Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 34, NWS Houston/Galveston, TX

April 15, 2001Brazos County, Grimes County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 15, 2001, 7:19 PM CDT for Brazos County, Grimes County, Texas. It was in force for 26 min. No storm report in the archive falls 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.

The facts

Issued
Apr 15, 2001, 7:19 PM CDT (00:19 UTC)
Expired
Apr 15, 2001, 7:45 PM CDT
In force
26 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Brazos County, TX, Grimes County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.3 hours before the alert went out and 264 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, Fort Worth, TX at 00:00Z on 2001-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 2001-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2538 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
151 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.

000 
WUUS54 KHGX 160020
SVRHOU
TXC041-185-160045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
719 PM CDT SUN APR 15 2001

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

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

* UNTIL 745 PM CDT

* AT 713 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5
  MILES NORTH OF IOLA...MOVING SOUTHEAST AT 10 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  IOLA
  BEDIAS
  ROANS PRAIRIE

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

THIS STORM MAY PRODUCE LARGE DAMAGING HAIL...RESULTING IN EXTENSIVE
PROPERTY DAMAGE OR SERIOUS INJURY. AVOID WINDOWS AND 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 3085 9606 3081 9630 3045 9621 3051 9600
          3057 9584 3086 9589

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 Apr 15, 2:00 PM CDT, 5 hours 19 minutes earlier.

Area forecast discussion, Apr 15, 2:00 PM CDT, 5 hours 19 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
200 PM CDT SUN APR 15 2001

FRONTAL BOUNDARY JUST N OF CWA JUST MIGHT HAVE ENOUGH PUSH TO MAKE
IT NEAR THE COAST BY LATE TONIGHT. ITS THEN EXPECTED TO WASH OUT
WITH E & SE WINDS REDEVELOPING MONDAY. BIG STORY OF THE WEEK (AND
MAYBE MONTH) IS THE NEXT FRONT. STILL SOME TIMING DIFFERENCES
BETWEEN THE MODELS - WITH ETA BEING THE FASTEST - BUT IT LOOKS TO BE
PASSING THRU LATE MONDAY NIGHT AND OFF THE COAST EARLY TUESDAY AS A
1039 HIGH DROPS INTO THE PLAINS. MODELS ALL SHOWING SOME PRECIP
DEVELOPING ALONG THE FRONT WITH MOST SIGNIFICANT ACCUMULATIONS IN
CENTRAL TX. CLOUDS SHOULD STICK AROUND MOST OF THE DAY TUESDAY
LIMITING MUCH HEATING. APPEARS WE MIGHT ACTUALLY SEE BELOW NORMAL
TEMPS FOR THIS TIME OF MONTH BUT DONT GET USED TO IT. ONSHORE
WINDS RESUME WEDNESDAY NIGHT AND THURSDAY AS SURFACE HIGH SHIFTS TO
THE EAST.

EXTENDED: H5 RIDGE CENTERED OVER BAJA GRADUALLY FLATTENS ALLOWING NW
FLOW ALOFT TO BECOME ZONAL. OTHER THAN INCREASING HUMIDITIES AND A
GRADUAL WARM-UP...NO SIGNIFICANT WX-MAKERS SEEN ON THE HORIZON.

WILL CONTINUE TO WATCH TSTMS ALONG THE SABINE AND WILL MAKE A
DECISION ON 1ST PERIOD POPS NEAR PRESS TIME. TEMPS HEATING UP NICELY
& 88-D SHOWING SIGNS PRECIP IS STARTING TO BACKBUILD. LEANING TOWARD
MAV TEMPS.

47/34/DO

.HGX...NONE.

PRELIMS...
CLL BC 063/082 058/067 047 214
IAH BC 064/083 061/070 048 212
GLS BC 070/079 066/071 055 211

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 8:07 PM CDTSevere Thunderstorm WarningHGXGrimes, Montgomery38 min
Apr 15, 8:35 PM CDTSevere Thunderstorm WarningHGXBurleson, Washington55 min
Apr 15, 8:47 PM CDTSevere Thunderstorm WarningHGXMontgomery43 min
Apr 15, 9:24 PM CDTSevere Thunderstorm WarningHGXHarris36 min
Apr 15, 9:29 PM CDTSevere Thunderstorm WarningHGXAustin, Washington46 min
Apr 16, 1:55 PM CDTSevere Thunderstorm WarningHGXChambers50 min
Apr 16, 2:45 PM CDTSevere Thunderstorm WarningHGXChambers60 min
Apr 16, 2:51 PM CDTSevere Thunderstorm WarningHGXHarris54 min
Apr 16, 3:33 PM CDTSevere Thunderstorm WarningHGXGrimes, Washington27 min
Apr 16, 3:39 PM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Harris51 min
Apr 16, 3:49 PM CDTSevere Thunderstorm WarningHGXWaller56 min
Apr 16, 3:49 PM CDTTornado WarningHGXBrazoria, Fort Bend26 min
Apr 16, 4:00 PM CDTSevere Thunderstorm WarningHGXGrimes, Washington30 min
Apr 16, 4:31 PM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend44 min
Apr 16, 4:42 PM CDTSevere Thunderstorm WarningHGXHarris, Waller63 min
Apr 16, 5:15 PM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend60 min
Apr 16, 6:57 PM CDTSevere Thunderstorm WarningHGXPolk33 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001

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.