Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 48, NWS San Angelo, TX

July 6, 2002Shackelford County, Texas

NWS San Angelo, TX issued this flash flood warning at Jul 6, 2002, 3:21 AM CDT for Shackelford County, Texas. It was in force for 6 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: Jul 6, 2002, 3:21 AM CDT (08:21 UTC)
Expired: Jul 6, 2002, 9:00 AM CDT
In force: 6 hr
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

County Shackelford 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, 8.4 hours before the alert went out and 190 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: 1406 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 955 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSJT 060821
FFWSJT
TXC417-061400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
320 AM CDT SAT JUL 6 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 900 AM CDT

* AT 313 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN 9 MILES WEST OF ALBANY.  THE AREA OF HEAVY RAIN WAS NEARLY
  STATIONARY. WIDESPREAD SHOWERS AND THUNDERSTORMS EXTENDED ACROSS THE
  REST OF SHACKELFORD COUUNTY.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE NEAR...
   10 MILES NORTHWEST OF ALBANY AT 440 AM CDT

* RAINFALL AMOUNTS OF 1 TO 2 INCHES HAVE FALLEN JUST WEST AND SOUTHWEST 
  OF ALBANY. RAINFALL RATES OF 1/2 TO 1 INCH PER HOUR WILL CONTINUE SEVERAL
  HOURS AND CAUSE FLASH FLOODING. UP TO 5 INCHES IS POSSIBLE IN LOCAL AREAS 
  THROUGH 9 AM.

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.

LAT...LON 3295 9916 3294 9957 3253 9958 3253 9914

1 follow-up statement

000 
WGUS74 KSJT 061223
FFSSJT
TXC059-151-207-253-417-441-061400-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
720 AM CDT SAT JUL 6 2002

...FLASH FLOOD WARNINGS REMAIN IN EFFECT FOR JONES...TAYLOR... 
SHACKELFORD...AND HASKELL COUNTIES UNTIL 900 AM CDT...AND FOR FISHER 
AND CALLAHAN COUNTIES UNTIL 1215 PM...

AT 715 AM...HEAVY RAINFALL EXTENDED FROM ROTAN TO MERKEL TO BUFFALO 
GAP...AND FROM TUSCOLA TO CROSS PLAINS. THIS AREA WILL SEE 2 TO 4 
INCHES OF RAINFALL THROUGH 9 AM.

RADAR ESTIMATED THAT 3 TO 6 INCHES OF RAIN HAVE FALLEN OVER PARTS OF 
THE BIG COUNTRY THIS MORNING. OVER FIVE INCHES HAS FALLEN IN ABILENE.

NUMEROUS ROAD CLOSINGS HAVE OCCURRED IN ABILENE. AT 7 AM THE 
UNDERPASS AT FIRST AND SOUTH STREETS WAS FLOODED. FLOODING WAS ALSO 
BEING REPORTED ALONG CAT CLAW CREEK....CEDAR CREEK...AND BUTTON 
WILLOW CREEK ON THE SOUTH SIDE OF ABILENE. 

FLOODING OF LOW WATER CROSSINGS HAS OCCURRED OVER MUCH OF THE BIG 
COUNTRY THIS MORNING. WATER OF ONLY 2 FEET DEPTH CAN CARRY AWAY 
VEHICLES.

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 Jul 6, 2:57 AM CDT, 24 minutes earlier.

Area forecast discussion, Jul 6, 2:57 AM CDT, 24 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
257 AM CDT SAT JUL 6 2002

TROPICAL AIRMASS REMAINS IN PLACE WITH DEWPOINTS IN THE
70S...BOUNDARIES GALORE...THE SEMI-PERMANENT SHEAR AXIS JUST EAST OF
ABI...AN UPPER LOW OVER NM...UPPER DIFFLUENT AREA OVER MOST OF WEST
TX.  ALL SPELL CONTINUED CHANCES FOR RAIN.

SHEAR AXIS HAS GONE THROUGH ITS NIGHTTIME FLARE UP OVER OUR
NORTHEASTERN COUNTIES...WITH BROWN COUNTY THE TX RAINFALL WINNER
WITH OVER 5-6 INCHES OF RAIN. ACTIVE FLOODING AND RESCUES OCCURRING
AT THIS TIME IN BROWN AND COLEMAN COUNTIES.  THIS FEATURE SHOULD BE
THE FOCUS FOR TSTMS ACROSS THE EASTERN BIG COUNTRY...AND SINCE THE
SYSTEM HAS MOVED A BIT FURTHER NORTH...WILL SHIFT THE FOCUS OF THE
FLASH FLOOD WATCH FURTHER NORTH.  PLAN ON TAKING OUR SOUTHEASTERN
COUNTIES OUT OF THE FF WATCH.  THO IF TSTMS BUILD THIS
AFTERNOON...FLOOD WARNINGS WILL BE NEEDED.

NO BIG CHANCES OVER THE WEEKEND AS RAIN CHANCES ABOUND.  WILL
KEEP LOWEST POPS IN OUR SOUTHWESTERN COUNTIES...WHERE UNFORTUNATELY
LITTLE BENEFICIAL RAIN HAS FALLEN THIS WEEK DESPITE THE ATYPICAL WET
ENVIRONMENT.  IN GENERAL LOWER POPS FOR SOUTH AS SHEAR AXIS AND NM
LOW ENERGY WILL FOCUS BEST RAIN CHANCES IN OUR NORTHERN COUNTIES.

MRF STILL HOLDING FIRM ON PATTERN WITH SFC HIGH OVER THE ROCKIES AND
DECENT RAIN CHANCES THROUGH MON/TUE.  WILL CONTINUE TO SHOW SLOW
DRYING...BY THE END OF THE FORECAST PERIOD...MUCH MORE TYPICAL
WEATHER TAKES HOLD WITH NO REAL CHANCE OF RAIN AND TEMPS 95-100 BY
LATE IN THE WEEK.

CCF PRELIMS...

ABI 084/070/088/070 8542
SJT 090/070/093/070 4442
JCT 090/070/093/070 4332

.SJT...FLASH FLOOD WATCH TODAY FOR MCCULLOCH...SAN SABA...
BROWN...COLEMAN...RUNNELS...CALLAHAN...TAYLOR...JONES...SHACKELFORD
...HASKELL AND THROCKMORTON COUNTIES.

25

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 12:20 AM CDT	Flash Flood Warning	SJT	Brown	6 hr
Jul 6, 1:09 AM CDT	Flash Flood Warning	SJT	Callahan, Coleman	5 hr
Jul 6, 3:06 AM CDT	Flash Flood Warning	SJT	Taylor	6 hr
Jul 6, 4:00 AM CDT	Flash Flood Warning	SJT	Haskell, Jones	5 hr
Jul 6, 6:18 AM CDT	Flash Flood Warning	SJT	Brown, Callahan, Coleman	6 hr
Jul 6, 6:28 AM CDT	Flash Flood Warning	SJT	Fisher	6 hr
Jul 6, 8:24 AM CDT	Flash Flood Warning	SJT	Nolan	4 hr
Jul 6, 8:53 AM CDT	Flash Flood Warning	SJT	Jones, Taylor	6 hr

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.