Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 17, NWS Austin/San Antonio, TX

May 5, 2001Karnes County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 5, 2001, 3:22 PM CDT for Karnes County, Texas. It was in force for 113 min. 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, 3:22 PM CDT (20:22 UTC)
Expired: May 5, 2001, 5:15 PM CDT
In force: 113 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Karnes County, TX

The radar

The Austin/San Antonio radar (KEWX), 97 km from the middle of the area, began a volume at 20:24 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 12:00Z, 8.4 hours before the alert went out and 135 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: 1535 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 576 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 052024
FFWEWX
TXC255-052215-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KARNES

* UNTIL 515 PM CDT

* AT 320 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  ACROSS MUCH OF KARNES COUNTY.  CREEKS AND LOW WATER CROSSINGS WILL
  BE FLOODED BY THIS HEAVY RAINS.

MOTORISTS SHOULD AVOID LOW WATER CROSSINGS.  CHILDREN SHOULD BE KEPT
FROM PLAYING NEAR DRAINAGE AREAS AND OTHER PLACES WHICH MIGHT BECOME
FLOODED OR SWIFT WATER IS FLOWING.

LAT...LON 2887 9814 2874 9802 2871 9781 2882 9761
          2899 9780S 2910 9763 2920 9775

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, 2:20 AM CDT	Flash Flood Warning	EWX	Bandera, Real, Uvalde	3 hr
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.