Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 154, NWS Houston/Galveston, TX

October 13, 2001Chambers County, Liberty County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Oct 13, 2001, 4:16 AM CDT for Chambers County, Liberty County, Texas. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Oct 13, 2001, 4:16 AM CDT (09:16 UTC)
Expired: Oct 13, 2001, 5:00 AM CDT
In force: 44 min
Issued by: NWS Houston/Galveston, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Chambers County, TX, Liberty County, TX

The radar

The Houston radar (KHGX), 60 km from the middle of the area, began a volume at 09:12 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.

What was reported inside it

Time	Report	Where	Remark
Oct 13, 4:20 AM CDT	Thunderstorm Wind	Countywide, TX	Sheriff's office reported trees and power lines down across county.

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.

Issued	Product	Office	Lasted
Oct 13, 12:30 AM CDT	Tornado Watch	SPC	5 hr
Oct 13, 4:00 AM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.3 hours before the alert went out and 150 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2537 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 640 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 6.4

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 Oct 13, 2:45 AM CDT, 1 hour 31 minutes earlier.

Area forecast discussion, Oct 13, 2:45 AM CDT, 1 hour 31 minutes before

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
245 AM CDT SAT OCT 13 2001

SVR WX CURRENTLY ONGOING OVR THE CWA. WILL CLEAR THE NW ZONES FROM
TOR AND FFA WITH UPDATE. FNT CURRENTLY CUTTING A LN OVR THE NW QUAD
OF THE CWA. ITS E OF CLL AND BRENHAM. ETA HAS THE BOUNDARY CLRG THE
CWA BY NOONTIME. SHRA CONTS A BIT BEHIND FNT...SO WILL HAVE CAT POPS
EVERYWHERE FIRST PERIOD. WILL INDC SOME CLRG WRN ZONES THIS AFTN.
MODELS SHOW A DECR OF SHEAR AND CAPES NEXT 6-12 HRS. EVENT MAY END
UP WINDING DOWN TO A HVY PRECIP TYPE SITU.

REST OF FCST LEFT AS IS. LOOKS TRANQUIL FOR THE REST OF THE WEEK.
MOS TEMPS HAVE JUMPED FROM PREV RUNS FOR SUNDAY. GIVEN THICKNESSES
...THINK THEY ARE TOO HIGH.

.HGX...FFA ALL SE HALF THIS MORNING.
       SCA BAYS AND 0-60NM GULF WATERS.

46/35/47/42/DB

PRELIMS...
CLL WU 073/050 080/050 081 800
IAH TU 078/050 081/050 082 +00
GLS TU 080/060 078/064 080 +00

In the hours before

Special weather statement, Oct 13, 12:20 AM CDT, 3 hours 56 minutes before

TXZ163-164-176>179-195>200-210>214-226-227-238-131408-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1220 AM CDT SAT OCT 13 2001

THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS
OF EASTERN TEXAS AND THE COASTAL WATERS UNTIL 500 AM CDT SATURDAY.

THIS INCLUDES BRAZORIA...CHAMBERS...COLORADO...FORT BEND...GALVESTON
GRIMES...HARRIS...HOUSTON...LIBERTY...MADISON...MONTGOMERY...POLK
SAN JACINTO...WALKER...WALLER...WASHINGTON...AND WHARTON COUNTIES OF
SOUTHEAST TEXAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST
OF A LINE FROM 45 MILES SOUTHWEST OF HOUSTON TEXAS TO 65 MILES
NORTHEAST OF LUFKIN TEXAS.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER WEATHER NEWS SOURCES FOR
THE LATEST UPDATES ON THIS SEVERE WEATHER SITUATION.

Special weather statement, Oct 13, 4:10 AM CDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 12, 7:53 PM CDT	Severe Thunderstorm Warning	HGX	Polk, San Jacinto	52 min
Oct 13, 12:18 AM CDT	Severe Thunderstorm Warning	HGX	Burleson	57 min
Oct 13, 12:36 AM CDT	Severe Thunderstorm Warning	HGX	Brazos, Washington	54 min
Oct 13, 1:04 AM CDT	Severe Thunderstorm Warning	HGX	Grimes, Madison	56 min
Oct 13, 1:13 AM CDT	Severe Thunderstorm Warning	HGX	Austin	62 min
Oct 13, 1:23 AM CDT	Severe Thunderstorm Warning	HGX	Harris, Waller	67 min
Oct 13, 1:50 AM CDT	Severe Thunderstorm Warning	HGX	Montgomery, Walker	55 min
Oct 13, 1:55 AM CDT	Severe Thunderstorm Warning	HGX	Houston	50 min
Oct 13, 2:02 AM CDT	Tornado Warning	HGX	Houston	43 min
Oct 13, 2:12 AM CDT	Severe Thunderstorm Warning	HGX	Polk, San Jacinto, Trinity	63 min
Oct 13, 2:20 AM CDT	Severe Thunderstorm Warning	HGX	Austin	25 min
Oct 13, 2:27 AM CDT	Severe Thunderstorm Warning	HGX	Harris	63 min
Oct 13, 2:34 AM CDT	Tornado Warning	HGX	Polk	41 min
Oct 13, 2:47 AM CDT	Severe Thunderstorm Warning	HGX	Montgomery	43 min
Oct 13, 2:58 AM CDT	Tornado Warning	HGX	Trinity	47 min
Oct 13, 3:14 AM CDT	Severe Thunderstorm Warning	HGX	Polk	61 min
Oct 13, 3:24 AM CDT	Tornado Warning	HGX	Liberty	51 min
Oct 13, 4:02 AM CDT	Special Marine Warning	HGX		88 min
Oct 13, 5:20 AM CDT	Special Marine Warning	HGX		115 min
Oct 13, 5:20 AM CDT	Special Marine Warning	HGX		115 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.