Alert archive / Louisiana / Special Weather Statements in 2018

Special Weather Statement, NWS Lake Charles, LA

July 11, 2018Vernon Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Jul 11, 2018, 6:31 PM CDT for Vernon Parish, Louisiana. It was in force for 29 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 11, 2018, 6:31 PM CDT (23:31 UTC)
Expired: Jul 11, 2018, 7:00 PM CDT
In force: 29 min
Issued by: NWS Lake Charles, LA

County Vernon Parish, LA

The radar

The Ft Polk radar (KPOE), 25 km from the middle of the area, began a volume at 23:33 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

Shreveport, LA (KBAD), launched 12:00Z, 11.5 hours before the alert went out and 142 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: 1494 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 4 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 Jul 11, 6:26 PM CDT, 5 minutes earlier.

Area forecast discussion, Jul 11, 6:26 PM CDT, 5 minutes before

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Hazardous weather outlook, Jul 11, 3:30 PM CDT, 3 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Lake Charles LA
330 PM CDT Wed Jul 11 2018

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
122030-
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-
330 PM CDT Wed Jul 11 2018

This Hazardous Weather Outlook is for portions of central
Louisiana, south central Louisiana, southwest Louisiana, west
central Louisiana, and southeast Texas.

.DAY ONE...This Afternoon and Tonight

Numerous showers and thunderstorms will continue across parts of
coastal South Central Louisiana the rest of the afternoon, with
more isolated activity across the rest of the outlook area.
Additional isolated to scattered activity will be possible through
the night, especially across East and South Central Louisiana.

No severe thunderstorms are expected, but stronger thunderstorms
will be capable of producing frequent lightning, wind gusts to 30
mph, and locally heavy rainfall which could result in minor
flooding of urban or low-lying areas.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Scattered showers and thunderstorms will be possible primarily each
afternoon and early evening for the remainder of the work week and
on into the weekend. No severe thunderstorms are expected, but
brief heavy downpours and occasional dangerous lightning will
again be the main hazards with the storms. Rain chances currently
look to diminish slightly for early next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected.

GMZ430-432-435-450-452-455-470-472-475-122030-
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-
330 PM CDT Wed Jul 11 2018

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

.DAY ONE...This Afternoon and Tonight

Scattered showers and thunderstorms can be expected on the coastal
waters and especially the coastal lakes and bays through tonight,
especially Vermilion Bay and the adjacent nearshore Gulf waters
from Lower Atchafalaya to Intracoastal City. No severe
thunderstorms are expected, but occasional cloud to water
lightning, along with locally higher winds and seas on the coastal
waters, can be expected with the storms.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A daily chance of showers and thunderstorms will continue,
especially over the near shore waters and the coastal lakes and
bays. No severe thunderstorms are expected, but occasional
dangerous lightning, along with locally higher winds and seas, can
be expected with the storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

13

In the hours before

Special weather statement, Jul 11, 5:12 PM CDT, 1 hour 19 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
512 PM CDT WED JUL 11 2018

LAZ027-028-112245-
Vernon LA-Rapides LA-
512 PM CDT WED JUL 11 2018

...SPECIAL WEATHER STATEMENT...

At 512 PM CDT, Doppler radar was tracking a strong thunderstorm near
Flatwoods, or near Lena, moving southwest at 5 mph.

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

Locations impacted include...
Boyce, Lena, Sieper, Hutton, Clifton, Flatwoods and Gardner.

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 3147 9271 3144 9270 3145 9268 3141 9268
      3140 9269 3140 9267 3139 9266 3141 9251
      3116 9281 3135 9306 3137 9303 3135 9295
      3137 9295 3137 9292 3139 9291 3139 9289
      3142 9287 3142 9285 3143 9284 3148 9276
TIME...MOT...LOC 2212Z 048DEG 5KT 3139 9282

24

Special weather statement, Jul 11, 5:52 PM CDT, 39 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
552 PM CDT WED JUL 11 2018

TXZ215-216-112315-
Orange TX-Jefferson TX-
552 PM CDT WED JUL 11 2018

...SPECIAL WEATHER STATEMENT...

At 552 PM CDT, Doppler radar was tracking a strong thunderstorm over
Groves, moving west at 15 mph.

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

Locations impacted include...
Port Arthur, Nederland, Groves and Port Neches.

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 2980 9403 3005 9401 3001 9382 2998 9379
      2999 9381 2998 9383 2999 9385 2999 9386
      2997 9384 2997 9386 2995 9386 2996 9387
      2993 9386 2985 9394 2981 9395
TIME...MOT...LOC 2252Z 084DEG 14KT 2994 9391

24

Local storm report, Jul 11, 5:57 PM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
557 PM CDT WED JUL 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1255 PM     LIGHTNING        BASILE                  30.50N 92.60W
07/11/2018                   EVANGELINE         LA   PUBLIC

            VIDEO SHOWS A HOUSE IN BASILE THAT APPEARS TO HAVE BEEN
            STRUCK BY LIGHTNING AND SUFFERED SIGNIFICANT DAMAGE AS A
            RESULT. TIME ESTIMATED BY RADAR.

&&

SWARTHEN

Special weather statement, Jul 11, 6:18 PM CDT, 13 minutes before

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Special weather statement, Jul 11, 6:20 PM CDT, 11 minutes before

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Special weather statement, Jul 11, 6:31 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 12:17 PM CDT	Special Weather Statement	LCH	Acadia, Allen, Beauregard, Evangeline, Jefferson Davis, Saint Landry	88 min
Jul 11, 1:48 PM CDT	Special Weather Statement	LCH	Acadia, Lafayette	57 min
Jul 11, 2:15 PM CDT	Special Weather Statement	LCH	Saint Martin	60 min
Jul 11, 2:42 PM CDT	Special Weather Statement	LCH	Vermilion	63 min
Jul 11, 3:13 PM CDT	Special Weather Statement	LCH	St. Mary	62 min
Jul 11, 3:28 PM CDT	Areal Flood Advisory	LCH	Iberia, St. Mary	2 hr
Jul 11, 4:56 PM CDT	Special Weather Statement	LCH	Cameron	34 min
Jul 11, 5:12 PM CDT	Special Weather Statement	LCH	Rapides	33 min
Jul 11, 6:18 PM CDT	Special Weather Statement	LCH	Rapides	42 min
Jul 11, 5:52 PM CDT	Special Weather Statement	LCH	Orange	23 min
Jul 11, 6:20 PM CDT	Special Weather Statement	LCH	Jefferson	40 min

Nearby

Special Weather Statements in Louisiana, 2018 Every 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.