Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 2, NWS San Angelo, TX

May 7, 2012Irion County, Tom Green County, Texas

NWS San Angelo, TX issued this flash flood warning at May 7, 2012, 2:40 PM CDT for Irion County, Tom Green County, Texas. It was in force for 3 hr. 4 reports 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 7, 2012, 2:40 PM CDT (19:40 UTC)
Expired: May 7, 2012, 5:30 PM CDT
In force: 3 hr
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Flood severity: None

Counties Irion County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 16 km from the middle of the area, began a volume at 19:40 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.

What was reported inside it

Time	Report	Where	Remark
May 7, 2:40 PM CDT	FLASH FLOOD	1 Sse Tankersley, TX	FLOODING ALONG FM-2335 JUST SOUTH OF HIGHWAY 67
May 7, 2:40 PM CDT	FLASH FLOOD	3 W Tankersley, TX	HIGHWAY 67 FLOODED NEAR THE TOM GREEN IRION COUNTY LINE.
May 7, 2:40 PM CDT	FLASH FLOOD	San Angelo, TX	WATER RESCUE REPORTED AT SOUTHWEST BLVD NEAR LOOP 306 IN SAN ANGELO
May 7, 3:34 PM CDT	FLASH FLOOD	San Angelo, TX

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

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 7.7 hours before the alert went out and 159 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: 1136 J/kg
Mixed-layer CIN: -273 J/kg
Mixed-layer LCL: 1187 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

375 
WGUS54 KSJT 071940
FFWSJT
TXC235-451-072230-
/O.NEW.KSJT.FF.W.0002.120507T1940Z-120507T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
240 PM CDT MON MAY 7 2012

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL TOM GREEN COUNTY IN WEST CENTRAL TEXAS...
  IRION COUNTY IN WEST CENTRAL TEXAS...

* UNTIL 530 PM CDT

* AT 233 PM CDT...TRAINED WEATHER SPOTTERS REPORTED FLOODING OF 
HIGHWAY 67 NEAR TANKERSLEY...AND ALONG NUMEROUS STREETS IN SAN 
ANGELO.  HEAVY RAINFALL FROM THUNDERSTORMS CONTINUE TO PRODUCE MORE 
RAIN AND ADDITIONAL FLOODING IS EXPECTED.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS NEAR FLOOD PRONE AREAS ALONG THE RED ARROYO AT
SOUTHWEST BOULEVARD NEAR THE SOUTH LOOP... ALONG COLLEGE HILLS
BOULEVARD....ALONG SUL ROSS BOULEVARD...ALONG PULLIAM...AND AT THE
INTERSECTION OF SPAULDING AND NORTH ARCHER.

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.

&&

LAT...LON 3160 10026 3121 10013 3117 10069 3111 10073
      3113 10116 3151 10122 3155 10085 3163 10062

$$

JMJ

1 follow-up statement

073 
WGUS74 KSJT 072002
FFSSJT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
302 PM CDT MON MAY 7 2012

TXC235-451-072230-
/O.CON.KSJT.FF.W.0002.000000T0000Z-120507T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IRION TX-TOM GREEN TX-
302 PM CDT MON MAY 7 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
CENTRAL TOM GREEN AND IRION COUNTIES...

AT 249 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS PORTIONS OF IRION 
AND TOM GREEN COUNTIES. 

FLOODING HAS BEEN REPORTED BY TRAINED STORM SPOTTERS AT...
HIGHWAY 67 NEAR THE IRION AND TOM GREEN COUNTY LINE AND AT  
SOUTHWEST BLVD AND LOOP 306 IN SAN ANGELO.   

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CHRISTOVAL...
MERTZON...SAN ANGELO...ARDEN...KNICKERBOCKER...SHERWOOD... 
TANKERSLEY...VANCOURT...VERIBEST AND WALL.

THIS INCLUDES THE LOW WATER CROSSINGS AT...
  JACKSON FROM KNICKERBOCKER TO S BRYANT...
  HOWARD AND WEBSTER...
  COLLEGE HILLS AND MILBROOK...
  SOUTHWEST BLVD AND LOOP 306...
  PARKWOOD AND LINDENWOOD...
  1500 BLOCK OF SPAULDING...
  300 BLOCK OF NORTH ARCHER...
  SUL ROSS AT RED ARROYO CROSSING...
  NORTH RIVER AND WEST 1ST...
  TRES RIOS AND LESTER...
  1800 BLOCK OF PREUSSER...
  1700 BOCK OF COKE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT MONDAY
EVENING FOR WEST CENTRAL TEXAS.

&&

LAT...LON 3160 10026 3121 10013 3117 10069 3111 10073
      3113 10116 3151 10122 3155 10085 3163 10062

$$

JMJ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 7:01 PM CDT	Special Weather Statement	SJT	Tom Green	29 min
May 6, 8:43 PM CDT	Special Weather Statement	SJT	Mason	32 min
May 6, 9:01 PM CDT	Special Weather Statement	SJT	Mason	29 min
May 6, 9:27 PM CDT	Special Weather Statement	SJT	Shackelford	33 min
May 6, 9:29 PM CDT	Special Weather Statement	SJT	Mason	61 min
May 6, 9:48 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	42 min
May 6, 10:18 PM CDT	Severe Thunderstorm Warning	SJT	Menard	42 min
May 6, 10:38 PM CDT	Special Weather Statement	SJT	Shackelford	37 min
May 6, 10:42 PM CDT	Tornado Warning	SJT	Kimble, Menard	33 min
May 6, 11:15 PM CDT	Tornado Warning	SJT	Kimble, Menard	25 min
May 7, 12:48 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Sterling	57 min
May 7, 1:16 PM CDT	Special Weather Statement	SJT	Tom Green	59 min
May 7, 1:23 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Tom Green	52 min
May 7, 1:57 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	48 min
May 7, 2:02 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Sterling, Tom Green	28 min
May 7, 2:21 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Tom Green	24 min
May 7, 2:44 PM CDT	Special Weather Statement	SJT	Concho	61 min
May 7, 2:53 PM CDT	Severe Thunderstorm Warning	SJT	Concho	52 min
May 7, 3:05 PM CDT	Severe Thunderstorm Warning	SJT	Irion, Schleicher, Tom Green	40 min
May 7, 3:12 PM CDT	Areal Flood Advisory	SJT	Concho	3 hr
May 7, 3:25 PM CDT	Special Weather Statement	SJT	Nolan	50 min
May 7, 3:34 PM CDT	Severe Thunderstorm Warning	SJT	Mason, Menard	41 min
May 7, 3:35 PM CDT	Special Weather Statement	SJT	Schleicher	55 min
May 7, 3:43 PM CDT	Severe Thunderstorm Warning	SJT	Crockett, Schleicher, Sutton	47 min
May 7, 3:53 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch, Menard	52 min
May 7, 4:03 PM CDT	Special Weather Statement	SJT	Taylor	57 min
May 7, 4:07 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch	38 min
May 7, 4:14 PM CDT	Areal Flood Advisory	SJT	McCulloch	3 hr
May 7, 4:18 PM CDT	Severe Thunderstorm Warning	SJT	Mason	42 min
May 7, 4:55 PM CDT	Severe Thunderstorm Warning	SJT	Mason	20 min
May 7, 5:19 PM CDT	Special Weather Statement	SJT	Crockett	56 min
May 7, 5:34 PM CDT	Special Weather Statement	SJT	San Saba	56 min
May 7, 5:57 PM CDT	Special Weather Statement	SJT	Crockett	63 min

Nearby

Flash Flood Warnings in Texas, 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; radar from the NEXRAD Level II archive.