Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 92, NWS San Angelo, TX

May 3, 2002San Saba County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 3, 2002, 8:22 AM CDT for San Saba County, Texas. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 3, 2002, 8:22 AM CDT (13:22 UTC)
Expired: May 3, 2002, 8:45 AM CDT
In force: 23 min
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

County San Saba County, TX

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

Del Rio, TX (KDRT), launched 12:00Z, 1.4 hours before the alert went out and 319 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: 3042 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KSJT 031322
SVRSJT
TXC411-031345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
822 AM CDT FRI MAY 3 2002

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SAN SABA COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 845 AM CDT

* AT 815 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES SOUTHWEST OF SAN SABA...MOVING EAST AT
  50 MPH.

DIME TO NICKEL SIZE HAIL AND WIND GUSTS UP TO 60 MPH CAN BE EXPECTED
WITH THIS STORM. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON
THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

LAT...LON 3123 9882 3106 9875 3132 9766 3158 9776

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 3, 7:20 AM CDT, 1 hour 2 minutes earlier.

Area forecast discussion, May 3, 7:20 AM CDT, 1 hour 2 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN ANGELO TX
720 AM CDT FRI MAY 3 2002

GIVEN THE LATEST RADAR TRENDS...UPDATED TO REMOVE POPS FROM
EVERYWHERE BUT THE SOUTHEAST COUNTIES. HOWEVER A SEVERE THUNDERSTORM
WATCH REMAINS FOR BROWN COUNTY. EXPECT ANOTHER UPDATE TO REMOVE POPS
FROM THE REMAINING COUNTIES BY 9 AM.

EARLY MORNING DISCUSSION BELOW.
--------------------------------------------------------------

AN 850MB JET IS BEGINNING TO DEVELOP OVER THE SOUTHERN COUNTIES.
ASSOCIATED SHOWERS AND THUNDERSTORMS ARE DEVELOPING ALONG AND NORTH
OF THE 850MB MOISTURE CONVERGENCE LINE. AT 06Z THIS LINE STRETCHED
FROM THE WESTERN TIP OF TOM GREEN COUNTY EASTWARD THROUGH RUNNELS
AND BROWN COUNTIES. A FEW OF THESE STORMS MAY BECOME SEVERE WITH
LARGE HAIL AND STRONG WINDS POSSIBLE. THIS AREA WILL LIFT SLOWLY
NORTHEAST EARLY THIS MORNING BEFORE BEING SWEPT TO THE EAST BY AN
850MB TROUGH/DRYLINE MOVING IN FROM THE WEST BY MID MORNING.
OTHERWISE...THE REST OF FRIDAY WILL BE DRY WITH TEMPS NEAR
NORMAL...WITH DEWPOINTS IN THE LOW 40S TO NEAR 50F ACROSS THE ENTIRE
AREA.

SATURDAY/SATURDAY NIGHT ANOTHER WAVE OF MOISTURE WILL WORK ITS WAY
NORTH ACROSS WEST CENTRAL TEXAS AS A VIGOROUS SHORT WAVE SLIDES
NORTHEAST ACROSS THE REGION. THIS WILL HELP TO TRIGGER SCATTERED
SHOWERS AND THUNDERSTORMS DURING THE AFTERNOON/EVENING SOUTH AND
DURING THE EVENING/OVERNIGHT NORTH. WILL HAVE TO WATCH FOR SEVERE
POTENTIAL WITH THESE STORMS...WITH STRONG THETA-E ADVECTION AND GOOD
LOW LEVEL CONVERGENCE.

LEFT THE EXTENDED AS IS WITH THE MENTION OF A SLIGHT CHANCE OF
THUNDERSTORMS MONDAY THROUGH WEDNESDAY FOR ALL AREAS. THE BEST
CHANCES WILL BE ALONG THE DRYLINE IN THE BIG COUNTRY DURING THE
AFTERNOONS/EARLY EVENINGS...WITH VERY SLIM CHANCES (ISOLATED AT
BEST) SOUTH OF THE BIG COUNTRY. WILL BUMP UP HIGHS SLIGHTLY ALL
AREAS GIVEN THE 850MB TEMPS INDICATING SLIGHTLY WARMER THAN PREVIOUS
RUNS.

ABI 084/058/085/064 3034
SJT 086/059/086/067 2032
JCT 088/061/086/068 1032

.SJT...SEVERE THUNDERSTORM WATCH FOR BROWN COUNTY TIL 10 AM CDT.

24

In the hours before

Local storm report, May 3, 4:18 AM CDT, 4 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO, TX
418 AM CDT FRI MAY 3 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0345 AM    NOVICE                    TX   1.75 INCH HAIL
05/03/02   COLEMAN                        GOLF BALL SIZE HAIL

Special weather statement, May 3, 5:34 AM CDT, 2 hours 48 minutes before

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-154-
155-168>170-031415-

WEST CENTRAL TEXAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
534 AM CDT FRI MAY 3 2002

...SCATTERED THUNDERSTORMS TO CONTINUE ACROSS WEST CENTRAL TEXAS
THIS MORNING...

A FRONTAL BOUNDARY CONTINUES ACROSS THE HILL COUNTRY THIS MORNING
...SEPARATING COOLER AIR ACROSS WEST CENTRAL TEXAS FROM THE WARMER
AIR ALONG THE GULF COAST. HOWEVER...A PASSING UPPER LEVEL
DISTURBANCE HAS BEGUN TO PULL THIS WARM AND UNSTABLE AIR MASS UP AND
OVER THE FRONTAL BOUNDARY...PRODUCING SCATTERED THUNDERSTORMS. GIVEN
THE AMOUNT OF INSTABILITY...ONE OR TWO OF THESE STORMS MAY REACH
SEVERE LEVELS...WITH LARGE HAIL THE PRIMARY THREAT. THE MOST LIKELY
AREA TO SEE A STORM REACH SEVERE LEVELS WILL BE ACROSS THE EASTERN
SECTIONS OF THE AREA...MAINLY EAST OF A BROWNWOOD TO SAN SABA LINE.
THE THREAT OF STORMS SHOULD DIMINISH BY LATE MORNING...AS THE UPPER
LEVEL DISTURBANCE PASSES OFF TO THE NORTHEAST.

ALTHOUGH A FEW STORMS MAY BRIEFLY REACH SEVERE LEVELS...GIVEN THE
ISOLATED NATURE TO THE ACTIVITY AND ITS SHORT LIVED NATURE...SPOTTER
ACTIVATION IS NOT ANTICIPATED.

FOR ADDITIONAL INFORMATION PLEASE SEE STATEMENTS AND OUTLOOKS FROM
NATIONAL WEATHER SERVICE OFFICES ACROSS TEXAS...OKLAHOMA...AND NEW
MEXICO.

Special weather statement, May 3, 8:08 AM CDT, 14 minutes before

TXZ140-031345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
808 AM CDT FRI MAY 3 2002

...SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR BROWN COUNTY...

THE SEVERE THUNDERSTORMS HAVE MOVED EAST OF BROWN COUNTY...THUS THE
SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED.

27/BRAZZELL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 1:46 AM CDT	Severe Thunderstorm Warning	SJT	Runnels	44 min
May 3, 2:24 AM CDT	Severe Thunderstorm Warning	SJT	Coke	51 min
May 3, 2:41 AM CDT	Severe Thunderstorm Warning	SJT	Coleman	34 min
May 3, 3:05 AM CDT	Severe Thunderstorm Warning	SJT	Callahan	40 min
May 3, 3:40 AM CDT	Severe Thunderstorm Warning	SJT	Coleman	35 min
May 3, 4:02 AM CDT	Severe Thunderstorm Warning	SJT	Callahan	28 min
May 3, 4:10 AM CDT	Severe Thunderstorm Warning	SJT	Brown	35 min

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; the sounding from the Mesonet's radiosonde archive.