Alert archive / Texas / Flash Flood Warnings in 2014

Flash Flood Warning 21, NWS San Angelo, TX

August 17, 2014Kimble County, Texas

NWS San Angelo, TX issued this flash flood warning at Aug 17, 2014, 7:30 AM CDT for Kimble 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 17, 2014, 7:30 AM CDT (12:30 UTC)
Expired: Aug 17, 2014, 10:30 AM CDT
In force: 3 hr
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Flood severity: None

County Kimble County, TX

The radar

The San Angelo radar (KSJT), 130 km from the middle of the area, began a volume at 12:32 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 12:00Z, 0.5 hours before the alert went out and 180 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: 1782 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 1094 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

875 
WGUS54 KSJT 171230
FFWSJT
TXC267-171530-
/O.NEW.KSJT.FF.W.0021.140817T1230Z-140817T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
730 AM CDT SUN AUG 17 2014

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN KIMBLE COUNTY IN WEST CENTRAL TEXAS...

* UNTIL 1030 AM CDT

* AT 727 AM CDT...THUNDERSTORMS WITH VERY HEAVY RAINFALL CONTINUE    
  FROM 5 MILES EAST OF SEGOVIA NORTH TO LONDON. RADAR ESTIMATES      
  INDICATE 3 TO 4 INCHES OF RAINFALL HAVE FALLEN IN THE AREA...AND   
  1 TO 2 INCHES OF ADDITIONAL RAINFALL IS LIKELY.

* IMPACTS FROM THIS INTENSE RAINFALL WILL INCLUDE:
  FLOODING OF LOW LYING ROADS AND INTERSECTIONS.
  RAPID RISE OF AREA CREEKS...STREAMS...AND ARROYOS.

  WATER WILL BE HIGH AND FAST ENOUGH TO STALL VEHICLES OR WASH THEM
  COMPLETELY OFF THE ROAD.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...YATES AND
LONDON.

THIS INCLUDES THE LOW WATER CROSSINGS AT...
  COUNTY ROAD 370 CROSSING BIG SALINE CREEK...
  COUNTY ROAD 351 CROSSING BIG SALINE CREEK...
  KC 314 CROSSING LLANO RIVER...
  CROSSINGS ALONG COUNTY ROAD 410...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 3070 9949 3050 9949 3049 9942 3031 9956
      3036 9965 3071 9969

$$
04

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 8:29 PM CDT	Special Weather Statement	SJT	Haskell	46 min
Aug 16, 10:00 PM CDT	Special Weather Statement	SJT	Haskell	45 min
Aug 16, 10:11 PM CDT	Special Weather Statement	SJT	Fisher	34 min
Aug 16, 10:48 PM CDT	Special Weather Statement	SJT	Fisher	42 min
Aug 17, 12:38 AM CDT	Areal Flood Advisory	SJT	Irion, Tom Green	82 min
Aug 17, 2:51 AM CDT	Areal Flood Advisory	SJT	Sterling	84 min
Aug 17, 3:42 AM CDT	Areal Flood Advisory	SJT	Sutton	93 min
Aug 17, 4:10 AM CDT	Areal Flood Advisory	SJT	Sterling	80 min
Aug 17, 4:45 AM CDT	Areal Flood Advisory	SJT	Kimble, Menard, Sutton	2 hr
Aug 17, 6:21 AM CDT	Areal Flood Advisory	SJT	McCulloch	84 min
Aug 17, 6:54 AM CDT	Areal Flood Advisory	SJT	Kimble, Mason, Menard	111 min
Aug 17, 8:32 AM CDT	Areal Flood Advisory	SJT	Schleicher, Sutton	118 min
Aug 17, 3:03 PM CDT	Special Weather Statement	SJT	Tom Green	42 min
Aug 17, 3:44 PM CDT	Special Weather Statement	SJT	Tom Green	31 min
Aug 17, 4:13 PM CDT	Special Weather Statement	SJT	Tom Green	32 min
Aug 17, 4:32 PM CDT	Special Weather Statement	SJT	Upton	28 min
Aug 17, 6:35 PM CDT	Areal Flood Advisory	SJT	San Saba	115 min

Nearby

Flash Flood Warnings in Texas, 2014 Every flash flood warning in 2014

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.