Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 123, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Oct 11, 2001, 11:37 AM CDT for Hardin County, Jefferson County, Texas. It was in force for 53 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 11, 2001, 11:37 AM CDT (16:37 UTC)
- Expired
- Oct 11, 2001, 12:30 PM CDT
- In force
- 53 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Hardin County, TX, Jefferson County, TX
The radar
The Houston radar (KHGX), 105 km from the middle of the area, began a volume at 16:38 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 11, 12:30 PM CDT | Thunderstorm Wind | China, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 11, 8:00 AM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.6 hours before the alert went out and 110 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
- 1805 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 496 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 5.4
The text
As transmitted, in the capitals the NWS used until 2016.
349 WUUS54 KLCH 111637 SVRLCH TXC199-245-111730- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA 1137 AM CDT THU OCT 11 2001 THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HARDIN COUNTY IN SOUTHEAST TEXAS JEFFERSON COUNTY IN SOUTHEAST TEXAS * UNTIL 1230 PM CDT * AT 1135 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SOUR LAKE...MOVING EAST AT 20 MPH. * THIS STORM WILL BE NEAR... BEVIL OAKS AND CHINA BY 1150 AM CDT LUMBERTON BY 1205 PM CDT BEAUMONT BY 1210 PM CDT SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND TORRENTIAL RAIN. A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM CDT. REMEMBER... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. CALL 337-477-5285 TO REPORT SEVERE WEATHER TO THE WEATHER SERVICE. LAT...LON 3022 9449 3004 9447 3004 9411 3028 9413
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 Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 11, 9:36 AM CDT, 2 hours 1 minute earlier.
Area forecast discussion, Oct 11, 9:36 AM CDT, 2 hours 1 minute before
SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 936 AM CDT THU OCT 11 2001 .THIS AFTERNOON... SEVERE WEATHER MAY BE A PROBLEM TODAY. A TORNADO WATCH IS IN EFFECT FOR SOUTHEAST TEXAS UNTIL 1 PM CDT. .MORNING SOUNDING... A QUICK PERUSAL REVEALS AN UNSTABLE ENVIRONMENT. I MODIFIED THE SOUNDING USING THE FORECAST MAXIMUM TEMPERATURE OF 82 DEG F. LIFTING THE SURFACE PARCEL...THE ALGORITHM COMPUTES CAPES NEAR 3000 J PER KG...BOUNDED BELOW BY THE LFC (1.7 KFT) AND ABOVE BY EQUILIBRIUM LEVEL (48.5 KFT). MARGINAL HAIL THREAT...THE FREEZING LEVEL IS RATHER HIGH AT 14.0 KFT. THE PARCEL FREEZING LEVEL IS EVEN HIGHER AT 17.5 KFT. SUPERCOOLED LIQUID WATER WILL EXIST OVER A 3.5 KFT LAYER. ALSO...MINOR COLD AIR ADVECTION IS NOTED AT MID TROPOSPHERE (AROUND 700 MB). LOOKING AT PRECIPITABLE WATER (PW)...I COMPUTE ANOTHER STABILITY MEASURE. USING THE SOLOT METHOD...I COMPUTE PW FOR THE SURFACE-700 MB LAYER AT 1.4 INCHES. THE TOTAL PW IS 2.0 INCHES. THE PW DEFICIT IS 0.6 INCHES...MOST OF THE WATER (IN THE FORM OF VAPOR) IS IN THE LOWEST LAYERS. OTHER INDICES WORTH NOTING...THE K-INDEX IS 41 (SHOWERS AND THUNDERSTORMS). THE TOTAL-TOTALS IS 52 (FEW SEVERE STORMS). THE SWEAT INDEX IS 400 (A FEW TORNADIC STORMS POSSIBLE). FINAL NOTE...THE ALGORITHM COMPUTES STORM MOTION AT 240 DEG AT 15 KT. THIS IS THE SHEAR WISE MOTION. SEVERE WEATHER WILL LIKELY FOLLOW CROSS SHEAR MOTION. THE MOTION OF THE SLOWER RIGHT MOVER IS 150 DEG ...WHILE THE MOTION OF THE FASTER LEFT MOVER IS 330 DEG. .PREVAILING NUMBERS... AEX 78/69/80/64/69/45 875830 BPT 81/72/82/67/70/51 764830 LCH 82/72/82/68/70/50 765840 LFT 80/72/82/69/70/50 776750 .LCH...NONE. TRARES
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 10:22 AM CDT | Tornado Warning | LCH | Hardin | 53 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.