Alert archive / Louisiana / Special Weather Statements in 2015

Special Weather Statement, NWS Lake Charles, LA

April 18, 2015Cameron Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Apr 18, 2015, 3:13 AM CDT for Cameron Parish, Louisiana. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 18, 2015, 3:13 AM CDT (08:13 UTC)
Expired
Apr 18, 2015, 3:45 AM CDT
In force
32 min
Issued by
NWS Lake Charles, LA

County Cameron Parish, LA

The radar

The Lake Charles radar (KLCH), 47 km from the middle of the area, began a volume at 08:16 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 00:00Z, 8.2 hours before the alert went out and 45 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.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2015-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1637 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2015-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1637 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
835 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 18, 2:13 AM CDT, 1 hour earlier.

Area forecast discussion, Apr 18, 2:13 AM CDT, 1 hour before
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Hazardous weather outlook, Apr 17, 4:49 AM CDT, 22 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
449 AM CDT FRI APR 17 2015

GMZ430-432-435-450-452-455-470-472-475-LAZ027>033-041>045-052>055-
073-074-TXZ180-201-215-216-259>262-181000-
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-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-
449 AM CDT FRI APR 17 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST
GULF OF MEXICO...CENTRAL LOUISIANA...SOUTH CENTRAL LOUISIANA...
SOUTHWEST LOUISIANA...WEST CENTRAL LOUISIANA...EAST CENTRAL TEXAS
AND SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT
WHILE ISOLATED AREAS OF HEAVY RAIN WILL BE POSSIBLE THIS
MORNING...SHOWER AND THUNDERSTORM ACTIVITY SHOULD DECREASE TODAY.
SOME FLOODING WILL STILL BE POSSIBLE ESPECIALLY EARLY THIS
MORNING. SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE
THIS AFTERNOON. BESIDES THE POTENTIAL FOR FLOODING EARLY THIS
MORNING...NO WIDESPREAD WEATHER HAZARDS ARE EXPECTED FOR THE
REMAINDER OF THE DAY.

AN UPPER LEVEL DISTURBANCE WILL BRING INCREASING SHOWERS AND
THUNDERSTORMS TO THE AREA TONIGHT. FLOODING WILL BE POSSIBLE
ESPECIALLY AFTER MIDNIGHT. A FEW THUNDERSTORMS MAY APPROACH
SEVERE LIMITS AS WELL.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED ON SATURDAY AND
SATURDAY NIGHT. SINCE THE GROUND IS ALREADY SATURATED...FLOODING
OF POOR DRAINAGE AREAS MAY OCCUR. STRONG THUNDERSTORMS MAY PRODUCE
HAIL AND GUSTY WINDS AND A FEW STORMS MAY REACH SEVERE LIMITS.

SHOWERS AND THUNDERSTORMS WILL ENDING ON SUNDAY WITH DRY WEATHER
FORECASTED FOR EARLY NEXT WEEK. THE APPROACH OF AN UPPER LEVEL LOW
PRESSURE SYSTEM WILL BRING A CHANCE OF SHOWERS AND THUNDERSTORMS
TO THE AREA BY THE MIDDLE OF NEXT WEEK. NO WIDESPREAD HAZARDOUS
WEATHER IS EXPECTED WITH THIS SYSTEM AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT AND SATURDAY.

In the hours before

Special weather statement, Apr 17, 11:39 PM CDT, 3 hours 34 minutes before
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Special weather statement, Apr 18, 12:46 AM CDT, 2 hours 27 minutes before
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Special weather statement, Apr 18, 12:56 AM CDT, 2 hours 17 minutes before
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Special weather statement, Apr 18, 1:07 AM CDT, 2 hours 6 minutes before
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Special weather statement, Apr 18, 1:42 AM CDT, 1 hour 31 minutes before
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Special weather statement, Apr 18, 3:13 AM CDT, 0 minutes before
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The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 8:58 PM CDTSpecial Marine WarningLCH62 min
Apr 17, 9:54 PM CDTSpecial Marine WarningLCH66 min
Apr 17, 10:45 PM CDTSpecial Marine WarningLCH60 min
Apr 17, 10:51 PM CDTSpecial Weather StatementLCHCameron54 min
Apr 17, 10:54 PM CDTSpecial Marine WarningLCH36 min
Apr 17, 11:39 PM CDTSpecial Weather StatementLCHCalcasieu, Jefferson Davis51 min
Apr 17, 11:44 PM CDTSpecial Marine WarningLCH61 min
Apr 18, 12:46 AM CDTSpecial Weather StatementLCHAcadia29 min
Apr 18, 12:47 AM CDTSpecial Marine WarningLCH28 min
Apr 18, 12:56 AM CDTSpecial Weather StatementLCHSaint Martin, St. Mary64 min
Apr 18, 1:00 AM CDTSpecial Marine WarningLCH60 min
Apr 18, 1:07 AM CDTSpecial Weather StatementLCHSaint Landry38 min
Apr 18, 1:20 AM CDTSpecial Marine WarningLCH25 min
Apr 18, 1:42 AM CDTSpecial Weather StatementLCHSaint Landry48 min
Apr 18, 1:46 AM CDTAreal Flood AdvisoryLCHCalcasieu3 hr
Apr 18, 2:10 AM CDTSpecial Marine WarningLCH65 min
Apr 18, 10:25 AM CDTRiver Flood WarningLCHBeauregard63 hr
Apr 18, 10:25 AM CDTRiver Flood WarningLCHAllen3 days
Apr 18, 10:25 AM CDTRiver Flood WarningLCHAllen, Jefferson Davis51 hr
Apr 18, 10:25 AM CDTRiver Flood WarningLCHCalcasieu9 days
Apr 18, 10:34 AM CDTRiver Flood WarningLCHLafayette, Vermilion33 hr
Apr 17, 9:36 PM CDTSevere Thunderstorm WarningLCHJefferson24 min
Apr 17, 10:04 PM CDTSpecial Weather StatementLCHJefferson56 min
Apr 17, 10:41 PM CDTAreal Flood AdvisoryLCHJefferson64 min
Apr 18, 1:16 AM CDTAreal Flood AdvisoryLCHJefferson3 hr
Apr 18, 10:25 AM CDTRiver Flood WarningLCHJefferson, Orange3 days

Nearby

Special Weather Statements in Louisiana, 2015Every special weather statement in 2015

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.