Alert archive / Louisiana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 28, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Jun 20, 2002, 6:21 PM CDT for Acadia Parish, Louisiana. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 20, 2002, 6:21 PM CDT (23:21 UTC)
- Expired
- Jun 20, 2002, 7:15 PM CDT
- In force
- 54 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Acadia Parish, LA
The radar
The Lake Charles radar (KLCH), 79 km from the middle of the area, began a volume at 23:25 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.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.4 hours before the alert went out and 78 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
- 3050 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KLCH 202321 SVRLCH LAC001-210015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA 621 PM CDT THU JUN 20 2002 THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ACADIA PARISH IN SOUTHWEST LOUISIANA * UNTIL 715 PM CDT * AT 613 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SOUTH CENTRAL ACADIA PARISH...MOVING SOUTHWEST AT 15 MPH. * THIS STORM WILL BE NEAR... MORSE BY 630 PM CDT SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND TORRENTIAL RAIN. THIS THUNDERSTORM IS CAPABLE OF PRODUCING VERY LARGE HAIL WHICH COULD CAUSE SIGNIFICANT DAMAGE TO PROPERTY. CALL 337-477-5285 TO REPORT SEVERE WEATHER TO THE WEATHER SERVICE.
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 Jun 20, 2:00 PM CDT, 4 hours 21 minutes earlier.
Area forecast discussion, Jun 20, 2:00 PM CDT, 4 hours 21 minutes before
SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
200 PM CDT THU JUN 20 2002
RADAR THIS AFTERNOON SHOWS SCATTERED SHOWERS AND THUNDERSTORMS AND
ASSOCIATED OUTFLOW BOUNDARIES ACROSS THE FORECAST AREA. GREATEST
CONCENTRATION SO FAR HAS BEEN WEST OF AN ALEXANDRIA TO LAKE CHARLES
LINE. HOWEVER...ACTIVITY FIRING UP JUST EAST OF THE ATCHAFALAYA
MOVING TO THE WEST...SO THOSE IN ACADIANA WILL STILL SEE A CHANCE OF
RAIN BEFORE THE AFTERNOON IS OVER.
WATER VAPOR CURRENTLY IS SHOWING UPPER RIDGE CENTERED OVER
MISSOURI. WHILE SHEAR AXIS IS EXTENDING FROM THE EASTERN GULF ACROSS
FLORIDA TO OFF THE SOUTHEAST US COAST. BETWEEN THE TWO...NORTHEAST
FLOW IS NOTED OVER THE REGION. THIS IS PUSHING THE LEADING EDGE
OF AN AREA OF SUBSIDENCE INTO NORTHERN GEORGIA/NORTHERN ALABAMA AND
POINTING TOWARDS THE FORECAST AREA.
IN THE SHORT TERM...LOSS OF DAYTIME HEATING WILL HELP DISSIPATE
CURRENT ACTIVITY DURING THE EVENING HOURS.
FOR FRIDAY AND OVER THE WEEKEND...UPPER LOW IS EXPECTED TO DEVELOP
OVER THE FLORIDA PANHANDLE. UPPER RIDGE OVER THE CENTRAL PLAINS IS
EXPECTED TO FLATTEN ACROSS THE NORTHERN HALF OF THE US. FLOW
AROUND THE RIDGE WILL HELP PUSH UPPER LOW AND ASSOCIATED INVERTED
TROF AT THE SURFACE SLOWLY WESTWARD INTO SOUTHEAST LOUISIANA BY
SUNDAY. THIS WILL PUT FORECAST AREA ON SUBSIDENCE/DRY SIDE OF
SYSTEM DURING THIS PERIOD. THIS IS REFLECTED BY PROGGED MOISTURE
VALUES OF PWAT NEAR 1.5 INCHES TOMORROW...BETWEEN 1 TO 1.25 INCHES
ON SATURDAY...BEFORE BEGINNING TO RECOVER TO NEAR 1.5 INCHES ON
SUNDAY.
ALSO...AS UPPER LOW APPROACHES...MEAN WIND BETWEEN 85H-5H BECOMES
NORTHEAST. THIS WILL HELP KEEP SEABREEZE ACTIVITY IN CHECK.
THEREFORE...WILL VARY BETWEEN 20 TO 30 PERCENT POPS DURING THE
PERIOD WITH THE DRIEST DAY EXPECTED ON SATURDAY.
EXTENDED FORECAST...
UPPER LOW AND WAVE WILL PUSH OVER THE FORECAST AREA ON MONDAY AND
TUESDAY. MOISTURE PROFILES WILL ALSO BE INCREASING SO DECENT
CHANCE OF RAIN FOR MONDAY AND TUESDAY. SOUTHERLY FLOW ON WEDNESDAY
AND THURSDAY WILL CONTINUE TO PROVIDE MOIST FLOW OFF THE GULF AND
A CHANCE FOR SHOWERS AND THUNDERSTORMS.
.LCH...NONE.
.PRELIM NUMBERS...
FR SA SU
BPT 74 90/72 91/72 90/73 2322132
LCH 73 90/72 91/72 90/73 2322132
LFT 72 91/71 92/72 91/72 2322132
AEX 71 92/70 93/70 92/71 2322132
7-RUANearby
Severe Thunderstorm Warnings in Louisiana, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.