Alert archive / Louisiana / Areal Flood Warnings in 2012

Areal Flood Warning 16, NWS Lake Charles, LA

March 12, 20126 parishes in Louisiana

NWS Lake Charles, LA issued this areal flood warning at Mar 12, 2012, 11:29 PM CDT for 6 parishes in Louisiana. It was in force for 36 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 12, 2012, 11:29 PM CDT (04:29 UTC)
Expired: Mar 14, 2012, 11:30 AM CDT
In force: 36 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Acadia Parish, LA, Allen Parish, LA, Evangeline Parish, LA, Lafayette Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA

The radar

The Lake Charles radar (KLCH), 102 km from the middle of the area, began a volume at 04:29 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 4.5 hours before the alert went out and 243 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 765 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 492 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood 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 areal flood warning went out at Mar 12, 11:21 PM CDT, 8 minutes earlier.

Area forecast discussion, Mar 12, 11:21 PM CDT, 8 minutes before

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Hazardous weather outlook, Mar 12, 5:10 AM CDT, 18 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
510 AM CDT MON MAR 12 2012

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
131100-
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-
510 AM CDT MON MAR 12 2012

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

LOW LAND FLOODING MAY OCCUR NEAR SOME AREA RIVERS AND WHERE AMPLE
RAINFALL OCCURRED DURING SUNDAY. SCATTERED SHOWERS AND STORMS WILL
BE POSSIBLE ACROSS PORTIONS OF THE AREA AND THIS MAY FARTHER
AGGRAVATE FLOODING CONCERNS ACROSS SOUTH CENTRAL LOUISIANA THROUGH
THE AFTERNOON.

PLEASE SEE THE LATEST RIVER STATEMENT REGARDING RIVER FLOODING.

AREAS OF FOG MAY DEVELOP LATE TONIGHT AND INTO TUESDAY MORNING.
THIS MAY RESTRICT VISIBILITIES TO UNDER A MILE ACROSS PORTIONS OF
THE AREA.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

MINOR RIVER FLOODING IS EXPECTED TO CONTINUE ALONG SECTIONS OF THE
CALCASIEU RIVER AND BUNDICK CREEK. ISOLATED THUNDERSTORMS ARE
EXPECTED EACH AFTERNOON, HOWEVER SEVERE WEATHER IS NOT EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

GMZ430-432-435-450-452-455-470-472-475-131100-
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-
510 AM CDT MON MAR 12 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST
GULF OF MEXICO.

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE ACROSS THE
COASTAL WATERS TODAY. OCCASIONAL LIGHTNING STRIKES AND GUSTY WINDS ARE
EXPECTED TO BE THE BIGGEST CONCERNS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

In the hours before

Local storm report, Mar 12, 5:32 PM CDT, 5 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE LAKE CHARLES LA
532 PM CDT MON MAR 12 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1108 PM     TORNADO          5 NE JENNINGS           30.27N 92.62W
03/11/2012  F0               ACADIA             LA   NWS STORM SURVEY

            A TORNADO TOUCHED DOWN NEAR THE JEFF DAVIS-ACADIA PARISH
            LINE, A FEW MILES NORTH OF I-10. THE MOST SIGNIFICANT
            DAMAGE OCCURRED NEAR THE INTERSECTION OF RIVERSIDE AND
            SIMEO ROADS...WHERE SEVERAL HARD WOOD TREES WERE
            UPROOTED...SEVERAL PINE TREES WERE SNAPPED...ONE HOME
            LOST A SIGNIFICANT NUMBER OF SHINGLES...AND 3 OTHER HOMES
            RECEIVED MINOR ROOF DAMAGE. A BARN HAD A WALL BLOWN
            OUT...AND AN UNSECURED STORAGE BUIDLING WAS FLIPPED AND
            DESTROYED. THE PATH LENGTH WAS 1.5 MILES AND WIDTH WAS 40
            YARDS.

&&

ERICKSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 8:42 PM CDT	River Flood Warning	LCH	Acadia, Allen, Evangeline, Jefferson Davis	61 hr
Mar 12, 10:43 PM CDT	Marine Dense Fog Advisory	LCH		11 hr
Mar 13, 2:53 PM CDT	Marine Dense Fog Advisory	LCH		16 hr

Nearby

Areal Flood Warnings in Louisiana, 2012 Every areal flood warning in 2012

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.