Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 142, NWS Houston/Galveston, TX

July 11, 2003Harris County, Waller County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jul 11, 2003, 4:01 PM CDT for Harris County, Waller 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 11, 2003, 4:01 PM CDT (21:01 UTC)
Expired
Jul 11, 2003, 4:45 PM CDT
In force
44 min
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

Counties Harris County, TX, Waller County, TX

The radar

The Houston radar (KHGX), 71 km from the middle of the area, began a volume at 21:01 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.0 hours before the alert went out and 245 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 2003-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1960 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 2003-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1960 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
36 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.

212 
WUUS54 KHGX 112101
SVRHOU
TXC201-473-112145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
400 PM CDT FRI JUL 11 2003

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WALLER COUNTY IN SOUTHEAST TEXAS
  HARRIS COUNTY IN SOUTHEAST TEXAS

* UNTIL 445 PM CDT

* AT 356 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3
  MILES NORTH OF ADDICKS...MOVING WEST AT 10 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  JERSEY VILLAGE...HEDWIG VILLAGE...MEMORIAL
  ADDICKS
  KATY...WADSWORTH

GUSTY WINDS IN EXCESS OF 60 MPH AND LARGE HAIL ARE LIKELY WITH THIS 
STORM. 

MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. STAY AWAY FROM WINDOWS

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 2974 9551 2971 9568 2978 9585 2977 9596
          2991 9596 2994 9554

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 11, 2:55 PM CDT, 1 hour 6 minutes earlier.

Area forecast discussion, Jul 11, 2:55 PM CDT, 1 hour 6 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
255 PM CDT FRI JUL 11 2003

STILL EXPECTING CONVECTION TO FIRE ALONG THE SEABREEZE AND LEFTOVER
OUTFLOW BOUNDARY THIS AFTN. HOWEVER THE ADDITIONAL REMNANT/OVERNITE
STORMS MOVING ACROSS THE NRN ZONES ARE THE ONES WE ARE TAKING A BIT
MORE NOTICE OF. THIS SMALL COMPLEX APPEARS TO BE MOVING INTO A VERY
UNSTABLE AMS AND AS A RESULT...THIS PORTION OF THE CWA HAS BEEN PUT
IN A SVR WATCH FOR THE REMAINDER OF THE AFTN.

THE REST OF THE FORECAST PCKG NOT AS CLEAR CUT AS THE MODELS WOULD
LIKE TO PORTRAY EITHER. PROGGED TRENDS WOULD SEEM TO INDICATE SOME
DRYING IS IN ORDER FOR THE CWA THE NEXT COUPLE OF DAYS AS PWS DROP
TO AOA 1.5 (SAVE FOR THE ERN CWA/COAST). THE BUILDING UPPER RIDGE
LOOKS TO BE THE PRIMARY CULPRIT. HOWEVER...HAVING SAID ALL OF THIS
AM INCLINED TO STILL KEEP POPS ABOVE GUIDANCE THE NEXT DAY OR SO.
THIS TREND OF LOWER PWS HAS BEEN ADVERTISED BY THE MODELS THE LAST
SEVERAL RUNS BUT HAS YET TO REALLY MATERIALIZE. SO WILL LIKELY ERR
ON THE SIDE OF WET FOR THE TIME BEING. PERSISTENT UPPER LEVEL DIV-
ERGENCE AND SPORADIC WEAK S/W ACTIVITY FROM THE INCREASINGLY NNWLY
FLOW ALOFT ALSO MAKING A GOOD CASE FOR BETTER THAN SLIGHT CHC POPS
TOMORROW AND SUN. AS FOR T.S. CLAUDETTE...THE OFFICIAL TRACK STILL
PUSHES THE SYSTEM INTO FAR S TX EARLY NEXT WEEK. SO...UNLESS SOME-
THING REALLY DRAMATIC COMES FROM THE NEXT HOTLINE CALL...WILL PRO-
BABLY KEEP WITH WHAT WE ALREADY HAVE IN THE EXTENDED. 41/37/45

.HGX...NONE.

.PRELIMS...
CLL BB 074/097 073/095 074 321
IAH BB 076/095 074/095 074 332
GLS BB 080/090 079/090 080 332
Hazardous weather outlook, Jul 11, 6:54 AM CDT, 9 hours 7 minutes before
GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-112300-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
654 AM CDT FRI JUL 11 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT.
A TROUGH OF LOW PRESSURE WILL MOVE THROUGH THE AREA TODAY. SHOWERS
AND THUNDERSTORMS WILL DEVELOP ALONG THIS FEATURE. SOME OF THE
STORMS WILL HAVE THE POTENTIAL TO PRODUCE SMALL HAIL THIS MORNING AND
GUSTY WINDS THIS AFTERNOON. RAINFALL WILL AVERAGE BETWEEN A HALF
AND ONE INCH TODAY. STORM MOTION WILL BE SLOW...SO A FEW SPOTS
WILL RECEIVE GREATER THAN 2 INCHES OF RAIN.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY.
TROPICAL STORM CLAUDETTE WAS APPROACHING THE YUCATAN THIS MORNING AND
WILL ENTER THE GULF OF MEXICO LATER THIS AFTERNOON. MODEL SOLUTIONS
VARY ON THE FUTURE TRACK OF THIS STORM...BUT THE CURRENT TROPICAL
PREDICTION CENTER FORECAST TAKES CLAUDETTE INTO THE WEST CENTRAL GULF
OF MEXICO ON MONDAY. INTERESTS ALONG THE UPPER TEXAS COAST SHOULD
MONITOR FUTURE FORECASTS FOR TRACK INFORMATION.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

In the hours before

Special weather statement, Jul 11, 11:05 AM CDT, 4 hours 56 minutes before
GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-227-
235>238-120500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1105 AM CDT FRI JUL 11 2003

...TROPICAL STORM CLAUDETTE MOVING INTO THE GULF...

TROPICAL STORM CLAUDETTE MOVING OFF THE NORTHERN YUCATAN COAST
EARLY THIS AFTEROON AND WILL CONTINUE TO TRACK NORTHWEST TODAY.
THE TROPICAL PREDICTION CENTER IS FORECASTING THE STORM TO MOVE
NORTHWEST THROUGH EARLY SUNDAY MORNING THEN A RIDGE OF HIGH PRESSURE
OVER THE WESTERN UNITED STATES WILL BEGIN STEERING THE STORM WEST. THE
CURRENT FORECAST TRACK MAKES LANDFALL IN NORTHERN MEXICO OR SOUTHERN
TEXAS MONDAY MORNING AS A WEAK HURRICANE. SOME UNCERTAINTY IS PRESENT
IN THE SPEED OF FORECAST TRACK OF THE STORM AFTER SUNDAY...THOUGH THE
BEST GUIDANCE AT THE MOMENT INDICATES THE STORM SHOULD TURN WEST.

CURRENTLY THE PRIMARY ISSUE FOR THE UPPER TEXAS COAST IS EXPECTED TO
BE SWELLS...HIGH SURF...DANGEROUS RIP CURRENTS AND ELEVATED TIDES AS
WAVES GENERATED FROM THE WIND FIELD SURROUNDING THE STORM SPREAD AWAY
FROM THE STORM. SEAS IN THE UPPER TEXAS COASTAL WATERS SHOULD BE ON
THE INCREASE SATURDAY AFTERNOON WITH THE ARRIVAL OF THE STORMS FIRST
SWELLS. CURRENTLY SEAS SHOULD BE BUILDING TO 6 FEET SATURDAY AND TO
10 FEET WELL OFFSHORE ON SUNDAY. EASTERLY WINDS OF 15 TO 25 KNOTS
WILL LIKELY BE PRESENT OVER THE COASTAL WATERS BEYOND 20 NM OF SHORE
ON SUNDAY IF THE STORMS INTENSITY AND TRACK FORECASTS ARE CORRECT.
TIDES OF AROUND 1 TO 2 FEET ABOVE NORMAL MAY BE POSSIBLE SUNDAY
THROUGH TUESDAY.

CLOSE ATTENTION SHOULD CONTINUE ON FORECASTS OF THE STORMS STRENGTH
AND TRACK THIS WEEKEND. THE TROPICAL PREDICTION CENTER WILL BE
ISSUING MORE NUMEROUS FORECASTS AS THIS STORM TRACKS ACROSS THE GULF
WITH THE NEXT UPDATE AT 1 PM.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 3:07 PM CDTSevere Thunderstorm WarningHGXBrazos, Burleson38 min
Jul 11, 3:48 PM CDTSevere Thunderstorm WarningHGXBrazos, Burleson27 min
Jul 11, 4:49 PM CDTSevere Thunderstorm WarningHGXColorado, Fort Bend, Wharton41 min
Jul 11, 5:55 PM CDTSpecial Marine WarningHGX2 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2003Every severe thunderstorm warning in 2003

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.