Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 63, NWS Midland/Odessa, TX

August 20, 2021Pecos County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at Aug 20, 2021, 4:47 PM CDT for Pecos 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: Aug 20, 2021, 4:47 PM CDT (21:47 UTC)
Expired: Aug 20, 2021, 8:00 PM CDT
In force: 3 hr
Issued by: NWS Midland/Odessa, TX
Area: Storm-based polygon
Flood severity: None

County Pecos County, TX

The radar

The Midland/Odessa radar (KMAF), 133 km from the middle of the area, began a volume at 21:51 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, 9.8 hours before the alert went out and 133 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: 385 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

158 
WGUS54 KMAF 202147
FFWMAF
TXC371-210100-
/O.NEW.KMAF.FF.W.0063.210820T2147Z-210821T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Midland/Odessa TX
447 PM CDT Fri Aug 20 2021

The National Weather Service in Midland/Odessa has issued a

* Flash Flood Warning for...
  Northwestern Pecos County in southwestern Texas...

* Until 800 PM CDT.

* At 447 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Fort Stockton and Fort Stockton-Pecos County Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3093 10294 3093 10286 3089 10286 3088 10293

FLASH FLOOD...RADAR INDICATED

$$

Michelle Schuldt

1 follow-up statement

836 
WGUS74 KMAF 202338
FFSMAF

Flash Flood Statement
National Weather Service Midland/Odessa TX
638 PM CDT Fri Aug 20 2021

TXC371-210100-
/O.CON.KMAF.FF.W.0063.000000T0000Z-210821T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pecos TX-
638 PM CDT Fri Aug 20 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING 
FOR NORTHWESTERN PECOS COUNTY...

At 638 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Flash flooding is ongoing or expected 
to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Fort Stockton and Fort Stockton-Pecos County Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3093 10294 3093 10286 3089 10286 3088 10293

FLASH FLOOD...RADAR INDICATED

$$

Michelle Schuldt

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 19, 7:05 PM CDT	Areal Flood Advisory	MAF	Pecos	3 hr
Aug 19, 7:21 PM CDT	Special Weather Statement	MAF	Brewster	24 min
Aug 19, 7:24 PM CDT	Severe Thunderstorm Warning	MAF	Glasscock, Midland, Reagan	66 min
Aug 19, 8:26 PM CDT	Areal Flood Advisory	MAF	Brewster	5 hr
Aug 20, 1:07 PM CDT	Areal Flood Advisory	MAF	Jeff Davis	113 min
Aug 20, 1:21 PM CDT	Special Weather Statement	MAF	Jeff Davis	39 min
Aug 20, 2:28 PM CDT	Areal Flood Advisory	MAF	Jeff Davis	2 hr
Aug 20, 2:30 PM CDT	Special Weather Statement	MAF	Jeff Davis	45 min
Aug 20, 3:18 PM CDT	Areal Flood Advisory	MAF	Jeff Davis	3 hr
Aug 20, 4:25 PM CDT	Areal Flood Advisory	MAF	Pecos	3 hr
Aug 20, 4:28 PM CDT	Flash Flood Warning	MAF	Presidio	3 hr
Aug 20, 6:00 PM CDT	Special Weather Statement	MAF	Crockett	45 min
Aug 20, 6:23 PM CDT	Special Weather Statement	MAF	Scurry	52 min
Aug 20, 6:24 PM CDT	Special Weather Statement	MAF	Andrews	36 min
Aug 20, 6:33 PM CDT	Areal Flood Advisory	MAF	Borden, Scurry	3 hr
Aug 20, 6:44 PM CDT	Areal Flood Advisory	MAF	Crane, Pecos	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.