Alert archive / Louisiana / Flood Watches in 2008

Flood Watch 1, NWS Lake Charles, LA

November 11, 20089 parishes in Louisiana; Hardin County, Tyler County, Texas

NWS Lake Charles, LA issued this flood watch at Nov 11, 2008, 9:19 PM CST for 9 parishes in Louisiana; Hardin County, Tyler County, Texas. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Nov 11, 2008, 9:19 PM CST (03:19 UTC)
Expired
Nov 12, 2008, 9:42 AM CST
In force
12 hr
Issued by
NWS Lake Charles, LA
Flood severity
None

Counties Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Evangeline Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Vernon Parish, LA, Hardin County, TX, Tyler County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.3 hours before the alert went out and 73 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 2008-11-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 278 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 2008-11-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.1939587897Sfc1 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
278 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
894 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Nov 11, 3:35 PM CST, 5 hours 44 minutes earlier.

Area forecast discussion, Nov 11, 3:35 PM CST, 5 hours 44 minutes before
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Hazardous weather outlook, Nov 11, 5:42 AM CST, 15 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
542 AM CST TUE NOV 11 2008

GMZ430-432-435-450-452-455-470-472-475-LAZ027>033-041>045-051>055-
TXZ180>182-201-215-216-121145-
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-
542 AM CST TUE NOV 11 2008

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

A SLIGHT RISK FOR SEVERE THUNDERSTORMS WEST OF A LINE FROM LAKE
CHARLES TO LEESVILLE THROUGH TONIGHT. LARGE HAIL IS THE MAIN
CONCERN AS AN UPPER LEVEL TROUGH OVER TEXAS APPROACHES. THERE IS A
MARGINAL THREAT FOR ROTATIN THUNDERSTORMS DEPENDING ON HOW MUCH
DAYTIME HEATING CAN DESTABILIZE THE ATMOSPHERE. ALTHOUGH THERE IS
SUFFICIENT LOW LEVEL SHEAR BELOW 5K FEET, RAIN COOLED AIR SHOULD
KEEP TEMPERATURES BELOW CONVECTIVE LEVELS.

THE MAIN ISSUE TODAY SHOULD BE HEAVY RAINFALL FROM LUFKIN TO LEESVILLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A SECONDARY LOW LIFTING OUT OF SOUTH TEXAS COASTAL AREA AND INTO
OUR AREA WILL COMBINE WITH THE UPPER LEVEL TROF TO PRODUCE HEAVY
RAINFALL INTO WEDNESDAY NIGHT. SHOWERS SHOULD TAPER OFF ON
THURSDAY AS THE MAIN TROF AXIS MOVES SLOWLY EAST. TOTAL RAINFALL
AMOUNTS SHOULD RANGE FROM AROUND AN INCH ALONG THE I-10 CORRIDOR
TO UPWARDS OF 4 TO 6 INCHES IN THE LAKES AREA OF SOUTHEAST TEXAS
AND CENTRAL LOUISIANA. FLOODING DOES NOT APPEAR TO BE A PROBLEM AS
THE GROUND HAS BEEN VERY DRY SINCE IKE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING FOR A FEW EMBEDDED
THUNDERSTORMS REACHING SEVERE LEVELS...MAINLY LARGE HAIL.

SWEENEY

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 12, 2:11 AM CSTSevere Thunderstorm WarningLCHBeauregard, Calcasieu49 min
Nov 12, 2:51 AM CSTSevere Thunderstorm WarningLCHAllen, Beauregard, Calcasieu, Jefferson Davis39 min
Nov 12, 3:32 AM CSTSevere Thunderstorm WarningLCHCalcasieu43 min
Nov 12, 4:04 AM CSTAreal Flood AdvisoryLCHCalcasieu3 hr
Nov 11, 11:27 PM CSTRiver Flood WarningLCHHardin, Jefferson12 days
Nov 12, 1:17 AM CSTSevere Thunderstorm WarningLCHHardin, Tyler28 min
Nov 12, 1:40 AM CSTSevere Thunderstorm WarningLCHHardin, Jasper, Tyler35 min
Nov 12, 1:57 AM CSTFlash Flood WarningLCHJasper, Tyler2 hr
Nov 12, 3:04 AM CSTAreal Flood AdvisoryLCHJefferson, Orange3 hr
Nov 12, 9:53 AM CSTRiver Flood WarningLCHJefferson24 hr

Nearby

Flood Watches in Louisiana, 2008Flood Watches in Texas, 2008Every flood watch in 2008

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.