Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 69, NWS San Angelo, TX

April 25, 2002Shackelford County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 25, 2002, 2:35 PM CDT for Shackelford County, Texas. It was in force for 55 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 25, 2002, 2:35 PM CDT (19:35 UTC)
Expired: Apr 25, 2002, 3:30 PM CDT
In force: 55 min
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

County Shackelford County, TX

What was reported inside it

Time	Report	Where	Remark
Apr 25, 2:41 PM CDT	Hail 0.75	Albany, 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.

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

Fort Worth, TX (KFWD), launched 12:00Z, 7.6 hours before the alert went out and 188 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1491 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 235 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KSJT 251935
SVRSJT
TXC417-252030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
235 PM CDT THU APR 25 2002

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

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

* UNTIL 330 PM CDT

* AT 233 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES WEST OF ALBANY...MOVING NORTHEAST AT 5
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   HIGHWAY 283 NEAR ALBANY AT 250 PM CDT
   

HAILSTONES AS LARGE AS ONE INCH 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 3274 9949 3261 9933 3280 9910 3294 9911
          3295 9927

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 Apr 25, 11:44 AM CDT, 2 hours 51 minutes earlier.

Area forecast discussion, Apr 25, 11:44 AM CDT, 2 hours 51 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN ANGELO TX
1144 AM CDT THU APR 25 2002

THUNDERSTORMS HAVE INCREASED IN COVERAGE...AND HAVE BECOME NUMEROUS
ACROSS THE BIG COUNTRY LATE THIS MORNING. ISENTROPIC LIFT AND
SHORTWAVE IMPULSES ALOFT ARE AIDING IN THIS PROCESS. ISOLATED SHOWERS
OCCURRING FARTHER SOUTH. TEMPERATURES HAVE REMAINED NEARLY STEADY
THROUGH THE MORNING...AND HAVE ACTUALLY FALLEN A COUPLE OF DEGREES AT
ABILENE. WITH PERSISTENT CLOUDCOVER THROUGH THE AFTERNOON AND WEDGE
OF COOL AIR REMAINING OVER THE REGION...EXPECT LITTLE TEMPERATURE
RECOVERY. BASED ON THUNDERSTORM AND TEMPERATURE TRENDS...WILL SEND A
ZONE UPDATE TO BOOST POPS ACROSS THE BIG COUNTRY. WILL ALSO CUT HIGH
TEMPERATURES FOR THIS AFTERNOON ACROSS WEST CENTRAL TX.

.SJT...NONE.

19

In the hours before

Special weather statement, Apr 25, 2:30 PM CDT, 5 minutes before

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-140-
154-155-168>170-252315-

WEST CENTRAL TEXAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
230 PM CDT THU APR 25 2002

...A FEW THUNDERSTORMS MAY APPROACH SEVERE LIMITS OVER WEST CENTRAL
TEXAS THIS AFTERNOON AND TONIGHT...

NUMEROUS THUNDERSTORMS ARE EXPECTED OVER THE BIG COUNTRY NORTH OF
INTERSTATE 20 THIS AFTERNOON. SCATTERED STORMS WILL OCCUR FARTHER
SOUTH ACROSS WEST CENTRAL TEXAS. THE CHANCE FOR STORMS WILL CONTINUE
TONIGHT...AND THE BEST COVERAGE WILL BE OVER THE BIG COUNTRY.

A FEW STORMS MAY APPROACH SEVERE LIMITS...PRODUCING HAIL UP TO DIME
SIZE.

SPOTTER ACTIVATION IS NOT ANTICIPATED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 8:01 PM CDT	Severe Thunderstorm Warning	SJT	Menard	44 min
Apr 25, 11:58 AM CDT	Flash Flood Warning	SJT	Shackelford	2 hr
Apr 25, 12:04 PM CDT	Flash Flood Warning	SJT	Shackelford	116 min
Apr 25, 12:52 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	38 min
Apr 25, 1:14 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	16 min
Apr 25, 2:00 PM CDT	Flash Flood Warning	SJT	Shackelford	3 hr
Apr 25, 5:01 PM CDT	Flash Flood Warning	SJT	Shackelford	3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.