Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 16, NWS Austin/San Antonio, TX

May 5, 2001Bandera County, Real County, Uvalde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 5, 2001, 2:20 AM CDT for Bandera County, Real County, Uvalde County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 5, 2001, 2:20 AM CDT (07:20 UTC)
Expired: May 5, 2001, 5:00 AM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Bandera County, TX, Real County, TX, Uvalde County, TX

The radar

The Laughlin AFB radar (KDFX), 73 km from the middle of the area, began a volume at 07:23 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

Del Rio, TX (KDRT), launched 00:00Z, 7.3 hours before the alert went out and 119 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: 73 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 906 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 050719
FFWSAT
TXC019-385-463-051000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
220 AM CDT SAT MAY 5 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  REAL
  BANDERA
  UVALDE

* UNTIL 500 AM CDT

* AT 220 AM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  OVER PARTS OF REAL...UVALDE AND BANDERA COUNTIES...MOVING EAST AT
  5 TO 10 MPH.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL 
CREEKS AND STREAMS...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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS 
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT 
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS 
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL 
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS >WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID
CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

LAT...LON 2914 10006 2916 9953 2966 9953 2970 9912
          2987 9915 2987 9973 3007 9972 3002 9991

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 7:12 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	63 min
May 4, 7:35 PM CDT	Tornado Warning	EWX	Maverick	40 min
May 4, 7:54 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Real	66 min
May 4, 8:06 PM CDT	Flash Flood Warning	EWX	Bandera, Uvalde	114 min
May 4, 8:15 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Zavala	60 min
May 4, 10:14 PM CDT	Tornado Warning	EWX	Frio	46 min
May 5, 3:22 PM CDT	Flash Flood Warning	EWX	Karnes	113 min
May 5, 3:45 PM CDT	Flash Flood Warning	EWX	Lavaca	2 hr
May 5, 4:01 PM CDT	Flash Flood Warning	EWX	DeWitt	119 min
May 5, 5:02 PM CDT	Flash Flood Warning	EWX	Travis, Williamson	88 min
May 5, 5:41 PM CDT	Flash Flood Warning	EWX	Lavaca	2 hr

Nearby

Flash Flood Warnings in Texas, 2001 Every flash flood warning in 2001

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.