Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 96, NWS Houston/Galveston, TX

May 12, 2000Brazos County, Grimes County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 12, 2000, 10:36 PM CDT for Brazos County, Grimes County, Texas. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
May 12, 2000, 10:36 PM CDT (03:36 UTC)
Expired
May 12, 2000, 11:15 PM CDT
In force
39 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Brazos County, TX, Grimes County, TX

What was reported inside it

TimeReportWhereRemark
May 12, 10:45 PM CDTThunderstorm WindAnderson, TXTrees down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 12, 8:30 PM CDTSevere Thunderstorm WatchSPC6 hr
May 12, 8:45 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.6 hours before the alert went out and 280 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 00:00Z on 2000-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2090 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 00:00Z on 2000-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 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
2090 J/kg
Mixed-layer CIN
-146 J/kg
Mixed-layer LCL
885 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
90 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.

305 
WUUS54 KHGX 130336
SVRHOU
TXC041-185-130415-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1036 PM CDT FRI MAY 12 2000

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRIMES COUNTY IN SOUTHEAST TEXAS
  SOUTHERN BRAZOS COUNTY IN SOUTHEAST TEXAS

* UNTIL 1115 PM CDT

* AT 1035 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3   
  MILES NORTHEAST OF MILLICAN...MOVING EAST SOUTHEAST AT 20 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM                   
  INCLUDE...        
  AREAS ALONG STATE HIGHWAY 6 BETWEEN COLLEGE STATION AND NAVASOTA   
  ANDERSON
  ROANS PRAIRIE

THE BRAZOS COUNTY SHERIFFS OFFICE REPORTED TREES DOWN NORTH OF 
BRYAN WHEN THESE STORMS MOVED THROUGH AFTER 1000 PM.

MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS.

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 3053 9631 3030 9612 3032 9582 3061 9587

&

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, 8:45 PM CDT, 1 hour 51 minutes earlier.

Area forecast discussion, May 12, 8:45 PM CDT, 1 hour 51 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
845 PM CDT FRI MAY 12 2000

WW 281 AND 282 JUST ISSUED FOR NORTHERN HALF OF AREA. LINE OF
THUNDERSTORMS AHEAD OF FRONT NOW WELL ORGANIZED.  VERY MOIST
BOUNDARY LAYER AND STEEP LAPSE RATE ABOVE SO EXPECT DAMAGING
STRAIGHT LINE WINDS AND SOME LARGE HAIL.  OUTFLOW SHOULD PROVIDE
SUFFICIENT LIFT TO OVERCOME CAP AND KEEP THUNDERSTORMS GOING TO THE
COAST.  WHILE COOLING OF THE BOUNDARY LAYER WILL LOWER CAPE...HAVE
SEEN ENOUGH OF THESE CONTINUE SEVERE OVERNIGHT SO WILL UPDATE WITH
HIGHER POPS AND SEVERE WORDING AREAWIDE.

30

.KHGX...NONE.

In the hours before

Special weather statement, May 12, 9:35 PM CDT, 1 hour 1 minute before
TXZ163-164-176>179-195>199-210>212-130400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
935 PM CDT FRI MAY 12 2000

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 2 AM SATURDAY
MORNING...

THE SEVERE STORMS PREDICTION CENTER HAS ISSUED A SEVERE
THUNDERTORM WATCH VALID UNTIL 2 AM FOR THE FOLLOWING COUNTIES...
BURLESON...BRAZOS...MADISON...HOUSTON...TRINITY...POLK...SAN
JACINTO...MONTGOMERY...WALKER...GRIMES...WALLER...AUSTIN...
WASHINGTON AND COLORADO.  LARGE HAIL AND DAMAGING WINDS ARE
EXPECTED FROM THUNDERSTORMS MOVING THROUGH THE WATCH AREA.

AT 930 PM...LINES OF STRONG TO SEVERE THUNDERSTORMS WERE
LOCATED FROM NEAR LONGVIEW TO CORSICANA AND FROM NORTH OF HEARNE TO
WEST OF AUSTIN.  THE LINES WERE MOVING SOUTHEAST AT 20 MPH.  THIS
SECOND LINE WILL BE ENTERING THE AREA FROM CALDWELL TO MADISONVILLE
AFTER 10 PM.  THUNDERSTORMS SHOULD CONTINUE MOVING SOUTHEAST
INTO SOUTHEAST TEXAS THROUGH THE NIGHT.

STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA FOR THE LATEST
FORECASTS AND WARNINGS ON THIS SEVERE WEATHER SITUATION.

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 10:56 PM CDTSevere Thunderstorm WarningHGXMontgomery, Walker34 min
May 12, 11:05 PM CDTSevere Thunderstorm WarningHGXHarris, Waller40 min

Nearby

Severe Thunderstorm Warnings in Texas, 2000Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.