Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 79, NWS San Angelo, TX

May 7, 2001McCulloch County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 7, 2001, 5:59 PM CDT for McCulloch County, Texas. It was in force for 31 min. 2 reports 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 7, 2001, 5:59 PM CDT (22:59 UTC)
Expired
May 7, 2001, 6:30 PM CDT
In force
31 min
Issued by
NWS San Angelo, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County McCulloch County, TX

What was reported inside it

TimeReportWhereRemark
May 7, 6:25 PM CDTHail 2.5Doole, TXAn isolated severe storm dropped hail up to tennis ball size across extreme northwest McCulloch County. The hail broke all of the double pane windows and a skylight on one side of a house, allowing rain water to enter.
May 7, 6:35 PM CDTHail 1Pear Vly, 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 nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.0 hours before the alert went out and 256 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.

Skew-T log-pSkew-T log-p diagram, Del Rio, TX at 12:00Z on 2001-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1636 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 2001-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1636 J/kg
Mixed-layer CIN
-133 J/kg
Mixed-layer LCL
644 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KSJT 072301
SVRSJT

TXC307-072330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
559 PM CDT MON MAY 7 2001

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MCCULLOCH COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 630 PM CDT

* AT 556 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTHWEST OF PEAR VALLEY...OR ABOUT 20
  MILES NORTHWEST OF BRADY...MOVING NORTHEAST AT 20 MPH.

HAILSTONES AS LARGE AS NICKELS ARE LIKELY WITH THIS STORM. MOVE TO 
AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING AND STAY 
AWAY FROM WINDOWS.

LAT...LON 3140 9957 3123 9957 3142 9928 3144 9952

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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 7, 3:15 PM CDT, 2 hours 44 minutes earlier.

Area forecast discussion, May 7, 3:15 PM CDT, 2 hours 44 minutes before
WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
315 PM CDT MON MAY 7 2001

COLD FRONT EXTENDED FROM SOUTH OF MIDLAND....TO SAN ANGELO...THEN
NORTHEAST TO ABILENE AND WICHITA FALLS AT 20Z. SOME BOUNDARIES WERE
INDICATED MOVING WEST ACROSS THE CONCHO VALLEY...FROM OUTFLOW OF
STORMS THAT INITIATED EARLIER THIS MORNING OVER NORTH AND CENTRAL
TEXAS.

SATELLITE BASED CAPES WERE 3000 J/KG TO 3800 J/KG AT 17Z OVER SOUTHERN
HALF OF CWA...WITH SLIGHTLY LOWER OVER NORTHERN SECTIONS (BIG
COUNTRY).  VERY LITTLE CIN PRESENT...AND A FEW STORMS WERE DEVELOPING
NEAR MENARD AND ABILENE. SEVERE STORMS POSSIBLE THROUGH EARLY EVENING.
ANOTHER POTENTIAL AREA OF CONCERN IS FLASH FLOOD POTENTIAL...AS STORMS
WILL BE VERY SLOW MOVING...AND LOCALIZED AREAS COULD SEE LOCALLIZE
HEAVY RAINFALL AMOUNTS...PARTICULARLY AREAS SOUTH OF THE BIG COUNTY.
WILL HOLD OFF ON FLASH FLOOD WATCH AS THERE DOES NOT LOOK LIKE A
PROCESS FOR SUSTAINED INFLOW...LIKE A STRONG 850 MB JET OVER THE
STALLED FRONT. STILL...WILL MONITOR THE POTENTIAL FLOOD SITUATION.

FORWARD MOVEMENT FRONT HAS SLOWED DOWN...AN IT APPEARS AREAS SOUTH OF
INTERSTATE 20 WILL HAVE THE BEST CHANCE OF CONVECTION THIS AFTERNOON
AND EVENING...AS FRONT SLOWLY PUSHES SOUTH AND WASHES OUT IN THE
INTERSTATE 10 AREA LATER TONIGHT AND TUESDAY.

WILL KEEP FORECAST AREA DRY WEDNESDAY AND THURSDAY...THOUGH WOULD NOT
BE SURPRISED TO SEE AN ISOLATED THUNDERSTORM OR TWO. KEEP A SLIGHT
CHANCE OF STORMS FRIDAY AND SATURDAY...AS MRF MODELS INDICATES A WEAK
SHORTWAVE OVER FRIDAY...AND WEAK FRONT SATURDAY.

ABI 058/078/060/080 221-
SJT 060/080/060/082 4211
JCT 062/080/060/082 4321

.SJT...NONE.

04

In the hours before

Special weather statement, May 7, 2:30 PM CDT, 3 hours 29 minutes before
TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-140-
154-155-168>170-072230-

WEST CENTRAL TEXAS HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE SAN ANGELO TX
230 PM CDT MON MAY 7 2001

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN WEST CENTRAL
TEXAS THROUGH THIS EVENING...

A COLD FRONT WILL MOVE SLOWLY SOUTH INTO WEST CENTRAL TEXAS THIS
AFTERNOON. WITH WARM AND UNSTABLE AIR IN PLACE...SCATTERED
THUNDERSTORMS WILL DEVELOP AS THE FRONT APPROACHES AND INTERSECTS
WITH OUTFLOW BOUNDARIES WHICH MOVED INTO THE REGION LAST NIGHT.
THERE IS A SLIGHT RISK THAT SOME OF THESE STORMS WILL BE SEVERE. THE
PRIMARY THREAT FROM THESE STORMS WILL BE LARGE HAIL AND DAMAGING
WINDS. WITH FAIRLY WEAK STEERING CURRENTS ALOFT...HEAVY RAIN WILL BE
POSSIBLE FROM SLOW MOVING STORMS.

SPOTTER ACTIVATION MAY BE REQUIRED.

FOR THE SOUTHWEST TEXAS AND SOUTHEAST NEW MEXICO OUTLOOK SEE PRODUCT
LBBSPSMAF. FOR THE SOUTH PLAINS OUTLOOK SEE PRODUCT LBBSPSLBB. FOR
THE CENTRAL OKLAHOMA OUTLOOK SEE PRODUCT OKCSPSOKC. FOR THE NORTH
TEXAS OUTLOOK SEE PRODUCT FTWSPSFTW. FOR THE SOUTH CENTRAL TEXAS
OUTLOOK SEE PRODUCT SATSPSSAT.

15

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 7, 2:41 PM CDTSevere Thunderstorm WarningSJTMenard49 min
May 7, 6:26 PM CDTSevere Thunderstorm WarningSJTMcCulloch34 min

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.