Alert archive / Texas / Special Weather Statements in 2011

Special Weather Statement, NWS Houston/Galveston, TX

July 3, 2011Trinity County, Texas

NWS Houston/Galveston, TX issued this special weather statement at Jul 3, 2011, 3:01 PM CDT for Trinity County, Texas. It was in force for 44 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 3, 2011, 3:01 PM CDT (20:01 UTC)
Expired: Jul 3, 2011, 3:45 PM CDT
In force: 44 min
Issued by: NWS Houston/Galveston, TX

County Trinity County, TX

The radar

The Houston radar (KHGX), 170 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 206 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: 1126 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1622 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 2, 6:26 PM CDT, 20 hours 35 minutes earlier.

Area forecast discussion, Jul 2, 6:26 PM CDT, 20 hours 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
626 PM CDT SAT JUL 2 2011

.AVIATION...
AREA OF SHOWERS AND A FEW THUNDERSTORMS CONTINUES MOVING SOUTHWEST
INTO THE AREA FROM HUNTSVILLE TO CONROE TO NORTH OF KIAH. THIS
AREA OF PCPN WILL CONTINUE PROPOGATING TO THE SOUTHWEST BEFORE
DISSIPATING AROUND 03/02Z. GUSTY WINDS OF 40KTS AND SOME SMALL
HAIL POSSIBLE WITH THESE STORMS THIS EVENING. EXPECT THINGS TO
BECOME MOSTLY VFR AROUND 02Z AS DAYTIME HEATING ENDS AND
THUNDERSTORMS DECREASE. VFR CONDITIONS AND LIGHT WINDS WILL
PREVAIL AFTER 02Z. EXPECT SOME SCATTERED TSTMS AGAIN ON SUNDAY BUT
NOT SURE EXACTLY WHERE OR HOW MANY SO I PUT CB IN THE TAF MID AFTERNOON.

&&

.PREV DISCUSSION... /ISSUED 537 PM CDT SAT JUL 2 2011/

UPDATE...
A QUICK UPDATE FOR THE ONGOING SHRA/TSRA. HAVE RAISED POPS NORTH
OF THE SEABREEZE (ARM-SGR-IAH-6R3) AND WEST OF THE OUTFLOW MOVING
INTO SETX FROM STORMS NEAR AND WEST OF THE THE DECAYING STATIONARY
FRONT IN LA. BEST RAIN CHANCES LOOK TO BE FROM LIBERTY COUNTY TO
NEAR HUNTSVILLE TO MADISONVILLE WHERE THE SEABREEZE COLLIDES WITH
THE OUTFLOWS TO THE NORTH. NOT EXPECTING ANY BIG RAINS JUST SOME
MUCH NEEDED SUMMERTIME POPCORN TSRA.
45

PREV DISCUSSION... /ISSUED 329 PM CDT SAT JUL 2 2011/

DISCUSSION...
CONVECTION FIRING UP JUST WEST SOUTHWEST OF THE OFFICE WITH QUITE
THE IMPRESSIVE RAIN SHAFT VIA SECURITY CAM. SCATTERED CELLS POPPING
ALONG THE SEA BREEZE BOUNDARY OVER EXTREME SW'ERN LIBERTY COUNTY TO
ACROSS BRAZORIA AND MATAGORDA COUNTIES. A WEAK EASTERN TEXAS BOUNDARY
(WITH MORE WIDELY SCATTERED POCKETS OF RAIN/ISOLATED THUNDER) SLOWLY
INCHING TOWARDS THE EASTERN EDGE OF THE FA MAY INTERACT WITH OUR LOCAL
SEA BREEZE. A BEARS WATCH AS THERE IS A SLIGHT PROB THAT THESE MERGING
BOUNDARIES COULD ENHANCE LATE DAY CONVECTION AND/OR INITIATE MORE AREAL
RAIN COVERAGE.

NO SIGNIFICANT CHANGE TO THE HOLIDAY FORECAST AS WHAT IS BEING EXPERIENCED
TODAY WILL BE SIMILAR TO THAT OF WHAT IS EXPECTED OVER THE FOURTH
OF JULY. UPPER RIDGING IS SLOWLY MIGRATING WESTWARD INTO THE WESTERN
PLAINS...WITH THE CENTER/AXIS EVENTUALLY SETTLING IN OVER THE FOUR
CORNERS. THE GFS SOLUTION SEEMS TO BE LEANING TOWARDS WHAT THE EURO
HAD BEEN STATING YESTERDAY...THAT OF A GENERAL WEAKNESS UNDER THE
ABOVE STATED RIDGE. AN INVERTED TROF...OR WEAK TUTT...MAY BE IN THE
CARDS THIS TIME NEXT WEEK. IF THIS DOES DEVELOP...THEN THE MUCH AWAITED
PATTERN CHANGE OVER TO MORE WIDESPREAD WET WOULD ENSUE. UNTIL THEN...IF
YOU ARE NOT ONE OF THE LUCKY ONES TO PICK UP 1 TO 2 QUICK INCHES FROM
AN AFTERNOON BREEZE STORM (AS WAS THE CASE TODAY OVER WESTERN GALVESTON
COUNTY)...THEN VERY HOT AND DRY WILL REMAIN THE THEME. 31

MARINE...
A RELATIVELY FLAT PRESSURE GRADIENT WILL PERSIST THE NEXT SEVERAL
DAYS RESULTING IN LIGHT WINDS ACROSS THE MARINE WATERS. SWELLS HAVE
DECREASED TO LESS THAN 3 FEET. TIDE LEVELS ARE EXPECTED TO REMAIN
NEAR NORMAL. 43

FIRE WEATHER...
DEW POINTS WILL CONTINUE TO MIX OUT THROUGH TUESDAY WITH AFTERNOON
RH VALUES FALLING TO BELOW 30 PERCENT AT TIMES. WINDS SHOULD REMAIN
LIGHT EACH AFTERNOON EXCEPT IN AND NEAR STORMS. ISOLATED STORMS WILL
BE POSSIBLE EACH AFTERNOON WITH HEATING. 43

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      74  99  74  99  74 /  20  20  20  20  20
HOUSTON (IAH)              73  99  73  98  73 /  20  20  20  20  20
GALVESTON (GLS)            80  92  80  92  80 /  20  20  20  20  20

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.
&&

DISCUSSION...45
AVIATION/MARINE...34

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 7:33 PM CDT	Special Weather Statement	HGX	Harris	57 min
Jul 2, 7:42 PM CDT	Special Weather Statement	HGX	Grimes	63 min
Jul 3, 4:45 PM CDT	Special Weather Statement	HGX	San Jacinto	60 min
Jul 3, 5:06 PM CDT	Special Weather Statement	HGX	Grimes	24 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.