Alert archive / Louisiana / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 11, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Feb 18, 2013, 6:31 PM CST for Allen Parish, Beauregard Parish, Evangeline Parish, Louisiana. It was in force for 44 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
- Feb 18, 2013, 6:31 PM CST (00:31 UTC)
- Expired
- Feb 18, 2013, 7:15 PM CST
- In force
- 44 min
- Issued by
- NWS Lake Charles, LA
- Area
- Storm-based polygon
Counties Allen Parish, LA, Beauregard Parish, LA, Evangeline Parish, LA
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 0.5 hours before the alert went out and 218 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
- 800 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 593 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 361 m²/s²
- 0-3 km storm-relative helicity
- 392 m²/s²
- Significant tornado parameter
- 2.0
- Supercell composite
- 6.8
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 Feb 18, 4:00 PM CST, 2 hours 31 minutes earlier.
Area forecast discussion, Feb 18, 4:00 PM CST, 2 hours 31 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
400 PM CST MON FEB 18 2013
.DISCUSSION...A FAIRLY WARM AND MOIST AIR MASS HAS ADVECTED IN
DURING THE PAST 12 TO 16 HOURS AHEAD OF AN APPROACHING COLD FRONT
AND SHORT WAVE. AHEAD OF THE SHORT WAVE MEAGER INSTABILITY EXIST IN
A HIGHLY SHEARED ENVIRONMENT. THIS MAY LEAD TO ONE OR TWO ISOLD
STRONG TO SEVERE STORMS THROUGH THE EVENING MAINLY AWAY FROM THE
COOLING EFFECTS OF THE GULF AND FARTHER NORTH AND CLOSER TO THE
BETTER DYNAMICS... OR GENERALLY NORTH OF HWY 190. ALSO FOR THE
REST OF THE AFTERNOON... THE WINDS CONTINUE TO RANGE IN THE 15 TO
25 MPH RANGE WITH HIGHER GUSTS. THE WINDS HAVE DECREASED ACROSS
NORTHWEST SECTIONS OF THE CWA UNDER THE RAIN, HOWEVER WINDS MAY
STILL INCREASE FOR AN HR BEHIND THE STORMS. WILL LET THE WIND ADV
RIDE UNTIL 6 PM.
TONIGHT...THE FRONT WILL MOVE TO BPT LATE IN THE EVENING, TO LCH
AND AEX AROUND MIDNIGHT, AND TO LFT AND ARA EARLY TUE MORNING.
RAIN CHANCES WILL DECREASE BEHIND THE BOUNDARY AS A DRIER AIR MASS
MOVES IN.
TUESDAY A RIDGE WILL QUICKLY MOVE ACROSS THE REGION PROVIDING A
BRIEF BREAK FROM HIGHER RAIN CHANCES. TUE NIGHT A TROUGH WILL DIG
INTO THE SOUTHWEST WITH A LEE SIDE LOW DEVELOPING IN THE PLAINS BY
WED. THIS WILL ALLOW THE RETURN FLOW TO BEGIN AS MOISTURE IS
DRAWN NORTH BETWEEN THE DEPARTING RIDGE AND THE DEVELOPING LOW.
THE SURFACE LOW WILL SLOWLY MOVE ACROSS THE PLAINS AND INTO THE
MIDWEST BY LATE IN THE WEEK. THIS WILL SEND A COLD FRONT INTO OUR
AREA THU AND STALL OVER THE SOUTH HALF OF THE CWA INTO FRI. THE
STALLED BOUNDARY MAY FINALLY BE PUSHED OUT OF THE AREA LATER
FRIDAY, HOWEVER MODELS DO DIFFER AND RAIN MAY LINGER. OPTED TO
KEEP AT LEAST A SLIGHT CHANCE FOR PORTIONS OF THE AREA THROUGH THE
WEEKEND.
&&
.MARINE...A TIGHT PRESSURE GRADIENT WILL CONTINUE TO KEEP WINDS
AROUND 20KTS OR HIGHER THROUGH THE EVENING. A COLD FRONT WILL
ENTER THE COASTAL WATERS AROUND MIDNIGHT WITH WINDS SLIGHTLY
DECREASING AHEAD OF THE BOUNDARY, HOWEVER AS THE BOUNDARY PASSES
WINDS WILL INCREASE BACK INTO SCA CRITERIA AS HIGH PRESSURE BUILDS
IN. THE RIDGE WILL QUICKLY MOVE ACROSS THE SOUTH TUESDAY WITH THE
SOUTH FLOW RETURNING TUE NIGHT. ANOTHER SYSTEM WILL TAKE SHAPE WED
WITH WINDS AGAIN RAMPING UP TO SCA CONDITIONS LATE WED THROUGH THU.
&&
.PRELIMINARY POINT TEMPS/POPS...
KLCH 53 67 44 61 52 / 60 10 10 30 30
KBPT 51 68 47 61 56 / 60 10 10 40 40
KAEX 46 62 40 55 45 / 80 10 10 30 40
KLFT 53 66 44 61 52 / 80 10 10 20 20
&&
.LCH WATCHES/WARNINGS/ADVISORIES...
LA...WIND ADVISORY UNTIL 6 PM CST THIS EVENING FOR THE FOLLOWING
ZONES: ACADIA...ALLEN...AVOYELLES...BEAUREGARD...
CALCASIEU...EAST CAMERON...EVANGELINE...IBERIA...JEFFERSON
DAVIS...LAFAYETTE...LOWER ST. MARTIN...RAPIDES...ST.
LANDRY...ST. MARY...UPPER ST. MARTIN...VERMILION...VERNON...
WEST CAMERON.
TX...WIND ADVISORY UNTIL 6 PM CST THIS EVENING FOR THE FOLLOWING
ZONES: HARDIN...JEFFERSON...NORTHERN JASPER...NORTHERN
NEWTON...ORANGE...SOUTHERN JASPER...SOUTHERN NEWTON...TYLER.
GM...SMALL CRAFT ADVISORY UNTIL NOON CST TUESDAY FOR THE FOLLOWING
ZONES: COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT
20 NM...COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA
OUT 20 NM...COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO
INTRACOASTAL CITY LA OUT 20 NM...WATERS FROM INTRACOASTAL
CITY TO CAMERON LA FROM 20 TO 60 NM...WATERS FROM CAMERON
LA TO HIGH ISLAND TX FROM 20 TO 60 NM...WATERS FROM LOWER
ATCHAFALAYA RIVER TO INTRACOASTAL CITY LA FROM 20 TO 60 NM.
SMALL CRAFT ADVISORY UNTIL 6 PM CST THIS EVENING FOR THE
FOLLOWING ZONES: CALCASIEU LAKE...SABINE LAKE...VERMILION
BAY.
&&Hazardous weather outlook, Feb 18, 4:48 AM CST, 13 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAKE CHARLES LA 448 AM CST MON FEB 18 2013 LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262- 191200- VERNON-RAPIDES-AVOYELLES-BEAUREGARD-ALLEN-EVANGELINE-ST. LANDRY- CALCASIEU-JEFFERSON DAVIS-ACADIA-LAFAYETTE-UPPER ST. MARTIN- VERMILION-IBERIA-ST. MARY-LOWER ST. MARTIN-WEST CAMERON- EAST CAMERON-TYLER-HARDIN-JEFFERSON-ORANGE-NORTHERN JASPER- NORTHERN NEWTON-SOUTHERN JASPER-SOUTHERN NEWTON- 448 AM CST MON FEB 18 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL LOUISIANA...SOUTH CENTRAL LOUISIANA...SOUTHWEST LOUISIANA...WEST CENTRAL LOUISIANA AND SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT VERY BREEZY AND GUSTY SOUTH WINDS WILL OCCUR FROM MID MORNING THROUGH SUNSET...ESPECIALLY ALONG AND SOUTH OF THE I-10 CORRIDOR...AS A DEEP LOW PRESSURE SYSTEM MOVES OUT OF THE PLAINS. A WIND ADVISORY WILL BE IN EFFECT TO ACCOUNT FOR SUSTAINED WINDS BETWEEN 20 AND 25 MPH WITH GUSTS TO 30 MPH. A COLD FRONT WILL MOVE ACROSS DURING THE EVENING HOURS THROUGH SHORTLY AFTER MIDNIGHT. NUMEROUS SHOWERS AND A FEW THUNDERSTORMS WILL DEVELOP WITH THIS SYSTEM. AT THIS TIME...THE POTENTIAL FOR STRONG THUNDERSTORMS IS LOW. ALTHOUGH SOME GUSTY WINDS AND LOCALLY HEAVY RAINFALL MAY ACCOMPANY THE LINE OF SHOWERS AND ISOLATED THUNDERSTORMS AS IT MOVE ACROSS AHEAD OF THE COLD FRONT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ANOTHER STORM SYSTEM WILL MOVE ACROSS ON THURSDAY. THIS SYSTEM IS FORECAST TO BE A LITTLE MORE POTENT. THEREFORE...SOME STRONG THUNDERSTORMS WILL BE POSSIBLE WITH GUSTY WINDS...LOCALLY HEAVY RAINFALL...AND CLOUD TO GROUND LIGHTNING STRIKES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. GMZ430-432-435-450-452-455-470-472-475-191200- SABINE LAKE-CALCASIEU LAKE-VERMILION BAY- COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM- COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM- COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY LA OUT 20 NM- WATERS FROM CAMERON LA TO HIGH ISLAND TX FROM 20 TO 60 NM- WATERS FROM INTRACOASTAL CITY TO CAMERON LA FROM 20 TO 60 NM- WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY LA FROM 20 TO 60 NM- 448 AM CST MON FEB 18 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST GULF OF MEXICO. .DAY ONE...TODAY AND TONIGHT STRONG SOUTH WINDS CAN BE EXPECTED THROUGH THIS EVENING AS DEEP LOW PRESSURE SYSTEM MOVES ACROSS THE PLAINS. MODERATE TO STRONG NORTH WINDS WILL THEN DEVELOP BEHIND A COLD FRONT LATER TONIGHT. A SMALL CRAFT ADVISORY WILL BE IN EFFECT TO ACCOUNT FOR THIS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ANOTHER STORM SYSTEM WILL DEVELOP BY WEDNESDAY OVER THE ROCKIES AND MOVE ACROSS ON THURSDAY. MODERATE TO STRONG WINDS WILL AGAIN BE LIKELY AHEAD OF THIS SYSTEM. SOME STRONG STORMS WILL ALSO BE POSSIBLE ON THURSDAY AFTERNOON WITH THIS SYSTEM. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. RUA
In the hours before
Local storm report, Feb 18, 6:29 PM CST, 2 minutes before
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</html>The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 8:55 PM CST | Special Weather Statement | LCH | Cameron | 35 min |
| Feb 18, 9:28 PM CST | Special Weather Statement | LCH | Cameron | 32 min |
| Feb 19, 2:41 PM CST | Small Craft Advisory | LCH | 54 hr |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2013Every severe thunderstorm warning in 2013
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.