Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 152, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Oct 13, 2001, 2:47 AM CDT for Montgomery County, Texas. It was in force for 43 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
- Oct 13, 2001, 2:47 AM CDT (07:47 UTC)
- Expired
- Oct 13, 2001, 3:30 AM 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), 96 km from the middle of the area, began a volume at 07:51 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, 3:00 AM CDT | Thunderstorm Wind | Conroe, TX | Sheriff's office reported trees down on Highway 105 and FM 1485. |
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, 7.8 hours before the alert went out and 209 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
As transmitted, in the capitals the NWS used until 2016.
084 WUUS54 KHGX 130749 SVRHOU TXC339-130830- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 247 AM CDT SAT OCT 13 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN MONTGOMERY COUNTY IN SOUTHEAST TEXAS * UNTIL 330 AM CDT * AT 248 AM CDT...DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM NORTH OF CUT AND SHOOT TO WEST OF THE WOODLANDS MOVING EAST AT 20 MPH. SOME OF THE THUNDERSTORMS WITHIN THIS LINE ARE PRODUCING DAMAGING WINDS. HEAVY RAIN TO 2 INCHES AN HOUR IS ALSO OCCURRING. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... CUT AND SHOOT SPLENDORA WOODBRANCH PORTER MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS 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 3031 9549 3019 9535 3025 9514 3044 9536
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, 2 minutes earlier.
Area forecast discussion, Oct 13, 2:45 AM CDT, 2 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 +00In the hours before
Local storm report, Oct 12, 9:08 PM CDT, 5 hours 39 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, 5 hours 17 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, 2 hours 27 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, 1:50 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, 2:58 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.