Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 55, NWS San Angelo, TX

October 13, 2021Crockett County, Texas

NWS San Angelo, TX issued this flash flood warning at Oct 13, 2021, 2:32 PM CDT for Crockett 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: Oct 13, 2021, 2:32 PM CDT (19:32 UTC)
Expired: Oct 13, 2021, 5:30 PM CDT
In force: 3 hr
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Crockett County, TX

The radar

The San Angelo radar (KSJT), 134 km from the middle of the area, began a volume at 19:34 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 12:00Z, 7.5 hours before the alert went out and 145 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: 2273 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 12.3

Open this sounding in Storm Lab

The text

As transmitted.

132 
WGUS54 KSJT 131932
FFWSJT
TXC105-132230-
/O.NEW.KSJT.FF.W.0055.211013T1932Z-211013T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Angelo TX
232 PM CDT Wed Oct 13 2021

The National Weather Service in San Angelo has issued a

* Flash Flood Warning for...
  Crockett County in west central Texas...

* Until 530 PM CDT.

* At 231 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 2 to 3 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...
  Ozona, The Intersection Of I-10 And Highway 405, The Intersection 
  Of Highway 163 And Ranch Road 1973, The Intersection Of I-10 And 
  Highway 290, The Intersection Of Ranch Road 2083 And Highway 405, 
  The Intersection Of Us 190 And Highway 163, I-10 Near The 
  Crockett-Sutton County Line and Us-190 Near The Crockett-Sutton 
  County Line.

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.

Remain alert for flooding even in locations not receiving rain. 
Arroyos, streams, and rivers can become raging killer currents in a 
matter of minutes, even from distant rainfall.

&&

LAT...LON 3029 10096 3029 10173 3034 10172 3035 10166
      3040 10171 3052 10168 3055 10165 3059 10166
      3062 10165 3064 10167 3108 10160 3108 10096

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

$$

21

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 11:16 AM CDT	Special Weather Statement	SJT	Crockett	44 min
Oct 13, 11:44 AM CDT	Areal Flood Advisory	SJT	Crockett	3 hr
Oct 13, 1:26 PM CDT	Areal Flood Advisory	SJT	Coke, Irion, Sterling, Tom Green	3 hr
Oct 13, 1:39 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Tom Green	3 hr
Oct 13, 2:07 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Coke, Runnels, Taylor	113 min
Oct 13, 2:20 PM CDT	Special Weather Statement	SJT	Callahan	40 min
Oct 13, 3:18 PM CDT	Areal Flood Advisory	SJT	Callahan, Coleman	3 hr
Oct 13, 3:26 PM CDT	Areal Flood Advisory	SJT	Schleicher, Sutton	3 hr
Oct 13, 4:08 PM CDT	Areal Flood Advisory	SJT	Concho, Runnels, Tom Green	3 hr
Oct 13, 4:32 PM CDT	Areal Flood Advisory	SJT	Kimble, Menard, Schleicher, Sutton	3 hr
Oct 13, 4:44 PM CDT	Areal Flood Advisory	SJT	Coleman, McCulloch	3 hr
Oct 13, 5:22 PM CDT	Areal Flood Advisory	SJT	Brown	3 hr
Oct 13, 5:55 PM CDT	Special Weather Statement	SJT	Mason	65 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.