Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS Houston/Galveston, TX

July 7, 2012Polk County, Texas

NWS Houston/Galveston, TX issued this special weather statement at Jul 7, 2012, 3:17 PM CDT for Polk County, Texas. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 7, 2012, 3:17 PM CDT (20:17 UTC)
Expired: Jul 7, 2012, 4:00 PM CDT
In force: 43 min
Issued by: NWS Houston/Galveston, TX

County Polk County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.3 hours before the alert went out and 175 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: 2772 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: -5 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Houston/Galveston, TX wrote its last area forecast discussion before this special weather statement went out at Jul 7, 1:24 PM CDT, 1 hour 53 minutes earlier.

Area forecast discussion, Jul 7, 1:24 PM CDT, 1 hour 53 minutes before

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Hazardous weather outlook, Jul 7, 6:51 AM CDT, 8 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
651 AM CDT SAT JUL 7 2012

GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-
227-235>238-081200-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-
GALVESTON-GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-
MADISON-MATAGORDA-MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO-
TRINITY-WALKER-WALLER-WASHINGTON-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM-
WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM-
WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-WHARTON-
651 AM CDT SAT JUL 7 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS SHOULD DEVELOP OVER THE AREA
THIS AFTERNOON. SCATTERED RAINFALL ACCUMULATIONS OF ONE QUARTER
INCH WITH ISOLATED TOTALS OF 2 TO 3 THREE INCHES POSSIBLE.
OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A RAINY WET PERIOD ON TAP THIS WEEK. VERY MOIST AIR WILL FLOW INTO
THE AREA WITH A SERIES OF UPPER LEVEL DISTURBANCES MOVING IN FROM
THE EAST WILL COMBINE TO PRODUCE PERIODS OF SHOWERS AND
THUNDERSTORMS EACH DAY. RAINFALL ACCUMULATIONS OF 1 TO 2 INCHES
SHOULD BE COMMON. A WEAK COLD FRONT NEARS THE AREA ON TUESDAY AND
COULD HELP TO FOCUS HEAVIER RAINS ACROSS PORTIONS OF THE AREA.
OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Special weather statement, Jul 7, 2:44 PM CDT, 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
244 PM CDT SAT JUL 7 2012

TXZ178-179-200-072045-
SAN JANCINTO TX-POLK TX-LIBERTY TX-
244 PM CDT SAT JUL 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SAN JACINTO...
SOUTH CENTRAL POLK AND NORTHWESTERN LIBERTY COUNTIES UNTIL 345 PM
CDT...

AT 236 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A CLUSTER OF STRONG THUNDERSTORMS 10 MILES WEST OF
THICKET...MOVING SOUTHWEST AT 15 MPH.

WIND GUSTS UP TO 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCALIZED
1 TO 3 INCH RAINFALL AMOUNTS ARE ALSO POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
CLEVELAND...PLUM GROVE...NORTH CLEVELAND AND DAYTON LAKES.

LAT...LON 3000 9502 3046 9521 3051 9486 3050 9486
      3049 9473 3026 9465
TIME...MOT...LOC 1936Z 66DEG 14KT 3038 9481

Special weather statement, Jul 7, 3:17 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
317 PM CDT SAT JUL 7 2012

TXZ179-072100-
POLK TX-
317 PM CDT SAT JUL 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL POLK COUNTY UNTIL 400
PM CDT...

AT 312 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A CLUSTER OF STRONG THUNDERSTORMS ACROSS NORTHEAST POLK
COUNTY...MOVING SOUTHWEST AT 10 TO 15 MPH.

HAIL UP TO THE SIZE OF PEAS AND WIND GUSTS UP TO 40 MPH WILL BE
POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
LIVINGSTON...MOSCOW...CORRIGAN AND SEVEN OAKS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3101 9465 3084 9462 3058 9485 3084 9514
      3113 9479 3110 9474 3111 9471 3109 9466
      3110 9465 3109 9464 3106 9456
TIME...MOT...LOC 2012Z 51DEG 13KT 3090 9479

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 7, 2:44 PM CDT	Special Weather Statement	HGX	Liberty	61 min
Jul 7, 4:30 PM CDT	Severe Thunderstorm Warning	HGX	Houston, Trinity	30 min
Jul 7, 5:46 PM CDT	Special Weather Statement	HGX	Waller	44 min
Jul 7, 5:53 PM CDT	Severe Thunderstorm Warning	HGX	Harris	37 min

Nearby

Special Weather Statements in Texas, 2012 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive.