Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 147, NWS Houston/Galveston, TX

July 23, 2003Madison County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jul 23, 2003, 8:04 AM CDT for Madison County, Texas. It was in force for 56 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 23, 2003, 8:04 AM CDT (13:04 UTC)
Expired: Jul 23, 2003, 9:00 AM CDT
In force: 56 min
Issued by: NWS Houston/Galveston, TX
Area: Counties, with a storm outline in the text

County Madison County, TX

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

Fort Worth, TX (KFWD), launched 12:00Z, 1.1 hours before the alert went out and 242 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: 93 J/kg
Mixed-layer CIN: -277 J/kg
Mixed-layer LCL: 1106 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -2.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

530 
WUUS54 KHGX 231304
SVRHOU
TXC313-231400-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
803 AM CDT WED JUL 23 2003

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MADISON COUNTY IN SOUTHEAST TEXAS

* UNTIL 900 AM CDT

* AT 800 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15
  MILES NORTH OF MADISONVILLE...MOVING SOUTH AT 35 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  NORMANGEE
  MADISONVILLE
  NORTH ZULCH

EXPECT WINDS IN EXCESS OF 55 MPH WITH THIS THUNDERSTORM. 

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

STRONG WINDS MAY KNOCK DOWN TREES AND POWER LINES OR DAMAGE
BUILDINGS. TAKE COVER NOW

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 3116 9579 3110 9614 3085 9616 3087 9596
          3089 9580 3093 9574

$$

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 23, 3:30 AM CDT, 4 hours 34 minutes earlier.

Area forecast discussion, Jul 23, 3:30 AM CDT, 4 hours 34 minutes before

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
330 AM CDT WED JUL 23 2003

CONVECTION STARTING TO INCREASE IN AREAL COVERAGE OVER NE ZONES AS
TSTM CLUSTER FROM TYLER TO NACHITOCHES CONTINUE MOVING SSE. SURFACE
ANALYSIS WOULD INDICATE FRONTAL BOUNDARY STILL QUITE NORTH OF OUR
CWFA NEAR THE RED RIVER. PWATS NEAR 2 INCHES OVER OUR REGION W/CAPES
NEAR 4000 J/KG AND LITTLE TO NO CAP. OUTFLOW BOUNDARY FROM CONVECTION
EXPECTED TO MOVE ACROSS CWFA TODAY WITH FRONT STAYING JUST NORTH AND
WASHING OUT. EXPECT CONVECTION TO BECOME ACTIVE THIS MORNING AS
MOISTURE RIDGE AXIS MOVES SOUTH. HIGHEST POPS SHOULD BE OVER NE ZONES
DURING MORNING W/HIGHER POPS SHIFTING TO SOUTHERN ZONES BY
AFTERNOON. FOCUS OF CONVECTION WILL MOVE EAST OF OUR REGION BY
TONIGHT. DRYING EXPECTED TONIGHT W/PWATS LOWERING TO ABOUT 1.5
INCHES. THURSDAY WILL SEE A RETURN TO A NORMAL SUMMER PATTERN
W/SLIGHT CHANCE AFTERNOON/EARLY EVE CONVECTION. MODELS SUGGEST
MID LEVEL TROUGH MOVING ACROSS OUR REGION ON SATURDAY W/BUT HIGHER
MOISTURE LEVELS REMAINING SOUTH. WEAK SURFACE RIDGE OF HIGH PRESSURE
WILL RETURN OVER SE CONUS AND NORTHERN GULF TOWARD END OF WEEK AND
INTO WEEKEND. UPPER HIGH CENTER WILL RETREAT WEST SOMEWHAT BY EARLY NEXT
WEEK AS UPPER TROUGH MOVING ACROSS GREAT LAKES STARTS TO INCREASE IN
AMPLITUDE. MARINE REGION WILL CONTINUE W/A LIGHT TO MODERATE
SOUTHERLY FLOW THROUGH THE REMAINDER OF THE WEEK AND INTO THE
WEEKEND.

37/42

.HGX...NONE.

CLL EB 092/072 094/074 095 422
IAH EB 093/074 094/074 095 422
GLS EB 089/079 090/080 090 422
NE  EB                     522

Hazardous weather outlook, Jul 23, 5:00 AM CDT, 3 hours 4 minutes before

GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-241200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
500 AM CDT WED JUL 23 2003

...SLIGHT RISK OF SEVERE THUNDERSTORMS OVER SOUTHEAST TEXAS TODAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS.

.DAY ONE...TODAY.
A WEAK COOL FRONT WILL APPROACH THE NORTHERN PORTIONS OF
SOUTHEAST TEXAS AND STALL. SHOWERS AND THUNDERSTORMS ARE
EXPECTED TO DEVELOP ALONG AND AHEAD OF THIS FEATURE WITH THE
GREATEST RAIN CHANCES OVER THE EASTERN PORTIONS OF THE REGION.
OUTFLOW BOUNDARIES FROM THE THUNDERSTORMS MOVING SOUTH WILL SERVE AS
A FOCUS FOR ADDITIONAL CONVECTION ACROSS THE REGION TODAY. A FEW
STORMS COULD BECOME SEVERE. DAMAGING WINDS AND DIME SIZED HAIL WILL BE
THE MAIN SEVERE WEATHER THREATS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
THE ASSISTANCE OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE WEATHER
OPERATIONS...MAY BE NEEDED TODAY.

Nearby

Severe Thunderstorm Warnings in Texas, 2003 Every 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.