Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 4, NWS San Angelo, TX

May 19, 2021Concho County, Tom Green County, Texas

NWS San Angelo, TX issued this flash flood warning at May 19, 2021, 2:52 PM CDT for Concho County, Tom Green County, Texas. It was in force for 96 min. 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 19, 2021, 2:52 PM CDT (19:52 UTC)
Expired: May 19, 2021, 4:28 PM CDT
In force: 96 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Concho County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 30 km from the middle of the area, began a volume at 19:51 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

Midland Regional, TX (KMAF), launched 12:00Z, 7.9 hours before the alert went out and 204 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: 1241 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

As transmitted.

492 
WGUS54 KSJT 191952
FFWSJT
TXC095-451-192300-
/O.NEW.KSJT.FF.W.0004.210519T1952Z-210519T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Angelo TX
252 PM CDT Wed May 19 2021

The National Weather Service in San Angelo has issued a

* Flash Flood Warning for...
  West Central Concho County in west central Texas...
  Southeastern Tom Green County in west central Texas...

* Until 600 PM CDT.

* At 251 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 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...
  Vancourt, Eola, Mereta and Vick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3115 10015 3111 10026 3109 10053 3126 10038
      3137 10021 3146 10016 3142 9998 3131 10005

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

$$

21

1 follow-up statement

751 
WGUS74 KSJT 192128
FFSSJT

Flash Flood Statement
National Weather Service San Angelo TX
428 PM CDT Wed May 19 2021

TXC095-451-192138-
/O.CAN.KSJT.FF.W.0004.000000T0000Z-210519T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Concho TX-Tom Green TX-
428 PM CDT Wed May 19 2021

...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL CONCHO AND 
SOUTHEASTERN TOM GREEN COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed any remaining road closures.

LAT...LON 3115 10015 3111 10026 3109 10053 3126 10038
      3137 10021 3146 10016 3145 10011 3142 9998
      3131 10005

$$

CRD

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 12:03 PM CDT	Special Weather Statement	SJT	Schleicher	42 min
May 19, 12:34 PM CDT	Special Weather Statement	SJT	Kimble	41 min
May 19, 1:51 PM CDT	Special Weather Statement	SJT	Concho	39 min
May 19, 2:27 PM CDT	Areal Flood Advisory	SJT	Concho, Runnels, Tom Green	2 hr
May 19, 2:35 PM CDT	Special Weather Statement	SJT	Concho	55 min
May 19, 3:20 PM CDT	Areal Flood Advisory	SJT	Coleman, Concho, McCulloch, Runnels	3 hr
May 19, 3:22 PM CDT	Special Weather Statement	SJT	Menard	38 min
May 19, 3:31 PM CDT	Areal Flood Advisory	SJT	Schleicher, Tom Green	119 min
May 19, 3:35 PM CDT	Special Weather Statement	SJT	Concho	55 min
May 19, 4:06 PM CDT	Special Weather Statement	SJT	Concho	54 min
May 19, 4:43 PM CDT	Areal Flood Advisory	SJT	Coleman, Concho, McCulloch, Menard	2 hr
May 19, 5:31 PM CDT	Special Weather Statement	SJT	Crockett	59 min
May 19, 5:35 PM CDT	Special Weather Statement	SJT	Irion	40 min
May 19, 6:04 PM CDT	Areal Flood Advisory	SJT	Irion	116 min
May 19, 6:18 PM CDT	Special Weather Statement	SJT	Irion	42 min
May 19, 6:26 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Irion	3 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.