Alert archive / Louisiana / Special Weather Statements in 2017

Special Weather Statement, NWS Lake Charles, LA

March 29, 2017Acadia Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Mar 29, 2017, 7:42 PM CDT for Acadia Parish, Louisiana. It was in force for 48 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: Mar 29, 2017, 7:42 PM CDT (00:42 UTC)
Expired: Mar 29, 2017, 8:30 PM CDT
In force: 48 min
Issued by: NWS Lake Charles, LA

County Acadia Parish, LA

The radar

The Lake Charles radar (KLCH), 78 km from the middle of the area, began a volume at 00:46 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 00:00Z, 0.7 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-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: 1539 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 662 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 4.5

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 Mar 29, 6:47 PM CDT, 55 minutes earlier.

Area forecast discussion, Mar 29, 6:47 PM CDT, 55 minutes before

Area Forecast Discussion
National Weather Service Lake Charles LA
647 PM CDT Wed Mar 29 2017

.AVIATION...
Storms this evening continue to effect TAF locations this activity
is expected to continue through the next several hours. Storms are
moving to the northeast.

&&

.PREV DISCUSSION... /issued 506 PM CDT Wed Mar 29 2017/

UPDATE...
As coordination with SPC, have areal extended the Tornado Watch 98
into Rapides Parish, as convection may enter that area a little
sooner.

Rua

PREV DISCUSSION... /issued 422 PM CDT Wed Mar 29 2017/

.SEVERE WEATHER POTENTIAL THROUGH THE EVENING INTO OVERNIGHT...
.HEAVY RAINFALL AND SEVERE POTENTIAL AGAIN OVER THE WEEKEND...

SYNOPSIS...
Will be brief as severe weather ongoing in the forecast area.
Tornado Watch is in effect until 9 pm for a majority of the
western portion of the forecast area. Enhanced Risk for Severe
Storms into the evening and overnight period.

Rua

DISCUSSION...
A vigorous storm system will be moving across the southern
plains tonight into early Thursday. Jet streak and strong positive
vorticity will be rounding the upper level system and across the
forecast for the evening into the overnight hours. Meanwhile,
strong low level jet and abundant gulf moisture will be in place.
Therefore, supercell clusters of thunderstorms will continue for
the remainder of the afternoon, possibly consolidating into a
squall line later this evening and overnight. All forms of severe
weather will be possible. Strong wind damage and large hail, with
a few tornadoes, as cells should have good rotation from the
elevated shear.

Dry slot should move in during the overnight hours quickly
tapering off activity by the morning hours.

A couple of fair weather days, until the next storm system
organizes and moves through the region. Looks like main event will
be late Sunday into early Monday, with heavy rainfall and severe
weather potential. However, GFS does show a lead short wave moving
across late Saturday and Saturday Night, that the ECMWF does not
pick up on. At this point will just have chance pops for that time
period before likely pops on late Sunday into Sunday Night.

Rua

MARINE...
Strong south winds will begin to decrease later tonight as the low
pressure system begins to depart the region and pressure gradient
relaxes.

Rua

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  66  77  54  84 /  70  30  10   0
LCH  65  77  58  82 /  80  20  10   0
LFT  71  80  58  85 /  70  50  10   0
BPT  62  79  58  84 /  70  20  10   0

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...None.
TX...None.
GM...Small Craft Advisory until 1 AM CDT Thursday for GMZ450-452-455-
     470-472-475.

     Small Craft Advisory until 10 PM CDT this evening for GMZ430-432-
     435.

&&

AVIATION...19

Hazardous weather outlook, Mar 29, 6:18 AM CDT, 13 hours 24 minutes before

Hazardous Weather Outlook
National Weather Service Lake Charles LA
618 AM CDT Wed Mar 29 2017

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
301130-
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-
618 AM CDT Wed Mar 29 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

There is a slight to enhanced risk of severe thunderstorms today
and tonight. While uncertainty exists with the exact timing and
evolution, scattered to numerous thunderstorms are expected to
develop or spread into East Texas this afternoon, with activity
continuing to spread east into Louisiana tonight. All modes of
severe weather are possible, which includes tornadoes, damaging
winds, and large hail.

South winds are forecast to increase and become gusty this
afternoon across areas generally along and south of I-10 and over
parts of East Central Louisiana. A wind Advisory is in effect for
these areas from noon through 6 pm, and may need to be extended
further in time for areas near the coast.

Another upper level storm system will affect the region Saturday
night through Sunday night. Considerable variability is present
in model guidance at this time, but it appears that at least some
severe weather and/or locally heavy rainfall risk will accompany
this system as well.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thunderstorms are expected to continue over East Central and
South Central Louisiana early Thursday morning before pushing
across the Atchafalaya River as a cold front sweeps through the
area. Severe weather will continue to be possible with this
activity.

Another upper level storm system will affect the region Saturday
night through Sunday night. Considerable variability is present
in model guidance at this time, but it appears that at least some
severe weather and/or locally heavy rainfall risk will accompany
this system as well.

.SPOTTER INFORMATION STATEMENT...

Storm spotter activation may be needed later today and tonight.

GMZ430-432-435-450-452-455-470-472-475-301130-
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-
618 AM CDT Wed Mar 29 2017

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

.DAY ONE...Today and Tonight

Gusty south winds and rough seas are expected to continue today,
and small craft advisories are in effect today and into this
evening. Winds are expected to gradually subside from west to east
tonight.  In addition, an upper level storm system crossing the
region will bring a risk of severe thunderstorms this afternoon
and tonight. All modes of severe weather will be possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thunderstorms are expected to continue over the Gulf waters into
Thursday morning, pushing east of the area by afternoon as a cold
front sweeps through the area. Severe weather will continue to be
possible with this activity.

Another upper level storm system will affect the region Saturday
night through Monday. Considerable variability is present in
model guidance at this time, but it appears that at least some
severe weather and/or locally heavy rainfall risk will accompany
this system as well.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

13

In the hours before

Special weather statement, Mar 29, 6:17 PM CDT, 1 hour 25 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
617 PM CDT WED MAR 29 2017

LAZ041-073-074-TXZ216-300000-
West Cameron-Calcasieu-East Cameron-Orange-
617 PM CDT WED MAR 29 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN CAMERON...
CALCASIEU PARISHES IN SOUTHWESTERN LOUISIANA AND NORTHEASTERN ORANGE
COUNTIES...

At 617 PM CDT, radar indicated strong thunderstorms were located
along a line extending from near Starks to 7 miles north of Sabine
National Wildlife. Movement was east at 35 mph.

Winds in excess of 40 mph are possible with these storms.

Locations impacted include...
Lake Charles, Sulphur, Westlake, Vinton, Grand Lake, Starks,
Hackberry, Carlyss, Lunita, Buhler, Heberts Marina and Edgerly.

Torrential rainfall is also occurring with these storms, and may
cause 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 2997 9327 3002 9327 3005 9329 3005 9333
      2994 9334 2995 9375 3024 9375 3024 9371
      3029 9371 3030 9374 3035 9375 3040 9335
      3040 9322 2994 9323 2994 9325
TIME...MOT...LOC 2317Z 252DEG 29KT 3031 9361 3000 9362

TWH

Local storm report, Mar 29, 6:25 PM CDT, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
625 PM CDT WED MAR 29 2017

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

0600 PM     MARINE TSTM WIND 3 SW CAMERON            29.77N 93.34W
03/29/2017  M40 MPH          CAMERON            LA   C-MAN STATION

&&

MOGGED

Local storm report, Mar 29, 6:27 PM CDT, 1 hour 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
627 PM CDT WED MAR 29 2017

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

0520 PM     HAIL             PORT ACRES              29.90N 94.03W
03/29/2017  E1.00 INCH       JEFFERSON          TX   PUBLIC

&&

K. KUYPER

Local storm report, Mar 29, 6:36 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
636 PM CDT WED MAR 29 2017

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

0635 PM     HAIL             4 E CAMERON             29.79N 93.23W
03/29/2017  E1.75 INCH       CAMERON            LA   PUBLIC

&&

K. KUYPER

Special weather statement, Mar 29, 7:03 PM CDT, 39 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
703 PM CDT WED MAR 29 2017

LAZ028-030>032-041>043-300100-
Calcasieu-Acadia-Jefferson Davis-Evangeline-Allen-Beauregard-Rapides-
703 PM CDT WED MAR 29 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN RAPIDES...
NORTHERN JEFFERSON DAVIS...SOUTHEASTERN BEAUREGARD...SOUTHWESTERN
EVANGELINE...NORTHWESTERN ACADIA...EASTERN CALCASIEU AND ALLEN
PARISHES...

At 703 PM CDT, radar indicated strong thunderstorms were located
along a line extending from near Longville to Lake Charles Regional
Airport. Movement was northeast at 45 mph.

Winds in excess of 40 mph and pea size hail are possible with these
storms.

Locations impacted include...
Lake Charles, Oakdale, Westlake, Welsh, Iowa, Kinder, Basile,
Oberlin, Elton, Fenton, Reeves, Dry Creek, Moss Bluff, Ragley,
Mittie, Lake Charles Regional Airport, Topsy, Lebleu Settlement,
Gillis and Allen Parish Airport.

Torrential rainfall is also occurring with these storms, and may
cause 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 3099 9254 3032 9256 3010 9330 3035 9331
      3053 9338
TIME...MOT...LOC 0003Z 237DEG 38KT 3060 9319 3014 9321

TWH

Special weather statement, Mar 29, 7:42 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
742 PM CDT WED MAR 29 2017

LAZ042>044-300130-
Acadia LA-Jefferson Davis LA-Lafayette LA-
742 PM CDT WED MAR 29 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LAFAYETTE...
SOUTHEASTERN JEFFERSON DAVIS AND ACADIA PARISHES UNTIL 830 PM CDT...

At 742 PM CDT, Doppler radar was tracking a strong thunderstorm over
Jennings, moving northeast at 35 mph.

Nickel size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Lafayette, Crowley, Eunice, Jennings, Rayne, Church Point, Welsh,
Lake Arthur, Iota, Mermentau, Evangeline, Duson, Mowata, Maxie, Mire,
Egan, Branch, Richard, Estherwood and Roanoke.

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.

&&

A tornado watch remains in effect until 300 AM CDT for south central,
central and southwestern Louisiana.

LAT...LON 3022 9287 3032 9256 3047 9255 3048 9225
      3044 9225 3044 9222 3038 9217 3035 9218
      3035 9216 3030 9214 3031 9212 3025 9207
      3011 9254 3012 9256 3010 9258 3009 9263
      3008 9263 3006 9269
TIME...MOT...LOC 0042Z 241DEG 32KT 3019 9265

Jones

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 7:00 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Calcasieu, Cameron, Jefferson Davis	45 min
Mar 29, 7:03 PM CDT	Special Weather Statement	LCH	Allen, Jefferson Davis	57 min
Mar 29, 7:53 PM CDT	Flash Flood Warning	LCH	Calcasieu, Cameron, Jefferson Davis	6 hr
Mar 29, 8:00 PM CDT	Tornado Warning	LCH	Acadia, Jefferson Davis	30 min
Mar 29, 8:20 PM CDT	Special Weather Statement	LCH	Acadia, Lafayette, Saint Landry	40 min
Mar 29, 8:27 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Evangeline, Lafayette, Saint Landry	48 min
Mar 29, 8:27 PM CDT	Tornado Warning	LCH	Allen, Evangeline, Rapides	12 min
Mar 29, 8:50 PM CDT	Severe Thunderstorm Warning	LCH	Iberia, Lafayette, Saint Landry, Saint Martin, St. Mary, Vermilion	40 min
Mar 29, 9:23 PM CDT	Special Weather Statement	LCH	Calcasieu	52 min
Mar 29, 9:25 PM CDT	Special Weather Statement	LCH	Acadia	35 min
Mar 29, 9:28 PM CDT	Special Weather Statement	LCH	Vermilion	32 min
Mar 29, 9:30 PM CDT	Special Weather Statement	LCH	Saint Martin	30 min
Mar 29, 9:44 PM CDT	Areal Flood Advisory	LCH	Acadia, Evangeline, Jefferson Davis, Saint Landry	3 hr
Mar 29, 9:56 PM CDT	Special Weather Statement	LCH	Saint Martin	49 min
Mar 29, 10:30 PM CDT	Flash Flood Warning	LCH	Acadia, Allen, Evangeline, Jefferson Davis, Saint Landry	6 hr
Mar 29, 10:43 PM CDT	Special Weather Statement	LCH	Saint Martin	47 min
Mar 29, 11:25 PM CDT	Special Weather Statement	LCH	Saint Martin	65 min
Mar 30, 12:19 AM CDT	Special Weather Statement	LCH	Vermilion	56 min
Mar 30, 12:26 AM CDT	Special Marine Warning	LCH		49 min
Mar 30, 12:31 AM CDT	Severe Thunderstorm Warning	LCH	Cameron, Vermilion	44 min
Mar 30, 12:32 AM CDT	Special Weather Statement	LCH	Saint Martin	43 min
Mar 30, 1:14 AM CDT	Special Marine Warning	LCH		61 min
Mar 30, 1:17 AM CDT	Special Weather Statement	LCH	Vermilion	43 min
Mar 30, 1:42 AM CDT	Flash Flood Warning	LCH	Saint Landry	5 hr
Mar 30, 1:45 AM CDT	Areal Flood Advisory	LCH	Lafayette, Saint Martin	4 hr
Mar 30, 1:55 AM CDT	Areal Flood Warning	LCH	Calcasieu, Jefferson Davis	6 hr
Mar 30, 2:05 AM CDT	Special Weather Statement	LCH	Vermilion	40 min
Mar 30, 2:10 AM CDT	Special Marine Warning	LCH		65 min
Mar 30, 2:20 AM CDT	River Flood Warning	LCH	Calcasieu	16 days
Mar 30, 2:40 AM CDT	Special Weather Statement	LCH	Iberia, Saint Martin, St. Mary	50 min
Mar 30, 3:10 AM CDT	Special Marine Warning	LCH		95 min
Mar 30, 3:20 AM CDT	Areal Flood Advisory	LCH	Iberia, Saint Martin, St. Mary	3 hr
Mar 30, 4:31 AM CDT	Areal Flood Warning	LCH	Acadia, Allen, Evangeline, Jefferson Davis, Saint Landry	6 hr
Mar 30, 4:45 AM CDT	Special Weather Statement	LCH	Assumption	45 min
Mar 30, 4:55 AM CDT	River Flood Warning	LCH	Acadia, Evangeline, Saint Landry	7 days
Mar 30, 5:16 AM CDT	River Flood Warning	LCH	Calcasieu	29 hr
Mar 30, 6:06 AM CDT	Special Marine Warning	LCH		84 min
Mar 30, 6:18 AM CDT	Special Weather Statement	LCH	St. Mary	42 min
Mar 30, 6:21 AM CDT	Areal Flood Advisory	LCH	Iberia, Saint Martin, St. Mary	114 min
Mar 30, 6:29 AM CDT	Severe Thunderstorm Warning	LCH	St. Mary	27 min
Mar 30, 9:12 AM CDT	Areal Flood Advisory	LCH	Iberia, Saint Martin, St. Mary, Vermilion	3 hr
Mar 30, 10:06 AM CDT	River Flood Warning	LCH	Calcasieu	34 hr

Nearby

Special Weather Statements in Louisiana, 2017 Every special weather statement in 2017

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.