Alert archive / Louisiana / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 179, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Oct 9, 2009, 2:47 PM CDT for Lafayette Parish, Saint Landry Parish, Saint Martin Parish, Louisiana. It was in force for 28 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
- Oct 9, 2009, 2:47 PM CDT (19:47 UTC)
- Expired
- Oct 9, 2009, 3:15 PM CDT
- In force
- 28 min
- Issued by
- NWS Lake Charles, LA
- Area
- Storm-based polygon
Counties Lafayette Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA
The radar
The Lake Charles radar (KLCH), 129 km from the middle of the area, began a volume at 19:50 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
Jackson, MS (KJAN), launched 12:00Z, 7.8 hours before the alert went out and 282 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
- 1673 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 594 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 232 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 2.0
- Supercell composite
- 12.7
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 9, 1:17 PM CDT, 1 hour 30 minutes earlier.
Area forecast discussion, Oct 9, 1:17 PM CDT, 1 hour 30 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAKE CHARLES LA 622 AM CDT FRI OCT 9 2009 GMZ430-432-435-450-452-455-470-472-475-LAZ027>033-041>045-051>055- TXZ180>182-201-215-216-101100- 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 EXTENDING FROM 20 NM TO 60 NM- WATERS FROM INTRACOASTAL CITY, LA TO CAMERON, LA EXTENDING FROM 20 NM TO 60 NM- WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY, LA EXTENDING FROM 20 NM TO 60 NM-VERNON-RAPIDES-AVOYELLES-BEAUREGARD- ALLEN-EVANGELINE-ST. LANDRY-CALCASIEU-JEFFERSON DAVIS-ACADIA- LAFAYETTE-UPPER ST. MARTIN-CAMERON-VERMILION-IBERIA-ST. MARY- LOWER ST. MARTIN-TYLER-JASPER-NEWTON-HARDIN-JEFFERSON-ORANGE- 622 AM CDT FRI OCT 9 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST GULF OF MEXICO...CENTRAL LOUISIANA...SOUTH CENTRAL LOUISIANA... SOUTHWEST LOUISIANA...WEST CENTRAL LOUISIANA AND SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS WILL INCREASE SIGNIFICANTLY BY THIS AFTERNOON AS ANOTHER COLD FRONT APPROACHES AND SLOWLY MOVES THROUGH THE REGION. THE MAIN WEATHER THREAT FROM THIS SYSTEM WILL BE LOTS OF RAINFALL...EXPECTING ONE TO THREE INCHES THIS AFTERNOON AND TONIGHT. ALSO...A FEW OF THE THUNDERSTORMS COULD REACH SEVERE LIMITS...WITH STRAIGHT LINE WIND DAMAGE POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE CHANCE OF SHOWERS AND THUNDERSTORMS WILL CONTINUE FOR THE REMAINDER OF THE WEEKEND INTO NEXT WEEK. THE FRONT IS EXPECTED TO STALL ACROSS THE COASTAL WATERS THIS WEEKEND AND MOVE BACK NORTH BY MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON AND EVENING FOR THE SEVERE WEATHER AND FLOODING THREAT.
In the hours before
Special weather statement, Oct 9, 12:21 PM CDT, 2 hours 26 minutes before
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</html>Local storm report, Oct 9, 2:42 PM CDT, 5 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 |
|---|---|---|---|---|
| Oct 9, 12:49 PM CDT | Special Marine Warning | LCH | 116 min | |
| Oct 9, 2:06 PM CDT | Severe Thunderstorm Warning | LCH | Acadia, Calcasieu, Cameron, Jefferson Davis, Lafayette, Saint Landry and 1 more | 54 min |
| Oct 9, 2:49 PM CDT | Special Marine Warning | LCH | 56 min | |
| Oct 9, 3:02 PM CDT | Severe Thunderstorm Warning | LCH | Cameron, Lafayette, Vermilion | 58 min |
| Oct 9, 3:29 PM CDT | Severe Thunderstorm Warning | LCH | Iberia, Saint Martin, St. Mary, Vermilion | 31 min |
| Oct 9, 3:30 PM CDT | Special Marine Warning | LCH | 60 min | |
| Oct 9, 4:07 PM CDT | Severe Thunderstorm Warning | LCH | Iberia, Saint Martin, St. Mary | 53 min |
| Oct 9, 4:15 PM CDT | Special Marine Warning | LCH | 90 min | |
| Oct 9, 5:39 PM CDT | Special Marine Warning | LCH | 81 min | |
| Oct 9, 12:41 PM CDT | Areal Flood Advisory | LCH | Jefferson, Orange | 3 hr |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2009Every severe thunderstorm warning in 2009
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.