Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 91, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Aug 31, 1997, 6:11 PM CDT for Saint Martin Parish, Louisiana. It was in force for 49 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
- Aug 31, 1997, 6:11 PM CDT (23:11 UTC)
- Expired
- Aug 31, 1997, 7:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Saint Martin Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 31, 6:25 PM CDT | Hail 0.75 | St Martinville, LA |
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 12:00Z, 11.2 hours before the alert went out and 153 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
- 2191 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 834 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KLCH 312315 RRA
SVRLCH
LAC099-010000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
611 PM CDT SUN AUG 31 1997
THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
IN SOUTH CENTRAL LOUISIANA
LOWER ST. MARTIN PARISH
AT 610 PM CDT...NEXRAD DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
LOCATED 5 MILES NORTH OF STEPHENSVILLE MOVING SOUTHWEST AT 10 MPH.
WIND GUSTS IN EXCESS OF 55 MPH AND ONE INCH HAIL CAN BE EXPECTED
WITH THIS STORM.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.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 Aug 31, 2:29 PM CDT, 3 hours 42 minutes earlier.
Area forecast discussion, Aug 31, 2:29 PM CDT, 3 hours 42 minutes before
SOUTHEAST TEXAS..SOUTHWEST AND CENTRAL LOUISIANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 220 PM CDT SUN AUG 31 1997 5H RIDGE OVER WESTERN TX WILL RETROGRADE SOME DURING THIS FCST PD AS S/W ROTATES AROUND THE RIDGE AND ACROSS THE FA DURING THE DAY ON MONDAY. AMS WILL CONTINUE TO BE MODERATELY UNSTABLE WITH LI VALUES AROUND -5 AND K INDICIES RIGHT AROUND 30. P.W. VALUES WILL CONTINUE TO BE SLIGHTLY ABOVE NORMAL WITH VALUES AROUND 1.8". WILL GO FOR CHC POPS ACROSS LA ON MONDAY AND IN THE SLIGHT CHC CAT ACROSS SE TX AS VVEL REMAIN HIGHER ACROSS LA. WL ALSO HAVE TO SEE IF SFC CONVERGENCE ZONE CURRENTLY OVER CENTRAL LA THIS AFTERNOON MOVES ANY MORE TO SOUTH OVER TIME. WILL ZKNOCK POPS BACK DOWN TO SLIGHT CHC CAT OVER LA ON TUESDAY AS S/W PASSES AND NVA PREVAILS. 10 LCH 74/93/74/93 1322 AEX 71/93/71/94 2322 LFT 74/93/74/94 1322 BPT 75/94/74/93 1222
Nearby
Severe Thunderstorm Warnings in Louisiana, 1997Every severe thunderstorm warning in 1997
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.