Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS Houston/Galveston, TX

August 8, 2012Houston County, Texas

NWS Houston/Galveston, TX issued this special weather statement at Aug 8, 2012, 5:56 PM CDT for Houston County, Texas. It was in force for 49 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: Aug 8, 2012, 5:56 PM CDT (22:56 UTC)
Expired: Aug 8, 2012, 6:45 PM CDT
In force: 49 min
Issued by: NWS Houston/Galveston, TX

County Houston County, TX

The radar

The Ft Hood radar (KGRK), 178 km from the middle of the area, began a volume at 22:59 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

Shreveport, LA (KBAD), launched 12:00Z, 10.9 hours before the alert went out and 225 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: 2782 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 818 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 19 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 Aug 8, 3:47 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Aug 8, 3:47 PM CDT, 2 hours 9 minutes before

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Hazardous weather outlook, Aug 8, 7:03 AM CDT, 10 hours 53 minutes before

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In the hours before

Special weather statement, Aug 8, 4:58 PM CDT, 58 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
458 PM CDT WED AUG 8 2012

TXZ163-082300-
HOUSTON TX-
458 PM CDT WED AUG 8 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN HOUSTON COUNTY
UNTIL 600 PM CDT...

AT 454 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A STRONG THUNDERSTORM 7 MILES WEST OF GRAPELAND...OR 13
MILES NORTHWEST OF CROCKETT...MOVING SOUTHEAST AT 10 MPH.

WIND GUSTS UP TO 50 MPH...DANGEROUS LIGHTNING AND BRIEF HEAVY
RAINS WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
GRAPELAND AND LATEXO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO
AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR
ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL
WEATHER SERVICE.

&&

LAT...LON 3151 9512 3126 9562 3132 9567 3131 9566
      3134 9566 3135 9567 3136 9566 3142 9571
      3146 9571 3146 9575 3147 9572 3149 9574
      3151 9574 3152 9565 3155 9564 3158 9541
TIME...MOT...LOC 2154Z 328DEG 11KT 3146 9561

04

Special weather statement, Aug 8, 5:56 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
556 PM CDT WED AUG 8 2012

TXZ163-176-082345-
MADISON TX-HOUSTON TX-
556 PM CDT WED AUG 8 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MADISON AND
SOUTHWESTERN HOUSTON COUNTIES UNTIL 645 PM CDT...

AT 556 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A STRONG THUNDERSTORM 11 MILES SOUTHWEST OF CROCKETT...
MOVING SOUTHEAST AT 10 MPH.

HAIL UP TO THE SIZE OF PEAS AND WIND GUSTS UP TO 50 MPH WILL BE
POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
LOVELADY.

LAT...LON 3113 9536 3099 9565 3122 9573 3127 9573
      3129 9570 3129 9569 3129 9568 3130 9567
      3134 9556
TIME...MOT...LOC 2256Z 334DEG 9KT 3124 9562

04

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 4:58 PM CDT	Special Weather Statement	HGX	Houston	62 min
Aug 8, 6:41 PM CDT	Special Weather Statement	HGX	Trinity	49 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; radar from the NEXRAD Level II archive.