Alert archive / Texas / Flash Flood Warnings in 2017

Flash Flood Warning 22, NWS Midland/Odessa, TX

July 23, 2017Brewster County, Pecos County, Terrell County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at Jul 23, 2017, 1:49 PM CDT for Brewster County, Pecos County, Terrell 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
Jul 23, 2017, 1:49 PM CDT (18:49 UTC)
Expired
Jul 23, 2017, 4:45 PM CDT
In force
3 hr
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon
Flood severity
None

Counties Brewster County, TX, Pecos County, TX, Terrell County, TX

The radar

The Midland/Odessa radar (KMAF), 194 km from the middle of the area, began a volume at 18:50 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, 6.8 hours before the alert went out and 194 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, Midland Regional, TX at 12:00Z on 2017-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 12:00Z on 2017-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -33 square meters per square second.1939Sfc1 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
24 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1866 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-33 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

078 
WGUS54 KMAF 231849
FFWMAF
TXC043-371-443-232145-
/O.NEW.KMAF.FF.W.0022.170723T1849Z-170723T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Midland/Odessa TX
149 PM CDT SUN JUL 23 2017

The National Weather Service in Midland has issued a

* Flash Flood Warning for...
  Southwestern Pecos County in southwestern Texas...
  Northeastern Brewster County in southwestern Texas...
  West central Terrell County in southwestern Texas...

* Until 445 PM CDT

* At 149 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Marathon and Longfellow. 

This includes the following low water crossing location Ave D
Crossing Alsate Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 3050 10246 2995 10245 2993 10335 3053 10327

$$

29

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 7:10 PM CDTFlash Flood WarningMAFCrane3 hr
Jul 22, 7:48 PM CDTFlash Flood WarningMAFUpton3 hr
Jul 22, 9:49 PM CDTSpecial Weather StatementMAFJeff Davis56 min
Jul 23, 7:41 AM CDTAreal Flood AdvisoryMAFCrane, Pecos, Upton3 hr
Jul 23, 9:23 AM CDTAreal Flood AdvisoryMAFEctor3 hr
Jul 23, 1:28 PM CDTAreal Flood AdvisoryMAFBrewster, Pecos, Terrell3 hr
Jul 23, 3:56 PM CDTAreal Flood AdvisoryMAFPecos, Terrell2 hr
Jul 23, 4:18 PM CDTSpecial Weather StatementMAFPecos42 min
Jul 23, 4:42 PM CDTSpecial Weather StatementMAFJeff Davis48 min
Jul 23, 4:52 PM CDTAreal Flood AdvisoryMAFJeff Davis3 hr
Jul 23, 5:48 PM CDTAreal Flood AdvisoryMAFCrane, Pecos, Upton3 hr

Nearby

Flash Flood Warnings in Texas, 2017Every flash flood warning in 2017

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.