Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 14, NWS San Angelo, TX

May 25, 2002Throckmorton County, Texas

NWS San Angelo, TX issued this flash flood warning at May 25, 2002, 4:29 AM CDT for Throckmorton County, Texas. It was in force for 4 hr. 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 25, 2002, 4:29 AM CDT (09:29 UTC)
Expired: May 25, 2002, 8:30 AM CDT
In force: 4 hr
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

County Throckmorton County, TX

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood 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 00:00Z, 9.5 hours before the alert went out and 193 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: 1270 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1154 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSJT 250929
FFWSJT
TXC447-251330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
426 AM CDT SAT MAY 25 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THROCKMORTON COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 830 AM CDT

* AT 423 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY OVER WESTERN THROCKMORTEN COUNTY. THE 
AREA OF HEAVY RAIN WAS NEARLY STATIONARY.

* THIS HEAVY RAIN WILL AFFECT HIGHWAY 300 TO THE WEST OF ALBANY. 
THERE WILL ALSO BE MODERATE WITHIN BANK RISES ON THE CLEAR FORK 
BRAZOS RIVER.

DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THE WATER DEPTH
MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. DO NOT ATTEMPT TO
DRIVE AROUND BARRICADES. MOST FLASH FLOOD DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3334 9940 3311 9946 3305 9926 3314 9903

1 follow-up statement

000 
WGUS74 KSJT 251037
FFSSJT
TXC447-251330-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
534 AM CDT SAT MAY 25 2002

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THROCKMORTON COUNTY UNTIL 830 AM 
CDT...

ALTHOUGH THE HEAVY RAINS HAVE ENDED OVER WESTERN THROCKMORTON 
COUNTY...RUNOFF IS NOT YET COMPLETE AND RAPID RISES ON CREEKS AND 
STREAMS CAN BE EXPECTED FOR THE NEXT COUPLE OF HOURS. MODERATE 
WITHIN BANK RISES CAN ALSO BE EXPECTED OF THE CLEAR FORK OF THE 
BRAZOS RIVER.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at May 25, 4:06 AM CDT, 23 minutes earlier.

Area forecast discussion, May 25, 4:06 AM CDT, 23 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION...CORRECTION
NATIONAL WEATHER SERVICE SAN ANGELO TX
406 AM CDT SAT MAY 25 2002

DISCUSSION CUT SHORT DUE TO ONGOING SEVERE WEATHER. COLD FRONT
APPEARS TO HAVE REACHED THE NORTHERN BIG COUNTRY EARLY THIS MORNING.
SEVERE THUNDERSTORMS WITH GOLF BALL SIZE HAIL OR LARGER CONTINUE TO
DEVELOP OVER HASKELL COUNTY NEAR THE COLD FRONT. REPEAT CELLS ACROSS
HASKELL...THROCKMORTON AND SHACKELFORD COUNTIES TROUBLESOME...AND MAY
RESULT IN SIGNIFICANT FLOODING BY DAWN. WE/LL CONTINUE TO MONITOR.

ETA/AVN IN GOOD AGREEMENT DROPPING COLD FRONT TO NEAR INTERSTATE 10
BY LATE THIS AFTERNOON. SB CIN NIL AFTER 21Z...SO EXPECT WIDELY
SCATTERED DEVELOPMENT...POSSIBLY SEVERE...MAINLY SOUTH OF A SAN ANGELO
TO SAN SABA LINE. 300 MB DIVERGENCE/850 MB CONVERGENCE COUPLET PRODG
OVER THE FORECAST AREA TONIGHT. STRONG SYNOPTIC SCALE LIFT SHOULD HAVE
NO TROUBLE GENERATING NUMEROUS SHOWERS AND THUNDERSTORMS...ESPECIALLY
WITH SUCH A MOIST...UNSTABLE AIRMASS IN PLACE. AVN MODEL HINTS AT YET
ANOTHER MCS SUNDAY NIGHT. COMPLEX OF STORMS SHOULD PRIMARILY AFFECT
THE NORTHERN HALF OF THE AREA. THREAT OF THUNDER CONTINUES INTO THE
EXTENDED...AS AN UPPER LOW PUSHES INTO NORTHEAST TEXAS.

PRELIMS...

ABI 081/064/087/064 2524
SJT 087/064/087/064 2724
JCT 087/066/087/065 2723

.SJT...NONE.

17

In the hours before

Local storm report, May 25, 12:43 AM CDT, 3 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT...UPDATED TO ADD REPORT AT NOLAN
NATIONAL WEATHER SERVICE SAN ANGELO, TX
1243 AM CDT SAT MAY 25 2002

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

0537 PM    SWEETWATER                TX   1.00 INCH HAIL
05/24/02   NOLAN

0540 PM    LONGWORTH                 TX   .88 INCH HAIL
05/24/02   FISHER

0545 PM    3 N SWEETWATER            TX   1.75 INCH HAIL
05/24/02   NOLAN                          DAMAGED WINDSHIELD OF
                                          PATROL CAR ON FISHER/NOLAN
                                          COUNTY LINE

0545 PM    3N SWEETWATER             TX   1.75 INCH HAIL
05/24/02   FISHER                         DAMAGED WINDSHIELD OF
                                          PATROL CAR ON FISHER/NOLAN
                                          COUNTY LINE

0552 PM    SWEETWATER                TX   1.00 INCH HAIL
05/24/02   NOLAN                          QUARTER SIZE HAIL COVERING
                                          THE GROUND

0552 PM    SWEETWATER                TX   1.00 INCH HAIL
05/24/02   NOLAN

0605 PM    SWEETWATER                TX   2.75 INCH HAIL
05/24/02   NOLAN

0610 PM    LONGWORTH                 TX   1.00 INCH HAIL
05/24/02   FISHER

0715 PM    15 S MERKEL               TX   WIND DAMAGE
05/24/02   TAYLOR                         20X40 FOOT OUTBUILDING
                                          DESTROYED

0715 PM    3 S MERKEL                TX   1.00 INCH HAIL
05/24/02   TAYLOR

0730 PM    15 S MERKEL               TX   1.75 INCH HAIL
05/24/02   TAYLOR

0730 PM    NOLAN                     TX   1.75 INCH HAIL
05/24/02   NOLAN                          REPORT BY COOP OBSERVER

0804 PM    2 NE HAPPY VALLEY         TX   TORNADO
05/24/02   TAYLOR

0815 PM    16 SSW ABILENE            TX   WIND DAMAGE
05/24/02   TAYLOR                         BARN BLOWN AWAY

0825 PM    3 E ABILENE               TX   60 MPH TSTM WIND GUST
05/24/02   TAYLOR

0837 PM    2 SE ABILENE              TX   1.75 INCH HAIL
05/24/02   TAYLOR

0838 PM    WINTERS                   TX   1.75 INCH HAIL
05/24/02   RUNNELS

0838 PM    5 W BAIRD                 TX   1.00 INCH HAIL
05/24/02   CALLAHAN

0844 PM    WINTERS                   TX   2.75 INCH HAIL
05/24/02   RUNNELS

0859 PM    WINTERS                   TX   WIND DAMAGE
05/24/02   RUNNELS                        NUMEROUS WINDOWS BLOWN
                                          OUT...LARGE TREE LIMBS
                                          BROKEN

0859 PM    WINTERS                   TX   2.75 INCH HAIL
05/24/02   RUNNELS

0900 PM    12 W BAIRD                TX   1.00 INCH HAIL
05/24/02   CALLAHAN

0915 PM    9 N BALLINGER             TX   WIND DAMAGE
05/24/02   RUNNELS                        LARGE TREE LIMBS
                                          DOWN...PROPANE TANK BLOWN
                                          OVER

0915 PM    CREWS                     TX   1.75 INCH HAIL
05/24/02   RUNNELS

0920 PM    10 NE BALLINGER           TX   TORNADO
05/24/02   RUNNELS                        BRIEF TOUCHDOWN

0946 PM    BENOIT                    TX   1.00 INCH HAIL
05/24/02   RUNNELS

0955 PM    10 NE BALLINGER           TX   WIND DAMAGE
05/24/02   RUNNELS                        LARGE TREE BLOWN ONTO
                                          TRUCK...OUTBUILDINGS
                                          DESTROYED

1045 PM    BALLINGER                 TX   .88 INCH HAIL
05/24/02   RUNNELS

1049 PM    1 N BALLINGER             TX   .88 INCH HAIL
05/24/02   RUNNELS

1053 PM    BALLINGER                 TX   1.75 INCH HAIL
05/24/02   RUNNELS

14

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 7:00 PM CDT	Tornado Warning	SJT	Taylor	60 min
May 24, 7:09 PM CDT	Severe Thunderstorm Warning	SJT	Nolan	66 min
May 24, 7:10 PM CDT	Tornado Warning	SJT	Haskell	65 min
May 24, 7:20 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	55 min
May 24, 7:27 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	78 min
May 24, 7:32 PM CDT	Flash Flood Warning	SJT	Nolan, Taylor	2 hr
May 24, 7:57 PM CDT	Tornado Warning	SJT	Runnels, Taylor	63 min
May 24, 8:09 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	81 min
May 24, 8:43 PM CDT	Tornado Warning	SJT	Callahan	62 min
May 24, 8:57 PM CDT	Tornado Warning	SJT	Runnels	63 min
May 24, 9:03 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	72 min
May 24, 9:44 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	61 min
May 24, 9:44 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	76 min
May 24, 9:54 PM CDT	Flash Flood Warning	SJT	Runnels	3 hr
May 24, 10:00 PM CDT	Tornado Warning	SJT	Runnels	75 min
May 24, 10:20 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	70 min
May 24, 11:13 PM CDT	Tornado Warning	SJT	Concho, Runnels	62 min
May 25, 12:20 AM CDT	Severe Thunderstorm Warning	SJT	Haskell	70 min
May 25, 12:36 AM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	69 min
May 25, 12:38 AM CDT	Tornado Warning	SJT	Haskell	67 min
May 25, 1:15 AM CDT	Tornado Warning	SJT	Throckmorton	60 min
May 25, 1:30 AM CDT	Tornado Warning	SJT	Shackelford	60 min
May 25, 2:17 AM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	28 min
May 25, 2:31 AM CDT	Severe Thunderstorm Warning	SJT	Shackelford	59 min
May 25, 2:44 AM CDT	Tornado Warning	SJT	Shackelford	61 min
May 25, 2:49 AM CDT	Severe Thunderstorm Warning	SJT	Haskell, Throckmorton	56 min
May 25, 3:44 AM CDT	Severe Thunderstorm Warning	SJT	Shackelford	46 min
May 25, 8:21 AM CDT	Severe Thunderstorm Warning	SJT	Brown	69 min
May 25, 9:27 AM CDT	Severe Thunderstorm Warning	SJT	Brown	33 min
May 25, 4:36 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	69 min
May 25, 5:29 PM CDT	Severe Thunderstorm Warning	SJT	Coke	61 min
May 25, 6:31 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch	59 min
May 25, 6:34 PM CDT	Severe Thunderstorm Warning	SJT	Runnels	56 min
May 25, 6:49 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	56 min
May 25, 6:53 PM CDT	Severe Thunderstorm Warning	SJT	Coke	67 min

Nearby

Flash Flood Warnings in Texas, 2002 Every flash flood 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.