Alert archive / Louisiana / Special Weather Statements in 2018

Special Weather Statement, NWS Lake Charles, LA

July 5, 2018Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Jul 5, 2018, 3:05 PM CDT for Vermilion Parish, Louisiana. It was in force for 40 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
Jul 5, 2018, 3:05 PM CDT (20:05 UTC)
Expired
Jul 5, 2018, 3:45 PM CDT
In force
40 min
Issued by
NWS Lake Charles, LA

County Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 78 km from the middle of the area, began a volume at 20:08 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, 8.1 hours before the alert went out and 76 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 12:00Z on 2018-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 480 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 12:00Z on 2018-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.193958Sfc1 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
480 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
1069 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
23 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.4

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 Jul 5, 3:00 PM CDT, 5 minutes earlier.

Area forecast discussion, Jul 5, 3:00 PM CDT, 5 minutes before
Area Forecast Discussion
National Weather Service Lake Charles LA
300 PM CDT Thu Jul 5 2018

.DISCUSSION...
Wx map shows mid to upper level low just off the SE LA coast
continuing to move west over the region this afternoon. Temperatures
have continued to increase higher than all guidance has indicated,
now 95 at AEX & LCH, with lower/mid 90s elsewhere. Radar showing
scattered to numerous showers and thunderstorms over the coastal
waters and inland across South Louisiana this afternoon. Activity
expected to increase further later this afternoon and early
evening. SPC continues marginal risk of severe thunderstorms over
the region for thunderstorms with the possibility of wet microbursts
this afternoon and evening. Forecast has 60-70% chances this
afternoon with gusty wind wording. Showers and thunderstorms
expeted to diminish after sunset with the loss of daytime heating.

Friday expected to see slightly lower precipitation chances, but
still above normal as moisture and instability continues. By
Saturday, a weak frontal boundary approaching from the north and
stall, coupled with the high levels of moisture already in place,
will increase the chances of showers and thunderstorms for
Saturday through Monday. For Tuesday/Wednesday time frame, still
expecting near to above normal chances of afternoon showers and
thunderstorms as the series of disturbances aloft move west
across the northern Gulf of Mexico and adjacent coastal areas.

DML

&&

.MARINE...
Light east to northeast winds can be expected through Friday,
with seas running from one to two feet. Winds will be generally
light and variable through the weekend, gradually transitioning
more onshore early next week. Scattered to sometimes numerous
showers and thunderstorms can be expected for the next several
days as a series of disturbances aloft move west across the
northern Gulf of Mexico and adjacent coastal areas. Winds and seas
will be higher near the storms, along with occasional cloud to
water lightning.

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  72  93  72  89 /  50  30  30  70
LCH  73  89  73  88 /  60  50  30  70
LFT  72  90  73  89 /  40  50  30  70
BPT  75  89  75  88 /  60  40  30  60

&&

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

PUBLIC...08
Hazardous weather outlook, Jul 5, 5:21 AM CDT, 9 hours 44 minutes before
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In the hours before

Special weather statement, Jul 5, 3:05 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Lake Charles LA
305 PM CDT THU JUL 5 2018

LAZ052-074-052045-
Vermilion LA-East Cameron LA-
305 PM CDT THU JUL 5 2018

...SPECIAL WEATHER STATEMENT...

At 305 PM CDT, Doppler radar was tracking a strong thunderstorm over
Forked Island, moving west at 15 mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Kaplan, Gueydan, Rockefeller Wildlife Range, Freshwater City, Forked
Island, Pecan Island, Klondike, Wright and Florence Landing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 2958 9262 2964 9280 3004 9276 3002 9222
      2953 9229
TIME...MOT...LOC 2005Z 091DEG 12KT 2982 9234

Jones

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 7:13 PM CDTSpecial Weather StatementLCHEvangeline32 min
Jul 5, 12:46 PM CDTSpecial Marine WarningLCH59 min
Jul 5, 2:28 PM CDTSpecial Marine WarningLCH47 min
Jul 5, 3:33 PM CDTSpecial Marine WarningLCH42 min
Jul 5, 3:39 PM CDTSpecial Weather StatementLCHCameron51 min
Jul 5, 3:56 PM CDTSpecial Marine WarningLCH64 min
Jul 5, 4:23 PM CDTSpecial Weather StatementLCHLafayette52 min
Jul 5, 4:32 PM CDTSpecial Weather StatementLCHCalcasieu28 min
Jul 5, 4:51 PM CDTSpecial Marine WarningLCH54 min
Jul 5, 4:56 PM CDTSpecial Weather StatementLCHEvangeline34 min
Jul 5, 5:09 PM CDTSpecial Weather StatementLCHAcadia36 min
Jul 5, 5:23 PM CDTSpecial Weather StatementLCHAllen52 min
Jul 5, 5:41 PM CDTSpecial Marine WarningLCH64 min
Jul 5, 6:10 PM CDTSpecial Weather StatementLCHAllen, Beauregard50 min
Jul 5, 4:54 PM CDTSpecial Weather StatementLCHOrange36 min
Jul 5, 5:22 PM CDTSpecial Weather StatementLCHOrange23 min
Jul 5, 6:04 PM CDTSpecial Weather StatementLCHJefferson41 min
Jul 5, 6:43 PM CDTSpecial Weather StatementLCHJefferson32 min

Nearby

Special Weather Statements in Louisiana, 2018Every special weather statement in 2018

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.