Alert archive / Texas / Flash Flood Warnings in 2015

Flash Flood Warning 39, NWS Austin/San Antonio, TX

May 18, 2015Fayette County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 18, 2015, 6:58 AM CDT for Fayette County, Lavaca County, Texas. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 18, 2015, 6:58 AM CDT (11:58 UTC)
Expired: May 18, 2015, 9:30 AM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Fayette County, TX, Lavaca County, TX

What was reported inside it

Time	Report	Where	Remark
May 18, 7:45 AM CDT	FLASH FLOOD	3 Ssw Dubina, TX	SECTIONS OF HWY 90 AND FM1579 EAST OF SCHULENBURG HAVE WATER OVER THE ROADWAYS...ALSO THERE ARE REPORTS OF ROAD DAMAGE AND CULVERTS BEING WASHED OUT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 12.0 hours before the alert went out and 219 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: 3080 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

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

629 
WGUS54 KEWX 181158
FFWEWX
TXC149-285-181430-
/O.NEW.KEWX.FF.W.0039.150518T1158Z-150518T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
658 AM CDT MON MAY 18 2015

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN FAYETTE COUNTY IN SOUTH CENTRAL TEXAS...
  NORTHWESTERN LAVACA COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 930 AM CDT
    
* AT 656 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN ACROSS THE MOULTON TO SCHULENBURG TO FAYETTEVILLE 
  AREAS. DOPPLER RADAR ESTIMATES SHOW UP TO THREE INCHES OF RAIN 
  HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SCHULENBURG...MOULTON...FAYETTEVILLE...HOLMAN...HENKHAUS...
  BRESLAU...HIGH HILL...MORAVIA...DUBINA...ELLINGER...ENGLE...
  AMMANNSVILLE...KOMENSKY AND WITTING.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 ARE POSSIBLE IN THE WARNED 
AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 2979 9672 2963 9687 2961 9684 2958 9683
      2958 9679 2953 9675 2943 9716 2958 9720
      2997 9657

$$

CP

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 17, 7:53 PM CDT	River Flood Warning	EWX	Karnes	18 hr
May 18, 4:17 AM CDT	Areal Flood Advisory	EWX	Fayette, Gonzales	3 hr
May 18, 4:48 AM CDT	Flash Flood Warning	EWX	Fayette, Gonzales	5 hr
May 18, 5:21 AM CDT	Areal Flood Advisory	EWX	Bastrop, Caldwell, Fayette, Lee	3 hr
May 18, 5:27 AM CDT	Special Weather Statement	EWX	Gonzales	33 min
May 18, 6:21 AM CDT	Areal Flood Advisory	EWX	Fayette, Lavaca	114 min
May 18, 8:42 AM CDT	River Flood Warning	EWX	DeWitt	54 hr
May 18, 8:42 AM CDT	River Flood Warning	EWX	DeWitt	4 days
May 18, 9:41 AM CDT	Areal Flood Advisory	EWX	Fayette, Gonzales	109 min
May 18, 6:32 PM CDT	Special Weather Statement	EWX	Llano	43 min
May 18, 6:32 PM CDT	Severe Thunderstorm Warning	EWX	Llano	58 min

Nearby

Flash Flood Warnings in Texas, 2015 Every flash flood warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.