Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 32, NWS Austin/San Antonio, TX

June 1, 2021DeWitt County, Gonzales County, Karnes County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 1, 2021, 5:07 AM CDT for DeWitt County, Gonzales County, Karnes 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 as issued.

The facts

Issued: Jun 1, 2021, 5:07 AM CDT (10:07 UTC)
Expired: Jun 1, 2021, 8:00 AM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties DeWitt County, TX, Gonzales County, TX, Karnes County, TX

The radar

The Austin/San Antonio radar (KEWX), 81 km from the middle of the area, began a volume at 10:08 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, 10.1 hours before the alert went out and 150 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: 721 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

540 
WGUS54 KEWX 011007
FFWEWX
TXC123-177-255-011300-
/O.NEW.KEWX.FF.W.0032.210601T1007Z-210601T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
507 AM CDT Tue Jun 1 2021

The National Weather Service in Austin/San Antonio has issued a

* Flash Flood Warning for...
  West Central DeWitt County in south central Texas...
  South Central Gonzales County in south central Texas...
  Northeastern Karnes County in south central Texas...

* Until 800 AM CDT.

* At 507 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Gillett, Cestohowa, Ecleto, New Davy, Gruenau, Helena, Sample and 
  Paweleville.

This includes the following streams and drainages...
  Cooper Creek, Rocky Creek, Salt Creek, Dry Creek, Shoats Creek, 
  Blackjack Creek, San Antonio River, Mustang Creek, McTennel Creek, 
  Clear Creek, Deer Creek, Dry Ecleto Creek, Cabeza Creek, Brushy 
  Creek, Jack Pump Creek, Board Branch, Cibolo Creek, Jack Hand 
  Branch, Ecleto Creek, Rhymes Creek, Mulifest Creek, Mound Creek, 
  Panna Maria Creek, Elm Creek, Sandies Creek, Fifteenmile Coleto 
  Creek, Birds Creek, Coleto Creek, White Oak Branch, Little Salt 
  Creek, Thomas Creek and Panther Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 2887 9781 2904 9796 2927 9758 2912 9741

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

RUNYEN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 8:31 PM CDT	Special Weather Statement	EWX	Val Verde	44 min
May 31, 8:35 PM CDT	Special Weather Statement	EWX	Val Verde	40 min
May 31, 9:14 PM CDT	Special Weather Statement	EWX	Val Verde	46 min
May 31, 9:23 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	43 min
May 31, 9:48 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Val Verde	2 hr
May 31, 10:22 PM CDT	Areal Flood Advisory	EWX	Williamson	3 hr
May 31, 10:38 PM CDT	Special Weather Statement	EWX	Kinney	52 min
May 31, 11:00 PM CDT	Areal Flood Advisory	EWX	Kinney, Maverick	26 min
May 31, 11:15 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick	60 min
May 31, 11:26 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Kinney, Maverick	3 hr
May 31, 11:32 PM CDT	Special Weather Statement	EWX	Gillespie	43 min
May 31, 11:47 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Maverick	3 hr
May 31, 11:51 PM CDT	Special Weather Statement	EWX	Maverick	24 min
Jun 1, 12:08 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Maverick, Zavala	67 min
Jun 1, 12:14 AM CDT	Areal Flood Advisory	EWX	Gillespie	3 hr
Jun 1, 12:44 AM CDT	Flash Flood Warning Considerable damage threat	EWX	Dimmit, Maverick, Zavala	3 hr
Jun 1, 12:54 AM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Llano	3 hr
Jun 1, 12:55 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Frio, Maverick, Zavala	65 min
Jun 1, 1:19 AM CDT	Areal Flood Advisory	EWX	Travis, Williamson	3 hr
Jun 1, 1:36 AM CDT	Areal Flood Advisory	EWX	Bexar, Medina	3 hr
Jun 1, 1:57 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Frio, Zavala	63 min
Jun 1, 2:08 AM CDT	Areal Flood Advisory	EWX	Dimmit, Zavala	4 hr
Jun 1, 2:34 AM CDT	Areal Flood Advisory	EWX	Bastrop, Caldwell, Lee	3 hr
Jun 1, 2:56 AM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar, Frio, Medina	3 hr
Jun 1, 2:56 AM CDT	Special Weather Statement	EWX	Frio	49 min
Jun 1, 3:13 AM CDT	Areal Flood Advisory	EWX	Gonzales	3 hr
Jun 1, 3:34 AM CDT	Areal Flood Advisory	EWX	Atascosa	2 hr
Jun 1, 3:40 AM CDT	Areal Flood Advisory	EWX	Dimmit, Maverick, Zavala	2 hr
Jun 1, 3:57 AM CDT	Areal Flood Advisory	EWX	Karnes, Wilson	2 hr
Jun 1, 4:34 AM CDT	Areal Flood Advisory	EWX	DeWitt, Karnes	3 hr
Jun 1, 6:02 AM CDT	Special Weather Statement	EWX	Bexar, Comal, Guadalupe	58 min
Jun 1, 7:39 AM CDT	River Flood Warning	EWX	Williamson	6 hr

Nearby

Flash Flood Warnings in Texas, 2021 Every flash flood warning in 2021

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.