNING AND LOCALLY HEAVY RAINFALL WHICH COULD PRODUCE FLASH FLOODING MAY OCCUR. THE AREA WITH THE GREATEST RISK OF SEVERE THUNDERSTORMS IS THAT PORTION OF THE TEXAS HILL COUNTRY WEST OF INTERSTATE 35 BETWEEN SAN ANTONIO AND GEORGETOWN...AND ALONG AND NORTH OF U.S. HIGHWAY 90 BETWEEN SAN ANTONIO AND DEL RIO. THIS OUTLOOK APPLIES TO THE FOLLOWING SPECIFIC COUNTIES... GILLESPIE...MEDINA...KENDALL...REAL...BLANCO...KERR...BURNET... BANDERA...LLANO...EDWARDS...KINNEY...UVALDE AND VAL VERDE. ABUNDANT LOW-LEVEL MOISTURE OVER SOUTH TEXAS...COMBINED WITH AN APPROACHING UPPER-LEVEL DISTURBANCE FROM MEXICO...WILL PRODUCE WIDESPREAD SHOWER AND THUNDERSTORM ACTIVITY THIS AFTERNOON AND TONIGHT. SOME OF THE STORMS COULD BE SEVERE. IN ADDITION...A FLASH FLOOD WATCH IS IN EFFECT FOR MUCH OF THE HILL COUNTRY AND ADJACENT SECTIONS OF THE EDWARDS PLATEAU THROUGH TONIGHT. SPOTTER NETWORKS MAY NEED TO BE ACTIVATED AS THE THUNDERSTORMS MOVE INTO THE THREATENED AREA. FOR INFORMATION ON WEATHER THREATS IN SURROUNDING AREAS...REFER TO OUTLOOKS FROM OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH... HOUSTON/GALVESTON AND CORPUS CHRISTI.
Special weather statement, May 4, 6:29 PM CDT, 43 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.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:35 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, 8:15 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Zavala | 60 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.