Alert archive / Texas / Flash Flood Warnings in 2017

Flash Flood Warning 1, NWS Midland/Odessa, TX

April 10, 2017Terrell County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at Apr 10, 2017, 9:48 PM CDT for 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
Apr 10, 2017, 9:48 PM CDT (02:48 UTC)
Expired
Apr 11, 2017, 12:45 AM CDT
In force
3 hr
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon
Flood severity
None

County Terrell County, TX

The radar

The San Angelo radar (KSJT), 163 km from the middle of the area, began a volume at 02:49 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 (KDLF), launched 00:00Z, 2.8 hours before the alert went out and 147 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, Del Rio, TX at 00:00Z on 2017-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2462 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2017-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -51 square meters per square second.193958Sfc1 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
2462 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1270 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-51 m²/s²
0-3 km storm-relative helicity
-68 m²/s²
Significant tornado parameter
-0.4
Supercell composite
-3.9

Open this sounding in Storm Lab

The text

As transmitted.

734 
WGUS54 KMAF 110248
FFWMAF
TXC443-110545-
/O.NEW.KMAF.FF.W.0001.170411T0248Z-170411T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Midland/Odessa TX
948 PM CDT MON APR 10 2017

The National Weather Service in Midland has issued a

* Flash Flood Warning for...
  Northeastern Terrell County in southwestern Texas...

* Until 1245 AM CDT

* At 947 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Terrell County Gas Plant.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3034 10172 3029 10176 3028 10230 3048 10230
      3055 10166 3049 10169 3047 10169 3046 10170
      3047 10173 3044 10172 3042 10174 3040 10170
      3038 10170 3036 10166 3034 10166

$$

44

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 10, 7:35 PM CDTSpecial Weather StatementMAFCrockett40 min
Apr 10, 8:06 PM CDTSpecial Weather StatementMAFTerrell39 min
Apr 10, 8:15 PM CDTSevere Thunderstorm WarningMAFTerrell45 min
Apr 10, 8:58 PM CDTSevere Thunderstorm WarningMAFTerrell62 min
Apr 10, 9:59 PM CDTSevere Thunderstorm WarningMAFTerrell38 min

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.