Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 3, NWS Austin/San Antonio, TX

April 7, 2002Wilson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 7, 2002, 11:25 PM CDT for Wilson 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: Apr 7, 2002, 11:25 PM CDT (04:25 UTC)
Expired: Apr 8, 2002, 5:15 AM CDT
In force: 6 hr
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 67 km from the middle of the area, began a volume at 04:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 4.4 hours before the alert went out and 176 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: 2444 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 655 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 080425
FFWSAT
TXC493-081015-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1122 PM CDT SUN APR 7 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WILSON COUNTY

* UNTIL 515 AM CDT

* AT 1122 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY   
RAIN WAS OCCURRING IN AND AROUND FLORESVILLE IN WILSON COUNTY.  
RADAR ESTIMATES BETWEEN 3 AND 6 INCHES OF RAIN HAS FALLEN IN THE 
COUNTY DURING THE EVENING.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL 
CREEKS AND LOW-WATER CROSSINGS...ROADS...HIGHWAYS AND UNDERPASSES. 
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS 
AND STREAMS AND OTHER LOW-LYING AREAS ARE SUBJECT TO FLASH FLOODING.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED 
QUICKLY.  MOVE TO HIGHER GROUND.

LAT...LON 2912 9832 2907 9828 2910 9810 2921 9797

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 7:03 PM CDT	Tornado Warning	EWX	Uvalde	57 min
Apr 7, 7:09 PM CDT	Tornado Warning	EWX	Medina	66 min
Apr 7, 7:36 PM CDT	Tornado Warning	EWX	Frio	54 min
Apr 7, 8:14 PM CDT	Tornado Warning	EWX	Medina	31 min
Apr 7, 8:29 PM CDT	Severe Thunderstorm Warning	EWX	Hays	46 min
Apr 7, 8:29 PM CDT	Tornado Warning	EWX	Frio	61 min
Apr 7, 8:36 PM CDT	Severe Thunderstorm Warning	EWX	Comal	24 min
Apr 7, 8:40 PM CDT	Tornado Warning	EWX	Atascosa	65 min
Apr 7, 9:18 PM CDT	Tornado Warning	EWX	Wilson	57 min
Apr 7, 9:31 PM CDT	Severe Thunderstorm Warning	EWX	Frio	59 min
Apr 7, 10:15 PM CDT	Severe Thunderstorm Warning	EWX	Wilson	60 min
Apr 7, 10:26 PM CDT	Flash Flood Warning	EWX	Frio	3 hr
Apr 7, 10:31 PM CDT	Severe Thunderstorm Warning	EWX	Frio	59 min
Apr 7, 10:37 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	53 min
Apr 7, 10:55 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	65 min
Apr 7, 11:07 PM CDT	Flash Flood Warning	EWX	Atascosa	6 hr
Apr 7, 11:29 PM CDT	Severe Thunderstorm Warning	EWX	Frio	46 min
Apr 7, 11:37 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa	38 min
Apr 7, 11:59 PM CDT	Severe Thunderstorm Warning	EWX	Bexar	46 min
Apr 8, 12:06 AM CDT	Severe Thunderstorm Warning	EWX	Wilson	54 min
Apr 8, 12:13 AM CDT	Tornado Warning	EWX	Atascosa	62 min
Apr 8, 12:23 AM CDT	Severe Thunderstorm Warning	EWX	Frio	37 min
Apr 8, 12:31 AM CDT	Severe Thunderstorm Warning	EWX	Medina, Uvalde, Zavala	59 min
Apr 8, 12:54 AM CDT	Tornado Warning	EWX	Frio	36 min
Apr 8, 12:55 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kendall	50 min
Apr 8, 1:00 AM CDT	Severe Thunderstorm Warning	EWX	Wilson	45 min
Apr 8, 1:20 AM CDT	Tornado Warning	EWX	Atascosa, Frio, Medina	55 min
Apr 8, 1:24 AM CDT	Flash Flood Warning	EWX	Medina	111 min
Apr 8, 1:30 AM CDT	Severe Thunderstorm Warning	EWX	Bexar	60 min
Apr 8, 1:50 AM CDT	Severe Thunderstorm Warning	EWX	Guadalupe	40 min
Apr 8, 2:05 AM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Gonzales	40 min
Apr 8, 2:08 AM CDT	Flash Flood Warning	EWX	Bexar, Guadalupe	3 hr
Apr 8, 2:13 AM CDT	Tornado Warning	EWX	Bexar, Wilson	47 min
Apr 8, 2:46 AM CDT	Severe Thunderstorm Warning	EWX	Caldwell	59 min
Apr 8, 2:54 AM CDT	Severe Thunderstorm Warning	EWX	Guadalupe	51 min
Apr 8, 3:07 AM CDT	Flash Flood Warning	EWX	Caldwell	2 hr
Apr 8, 3:11 AM CDT	Flash Flood Warning	EWX	Medina	2 hr
Apr 8, 3:18 AM CDT	Flash Flood Warning	EWX	Medina	117 min
Apr 8, 3:34 AM CDT	Severe Thunderstorm Warning	EWX	Medina	41 min
Apr 8, 4:13 AM CDT	Flash Flood Warning	EWX	Atascosa	4 hr
Apr 8, 4:59 AM CDT	Flash Flood Warning	EWX	Bexar, Guadalupe	2 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; radar from the NEXRAD Level II archive.