Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 151, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Oct 13, 2001, 2:27 AM CDT for Harris County, Texas. It was in force for 63 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
- Oct 13, 2001, 2:27 AM CDT (07:27 UTC)
- Expired
- Oct 13, 2001, 3:30 AM CDT
- In force
- 63 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Harris County, TX
The radar
The Houston radar (KHGX), 70 km from the middle of the area, began a volume at 07:31 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 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, 7.5 hours before the alert went out and 237 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.
220
WUUS54 KHGX 130732
SVRHOU
TXC201-130830-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
227 AM CDT SAT OCT 13 2001
THE NATIONAL WEATHER SERVICE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
HARRIS COUNTY IN SOUTHEAST TEXAS
* UNTIL 330 AM CDT
* AT 227 AM CDT...DOPPLER RADAR INDICATED A SQUALL LINE FROM CONROE
TO HOCKLEY TO PATTISON...MOVING EAST SOUTHEAST AT 15 TO 20 MPH. THIS
LINE OF STORMS WILL COLLIDE WITH OTHER THUNDERSTORMS MOVING INTO THE
REGION FROM THE GULF. EXPECT WIND GUSTS IN EXCESS OF 60 MPH. THIS
SQUALL LINE HAS BEEN RESPONSIBLE FOR KNOCKING TREES AND POWERLINES
DOWN ACROSS SOUTHEAST TEXAS FOR THE PAST 2 HOURS.
* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORMS INCLUDE...
PATTISON
BROOKSHIRE
HUMBLE...ALDINE...HEDWIG VILLAGE...SPRING VALLEY
HOUSTON METRO AREA
STRONG WINDS MAY KNOCK DOWN TREES AND POWER LINES OR DAMAGE
BUILDINGS. TAKE COVER NOW
A TORNADO WATCH IS ALSO IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES WITH LITTLE OR NO WARNING.
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 3010 9569 2986 9610 2975 9602 2982 9583
2967 9553 2957 9516 3008 9510 3001 9531What 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, 5 hours 12 minutes earlier.
Area forecast discussion, Oct 12, 9:15 PM CDT, 5 hours 12 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, 5 hours 19 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 57 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 7 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, 2:34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.