Alert archive / Texas / Special Weather Statements in 2009

Special Weather Statement, NWS Houston/Galveston, TX

July 19, 2009Brazos County, Texas

NWS Houston/Galveston, TX issued this special weather statement at Jul 19, 2009, 5:21 PM CDT for Brazos County, Texas. It was in force for 39 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 19, 2009, 5:21 PM CDT (22:21 UTC)
Expired: Jul 19, 2009, 6:00 PM CDT
In force: 39 min
Issued by: NWS Houston/Galveston, TX

County Brazos County, TX

The radar

The Ft Hood radar (KGRK), 106 km from the middle of the area, began a volume at 22:21 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, 10.4 hours before the alert went out and 303 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: 457 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 1343 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.8

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 19, 3:41 PM CDT, 1 hour 40 minutes earlier.

Area forecast discussion, Jul 19, 3:41 PM CDT, 1 hour 40 minutes before

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Hazardous weather outlook, Jul 19, 2:59 PM CDT, 2 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
259 PM CDT SUN JUL 19 2009

TXZ163-164-176>179-195>200-210>214-226-227-235>238-202000-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-
GALVESTON-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-
MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON-
WHARTON-
259 PM CDT SUN JUL 19 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT
THERE IS A SLIGHT RISK OF SEVERE WEATHER THIS AFTERNOON AND
TONIGHT ALONG AND NORTH OF A LINE FROM BRENHAM TO LIBERTY. AN
APPROACHING UPPER LEVEL DISTURBANCE WILL CONTINUE TO DRIVE
THUNDERSTORM DEVELOPMENT ACROSS PORTIONS OF NORTH TEXAS. THESE
THUNDERSTORMS WILL MOVE SOUTH INTO THE AREA LATE THIS AFTERNOON
AND THIS EVENING. THE PRIMARY THREAT WITH THESE STORMS WILL BE
DAMAGING WINDS AND HEAVY RAINFALL...ALTHOUGH SOME SMALL HAIL IS
POSSIBLE. SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE
ACROSS THE REST OF THE REGION AS THE SEABREEZE CONTINUES TO MOVE
INLAND DURING THE AFTERNOON AND EARLY EVENING. RAINFALL
ACCUMULATIONS OF UP TO 1 INCH ARE POSSIBLE WITH THESE STORMS WITH
SOME ISOLATED TOTALS OF 2 TO 3 INCHES...PRIMARILY ACROSS THE AREA
EAST OF INTERSTATE 45 AND NORTH OF INTERSTATE 10.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY
NORTHWEST FLOW ALOFT WILL CONTINUE THROUGH AT LEAST
MIDWEEK...BRINGING UPPER LEVEL DISTURBANCES SOUTH INTO THE REGION
LEADING TO SCATTERED THUNDERSTORMS DURING THE AFTERNOON HOURS
THROUGH WEDNESDAY.

TOWARDS THE END OF THE WEEK THE UPPER LEVEL HIGH PRESSURE SYSTEM
ACROSS THE WESTERN UNITED STATES WILL MOVE CLOSER TO THE REGION
INCREASING AFTERNOON HIGH TEMPERATURES AND LOWERING THE CHANCE OF PRECIPITATION.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND EVENING.

In the hours before

Special weather statement, Jul 19, 12:43 PM CDT, 4 hours 38 minutes before

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Special weather statement, Jul 19, 1:32 PM CDT, 3 hours 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
132 PM CDT SUN JUL 19 2009

TXZ214-238-191930-
CHAMBERS-GALVESTON-
132 PM CDT SUN JUL 19 2009

...SPECIAL WEATHER STATEMENT...

AT 131 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES WEST OF HIGH ISLAND...MOVING EAST
NORTHEAST AT 5 TO 10 MPH.

PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IN THE PATH OF THIS STORM INCLUDE...HIGH ISLAND.

GUSTY WINDS MAY CAUSE UNSECURED SMALL OBJECTS SUCH AS TRASH CANS TO
BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

LAT...LON 2954 9439 2951 9446 2952 9447 2957 9450
      2968 9436 2967 9435 2956 9436
TIME...MOT...LOC 1831Z 245DEG 5KT 2953 9443

Special weather statement, Jul 19, 3:56 PM CDT, 1 hour 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
356 PM CDT SUN JUL 19 2009

TXZ226-235-236-192200-
JACKSON-MATAGORDA-WHARTON-
356 PM CDT SUN JUL 19 2009

...SPECIAL WEATHER STATEMENT...

AT 354 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 8 MILES SOUTHEAST OF THE SOUTH TEXAS NUCLEAR
PLANT...MOVING WEST NORTHWEST AT 10 MPH.

PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IN THE PATH OF THIS STORM INCLUDE...SOUTH TEXAS NUCLEAR
PLANT...MIDFIELD...BLESSING...PALACIOS AND MARKHAM.

GUSTY WINDS MAY CAUSE UNSECURED SMALL OBJECTS SUCH AS TRASH CANS TO
BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

LAT...LON 2908 9635 2894 9585 2870 9575 2870 9577
      2873 9577 2873 9579 2869 9590 2867 9641
TIME...MOT...LOC 2055Z 109DEG 10KT 2886 9602

Special weather statement, Jul 19, 4:42 PM CDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
442 PM CDT SUN JUL 19 2009

TXZ176-192245-
MADISON-
442 PM CDT SUN JUL 19 2009

...SPECIAL WEATHER STATEMENT...

AT 437 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 19 MILES NORTHWEST OF MADISONVILLE...MOVING
SOUTHEAST AT 15 MPH.

THIS THUNDERSTORM PROMPTED A SEVERE THUNDERSTORM WARNING
EARLIER...BUT APPEARS TO HAVE WEAKENED SLIGHTLY OVER THE PAST
FIFTEEN MINUTES. IT IS STILL A VERY STRONG THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS...SMALL HAIL...AND DANGEROUS
CLOUD TO GROUND LIGHTNING ACROSS THE COUNTY.

ONE HALF INCH DIAMETER HAIL...WINDS GREATER THAN 50 MPH...ARE
POSSIBLE WITH THIS STORM.

LOCATIONS IN THE PATH OF THIS STORM INCLUDE...NORTH ZULCH...
NORMANGEE...MIDWAY AND MADISONVILLE.

GUSTY WINDS MAY CAUSE UNSECURED SMALL OBJECTS SUCH AS TRASH CANS TO
BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE OR NON-CONVERTIBLE
AUTOMOBILE UNTIL THIS STORM HAS PASSED.

LAT...LON 3093 9566 3085 9616 3101 9617 3108 9606
      3108 9603 3110 9599 3111 9581
TIME...MOT...LOC 2139Z 335DEG 15KT 3119 9605

Special weather statement, Jul 19, 5:21 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:31 PM CDT	Special Weather Statement	HGX	Harris	44 min
Jul 18, 9:23 PM CDT	Special Marine Warning	HGX		52 min
Jul 19, 12:43 PM CDT	Special Marine Warning	HGX		62 min
Jul 19, 1:32 PM CDT	Special Weather Statement	HGX	Chambers	58 min
Jul 19, 1:34 PM CDT	Special Marine Warning	HGX		56 min
Jul 19, 2:32 PM CDT	Special Marine Warning	HGX		58 min
Jul 19, 3:56 PM CDT	Special Weather Statement	HGX	Matagorda	64 min
Jul 19, 4:42 PM CDT	Special Weather Statement	HGX	Madison	63 min
Jul 19, 4:43 PM CDT	Severe Thunderstorm Warning	HGX	Jackson, Matagorda, Wharton	21 min
Jul 19, 5:31 PM CDT	Special Weather Statement	HGX	Walker	44 min
Jul 19, 5:40 PM CDT	Severe Thunderstorm Warning	HGX	Jackson	35 min
Jul 19, 5:48 PM CDT	Special Weather Statement	HGX	Madison	27 min
Jul 19, 6:12 PM CDT	Severe Thunderstorm Warning	HGX	Jackson	18 min
Jul 19, 6:14 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Grimes	31 min
Jul 19, 6:48 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson	27 min
Jul 19, 6:52 PM CDT	Special Weather Statement	HGX	Montgomery	53 min
Jul 19, 6:54 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery	36 min

Nearby

Special Weather Statements in Texas, 2009 Every special weather statement in 2009

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.