Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 103, NWS San Angelo, TX

May 30, 2001Sterling County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 30, 2001, 7:25 PM CDT for Sterling County, Texas. It was in force for 65 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 30, 2001, 7:25 PM CDT (00:25 UTC)
Expired
May 30, 2001, 8:30 PM CDT
In force
65 min
Issued by
NWS San Angelo, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Sterling County, TX

The radar

The San Angelo radar (KSJT), 73 km from the middle of the area, began a volume at 00:29 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.

IssuedProductOfficeLasted
May 30, 5:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 0.4 hours before the alert went out and 109 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, Midland Regional, TX at 00:00Z on 2001-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 301 joules per kilogram.LCLEL10008507005003002001001 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, Midland Regional, TX at 00:00Z on 2001-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 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
301 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
3693 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 30, 7:05 PM CDT, 20 minutes earlier.

Area forecast discussion, May 30, 7:05 PM CDT, 20 minutes before
WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
705 PM CDT WED MAY 30 2001

UPDATED ZONES TO INCLUDE SEVERE THUNDERSTORM WATCH FOR THE BIG
COUNTRY AND NORTHERN CONCHO VALLEY UNTIL 11 PM TONIGHT.

LATEST LAMP ANALYSIS OF SURFACE WINDS AND STREAMLINES INDICATES
CONVERGENCE ALONG THE FRONTAL BOUNDARY. HAVE RECEIVED REPORTS OF
HAIL IN JONES COUNTY AND FISHER COUNTY RANGING FROM QUARTER SIZE TO
GOLFBALL SIZE.

.SJT...SEVERE THUNDERSTORM WATCH TXZ049-054-064>066
       098-099-113-114-127-128 UNTIL 11 PM TONIGHT.

HUBER

********  200 PM CDT WED MAY 30 2001 DISCUSSION FOLLOWS  *********

PER LATEST MESOSCALE ANALYSIS AND LOCAL WARNING RADARS...COLD FRONT
EXTENDED FROM STERLING CITY AND SWEETWATER...TO HASKELL AND
THROCKMORTON AT 18Z. PER MSAS 3 HR PRES CHANGE...FRONT PULLING UP
STATIONARY. AIR MASS IN VICINITY EXTREMELY UNSTABLE WITH LIFTED
INDICES TO MINUS 10...AND GOES SATELLITE BASED CAPES IN EXCESS OF
5000 J/KG. PER WATER VAPOR IMAGERY...SHORTWAVE TROUGH EMBEDDED IN
NORTHWEST FLOW EVIDENT OVER CENTRAL COLORADO.

MESOETA THE MODEL OF CHOICE...SIMPLY DUE TO BETTER RESOLUTION OF LOW
LEVEL FEATURES AND TIMING OF APPROACHING SHORTWAVE TROUGH. PRESENT
INDICATIONS SUGGEST CAP WILL ERODE NEAR THE STALLED FRONT LATE THIS
AFTERNOON AND EARLY THIS EVENING...ALLOWING FOR EXPLOSIVE
THUNDERSTORM DEVELOPMENT. SPC HAS UPGRADED PORTIONS OF THE BIG
COUNTRY INTO THE MODERATE CATEGORY. EVENTUALLY...A TRANSITION TOWARD
AN MCS IS EXPECTED LATE THIS EVENING AND OVERNIGHT AS THE SHORTWAVE
TROUGH CATCHES UP TO THE SOUTHWARD SINKING COLD FRONT. SO FOR THE
REMAINDER OF WEST CENTRAL TEXAS...EXPECT SOME MUCH NEEDED RAINFALL
AND STRONG GUSTY WINDS...PERHAPS REACHING SEVERE LIMITS.

DEEP MOISTURE HAS BEEN PROBLEMATIC OF LATE. APPEARS THIS WILL NOT BE
THE CASE TONIGHT AS PRECIPITABLE WATER VALUES CLIMB TO NEAR 2.00
INCHES. SO UNLIKE THE HIGH BASED SPRINKLES OF LATE...GULLY WASHERS A
GOOD BET WITH AMOUNTS APPROACHING TWO INCHES LOCALLY.

THE ATMOSPHERE WILL REMAIN MOIST AND UNSTABLE ON THURSDAY...WITH
RESIDUAL BOUNDARIES PROVIDING THE FOCUS. 20 POPS PLANNED ACROSS THE
BOARD. AIR MASS BECOMES CAPPED THURSDAY NIGHT AND FRIDAY. AVN HINTS
AT ANOTHER MCS FRIDAY NIGHT...BUT WE/LL NOT MENTION AS MID LEVEL
TEMPERATURES REMAIN RATHER WARM.

PRELIM CCF...

ABI 065/083/063/087  7210
SJT 067/085/062/090  5210
JCT 069/082/064/088  5210

.SJT...NONE.

17

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 7:15 PM CDTSevere Thunderstorm WarningSJTNolan60 min
May 30, 7:30 PM CDTSevere Thunderstorm WarningSJTTaylor60 min
May 30, 7:38 PM CDTSevere Thunderstorm WarningSJTCallahan52 min
May 30, 7:52 PM CDTSevere Thunderstorm WarningSJTCoke68 min
May 30, 8:26 PM CDTSevere Thunderstorm WarningSJTRunnels64 min
May 30, 8:31 PM CDTSevere Thunderstorm WarningSJTTaylor59 min
May 30, 8:34 PM CDTSevere Thunderstorm WarningSJTSterling56 min
May 30, 8:47 PM CDTSevere Thunderstorm WarningSJTColeman58 min
May 30, 9:00 PM CDTSevere Thunderstorm WarningSJTCoke60 min
May 30, 10:00 PM CDTSevere Thunderstorm WarningSJTHaskell60 min
May 30, 10:01 PM CDTSevere Thunderstorm WarningSJTColeman29 min
May 30, 10:12 PM CDTSevere Thunderstorm WarningSJTBrown63 min
May 30, 11:07 PM CDTSevere Thunderstorm WarningSJTThrockmorton68 min
May 31, 12:56 AM CDTSevere Thunderstorm WarningSJTFisher34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.