Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 37, NWS Houston/Galveston, TX

April 15, 2001Montgomery County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 15, 2001, 8:47 PM CDT for Montgomery County, Texas. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 15, 2001, 8:47 PM CDT (01:47 UTC)
Expired
Apr 15, 2001, 9:30 PM CDT
In force
43 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Montgomery County, TX

The radar

The Houston radar (KHGX), 101 km from the middle of the area, began a volume at 01:48 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.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.8 hours before the alert went out and 328 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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 8:43 PM CDT, 4 minutes earlier.

Area forecast discussion, Apr 15, 8:43 PM CDT, 4 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
843 PM CDT SUN APR 15 2001

CURRENT CONCERNS ARE THE TWO SEVERE STORMS MOVING SOUTHEAST ACROSS THE
NORTHWESTERN HALF OF THE FORECAST AREA.  00Z SOUNDINGS SHOW A DRY
ADIABATIC LAPSE RATE FROM THE SURFACE TO 800 MB...WATER VAPOR
INDICATES JET STREAK OVERHEAD AND SE TX IN THE DRY SLOT.   WILL UPDATE
THE FORECAST TO INCLUDE THESE POSSIBILITIES.  EXPECTING THE STORMS TO
DIMINISH A BIT LATER THIS EVENING...AND WILL ISSUE ANOTHER UPDATE
LATER THIS EVENING.

PL-40
45

.HGX...NONE.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 7:19 PM CDTSevere Thunderstorm WarningHGXBrazos, Grimes26 min
Apr 15, 8:07 PM CDTSevere Thunderstorm WarningHGXGrimes, Montgomery38 min
Apr 15, 8:35 PM CDTSevere Thunderstorm WarningHGXBurleson, Washington55 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; radar from the NEXRAD Level II archive.