Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 10, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Feb 28, 2001, 5:43 AM CST for Liberty County, Texas. It was in force for 62 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
- Feb 28, 2001, 5:43 AM CST (11:43 UTC)
- Expired
- Feb 28, 2001, 6:45 AM CST
- In force
- 62 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Liberty County, TX
The radar
The Houston radar (KHGX), 80 km from the middle of the area, began a volume at 11:42 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 |
|---|---|---|---|
| Feb 28, 6:00 AM CST | Thunderstorm Wind | Raywood, TX | Trees down between Raywood and Devers along US 90. |
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, 11.7 hours before the alert went out and 155 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
- 1318 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 723 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.8
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 Feb 28, 3:00 AM CST, 2 hours 43 minutes earlier.
Area forecast discussion, Feb 28, 3:00 AM CST, 2 hours 43 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 300 AM CST WED FEB 28 2001 COLD FRONT NEAR HUNTSVILLE...SHOULD APPROACH IAH NEAR 11Z AND NEAR COAST AROUND 13Z OR SO. 15-20 MILE WIDE BAND OF SHRA/TSRA ALONG FRONT W/WIDLY SCATTERED CONVECTION ELSEWHERE CWFA. UPPER 60S DEWPOINTS OVER COASTAL ZONES AND 60S ELSEWHERE AHEAD OF FRONT. 850 MB ANALYSIS INDICATE WIDE AREA OF 10-12 DEG F DEWPOINTS (MUCH OF LONE STAR STATE). WEAK UPPER LEVEL DIVERGENCE EVIDENT E TX BUT MID LEVEL LAPSE RATES NOT STRONG. LLVL JET NOT THAT STRONG EITHER. HENCE...DO NOT EXPECT SEVERE WEATHER FROM THIS FRONT AS IT MOVES ACROSS CWFA THIS MORNING. CONVECTION WILL BECOME MORE FOCUSED ONCE IT REACH COASTAL WATERS TODAY. APPROACHING COLD FRONT AND PRE-FRONTAL TROUGH WILL MAKE WIND DIRECTION FORECAST ACROSS COASTAL WATERS QUITE A CHALLENGE TODAY. TEMPERATURE CONTRAST ABOUT 30 DEG F DIFFERENCE BETWEEN FTW AND HGX. DITTO DEWPOINTS. MAX TEMPS TODAY OBVIOUSLY WILL BE IN THE MORNING W/READINGS LOWERING THE REST OF THE DAY. MOIST AIR MASS ON TOP OF INVERSION WILL REMAIN UNSTABLE W/SW FLOW. INSTABILITY WILL INCREASE ALONG W/PW VALUES LATE THURSDAY TO FRIDAY AND SFC COASTAL TROUGH/LOW WILL ENHANCE LLVL CONVERGENCE. POSSIBLE HEAVY PCPN DURING THIS PERIOD. AVN HINTS AT DRY MID/UPPER LEVEL SLOT PUNCHING THROUGH SATURDAY LOWERING PW VALUES TO UNDER AN INCH BY MID DAY (WE SHALL SEE). HOWEVER...WRAP-AROUND MOISTURE FROM UPPER LOW PROBABLY WILL GIVE REGION CHC PRECIP DURING THE WEEKEND. .KHGX...NONE. 37/42/39 PRELIMS... CLL TR 056/044 050/046 056 755 IAH TR 068/050 055/049 060 755 GLS TR 066/054 060/056 064 765 V
In the hours before
Special weather statement, Feb 28, 4:15 AM CST, 1 hour 28 minutes before
TXZ163-164-176>179-195>200-210>214-226-227-235>238-282200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 415 AM CST WED FEB 28 2001 ...HEAVY RAIN EVENT POSSIBLE FOR SOUTHEAST TEXAS LATE THURSDAY THROUGH SATURDAY... A COLD FRONT WILL MOVE ACROSS SOUTHEAST TEXAS THIS MORNING AND SLOW DOWN NEAR THE COAST. THE FRONT IS EXPECTED TO SLOWLY MOVE TO THE COASTAL WATERS BY THURSDAY. MEANWHILE...OVERRUNNING MOIST GULF AIR WILL CONTINUE TO GIVE OUR REGION A CHANCE RAIN THE NEXT SEVERAL DAYS. AN APPROACHING UPPER LEVEL DISTURBANCE WILL INCREASE RAIN CHANCES LATE THURSDAY THROUGH SATURDAY. THE SOIL SOAKED BY PREVIOUS RAINS WILL CAUSE HEAVY RAINFALL TO READILY RUNOFF INTO LOW LYING AREAS. THIS MAY PRODUCE FLOODING NEAR RIVERS...STREAMS AND OTHER LOW LYING AREAS. ALTHOUGH EXACT AMOUNTS ARE DIFFICULT TO DETERMINE AT THIS TIME... RAINFALL TOTALS THROUGH SATURDAY WILL PROBABLY BE 1 TO 3 INCHES WITH HIGHER LOCALIZED AMOUNTS. LATER UPDATES TO THIS STATEMENT WILL PROVIDE MORE DETAILS AS THIS WEATHER SITUATION EVOLVES. RESIDENTS OF SOUTHEAST TEXAS SHOULD KEEP ABREAST OF THIS SITUATION BY LISTENING TO NOAA WEATHER RADIO OR OTHER MEDIA SOURCES. STAY TUNED TO NOAA WEATHER RADIO OR OTHER NEWS SOURCES FOR THE LATEST FORECAST...STATEMENTS...AND POSSIBLE WARNINGS.
Special weather statement, Feb 28, 4:53 AM CST, 50 minutes before
TXZ163-164-176>179-195>200-210>214-226-227-235>238-282200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 415 AM CST WED FEB 28 2001 ...HEAVY RAIN EVENT POSSIBLE FOR SOUTHEAST TEXAS LATE THURSDAY THROUGH SATURDAY... A COLD FRONT WILL MOVE ACROSS SOUTHEAST TEXAS THIS MORNING AND SLOW DOWN NEAR THE COAST. THE FRONT IS EXPECTED TO SLOWLY MOVE TO THE COASTAL WATERS BY THURSDAY. MEANWHILE...OVERRUNNING MOIST GULF AIR WILL CONTINUE TO GIVE OUR REGION A CHANCE RAIN THE NEXT SEVERAL DAYS. AN APPROACHING UPPER LEVEL DISTURBANCE WILL INCREASE RAIN CHANCES LATE THURSDAY THROUGH SATURDAY. THE SOIL SOAKED BY PREVIOUS RAINS WILL CAUSE HEAVY RAINFALL TO READILY RUNOFF INTO LOW LYING AREAS. THIS MAY PRODUCE FLOODING NEAR RIVERS...STREAMS AND OTHER LOW LYING AREAS. ALTHOUGH EXACT AMOUNTS ARE DIFFICULT TO DETERMINE AT THIS TIME... RAINFALL TOTALS THROUGH SATURDAY WILL PROBABLY BE 1 TO 3 INCHES WITH HIGHER LOCALIZED AMOUNTS. LATER UPDATES TO THIS STATEMENT WILL PROVIDE MORE DETAILS AS THIS WEATHER SITUATION EVOLVES. RESIDENTS OF SOUTHEAST TEXAS SHOULD KEEP ABREAST OF THIS SITUATION BY LISTENING TO NOAA WEATHER RADIO OR OTHER MEDIA SOURCES. STAY TUNED TO NOAA WEATHER RADIO OR OTHER NEWS SOURCES FOR THE LATEST FORECAST...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 |
|---|---|---|---|---|
| Feb 28, 6:04 AM CST | Tornado Warning | HGX | Liberty | 41 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.