Alert archive / Texas / Special Weather Statements in 2011

Special Weather Statement, NWS Houston/Galveston, TX

January 30, 2011Houston County, Texas

NWS Houston/Galveston, TX issued this special weather statement at Jan 30, 2011, 3:47 PM CST for Houston County, Texas. It was in force for 58 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: Jan 30, 2011, 3:47 PM CST (21:47 UTC)
Expired: Jan 30, 2011, 4:45 PM CST
In force: 58 min
Issued by: NWS Houston/Galveston, TX

County Houston County, TX

The radar

The Ft Hood radar (KGRK), 189 km from the middle of the area, began a volume at 21:51 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 (KSHV), launched 12:00Z, 9.8 hours before the alert went out and 210 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: 543 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 597 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 198 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

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 Jan 30, 3:26 PM CST, 21 minutes earlier.

Area forecast discussion, Jan 30, 3:26 PM CST, 21 minutes before

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Hazardous weather outlook, Jan 30, 6:16 AM CST, 9 hours 31 minutes before

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In the hours before

Special weather statement, Jan 30, 2:45 PM CST, 1 hour 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
245 PM CST SUN JAN 30 2011

TXZ176-196-198-302145-
BRAZOS-GRIMES-MADISON-
245 PM CST SUN JAN 30 2011

...STRONG STORM IN NORTHERN BRAZOS COUNTY...

AT 236 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES NORTH OF BRYAN...MOVING NORTHEAST AT 15
MPH.

ONE HALF INCH DIAMETER HAIL...ARE POSSIBLE WITH THIS STORM.

LOCATIONS IN THE PATH OF THIS STORM INCLUDE...NORTH ZULCH...KURTEN...
IOLA...WIXON VALLEY...NORMANGEE AND BRYAN.

SEEK SHELTER IN A STURDY STRUCTURE OR NON-CONVERTIBLE AUTOMOBILE
UNTIL THIS STORM HAS PASSED.

LAT...LON 3088 9640 3099 9624 3100 9618 3108 9606
      3108 9605 3080 9588 3066 9638 3078 9645
TIME...MOT...LOC 2044Z 243DEG 14KT 3078 9634

Special weather statement, Jan 30, 2:51 PM CST, 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
251 PM CST SUN JAN 30 2011

TXZ164-179-302145-
POLK-TRINITY-
251 PM CST SUN JAN 30 2011

...STRONG STORM IN WESTERN TRINITY COUNTY...

AT 242 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 10 MILES WEST OF GROVETON OR 24 MILES SOUTHWEST
OF APPLE SPRINGS...MOVING NORTHEAST AT 10 MPH.

MARBLE SIZED HAIL IS POSSIBLE WITH THIS STORM.

LOCATIONS IN THE PATH OF THIS STORM INCLUDE...APPLE SPRINGS AND
AREAS NORTH OF GROVETON.

SEEK SHELTER IN A STURDY STRUCTURE OR NON-CONVERTIBLE AUTOMOBILE
UNTIL THIS STORM HAS PASSED.

LAT...LON 3132 9502 3101 9479 3092 9530 3107 9541
TIME...MOT...LOC 2050Z 247DEG 11KT 3103 9527

Special weather statement, Jan 30, 3:47 PM CST, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
347 PM CST SUN JAN 30 2011

TXZ163-302245-
HOUSTON-
347 PM CST SUN JAN 30 2011

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN HOUSTON COUNTY UNTIL
445 PM CST...

AT 344 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
RAPIDLY DEVELOPING THUNDERSTORM 10 MILES WEST OF CROCKETT...MOVING
NORTHEAST AT 15 MPH.

HAIL UP TO ONE HALF INCH IN DIAMETER...FREQUENT CLOUD TO GROUND
LIGHTNING...AND BRIEF HEAVY DOWNPOURS ARE POSSIBLE WITH THIS STORM.

LOCATIONS IN THE PATH OF THIS STORM INCLUDE...LATEXO AND CROCKETT.

AVOID TALL OUTDOOR OBJECTS THAT CAN ATTRACT LIGHTNING. IF YOU ARE
OUTDOORS AND HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.  SEEK SHELTER IN A STURDY STRUCTURE OR NON-CONVERTIBLE
AUTOMOBILE UNTIL THIS STORM HAS PASSED.

LAT...LON 3143 9514 3122 9565 3130 9571 3131 9570
      3130 9569 3133 9566 3135 9568 3136 9568
      3138 9570 3142 9571 3157 9554 3160 9529
TIME...MOT...LOC 2146Z 234DEG 15KT 3135 9562

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 30, 2:45 PM CST	Special Weather Statement	HGX	Madison	60 min
Jan 30, 2:51 PM CST	Special Weather Statement	HGX	Trinity	54 min
Jan 30, 4:57 PM CST	Special Weather Statement	HGX	Houston	63 min

Nearby

Special Weather Statements in Texas, 2011 Every special weather statement in 2011

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.