Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 83, NWS Houston/Galveston, TX

May 12, 2003Austin County, Washington County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 12, 2003, 1:59 PM CDT for Austin County, Washington County, Texas. It was in force for 31 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
May 12, 2003, 1:59 PM CDT (18:59 UTC)
Expired
May 12, 2003, 2:30 PM CDT
In force
31 min
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

Counties Austin County, TX, Washington 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

Corpus Christi, TX (KCRP), launched 12:00Z, 7.0 hours before the alert went out and 274 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 2003-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1874 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 2003-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
1874 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
545 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

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

519 
WUUS54 KHGX 121859
SVRHOU
TXC015-477-121930-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
157 PM CDT MON MAY 12 2003

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WASHINGTON COUNTY IN SOUTHEAST TEXAS
  AUSTIN COUNTY IN SOUTHEAST TEXAS

* UNTIL 230 PM CDT

* AT 149 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR 
SHELBY...MOVING NORTHEAST AT 25 MPH. THIS STORM WILL LIKELY PRODUCE 
DIME TO ONE INCH DIAMETER HAIL.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  INDUSTRY...SHELBY
  BRENHAM

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 3003 9666 2991 9652 3011 9617 3029 9632

$$

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 May 12, 1:30 PM CDT, 29 minutes earlier.

Area forecast discussion, May 12, 1:30 PM CDT, 29 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
130 PM CDT MON MAY 12 2003

AS OF 18Z...WARM FRONT WAS LOCATED NEAR A LINE FROM NEAR BEAUMONT TO
JUST SOUTH OF INTERCONTINENTAL TO JUST SOUTH OF AUSTIN. DEWPOINTS IN
THE 70S HAVE ALREADY RETURNED INLAND...AND WILL CONTINUE TO SPREAD
INLAND AS THE FRONT LIFTS TO THE NORTH. AN AREA OF THUNDERSTORMS
CONTINUES TO APPROACH THE NORTHWESTERN PART OF OUR AREA THIS
AFTERNOON. IT IS LIKELY THAT ANY THUNDERSTORM ACTIVITY WILL REMAIN
ELEVATED AND WELL NORTH OF THE SURFACE FRONT.

A RETURN TO HOT AND HUMID CONDITIONS APPEARS TO BE IN THE WORKS FOR
SOUTHEAST TEXAS THIS WEEK. MID LEVEL RIDGE IS STILL FORECAST TO WORK
WESTWARD AND SET UP SHOP OVER NORTHERN MEXICO LATER THIS
WEEK...ALLOWING A NORTHWEST FLOW REGIME TO BECOME ESTABLISHED OVER
THE AREA. IT IS POSSIBLE WE COULD SEE SOME ISOLATED SHOWERS AND
THUNDERSTORMS AS WEAK IMPULSES MOVE ACROSS THE RIDGE...BUT
WIDESPREAD PRECIPITATION IS NOT LIKELY DUE TO THE STRONG...
QUASI-PERMANENT RIDGE THAT HAS AFFECTED THE AREA OVER THE PAST
SEVERAL WEEKS. IT LOOKS AS IF THIS WEEKEND WILL BRING THE NEXT
SIGNIFICANT CHANCE FOR RAIN AS A MODERATELY STRONG VORT MAX MOVES
SOUTHEASTWARD ACROSS THE SOUTHERN PLAINS.

AS FAR AS TEMPERATURES GO...WE WILL DEFINITELY SEE THE UPPER 80S BY
MID WEEK...AND PERHAPS THE LOW 90S BY THE END OF THE WEEK.

FOR MARINE INTERESTS...THE WINDS AND SEAS SHOULD RELAX AS THE
EVENING PROGRESSES. AT THIS TIME...WE ARE PLANNING ON NOT ISSUING A
CAUTION STATEMENT...BUT A FINAL DETERMINATION WILL NOT BE MADE UNTIL
ISSUANCE TIME.

.HGX...NONE.

PRELIMS...
CLL BB 065/087 070/090 072 21-
IAH BB 067/088 071/091 072 100
GLS BB 074/083 076/084 075 100
Hazardous weather outlook, May 12, 6:50 AM CDT, 7 hours 9 minutes before
GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-
131100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
650 AM CDT MON MAY 12 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT.
NO HAZARDOUS WEATHER EXPECTED.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.
A STORM SYSTEM MAY APPROACH THE REGION FROM THE NORTHWEST LATE FRIDAY
OR SATURDAY. SIGNIFICANT RAINFALL MAY BE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

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.