Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 31, NWS Austin/San Antonio, TX

June 1, 2021Dimmit County, Maverick County, Zavala County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 1, 2021, 12:44 AM CDT for Dimmit County, Maverick County, Zavala 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, 12:44 AM CDT (05:44 UTC)
Expired
Jun 1, 2021, 3:45 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

Counties Dimmit County, TX, Maverick County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 88 km from the middle of the area, began a volume at 05:43 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, 5.7 hours before the alert went out and 117 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, Del Rio, TX at 00:00Z on 2021-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2624 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, Del Rio, TX at 00:00Z on 2021-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.19395878Sfc1 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
2624 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
922 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
176 m²/s²
Significant tornado parameter
2.8
Supercell composite
11.0

Open this sounding in Storm Lab

The text

As transmitted.

287 
WGUS54 KEWX 010544
FFWEWX
TXC127-323-507-010845-
/O.NEW.KEWX.FF.W.0031.210601T0544Z-210601T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
1244 AM CDT Tue Jun 1 2021

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

* Flash Flood Warning for...
  Western Dimmit County in south central Texas...
  Eastern Maverick County in south central Texas...
  Western Zavala County in south central Texas...

* Until 345 AM CDT.

* At 1244 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 5 inches are 
  possible in the warned area. 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...
  Crystal City, Carrizo Springs, El Indio, Asherton, Cometa, Winter 
  Haven, Carrizo Hill, Chula Vista-River Spur, Las Colonias, Gilson 
  Groves and Farias Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 2857 10022 2909 10023 2909 9997 2828 9964
      2820 9963 2820 10021 2823 10022 2828 10029
      2831 10029 2839 10034 2844 10034 2848 10037
      2850 10033 2851 10039 2855 10041

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

$$

HAMPSHIRE

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 8:31 PM CDTSpecial Weather StatementEWXVal Verde44 min
May 31, 8:35 PM CDTSpecial Weather StatementEWXVal Verde40 min
May 31, 9:14 PM CDTSpecial Weather StatementEWXVal Verde46 min
May 31, 9:23 PM CDTSevere Thunderstorm WarningEWXVal Verde43 min
May 31, 9:48 PM CDTFlash Flood Warning Considerable damage threatEWXVal Verde2 hr
May 31, 10:22 PM CDTAreal Flood AdvisoryEWXWilliamson3 hr
May 31, 10:38 PM CDTSpecial Weather StatementEWXKinney52 min
May 31, 11:00 PM CDTAreal Flood AdvisoryEWXKinney, Maverick26 min
May 31, 11:15 PM CDTSevere Thunderstorm WarningEWXKinney, Maverick60 min
May 31, 11:26 PM CDTFlash Flood Warning Considerable damage threatEWXKinney, Maverick3 hr
May 31, 11:32 PM CDTSpecial Weather StatementEWXGillespie43 min
May 31, 11:47 PM CDTFlash Flood Warning Considerable damage threatEWXMaverick3 hr
May 31, 11:51 PM CDTSpecial Weather StatementEWXMaverick24 min
Jun 1, 12:08 AM CDTSevere Thunderstorm WarningEWXDimmit, Maverick, Zavala67 min
Jun 1, 12:14 AM CDTAreal Flood AdvisoryEWXGillespie3 hr
Jun 1, 12:54 AM CDTAreal Flood AdvisoryEWXBlanco, Burnet, Llano3 hr
Jun 1, 12:55 AM CDTSevere Thunderstorm WarningEWXDimmit, Frio, Maverick, Zavala65 min
Jun 1, 1:19 AM CDTAreal Flood AdvisoryEWXTravis, Williamson3 hr
Jun 1, 1:36 AM CDTAreal Flood AdvisoryEWXBexar, Medina3 hr
Jun 1, 1:57 AM CDTSevere Thunderstorm WarningEWXDimmit, Frio, Zavala63 min
Jun 1, 2:08 AM CDTAreal Flood AdvisoryEWXDimmit, Zavala4 hr
Jun 1, 2:34 AM CDTAreal Flood AdvisoryEWXBastrop, Caldwell, Lee3 hr
Jun 1, 2:56 AM CDTAreal Flood AdvisoryEWXAtascosa, Bexar, Frio, Medina3 hr
Jun 1, 2:56 AM CDTSpecial Weather StatementEWXFrio49 min
Jun 1, 3:13 AM CDTAreal Flood AdvisoryEWXGonzales3 hr
Jun 1, 3:34 AM CDTAreal Flood AdvisoryEWXAtascosa2 hr
Jun 1, 3:40 AM CDTAreal Flood AdvisoryEWXDimmit, Maverick, Zavala2 hr
Jun 1, 3:57 AM CDTAreal Flood AdvisoryEWXKarnes, Wilson2 hr
Jun 1, 4:34 AM CDTAreal Flood AdvisoryEWXDeWitt, Karnes3 hr
Jun 1, 5:07 AM CDTFlash Flood Warning Considerable damage threatEWXDeWitt, Gonzales, Karnes3 hr
Jun 1, 6:02 AM CDTSpecial Weather StatementEWXBexar, Comal, Guadalupe58 min
Jun 1, 7:39 AM CDTRiver Flood WarningEWXWilliamson6 hr

Nearby

Flash Flood Warnings in Texas, 2021Every 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.