Special Weather Statement, NWS Lake Charles, LA

Area Forecast Discussion
National Weather Service Lake Charles LA
326 AM CST Thu Jan 25 2024

...New SHORT TERM, LONG TERM...

.UPDATE...
Issued at 935 PM CST Wed Jan 24 2024

Our long awaited rain event continues this evening as another
round of mainly light rain ahead of an approaching disturbance
aloft shrouds much of the forecast area. Not surprisingly, the 00z
KLCH sounding showed a very moist airmass lingering with a PWAT
value approaching 1.6 inches (nearly a daily max per SPC climo)
while mean RH values were at or slightly less than 90 percent
(which frankly is a bit surprising). In addition, local 88Ds are
showing a cluster of elevated thunderstorms moving across our swrn
coastal zones at this time. Meanwhile, our next round of
potentially heavy precip is showing up on regional 88Ds out over
cntl TX, poised to move into the forecast area during the
overnight hours. All in all, there's really nothing to add to
what's already in the grids/zones, so no updates are planned as
far as precip.

However, latest high res fog guidance indicates the potential for
dense fog development over the far sern zones as a weak sfc low is
progged to develop over the nwrn Gulf through the night, then
track newd...the srly flow ahead of it looks likely to push the
ongoing marine fog nwd into these areas after midnight. Thus, am
planning to issue a Dense Fog Advisory for this small area
shortly. Guidance gets a little wishy washy as far as how far
inland or wwd the fog could go...parishes on the edge of the
advisory area could certainly see deteriorating conditions at
some point overnight and the advisory could be expanded if
necessary.

Elsewhere, remaining grids/zones look in fine shape as is per
recent obs/trends/guidance.

Update out shortly. Stay dry, everyone.
25

&&

.SHORT TERM...
(Today through Saturday night)
Issued at 310 AM CST Thu Jan 25 2024

A subtropical high pressure positioned east of the Bahamas with a
fairly wide shortwave over the central/western CONUS has provided a
frontal boundary acting a as conveyer belt supplying smaller
disturbances along the leading edge of the upper level trough.
Presently, a low pressure trough is shifting east near ARKLATEX
region and a stationary boundary extends from the eastern Great
Lakes SWW across the LA/TX coast. The rather non-uniform shortwave
across the western 2/3rds of the CONUS begins to modify through this
evening with the downstream portion beginning to amply a slight
negative tilt toward TX, thus ushering the boundary west of the CWA
by tonight. In the meantime, appropriate flood hazards and watches
remain in effect. Additional river flooding and ponding on low lying
or flood prone areas will remain possible into Friday and Saturday
as drainage basins to the north work towards the coast. Fog will
remain a hazard that we’ll periodically see into the weekend with
cooler waters near the coast and wet surfaces inland and some
potential WAA toward the coast through Friday night.

Although the hazardous rainfall is expected to shift east by this
evening, as mentioned above, WAA and weak surface troughing attempt
to lift northward along the western Gulf into southern LA/TX. The
stationary boundary will lift from the coast forming a weak surface
low along Eastern LA and SW MS Friday evening. Therefore Isolated to
scattered showers with potential of some thunder can be expected
starting the mid morning Fri. into predawn hours Saturday morning.
Meanwhile, the aforementioned wide shortwave is now expected to
accelerate east toward the western Ohio Valley with a mid- level
trough over SE OK. Both features will attempt to merge during the
course Friday afternoon / night. Hereafter, the sfc low deepens
and also accelerates over the SE CONUS into Sunday morning which
lets the remainder of Saturday dry out west to east with some CAA
from the NW.

Kowalski/30

&&

.LONG TERM...
(Sunday through Thursday)
Issued at 310 AM CST Thu Jan 25 2024

By Sunday, expect much cooler daytime highs with breezy NW flow.
Daytime high temps will be in the upper 50s to around 60 degrees for
the entire area. For the rest of the week, SFC high pressure builds
into the region with a slow warming trend. Daytime highs will
gradually climb a degree or two each day with temps approaching 70
degrees late week. There could be another weather system that moves
throgh the region for the weekend, but confidence is low at this
time.

78

&&

.AVIATION...
(06Z TAFS)
Issued at 1139 PM CST Wed Jan 24 2024

Messy aviation forecast through roughly the next 12 hours as
periods of SHRA will prevail with occasional TS. Radar currently
shows a band of convection crossing SW LA, with activity near
KLCH. Additional bands are noted across S central LA, with
moderate RA across central LA. Further west over SE TX, the next
round of SHRA/TSRA is developing and will be moving east across
the area later tonight. Timing remains similar to previous TAFs
with this last band of convection expected between ~09Z to ~16Z.
VFR cigs held on longer than expected this evening, but IFR/LIFR
cigs are beginning to form and should become widespread over the
next couple of hours, while vsbys will fall to MVFR/IFR during
periods of heavier SHRA. Once the last band of convection moves
through later tonight into Thursday morning, winds will shift
northwest to north, with gradually improving conditions expected
after 18Z Thursday. Some patchy fog could return toward the end of
the TAF period.

24

&&

.MARINE...

Patchy to areas of dense fog will continue for the near shore
waters, lakes, and bays as warm and moist air continues over the
very cold shelf waters. The dense fog is expected to continue
through early Thursday morning. Otherwise, a large upper level
trough over the Western U.S. will send periodic disturbances that
will keep high chances of showers and thunderstorms across the
region through Friday night. The next cold front expected to move
through Saturday morning, bringing an end of the rainfall and
offshore flow for the weekend.

08/DML

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  70  50  68  57 /  90  20  40  80
LCH  70  54  69  58 /  90  30  50  80
LFT  72  60  73  63 /  90  50  70  80
BPT  72  54  70  58 /  60  30  40  70

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...Flood Watch until noon CST today for LAZ027>033-044-045-055-073-
     074-141>143-152>154-241>243-252>254.

     Dense Fog Advisory until 8 AM CST this morning for LAZ055-153-
     154-253-254.

TX...Flood Watch until noon CST today for TXZ180-201-259>262-515-516-
     615-616.

GM...Dense Fog Advisory until 9 AM CST this morning for GMZ430-432-
     450-452.

     Dense Fog Advisory until noon CST today for GMZ435-436-455.

&&

SHORT TERM...30
LONG TERM....78
AVIATION...24

Special Weather Statement
National Weather Service Lake Charles LA
544 AM CST Thu Jan 25 2024

LAZ027-028-031-032-251215-
Evangeline LA-Allen LA-Vernon LA-Rapides LA-
544 AM CST Thu Jan 25 2024

...STRONG THUNDERSTORMS WILL IMPACT RAPIDES...NORTHWESTERN
EVANGELINE...EASTERN VERNON AND NORTHEASTERN ALLEN PARISHES THROUGH
615 AM CST...

At 544 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Clifton to near Pitkin. Movement was east
at 35 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Alexandria, Pineville, Glenmora, Boyce, Cheneyville, Elizabeth,
Alexandria International Airport, Hineston, Lena, Pitkin, Ball,
Lecompte, Tioga, Timber Trails, Esler Regional Airport, Flatwoods,
Otis, Elmer, Kingsville, and Sieper.

This includes Interstate 49 between mile markers 55 and 109.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3149 9270 3150 9268 3147 9269 3145 9271
      3145 9268 3141 9268 3140 9269 3140 9267
      3139 9266 3147 9224 3097 9223 3080 9295
      3136 9302 3135 9295 3137 9295 3137 9292
      3139 9291 3139 9289 3152 9272
TIME...MOT...LOC 1144Z 253DEG 32KT 3134 9288 3089 9291

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Tingler

Special Weather Statement
National Weather Service Lake Charles LA
558 AM CST Thu Jan 25 2024

LAZ031>033-074-142-143-152-241>243-252-251230-
Upper Vermilion LA-Southern Calcasieu LA-Southern Acadia LA-
Lower Vermilion LA-Northern Acadia LA-St. Landry LA-Evangeline LA-
Allen LA-Southern Jefferson Davis LA-Northern Jefferson Davis LA-
East Cameron LA-
558 AM CST Thu Jan 25 2024

...STRONG THUNDERSTORMS WILL IMPACT EASTERN CAMERON...JEFFERSON
DAVIS...EVANGELINE...ACADIA...SOUTHEASTERN CALCASIEU...WESTERN
VERMILION...NORTHWESTERN ST. LANDRY AND EASTERN ALLEN PARISHES
THROUGH 630 AM CST...

At 557 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Oakdale to near Elton to near Grand
Chenier. Movement was east at 45 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Crowley, Eunice, Jennings, Oakdale, Ville Platte, Mamou, Welsh, Lake
Arthur, Kinder, Basile, Oberlin, Iota, Gueydan, Elton, Mermentau,
Turkey Creek, Rockefeller Wildlife Range, Hayes, Lacassine National
Wildlife Refuge, and Pecan Island.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 48 and 86.
 Interstate 49 between mile markers 39 and 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 2958 9262 2974 9307 2977 9307 3086 9276
      3090 9255 3089 9251 3092 9248 3095 9228
      3089 9224 3085 9224 3085 9214 2956 9247
TIME...MOT...LOC 1157Z 253DEG 37KT 3083 9268 3052 9271 2974 9299

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Tingler

Special Weather Statement
National Weather Service Lake Charles LA
624 AM CST Thu Jan 25 2024

LAZ028-029-032-251315-
Avoyelles LA-Evangeline LA-Rapides LA-
624 AM CST Thu Jan 25 2024

...STRONG THUNDERSTORMS WILL IMPACT EASTERN RAPIDES...NORTHEASTERN
EVANGELINE AND AVOYELLES PARISHES THROUGH 715 AM CST...

At 624 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Alexandria to near Pine Prairie. Movement
was east at 40 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Alexandria, Pineville, Marksville, Bunkie, Simmesport, Moreauville,
Cheneyville, Turkey Creek, Bordelonville, Alexandria International
Airport, Effie, Ball, Cottonport, Pine Prairie, Mansura, Lecompte,
Hessmer, Evergreen, Plaucheville, and Bayou Chicot.

This includes Interstate 49 between mile markers 43 and 92.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3147 9216 3141 9215 3136 9208 3133 9208
      3134 9203 3132 9200 3128 9202 3122 9199
      3123 9192 3128 9195 3130 9191 3119 9168
      3114 9172 3105 9172 3097 9181 3087 9180
      3085 9221 3081 9221 3078 9244 3141 9256
TIME...MOT...LOC 1224Z 251DEG 36KT 3128 9251 3075 9236

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Tingler

Special Weather Statement
National Weather Service Lake Charles LA
628 AM CST Thu Jan 25 2024

LAZ032-033-044-045-143-242-243-251315-
Southern Acadia LA-Lafayette LA-Northern Acadia LA-St. Landry LA-
Evangeline LA-Upper St. Martin LA-Southern Jefferson Davis LA-
628 AM CST Thu Jan 25 2024

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN LAFAYETTE...SOUTHEASTERN
EVANGELINE...ACADIA...NORTHWESTERN ST. MARTIN AND ST. LANDRY PARISHES
THROUGH 715 AM CST...

At 628 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Bayou Chicot to Egan. Movement was east at
45 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Lafayette, Opelousas, Crowley, Eunice, Scott, Breaux Bridge, Rayne,
Carencro, Ville Platte, Church Point, Mamou, Iota, Krotz Springs,
Leonville, Arnaudville, Melville, Mermentau, Palmetto, Bayou Current,
and Morrow.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 67 and 121.
 Interstate 49 between mile markers 1 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3026 9174 3013 9265 3020 9263 3019 9259
      3020 9259 3023 9262 3082 9242 3085 9207
      3085 9182 3084 9180 3081 9181 3078 9177
      3074 9176 3070 9173 3067 9173 3061 9176
      3056 9176 3051 9173 3050 9176 3049 9170
TIME...MOT...LOC 1228Z 255DEG 40KT 3087 9232 3023 9252

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Tingler

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