Special Weather Statement, NWS Lake Charles, LA

Area Forecast Discussion
National Weather Service Lake Charles LA
623 AM CDT Sun Aug 6 2017

.AVIATION...
Areas of fog and low stratus have developed across central
LA and interior east TX this morning resulting in IFR/LIFR
conditions. KAEX will continue to see IFR conditions with TEMPO
LIFR for the next 1-2 hours before the fog begins to dissipate
shortly after sunrise. For coastal TAF sites, SCT low level clouds
and steadier showers can already be seen on IR satellite imagery.
Showers and thunderstorms are expected to develop slightly earlier
compared to the past several days with activity beginning to move
inland by mid-morning. Showers and thunderstorms will continue
through the afternoon before dissipating after sunset. Except for
in the immediate vicinity of showers and thunderstorms, VFR
conditions are expected to prevail today.

&&

.PREV DISCUSSION... /issued 307 AM CDT Sun Aug 6 2017/

DISCUSSION...

Short Term...Today through Monday
Skies have partially cleared overnight as yesterday evening's
thunderstorm activity diminished. Storms were enhanced during the
afternoon by short wave energy traversing in northwest flow aloft.
Overnight subsidence has prevailed. However...with next
approaching wave...short term models are forecasting the
development of showers and thunderstorms this morning near
Vermilion Bay and Acadiana area. Activity is forecasted to spread
inland during the afternoon. PWATs are 2 to 2.5 inches and LCH and
LIX soundings have virtually no CIN. Will maintain highest POPs
over eastern areas as mesoscale forcing should be more prevalent
there. Higher than normal rain coverage will continue Monday as a
near similar pattern prevails. Weak upper trough over the western
Gulf may further enhance activity. With higher than normal rain
chances...daytime high temperatures will be slightly below normal.

Long Term...Monday night through Saturday
Will maintain near to slightly above normal rain chances through
most of the week. Tropical wave over the central Caribbean is
forecasted to further strengthen and will likely maintain very deep
moisture over the area. Also GFS and ECMWF hint at a weak shear axis
over the northern Gulf. Will keep POPs in the 30-50 percent range
for most of the week. Will have slightly lower POPs for late in
the week as both models are forecasting a weak elongated
anticyclone over the Gulf coast states. Temperatures should be
near or slightly below normal.

Regarding the tropical wave over the Caribbean...NHC gives this
system an 80 percent chance of development.  A growing consensus of
models have this wave moving west northwest toward the Bay of
Campeche by late Tuesday. For now no significant impacts are
expected for our area.

MARINE...
Fairly benign marine conditions are expected for early in the week.
However...with potential development of tropical system over the
Caribbean...a modest increase in waves and potentially tides are
forecasted for the middle of the week. Conditions will be favorable
for late night and early morning coastal showers and isolated
storms through much of the week.

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  90  75  89  73 /  50  20  70  40
LCH  90  78  89  76 /  50  20  50  20
LFT  89  76  89  75 /  60  20  60  20
BPT  90  78  89  77 /  30  30  50  20

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...None.
TX...None.
GM...None.
&&

AVIATION...26

Hazardous Weather Outlook
National Weather Service Lake Charles LA
440 AM CDT Sun Aug 6 2017

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
070945-
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-
440 AM CDT Sun Aug 6 2017

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
Showers and thunderstorms are expected to develop later this
morning into the afternoon hours as daytime heating and plentiful
moisture interacts with the seabreeze boundary. Some of the
stronger thunderstorms could produce locally heavy rainfall,
frequenting lightning and gusty winds. No severe weather is
expected.

.DAYS TWO THROUGH SEVEN...Monday through Saturday
Scattered to numerous showers and thunderstorms are forecasted
through much of the week. The environment will be favorable
locally heavy rain. Gusty winds and frequent lightning may also
accompany a few storms.

.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.

GMZ430-432-435-450-452-455-470-472-475-070945-
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-
440 AM CDT Sun Aug 6 2017

This Hazardous Weather Outlook is for portions of Gulf of Mexico.

.DAY ONE...Today and Tonight
Outside of thunderstorms during the late night and early morning
hours, no hazardous marine weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday
Outside of thunderstorms during the late night and early morning
hours, no hazardous marine weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.

Special Weather Statement
National Weather Service Lake Charles LA
1045 AM CDT SUN AUG 6 2017

LAZ033-044-045-053-061615-
Iberia LA-Lafayette LA-St. Landry LA-Upper St. Martin LA-
1045 AM CDT SUN AUG 6 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN IBERIA...EASTERN
LAFAYETTE...NORTHWESTERN ST. MARTIN AND EASTERN ST. LANDRY PARISHES
UNTIL 1115 AM CDT...

At 1045 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Opelousas to near Jefferson Island. Movement
was northeast at 15 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Lafayette, New Iberia, Opelousas, Breaux Bridge, Carencro, St.
Martinville, Leonville, Arnaudville, Palmetto, Avery Island,
Broussard, Youngsville, Sunset, Port Barre, Henderson, Washington,
Grand Coteau, Loreauville, Cade and Cecilia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 2984 9194 3000 9198 3003 9196 3005 9200
      3054 9213 3084 9188 3000 9166
TIME...MOT...LOC 1545Z 226DEG 15KT 3052 9207 2996 9192

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