Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 147, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Oct 13, 2001, 1:50 AM CDT for Montgomery County, Walker County, Texas. It was in force for 55 min. 4 reports 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, 1:50 AM CDT (06:50 UTC)
- Expired
- Oct 13, 2001, 2:45 AM CDT
- In force
- 55 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Montgomery County, TX, Walker County, TX
The radar
The Houston radar (KHGX), 125 km from the middle of the area, began a volume at 06:51 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, 2:30 AM CDT | Thunderstorm Wind | Huntsville, TX | Sheriff's office reported trees and power lines down. |
| Oct 13, 2:30 AM CDT | Thunderstorm Wind | Huntsville, TX | Newspaper reported wind damage to a mobile home. |
| Oct 13, 2:30 AM CDT | Thunderstorm Wind | Riverside, TX | Newspaper reported wind damage to a mobile home. |
| Oct 13, 2:45 AM CDT | Thunderstorm Wind | Conroe, TX | Sheriff's office reported trees 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 13, 12:30 AM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.8 hours before the alert went out and 229 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.
- 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
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 12, 9:15 PM CDT, 4 hours 35 minutes earlier.
Area forecast discussion, Oct 12, 9:15 PM CDT, 4 hours 35 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
915 PM CDT FRI OCT 12 2001
WILL UPDATE ZONES TO REFLECT TORNADO WATCH NUMBER 781 AFFECTING
BRAZOS...BURLESON AND WASHINGTON COUNTIES. NO CHANGE TO REST OF
PACKAGE.
.HGX...TORNADO WATCH TIL 08Z FOR BRAZOS...BURLESON AND WASHINGTON
COUNTIES.
FFA ALL ZONES TONIGHT.
SCA BAYS AND 0-60NM GULF WATERS.
37/40/TF
CLL EU 064/070 050/077 055 +40
IAH TU 072/075 052/076 054 +60
GLS TU 076/076 062/074 065 880In the hours before
Local storm report, Oct 12, 9:08 PM CDT, 4 hours 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
908 PM CDT FRI OCT 12 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0750 PM 4 W LIVINGSTON TX WIND DAMAGE
10/12/01 POLK TREES DOWN ON HIGHWAY
350. REPORTED BY LAW
ENFORCEMENT OFFICIAL.Special weather statement, Oct 12, 9:30 PM CDT, 4 hours 20 minutes before
TXZ195>197-130800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 930 PM CDT FRI OCT 12 2001 ...TORNADO WATCH IN EFFECT UNTIL 300 AM FOR BRAZOS...BURLESON...AND WASHINGTON COUNTIES... THUNDERSTORMS MOVING INTO SOUTH CENTRAL TEXAS ARE EXPECTED TO SPREAD EASTWARD AND SHOULD APPROACH BRAZOS...BURLESON...AND WASHINGTON COUNTIES AROUND MIDNIGHT. THE HIGHLY UNSTABLE AND VERY MOIST AIR MASS WILL BE CONDUCIVE FOR THE DEVELOPMENT OF SEVERE STORMS AND A FEW TORNADOES. 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, 12:20 AM CDT, 1 hour 30 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.
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, 1:55 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, 4:16 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 44 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, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.