Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 24, NWS Austin/San Antonio, TX

May 24, 2021Fayette County, Lee County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 24, 2021, 4:12 PM CDT for Fayette County, Lee 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: May 24, 2021, 4:12 PM CDT (21:12 UTC)
Expired: May 24, 2021, 7:15 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Fayette County, TX, Lee County, TX

The radar

The Ft Hood radar (KGRK), 94 km from the middle of the area, began a volume at 21:14 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, 9.2 hours before the alert went out and 265 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: 1151 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 608 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

052 
WGUS54 KEWX 242112
FFWEWX
TXC149-287-250015-
/O.NEW.KEWX.FF.W.0024.210524T2112Z-210525T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
412 PM CDT Mon May 24 2021

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

* Flash Flood Warning for...
  Fayette County in south central Texas...
  Southeastern Lee County in south central Texas...

* Until 715 PM CDT.

* At 412 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. The expected rainfall rate is 2 to 4 inches in 1 
  hour. Additional rainfall amounts up to 1 inch 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...
  La Grange, Schulenburg, Fayetteville, Round Top, Muldoon, Lake 
  Somerville State Park & Trailway, Carmine, Rutersville, Rabbs 
  Prairie, Mullins Prairie, Nechanitz, Walhalla, Warrenton, Waldeck, 
  Plum, Holman, Warda, Ammannsville, Ellinger and Swiss Alp.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 2963 9700 2978 9708 3005 9695 3021 9684
      3032 9674 3032 9669 3030 9666 3030 9664
      3025 9669 3024 9673 3020 9674 3016 9679
      3014 9677 3016 9669 3015 9668 3015 9665
      3004 9662 2996 9657 2965 9685 2963 9692

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...2-4 INCHES IN 1 HOUR

$$

OB

1 follow-up statement

455 
WGUS74 KEWX 242311
FFSEWX

Flash Flood Statement
National Weather Service Austin/San Antonio TX
611 PM CDT Mon May 24 2021

TXC149-287-250015-
/O.CON.KEWX.FF.W.0024.000000T0000Z-210525T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fayette TX-Lee TX-
611 PM CDT Mon May 24 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM CDT THIS 
EVENING FOR FAYETTE AND SOUTHEASTERN LEE COUNTIES...

At 611 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain west of La Grange and across the northeast of Fayette County. 
Between 1 and 3 inches of rain have fallen. The expected rainfall 
rate is 2 to 4 inches in 1 hour over the northeast part of the 
county. Additional rainfall amounts up to 1 inch are possible across 
the northeast of the county. Flash flooding is ongoing or expected 
to begin shortly over some areas.

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...
  La Grange, Schulenburg, Fayetteville, Round Top, Muldoon, Lake 
  Somerville State Park & Trailway, Carmine, Rutersville, Rabbs 
  Prairie, Mullins Prairie, Nechanitz, Walhalla, Warrenton, Waldeck, 
  Plum, Holman, Warda, Ammannsville, Ellinger and Swiss Alp.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 2963 9700 2978 9708 3005 9695 3021 9684
      3032 9674 3032 9669 3030 9666 3030 9664
      3025 9669 3024 9673 3020 9674 3016 9679
      3014 9677 3016 9669 3015 9668 3015 9665
      3004 9662 2996 9657 2965 9685 2963 9692

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...2-4 INCHES IN 1 HOUR

$$

OB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 3:57 AM CDT	Areal Flood Advisory	EWX	Bexar, Kendall	3 hr
May 24, 4:23 AM CDT	Areal Flood Advisory	EWX	Hays, Travis	3 hr
May 24, 8:18 AM CDT	Areal Flood Advisory	EWX	Bastrop	3 hr
May 24, 8:21 AM CDT	Areal Flood Advisory	EWX	Travis, Williamson	3 hr
May 24, 1:07 PM CDT	Areal Flood Advisory	EWX	Lee	3 hr
May 24, 1:21 PM CDT	Areal Flood Advisory	EWX	Bexar	114 min
May 24, 1:45 PM CDT	Areal Flood Advisory	EWX	Burnet, Williamson	2 hr
May 24, 3:29 PM CDT	Areal Flood Advisory	EWX	Bexar, Comal	3 hr
May 24, 3:44 PM CDT	Areal Flood Advisory	EWX	Fayette, Lee	3 hr
May 24, 4:30 PM CDT	Areal Flood Advisory	EWX	Williamson	112 min
May 24, 4:31 PM CDT	Areal Flood Advisory	EWX	Bastrop	111 min
May 24, 4:55 PM CDT	Special Weather Statement	EWX	Lee	35 min

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.