Alert archive / Louisiana / Special Weather Statements in 2016

Special Weather Statement, NWS Lake Charles, LA

March 31, 2016Vernon Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Mar 31, 2016, 3:44 PM CDT for Vernon Parish, Louisiana. It was in force for 31 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
Mar 31, 2016, 3:44 PM CDT (20:44 UTC)
Expired
Mar 31, 2016, 4:15 PM CDT
In force
31 min
Issued by
NWS Lake Charles, LA

County Vernon Parish, LA

The radar

The Ft Polk radar (KPOE), 17 km from the middle of the area, began a volume at 20:44 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

Shreveport, LA (KBAD), launched 12:00Z, 8.7 hours before the alert went out and 147 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, Shreveport, LA at 12:00Z on 2016-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1130 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, Shreveport, LA at 12:00Z on 2016-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 square meters per square second.1939587897117136Sfc1 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
1130 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
602 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Mar 31, 2:13 PM CDT, 1 hour 31 minutes earlier.

Area forecast discussion, Mar 31, 2:13 PM CDT, 1 hour 31 minutes before
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Hazardous weather outlook, Mar 31, 10:31 AM CDT, 5 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1031 AM CDT THU MAR 31 2016

GMZ430-432-435-450-452-455-470-472-475-LAZ027>033-041>045-052>055-
073-074-TXZ180-201-215-216-259>262-011545-
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-
1031 AM CDT THU MAR 31 2016

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
SCATTERED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED AGAIN TODAY. A
FEW STRONG TO SEVERE STORMS WILL BE POSSIBLE...MAINLY DURING THE
AFTERNOON AND MAINLY ACROSS PORTIONS OF CENTRAL AND SOUTH CENTRAL
LOUISIANA. THE PRIMARY RISKS WILL BE DAMAGING WINDS AND LARGE HAIL
AND TO A LESSER DEGREE AN ISOLATED TORNADO OR TWO. IN
ADDITION...STORMS WILL BE CAPABLE OF PRODUCING FREQUENT CLOUD TO
GROUND LIGHTNING AND HEAVY RAINFALL.

OVER THE COASTAL WATERS...A SMALL CRAFT ADVISORY IS IN EFFECT OVER
THE OUTER COASTAL WATERS AS SEAS ARE EXPECTED TO RUN BETWEEN 4 AND
7 FEET TODAY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
SHOWERS AND THUNDERSTORMS WILL CONTINUE ON FRIDAY. THE RISK FOR
SEVERE STORMS WILL BE LESS...BUT A MARGINAL RISK WILL CONTINUE
ACROSS PORTIONS OF THE LOWER ATCHAFALAYA RIVER BASIN.
OTHERWISE...FREQUENT CLOUD TO GROUND LIGHTNING...GUSTY WINDS AND
HEAVY RAINFALL WILL BE POSSIBLE IN SOME OF THE STORMS.

OVER THE COASTAL WATERS...STRONG OFFSHORE WINDS WILL DEVELOP IN
THE WAKE OF THE COLD FRONT FRIDAY INTO SATURDAY. SMALL CRAFT
ADVISORIES WILL LIKELY BE REQUIRED FROM FRIDAY NIGHT INTO
SATURDAY.

HIGH PRESSURE WILL BUILD OVER THE REGION BY LATE IN THE WEEKEND
AND CONTINUE THROUGH THE PERIOD. THIS WILL BRING DRIER WEATHER
AND ALLOW WINDS AND SEAS TO DIMINISH OVER THE COASTAL WATERS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON.

24

In the hours before

Special weather statement, Mar 31, 3:44 PM 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
Mar 31, 1:47 AM CDTRiver Flood WarningLCHCalcasieu29 hr
Mar 31, 2:33 AM CDTSpecial Weather StatementLCHAcadia27 min
Mar 31, 3:01 AM CDTSpecial Weather StatementLCHSaint Landry44 min
Mar 31, 10:14 AM CDTSmall Craft AdvisoryLCH11 hr
Mar 31, 4:18 PM CDTSpecial Weather StatementLCHRapides42 min

Nearby

Special Weather Statements in Louisiana, 2016Every special weather statement in 2016

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.