Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 33, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 27, 2001, 8:35 PM CST for Wharton County, Texas. It was in force for 40 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
- Mar 27, 2001, 8:35 PM CST (02:35 UTC)
- Expired
- Mar 27, 2001, 9:15 PM CST
- In force
- 40 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Wharton County, TX
The radar
The Houston radar (KHGX), 128 km from the middle of the area, began a volume at 02:23 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 |
|---|---|---|---|
| Mar 27, 8:40 PM CST | Hail 0.75 | El Campo, TX |
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
Corpus Christi, TX (KCRP), launched 00:00Z, 2.6 hours before the alert went out and 189 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
- 579 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 595 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 277 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KHGX 280236 SVRHOU TXC481-280315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 835 PM CST TUE MAR 27 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WHARTON COUNTY IN SOUTHEAST TEXAS * UNTIL 915 PM CST * AT 836 PM CST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 11 MILES SOUTHWEST OF EL CAMPO...MOVING NORTHEAST AT 20 MPH. THE PRIMARY THREAT FROM THIS STORM WILL BE 3/4 TO 1 INCH SIZED HAIL. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... EL CAMPO PIERCE 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 2920 9652 2906 9633 2919 9616 2934 9628
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 Mar 27, 2:55 PM CST, 5 hours 40 minutes earlier.
Area forecast discussion, Mar 27, 2:55 PM CST, 5 hours 40 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
255 PM CST TUE MAR 27 2001
WIDESPREAD ELEVATED CONVECTION OVER NORTHERN TWO THIRDS OF CWFA
W/ISOLATED STRONGER CELLS OVER WESTERN ZONES. NEW AREA OF CONVECTION
INCREASING EXTREME SW PORTION OF CWFA. TEMPERATURES LOWERING DUE
TO EVAPORATIONAL COOLING FROM PRECIPITATION. MODELS ACTUALLY IN
CLOSE AGREEMENT NEXT 24 HOURS BRINGING BRUNT OF HEAVIER PRECIP OVER
NORTHERN AND CENTRAL ZONES (ALONG AND N OF I-10). UPPER TROUGH WILL
TAKE EARLY THU MORNING. MEANWHILE...SPOKES OF ENERGY WILL CONTINUE
TO GIVE OUR AREA CHANCE OF SHRA/TSRA. COASTAL TROUGH/FRONT AND
DEVELOPING WEAK SURFACE LOW ALONG TROUGH WILL FOCUS HEAVIER PRECIP
OVER COASTAL AND ADJACENT ZONES ON WEDNESDAY. ETA BEING SURFACE LOW
SOMEWHAT FARTHER OFFSHORE WHILE AVN MOVES IT SLOWER ALONG COASTLINE.
SURFACE LOW SHOULD BE E OF REGION LATE WED NIGHT/EARLY THURSDAY.
WILL COMPROMISE ON MODEL SOLUTIONS. WILL MENTION LOCALLY HEAVY
RAINFALL IN FORECAST PACKAGE. SPSHOU ALREADY OUT MENTIONING 1-3
INCHES LOCALLY THROUGH EVENT LASTING THROUGH WEDNESDAY. WILL MENTION
OF SLIGHT CHC PRECIP THURSDAY AS AREA REMAINS UNDER BROAD
LONG WAVE TROUGH. WILL ADD MENTION PRECIP TO OUTLOOK (LATE SATURDAY
-EARLY SUNDAY PERIOD) AS COLD FRONT AND UPPER LEVEL IMPULSE MOVES
THROUGH REGION. PRESSURE GRADIENT WILL REMAIN TIGHT ACROSS MARINE
WATERS...WILL CONTINUE SCA COASTAL WATERS AND SCEC BAYS.
.HGX...SCA 0-60 NM COASTAL WATERS FROM MATAGORDA SHIP CHANNEL
TO HIGH ISLAND. SCEC BAYS.
37/46
CLL TE 046/058 047/067 051 +96
IAH TE 049/061 050/069 052 +98
GLS TE 055/065 059/069 060 ++8In the hours before
Special weather statement, Mar 27, 3:40 PM CST, 4 hours 55 minutes before
TXZ163-164-176>179-195>200-210>213-281200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 340 PM CST TUE MAR 27 2001 ...AREAS OF HEAVY RAIN EXPECTED INTO WEDNESDAY... PERIODS OF MODERATE TO HEAVY RAIN ARE EXPECTED OVER SOUTHEAST TEXAS INTO WEDNESDAY. 1 TO 2 INCHES OF ADDITIONAL RAINFALL CAN BE EXPECTED. BE ALERT FOR HIGH STANDING WATER IN AREAS OF POOR DRAINAGE. WHEN DRIVING...SLOW DOWN AND AVOID SUDDEN SWERVES TO KEEP FROM HYDROPLANING. WHILE SIGNIFICANT FLASH FLOODING IS NOT EXPECTED...SOME AREA WATERWAYS COULD REACH BANKFULL LEVELS. SOIL MOISTURE LEVELS ARE HIGH DUE TO OUR RECENT ABUNDANT RAINFALL. THIS LEADS TO INCREASED RUNOFF INTO AREA STREAMS AND CREEKS...CAUSING THEM TO RISE MORE RAPIDLY. SINCE THE FREEZING LEVEL IN THE ATMOSPHERE IS RATHER LOW...A FEW OF THE THUNDERSTORMS COULD ALSO PRODUCE HAIL. AN UPPER LEVEL DISTURBANCE WILL CROSS THE AREA WEDNESDAY AND WEDNESDAY NIGHT. THE THREAT OF HEAVY RAIN WILL END AS IT MOVES EAST OF THE REGION. STAY TUNED TO LOCAL MEDIA AND NOAA WEATHER RADIO FOR THE LATEST WEATHER AND HYDROLOGIC FORECASTS AND STATEMENTS. END/46
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 12:55 AM CST | Flash Flood Warning | HGX | Chambers, Harris | 3 hr |
| Mar 28, 4:01 AM CST | Flash Flood Warning | HGX | Chambers, Fort Bend, Harris | 4 hr |
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.