Alert archive / Texas / Flash Flood Warnings in 1996

Flash Flood Warning 20, NWS San Angelo, TX

August 28, 1996Runnels County, Texas

NWS San Angelo, TX issued this flash flood warning at Aug 28, 1996, 8:03 PM CDT for Runnels County, Texas. It was in force for 117 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
Aug 28, 1996, 8:03 PM CDT (01:03 UTC)
Expired
Aug 28, 1996, 10:00 PM CDT
In force
117 min
Issued by
NWS San Angelo, TX
Area
Whole counties

County Runnels County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.1 hours before the alert went out and 276 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, Fort Worth, TX at 00:00Z on 1996-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1022 joules per kilogram.LCLLFCEL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 1996-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
1022 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
677 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 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 Aug 28, 1:50 PM CDT, 6 hours 13 minutes earlier.

Area forecast discussion, Aug 28, 1:50 PM CDT, 6 hours 13 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
150 PM CDT WED AUG 28 1996

SHOWERS AND THUNDERSTORMS STAYING JUST TO THE NORTH AND EAST OF THE
COUNTY WARNING AREA SO FAR TODAY.  THEREFORE...WITH VERY LIGHT
PRECIPITATION AMOUNTS FOR THE PAST 12 HOURS...WILL NOT BE TOO
CONCERNED ABOUT FLASH FLOOD POTENTIAL FOR THIS FORECAST PACKAGE.
THIS MAY BE A CONCERN FOR THE MORNING PACKAGE AS A SLOW MOVING
SHORTWAVE SAGS SOUTHWARD ACROSS WEST CENTRAL TEXAS OVER THE NEXT 24
HOURS.  LATEST MODEL RUNS INDICATE THIS IS A STRONGER SHORTWAVE
MOVING INTO NORTHWEST TEXAS THAN WAS FORECAST ON PREVIOUS RUNS.
FAVOR THE ETA AND AVIATION MODELS AS THE ETA VERIFIED BEST FROM THE
PREVIOUS RUN AND NGM APPEARS TOO FAST.  SATELLITE DOES SHOW A NICE
WIND MAXIMUM PUSHING INTO THE TEXAS PANHANDLE WHICH SHOULD HELP TO
ORGANIZE THINGS A BIT OVER NORTHWEST TEXAS...AND ADAP CURRENTLY HAS
LIFTED INDICES AROUND -6 DEGREES CELSIUS.  BUT WITH SOUNDINGS
SHOWING A TROPICAL AIRMASS WITH A NEARLY MOIST ADIABATIC LAPSE
RATE NOT TO MENTION LIGHTER WINDS ALOFT...DONT SEE ANYTHING BECOMING
SEVERE IN THE COUNTY WARNING AREA.

POOR PERFORMANCE OF THE NESTED MODEL CAN BE SEEN ON GUIDANCE NUMBERS
WHICH APPEAR MUCH TOO DRY.  AVIATION GUIDANCE LOOKS BEST ON BOTH
TEMPS AND POPS.  HIGH RELATIVE HUMIDITIES THROUGH THE NEXT COUPLE
PERIODS WOULD IMPLY LOW CLOUDS AND THEREFORE MILD TEMPERATURES AND
MOSTLY CLOUDY SKIES TOMORROW.

ABI 067/081 74
SJT 068/081 55

OAKS

In the hours before

Special weather statement, Aug 28, 2:30 PM CDT, 5 hours 33 minutes before
TXZ049-053-054-064>066-071>073-076>078-113-114-127-128-139-140-
154-155-168>170-291335-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
228 PM CDT WED AUG 28 1996

...SCATTERED SHOWERS WITH EMBEDDED NONSEVERE THUNDERSTORMS ARE
EXPECTED ACROSS MUCH OF WEST CENTRAL TEXAS THIS AFTERNOON THROUGH
TONIGHT...

ABUNDANT TROPICAL MOISTURE WILL COMBINE WITH AN UPPER LEVEL
DISTURBANCE RESULTING IN SCATTERED SHOWERS AND THUNDERSTORMS
ACROSS MUCH OF WEST CENTRAL TEXAS THIS AFTERNOON.  WITH LIGHT WINDS
IN THE UPPER LEVELS OF THE ATMOSPHERE...ANY THUNDERSTORMS THAT
DEVELOP ARE EXPECTED TO REMAIN BELOW SEVERE LEVELS.  HOWEVER...THESE
STORMS WILL BE SLOW MOVERS WITH A POTENTIAL OF PRODUCING VERY HEAVY
DOWNPOURS IN A SHORT PERIOD OF TIME.  DANGEROUS LIGHTNING AND WIND
GUST TO 40 MPH ARE ALSO POSSIBLE WITH THE THUNDERSTORMS.

SPOTTER ACTIVATION IS NOT ANTICIPATED.

OAKS
Special weather statement, Aug 28, 3:50 PM CDT, 4 hours 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 5:16 AM CDTFlash Flood WarningSJTKimble, Sutton3 hr
Aug 29, 6:15 AM CDTFlash Flood WarningSJTKimble2 hr
Aug 29, 7:58 AM CDTFlash Flood WarningSJTKimble2 hr
Aug 29, 8:33 AM CDTFlash Flood WarningSJTIrion3 hr
Aug 29, 8:41 AM CDTFlash Flood WarningSJTTom Green3 hr
Aug 29, 9:50 AM CDTFlash Flood WarningSJTKimble, Menard, Schleicher6 hr
Aug 29, 9:50 AM CDTFlash Flood WarningSJTMason6 hr
Aug 29, 10:17 AM CDTFlash Flood WarningSJTIrion, Tom Green8 hr
Aug 29, 2:45 PM CDTTornado WarningSJTCallahan60 min

Nearby

Flash Flood Warnings in Texas, 1996Every flash flood warning in 1996

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.