Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS Houston/Galveston, TX

March 20, 2012Brazos County, Burleson County, Washington County, Texas

NWS Houston/Galveston, TX issued this special weather statement at Mar 20, 2012, 2:24 AM CDT for Brazos County, Burleson County, Washington County, Texas. It was in force for 51 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: Mar 20, 2012, 2:24 AM CDT (07:24 UTC)
Expired: Mar 20, 2012, 3:15 AM CDT
In force: 51 min
Issued by: NWS Houston/Galveston, TX

Counties Brazos County, TX, Burleson County, TX, Washington County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 7.4 hours before the alert went out and 316 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: 2851 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 778 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.0

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 Mar 19, 11:56 PM CDT, 2 hours 28 minutes earlier.

Area forecast discussion, Mar 19, 11:56 PM CDT, 2 hours 28 minutes before

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Hazardous weather outlook, Mar 19, 10:15 PM CDT, 4 hours 9 minutes before

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In the hours before

Special weather statement, Mar 20, 2:24 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
224 AM CDT TUE MAR 20 2012

TXZ195>197-200815-
BRAZOS-BURLESON-WASHINGTON-
224 AM CDT TUE MAR 20 2012

...SIGNIFICANT WEATHER ADVISORY...

AT 212 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR BASTROP TO
MILANO...MOVING NORTHEAST AT 55 MPH.

WINDS GREATER THAN 40 MPH...CONTINUOUS CLOUD TO GROUND LIGHTNING...
AND HEAVY DOWNPOURS ARE LIKELY WITH THESE STORMS.

LOCATIONS IN THE PATH OF THESE STORMS INCLUDE...WELLBORN...QUARRY...
MILLICAN...KURTEN...INDEPENDENCE...CHRIESMAN...WIXON VALLEY...
SNOOK...COLLEGE STATION...CALDWELL...BURTON...AND BRYAN.

RAINFALL RATES BETWEEN ONE AND TWO INCHES PER HOUR ARE POSSIBLE IN
THE STRONGEST STORMS. MINOR FLOODING OF LOW-LYING AREAS AND ROADWAYS
MAY OCCUR.

GUSTY WINDS MAY CAUSE UNSECURED SMALL OBJECTS SUCH AS TRASH CANS TO
BLOW AROUND. AVOID TALL OUTDOOR OBJECTS THAT CAN ATTRACT LIGHTNING
AND DO NOT USE ELECTRICAL APPLIANCES OR A CORDED TELEPHONE A THE
LIGHTNING THREAT HAS PASSED. SEEK SHELTER IN A STURDY STRUCTURE OR
NON-CONVERTIBLE AUTOMOBILE UNTIL THESE STORMS HAVE PASSED.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 AM CDT FOR THE
WARNED AREA.

LAT...LON 3057 9696 3074 9662 3070 9656 3074 9647
      3091 9636 3098 9624 3082 9617 3059 9619
      3045 9613 3042 9609 3038 9614 3033 9615
      3009 9664 3014 9666 3014 9677 3016 9680
      3024 9675 3029 9666 3031 9674 3047 9691
TIME...MOT...LOC 0717Z 240DEG 46KT 3075 9679 3031 9720
          3001 9733 2972 9767

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 20, 3:29 AM CDT	Special Weather Statement	HGX	Brazos, Burleson, Madison, Washington	61 min
Mar 20, 3:48 AM CDT	Special Weather Statement	HGX	Brazos, Burleson, Madison, Washington	42 min
Mar 20, 3:59 AM CDT	Areal Flood Advisory	HGX	Brazos, Burleson	2 hr
Mar 20, 4:59 AM CDT	Areal Flood Advisory	HGX	Austin, Brazos, Burleson, Colorado, Grimes, Madison and 1 more	2 hr
Mar 20, 5:25 AM CDT	Special Weather Statement	HGX	Austin, Colorado	65 min
Mar 20, 5:38 AM CDT	Severe Thunderstorm Warning	HGX	Austin, Colorado, Waller, Washington, Wharton	52 min
Mar 20, 5:53 AM CDT	Special Marine Warning	HGX		112 min
Mar 20, 6:39 AM CDT	Special Weather Statement	HGX	Montgomery, Waller	66 min
Mar 20, 7:32 AM CDT	Special Weather Statement	HGX	Fort Bend	58 min
Mar 20, 7:44 AM CDT	Special Marine Warning	HGX		2 hr
Mar 20, 7:45 AM CDT	Tornado Warning	HGX	Harris	30 min
Mar 20, 7:49 AM CDT	Areal Flood Advisory	HGX	Harris, Montgomery	3 hr
Mar 20, 7:59 AM CDT	Areal Flood Advisory	HGX	Austin, Burleson, Washington	61 min
Mar 20, 8:08 AM CDT	Coastal Flood Statement	HGX	Brazoria, Chambers, Galveston, Harris, Matagorda	7 hr
Mar 20, 8:17 AM CDT	Tornado Warning	HGX	Brazoria	23 min
Mar 20, 8:34 AM CDT	Special Weather Statement	HGX	Harris	56 min
Mar 20, 8:41 AM CDT	Special Marine Warning	HGX		94 min
Mar 20, 9:02 AM CDT	River Flood Warning	HGX	Brazos, Grimes, Madison	5 days
Mar 20, 9:02 AM CDT	River Flood Warning	HGX	Burleson, Lee	48 hr
Mar 20, 9:02 AM CDT	River Flood Warning	HGX	Burleson, Lee	4 days
Mar 20, 9:18 AM CDT	Special Weather Statement	HGX	Liberty	57 min
Mar 20, 9:21 AM CDT	River Flood Warning	HGX	Montgomery	60 hr
Mar 20, 9:21 AM CDT	River Flood Warning	HGX	Harris, Liberty	6 days
Mar 20, 9:29 AM CDT	River Flood Warning	HGX	Austin, Fort Bend, Wharton	4 days
Mar 20, 9:29 AM CDT	River Flood Warning	HGX	Brazoria, Fort Bend, Wharton	22 hr
Mar 20, 9:32 AM CDT	Special Weather Statement	HGX	Chambers, Galveston	43 min
Mar 20, 10:02 AM CDT	Special Marine Warning	HGX		88 min
Mar 20, 10:13 AM CDT	Areal Flood Advisory	HGX	Brazoria, Chambers, Galveston	62 min
Mar 20, 11:27 AM CDT	Special Marine Warning	HGX		93 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.