Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 30, NWS Shreveport, LA

July 13, 2012Sabine County, San Augustine County, Texas; Sabine Parish, Louisiana

NWS Shreveport, LA issued this flash flood warning at Jul 13, 2012, 5:44 AM CDT for Sabine County, San Augustine County, Texas; Sabine Parish, Louisiana. It was in force for 4 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: Jul 13, 2012, 5:44 AM CDT (10:44 UTC)
Expired: Jul 13, 2012, 9:45 AM CDT
In force: 4 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: None

Counties Sabine Parish, LA, Sabine County, TX, San Augustine County, TX

What was reported inside it

Time	Report	Where	Remark
Jul 13, 7:38 AM CDT	FLASH FLOOD	Bronson, TX	SEVERAL INCHES OF WATER OVER AREAS OF HIGHWAY 96 IN SABINE COUNTY.

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

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 10.7 hours before the alert went out and 120 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: 823 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 14 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.

496 
WGUS54 KSHV 131044
FFWSHV
LAC085-TXC403-405-131445-
/O.NEW.KSHV.FF.W.0030.120713T1044Z-120713T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
544 AM CDT FRI JUL 13 2012

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN SABINE COUNTY IN EASTERN TEXAS...
  CENTRAL SAN AUGUSTINE COUNTY IN EASTERN TEXAS...
  CENTRAL SABINE PARISH IN NORTHWEST LOUISIANA...

* UNTIL 945 AM CDT

* AT 538 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
VERY HEAVY RAIN FROM A LINE OF THUNDERSTORMS STRETCHING FROM MACUNE 
TEXAS...TO NEAR FLOURINE AND MANY LOUISIANA...MOVING EAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO   
ROSEVINE...GENEVA...NEGREET...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3131 9423 3148 9423 3166 9334 3136 9334
      3136 9338 3132 9341

$$

24

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 13, 7:45 AM CDT	Flash Flood Warning	SHV	Angelina, Sabine, San Augustine	2 hr

Nearby

Flash Flood Warnings in Texas, 2012 Flash Flood Warnings in Louisiana, 2012 Every flash flood warning in 2012

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.