Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 3, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jan 29, 2001, 3:38 AM CST for Polk County, San Jacinto County, Texas. It was in force for 52 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
- Jan 29, 2001, 3:38 AM CST (09:38 UTC)
- Expired
- Jan 29, 2001, 4:30 AM CST
- In force
- 52 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Polk County, TX, San Jacinto County, TX
The radar
The Houston radar (KHGX), 139 km from the middle of the area, began a volume at 09:37 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 |
|---|---|---|---|
| Jan 29, 4:00 AM CST | Thunderstorm Wind | Segno, TX | Trees down at FM 1276 and FM 943 near Big Sandy. |
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 nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.6 hours before the alert went out and 177 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
- 1124 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 526 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS54 KHGX 290938
SVRHOU
TXC373-407-291030-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
338 AM CST MON JAN 29 2001
THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SAN JACINTO COUNTY IN SOUTHEAST TEXAS
POLK COUNTY IN SOUTHEAST TEXAS
* UNTIL 430 AM CST
* AT 338 AM CST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM ALONG
A LINE EXTENDING FROM 6 MILES NORTHWEST OF CORRIGAN TO 15 MILES
SOUTHWEST OF COLDSPRING...MOVING EAST AT 20 MPH. INDIVIDUAL CELLS
WITHIN THE LINE ARE MOVING NORTHEAST AT 40 MPH. EXPECT WIND GUSTS
IN EXCESS OF 60 MPH AS THE LINE PASSES THROUGH.
* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORMS INCLUDE...
COLDSPRING
LAKE LIVINGSTON DAM
CORRIGAN
LIVINGSTON...SEVEN OAKS...LEGGETT...MOSCOW
GOODRICH...SHEPHERD
ALABAMA-COUSHATTA RESERVATION
CAMILLA...SHEPHERD
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 3105 9492 3041 9525 3036 9520 3050 9486
3052 9457 3108 9469What 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 Jan 29, 2:56 AM CST, 42 minutes earlier.
Area forecast discussion, Jan 29, 2:56 AM CST, 42 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
256 AM CST MON JAN 29 2001
QUITE A DRAMATIC DROP IN TEMPERATURES BEHIND THE COLD FRONT THAT IS
NOW MOVING THROUGH OUR WESTERN ZONES (COLLEGE STATION WENT FROM 67
DEGREES AT 07Z TO 45 DEGREES AT 08Z). SHOWERS AND THUNDERSTORMS
CONTINUE TO INCREASE IN COVERAGE ACROSS ALL OF OUR COUNTY WARNING
AREA AND CONTINUE TO INCREASE IN INTENSITY ALONG A LINE APPROACHING
OUR CENTRAL ZONES. THIS BOUNDARY ALONG AND AHEAD OF THE COLD FRONT
IS LIKELY THE FORMING SQUALL LINE. WITH A 50 KNOT LOW LEVEL JET OFF
THE VWP AND STRENGTHENING UPPER LEVEL WINDS APPROACHING FROM THE
WEST PER WATER VAPOR SATELLITE LOOP...WE STILL HAVE THE RISK OF THIS
LINE OF STORMS BECOMING SEVERE WITH STRONG DAMAGING WINDS THE
PRIMARY THREAT. IN ADDITION...VELOCITY DATA IS CURRENTLY SHOWING
INCREASING LOW LEVEL ROTATION ALONG THE DEVELOPING LINE. SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM CST. WELL LIKELY
BE ABLE TO REMOVE OUR WESTERN COUNTIES FROM THE WATCH BOX BY THE
TIME THE ZONES COME OUT...BUT SOME OF OUR EASTERN COUNTIES MAY BE
PLACED IN A NEW WATCH BOX AFTER 5 AM. EXPECT RAPID CLEARING BY MID
MORNING TO NOON AND SUNNY SKIES AREAWIDE THIS AFTERNOON. COLD
AIRMASS BEHIND THE FRONT WILL BATTLE WITH WARM WEST WINDS AND
ABUNDANT SUNSHINE THIS AFTERNOON. DUE TO COLDER THAN ANTICIPATED
TEMPERATURES BEHIND THE FRONT...WILL UNDERCUT GUIDANCE HIGH TEMPS
TODAY BY SEVERAL DEGREES. MORE SEASONAL TEMPERATURES WILL PREVAIL
THROUGH THE REST OF THE WEEK. MODELS TRY TO BRING SOME RAIN TO THE
COASTAL COUNTIES ON WEDNESDAY IN RESPONSE TO SURFACE LOW FORMATION
ALONG THE LOWER TEXAS COAST. WILL HOLD OFF ON BRINGING RAIN BACK
INTO THE FORECAST FOR NOW AND WAIT FOR A FEW MORE MODEL RUNS. WILL
ALSO HOLD OFF ON POSSIBLE RAINS THIS WEEKEND DUE TO THE NORMAL
UNCERTAINTY OF THE SPEED AND MOVEMENT OF AN UPPER LOW COMING OUT OF
MEXICO. CONFIDENCE IN THE EXTENDED FORECAST IS ON THE LOW SIDE AT
THIS TIME.
.KHGX...SEVERE THUNDERSTORM WATCH THRU 5 AM PORTIONS OF SE TX.
SMALL CRAFT ADVISORY ALL WATERS TODAY.
42/47/DH/35/48
PRELIMS...
CLL UU 060/040 068/040 058 400
IAH TU 063/042 068/042 060 +00
GLS TU 063/050 065/049 060 +00In the hours before
Special weather statement, Jan 29, 12:12 AM CST, 3 hours 26 minutes before
TXZ163-164-176>179-195>199-210>213-226-227-291100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1212 AM CST MON JAN 29 2001 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR A PORTION OF SOUTHEAST TEXAS UNTIL 5 AM. SOUTHEAST TEXAS COUNTIES IN THE WATCH AREA INCLUDE... AUSTIN...BRAZOS...BURLESON...COLORADO...FORT BEND....GRIMES... HARRIS...HOUSTON...MADISON...MONTGOMERY...POLK...SAN JACINTO... TRINITY...WALKER...WALLER...WASHINGTON...WHARTON. CENTRAL TEXAS COUNTIES IN THE WATCH AREA INCLUDE... LEON...MILAM...ROBERTSON. CITIES IN THE WATCH AREA INCLUDE... CALDWELL...BRYAN/COLLEGE STATION...MADISONVILLE...CROCKETT... BRENHAM...NAVASOTA...HUNTSVILLE...GROVETON...COLUMBUS...SEALY... HEMPSTEAD...CONROE...COLDSPRING...LIVINGSTON...WHARTON... RICHMOND/ROSENBERG...METRO HOUSTON. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS. LISTEN TO NOAA WEATHER RADIO OR OTHER NEWS SOURCES FOR THE LATEST STATEMENTS AND POSSIBLE WARNINGS.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 29, 2:56 AM CST | Severe Thunderstorm Warning | HGX | Montgomery | 64 min |
| Jan 29, 3:35 AM CST | Severe Thunderstorm Warning | HGX | Harris | 40 min |
| Jan 29, 3:57 AM CST | Severe Thunderstorm Warning | HGX | Liberty, Montgomery | 48 min |
| Jan 29, 5:01 AM CST | Severe Thunderstorm Warning | HGX | Liberty | 44 min |
| Jan 29, 5:23 AM CST | Severe Thunderstorm Warning | HGX | Galveston | 52 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.