Alert archive / Texas / Tornado Warnings in 2003

Tornado Warning 19, NWS Houston/Galveston, TX

June 15, 2003Matagorda County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Jun 15, 2003, 9:40 AM CDT for Matagorda County, Texas. It was in force for 35 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
Jun 15, 2003, 9:40 AM CDT (14:40 UTC)
Expired
Jun 15, 2003, 10:15 AM CDT
In force
35 min
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

County Matagorda County, TX

The radar

The Houston radar (KHGX), 103 km from the middle of the area, began a volume at 14:41 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 tornado 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

Corpus Christi, TX (KCRP), launched 12:00Z, 2.7 hours before the alert went out and 192 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, Corpus Christi, TX at 12:00Z on 2003-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2701 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, Corpus Christi, TX at 12:00Z on 2003-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 square meters per square second.193958Sfc1 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
2701 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
-28 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.7

Open this sounding in Storm Lab

The text

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

777 
WFUS54 KHGX 151440
TORHOU
TXC321-151515-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
939 AM CDT SUN JUN 15 2003

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
  MATAGORDA COUNTY IN SOUTHEAST TEXAS

* UNTIL 1015 AM CDT

* AT 936 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF  
PRODUCING A TORNADO 15 MILES SOUTHEAST OF BAY CITY...MOVING EAST AT 
35 MPH. THE MATAGORDA COUNTY SHERIFFS OFFICE HAS RECEIVED NUMEROUS 
REPORTS OF FUNNEL CLOUDS AND TWO FUNNEL CLOUDS HAVE APPARENTLY 
TOUCHED THE GROUD...BECOMING TORNADOES. TORNADOES HAVE BEEN REPORTED 
NEAR WADSWORTH AND MARKHAM ALONG HIGHWAY 60.

MOVE TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON YOUR CAR
OR MOBILE HOME FOR A STRONG SHELTER 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 2903 9608 2866 9595 2876 9566 2914 9588

$$

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jun 15, 3:58 AM CDT, 5 hours 42 minutes earlier.

Area forecast discussion, Jun 15, 3:58 AM CDT, 5 hours 42 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
358 AM CDT SUN JUN 15 2003

UPPER TROUGH OVER NORTH-CENTRAL TEXAS SLOWLY TRANSLATING SOUTHEAST...
SHORT WAVE ROTATING AROUND THE SOUTHWEST END OF THE TROUGH ENHANCING
DIFFLUENCE ALOFT. THUNDERSTORM COMPLEX NEAR WACO-MARLIN AREA BECOMING
OUTFLOW DOMINATED AND MOVING QUICKLY SOUTHEAST. (THANKS FTW FOR COOR)
THESE STORMS SHOULD MOVE SOUTHEAST INTO THE FA EARLY THIS MORNING AND
MAY WEAKEN AS THEY GET AWAY FROM THE COOLER AIR ALOFT...BUT THAT MAY
BE OFFSET BY THE GREATER MOISTURE. IF THEY DO WEAKEN THEN THE AREA MAY
BE RIPE FOR A GOOD SEABREEZE EVENT WITH LEFT EXIT REGION OF A
CYCLONICALLY CURVED UPPER SPEED MAX IMPINGING ON THE AREA AROUND
18Z...WILL CARRY 50-60 POPS TODAY. SOME MARGINAL THREAT HEAVY
RAIN/SEVERE TODAY BUT NOT VERY CONFIDENT OF IT AT THIS POINT...PERHAPS
A LITTLE GREATER CHANCE NEAR THE SEABREEZE THIS AFTERNOON. WILL NOT
ADD MENTION OF THIS AT THE MOMENT. EXPECT THE MAJORITY OF CONVECTION
TO BE FOCUSING OVER THE SOUTHERN FA BEGINNING TONIGHT THROUGH
TUESDAY...AS DIFFUSE FRONTAL BOUNDARY SAGS SOUTH INTO THE NORTHERN
FA. STILL SOME SIGNIFICANT DIFFERENCES IN ORIENTATION OF UPPER
TROUGH AS MODELS DIVERGE IN THEIR SOLUTIONS. ECMWF STILL LIFTS THE
TROUGH OUT FASTER. OTHER BIT OF INTEREST IS THE CONVECTION IN THE
CARRIBEAN...AND EVENTUAL TRACK OF THIS MASS OF MOISTURE. CURRENT
GUIDANCE INDICATES THE MOISTURE SHOULD LINGER OVER THE BAY OF
CAMPECHE TUESDAY-THURSDAY THEN BE MOVING INTO SOUTHEAST TEXAS AND
POINTS EASTWARD FRIDAY OR SATURDAY. COULD GET WET DOWN THIS WAY.

45/34

.HGX...NONE.

.PRELIMS...
CLL TE 88/70 88/71 89 643
IAH TE 88/72 88/73 89 544
GLS TE 87/79 87/78 88 544
Hazardous weather outlook, Jun 15, 6:30 AM CDT, 3 hours 10 minutes before
GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-
161100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
630 AM CDT SUN JUN 15 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT.
A LINE OF SHOWERS AND THUNDERSTORMS WILL MOVE SOUTH INTO THE AREA
BRINGING GUSTY NORTH WINDS OF 20 TO 40 MPH. SHOWERS AND THUNDERSTORMS
SHOULD DEVELOP ALONG THE SEABREEZE LATE THIS MORNING AND MOVE SLOWLY
INLAND. BRIEF HEAVY DOWNPOURS MAY BRING RAINFALL ACCUMULATIONS OF
AROUND 1 INCH BUT SHOULD NOT POSE MUCH THREAT OF FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 14, 9:22 PM CDTSevere Thunderstorm WarningHGXHarris38 min
Jun 15, 8:54 AM CDTSpecial Marine WarningHGX2 hr
Jun 15, 10:55 AM CDTSpecial Marine WarningHGX2 hr
Jun 15, 10:55 AM CDTSpecial Marine WarningHGX2 hr

Nearby

Tornado Warnings in Texas, 2003Every tornado warning in 2003Tornadoes 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.