Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Lake Charles, LA

August 11, 2021Beauregard Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Aug 11, 2021, 2:36 PM CDT for Beauregard Parish, Louisiana. It was in force for 24 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: Aug 11, 2021, 2:36 PM CDT (19:36 UTC)
Expired: Aug 11, 2021, 3:00 PM CDT
In force: 24 min
Issued by: NWS Lake Charles, LA
Hail: 0.00 in
Wind: 30

County Beauregard Parish, LA

The radar

The Ft Polk radar (KPOE), 44 km from the middle of the area, began a volume at 19:38 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.6 hours before the alert went out and 74 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: 3222 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 742 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: -42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 11, 1:02 PM CDT, 1 hour 34 minutes earlier.

Area forecast discussion, Aug 11, 1:02 PM CDT, 1 hour 34 minutes before

Area Forecast Discussion
National Weather Service Lake Charles LA
102 PM CDT Wed Aug 11 2021

.DISCUSSION...
For 18z TAF issuance.

&&

.AVIATION...
At this time, forecast soundings/time-height sections indicate VFR
conditions will generally prevail through the period...main
exceptions will be within thunderstorm activity which remains
possible, especially lower Acadiana, through the afternoon hours.
Per the usual, convection will die off towards sunset with loss of
heating. Some lower clouds will be possible overnight, but not
expected enough coverage to warrant ceilings. Likewise any
terminals which receives rain this afternoon could see brief
restrictions to visibility around sunrise. Winds will remain
light with high pressure ridging over the area.

25

&&

.PREV DISCUSSION... /issued 1100 AM CDT Wed Aug 11 2021/

DISCUSSION...
Latest radar trends indicate scattered convection over the
adjacent Gulf waters, mainly off the s-cntl LA coast, but better
coverage is noted farther upstream off the sern LA/srn MS coasts
in connection with an approaching erly wave. As weak lift pushes
over the area through the afternoon, along with likely sea breeze
development, expect to see additional coverage of showers/storms
develop, although with the 12z KLCH sounding coming in a little
drier than previous days', coverage may be a little tempered.

Other big question mark for the day is the heat. Obs over the last
few hours have shown temps/dewpoints fairly on point with
inherited grids which lead to max temps in the mid 90s inland
(perhaps a few spots touching the upper 90s during max heating)
with lower 90s srn 1/2. Apparent temps for the bulk of the
forecast area top out at or just below heat advisory criteria of
108F - main area of concern is again the nern zones (primarily
Avoyelles Parish) where apparent temps reach 110F for an hour or
so.

25

PREV DISCUSSION... /issued 620 AM CDT Wed Aug 11 2021/

AVIATION...
Isolated showers over the gulf are moving onshore into southeast
Texas and southern Louisiana. These storms will continue to
fall apart through the late morning hours before getting support
by daytime heating with showers and thunderstorms during the
afternoon hours down along the I-10 corridor. Storms ending
towards sunset.

PREV DISCUSSION... /issued 259 AM CDT Wed Aug 11 2021/

DISCUSSION...
A few showers seen on radar in the coastal waters this morning.
This activity will continue, and move near the coastal sections of
southwest Louisiana by sunrise.

Activity will increase in coverage later this afternoon, with the
best coverage in Louisiana, and less coverage in Texas. No severe
storms expected, but you will see some lightning and gusty winds
in the stronger storms.

This pattern continues for much of the next 7 days, with daily
showers and thunderstorms, starting in the coastal waters early
in the morning, and working their way inland through the morning,
moving north of the I-10 corridor by midday, before dissipating by
early evening.

High temperatures will be near normal, in the low to mid 90s. Max
heat indices in the afternoon will be in the 102-107 F range,
just below heat advisory criteria. Be sure to minimize how much
time you are in the heat, take plenty of breaks, drink plenty of
water.

As for the tropics, Tropical Storm Fred could be in the eastern
Gulf of Mexico this weekend, but poses no threat to our region.

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  97  75  96  75 /  20  10  30   0
LCH  93  76  93  77 /  50  10  50  10
LFT  94  76  94  76 /  50  10  50  10
BPT  94  77  93  76 /  20  10  40  10

&&

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

Hazardous weather outlook, Aug 11, 5:30 AM CDT, 9 hours 6 minutes before

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In the hours before

Special weather statement, Aug 11, 12:45 PM CDT, 1 hour 51 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
1245 PM CDT Wed Aug 11 2021

LAZ044-045-052-053-111830-
Iberia LA-Lafayette LA-Vermilion LA-Upper St. Martin LA-
1245 PM CDT Wed Aug 11 2021

...A strong thunderstorm will impact portions of northwestern Iberia,
southeastern Lafayette, northeastern Vermilion and west central St.
Martin Parishes through 130 PM CDT...

At 1245 PM CDT, Doppler radar was tracking a strong thunderstorm near
New Iberia, moving northwest at 5 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
New Iberia, Abbeville, St. Martinville, Avery Island, Broussard,
Youngsville, Erath, Delcambre, Cade, Lydia, Acadiana Regional
Airport, Jefferson Island, Coteau and Milton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2984 9193 2985 9194 2993 9209 2999 9215
      3007 9219 3017 9185 2995 9169 2987 9179
      2984 9191 2985 9192 2984 9192
TIME...MOT...LOC 1745Z 146DEG 4KT 2996 9187

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

Warthen

Special weather statement, Aug 11, 1:54 PM CDT, 42 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
154 PM CDT Wed Aug 11 2021

LAZ030-031-042-111945-
Jefferson Davis LA-Allen LA-Beauregard LA-
154 PM CDT Wed Aug 11 2021

...A strong thunderstorm will impact portions of northwestern
Jefferson Davis, southeastern Beauregard and southwestern Allen
Parishes through 245 PM CDT...

At 154 PM CDT, Doppler radar was tracking a strong thunderstorm over
Reeves, moving north at 10 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Reeves, Leblanc and Harmony.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3040 9295 3044 9314 3069 9318 3060 9284
TIME...MOT...LOC 1854Z 193DEG 7KT 3049 9301

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

Warthen

Special weather statement, Aug 11, 2:36 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
236 PM CDT Wed Aug 11 2021

LAZ027-030-112000-
Beauregard LA-Vernon LA-
236 PM CDT Wed Aug 11 2021

...A strong thunderstorm will impact portions of northeastern
Beauregard and south central Vernon Parishes through 300 PM CDT...

At 236 PM CDT, Doppler radar was tracking a strong thunderstorm near
Tulla, or 9 miles southeast of De Ridder, moving north at 10 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
De Ridder, Rosepine, Tulla and Bundick Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3070 9308 3070 9324 3077 9328 3093 9330
      3093 9302 3078 9304
TIME...MOT...LOC 1936Z 179DEG 9KT 3078 9316

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

Warthen

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 12:45 PM CDT	Special Weather Statement	LCH	Lafayette	45 min
Aug 11, 1:54 PM CDT	Special Weather Statement	LCH	Allen	51 min
Aug 11, 3:00 PM CDT	Special Weather Statement	LCH	St. Mary	45 min
Aug 11, 3:22 PM CDT	Special Weather Statement	LCH	Saint Landry	23 min
Aug 11, 3:44 PM CDT	Special Weather Statement	LCH	Saint Martin	31 min
Aug 11, 4:17 PM CDT	Special Weather Statement	LCH	Saint Martin, St. Mary	28 min
Aug 11, 4:44 PM CDT	Special Weather Statement	LCH	Lafayette	31 min

Nearby

Special Weather Statements in Louisiana, 2021 Every special weather statement in 2021

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.