Alert archive / Louisiana / Special Weather Statements in 2017

Special Weather Statement, NWS Lake Charles, LA

March 30, 2017Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Mar 30, 2017, 2:40 AM CDT for Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana. It was in force for 50 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 30, 2017, 2:40 AM CDT (07:40 UTC)
Expired: Mar 30, 2017, 3:30 AM CDT
In force: 50 min
Issued by: NWS Lake Charles, LA

Counties Iberia Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA

The radar

The Lake Charles radar (KLCH), 144 km from the middle of the area, began a volume at 07:41 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, 7.7 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: 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.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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, 11:24 PM CDT, 3 hours 16 minutes earlier.

Area forecast discussion, Mar 29, 11:24 PM CDT, 3 hours 16 minutes before

Area Forecast Discussion
National Weather Service Lake Charles LA
1124 PM CDT Wed Mar 29 2017

.UPDATE...
Have updated and lowered pops but still will continue the TOR
Watch until actvty moves out of area.

&&

.PREV DISCUSSION... /issued 1017 PM CDT Wed Mar 29 2017/

UPDATE...
Storm actvty has ended across se TX this eve. Storms have weaken
ovr srn LA but this is xpcd to be shorted lived w/ redevelopment
xpcd ovrnght. Meanwhile storms cont to train into srn La and this
actvty is xpcd to cont thru the next svrl hrs. A Flash Flood
Warning has been posted. Trying to clear actvty for TOR Watch but
with actvty contg will wait till this has completed its course.

PREV DISCUSSION... /issued 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 /  20  20  10   0
LCH  65  77  58  82 /  50  20  10   0
LFT  71  80  58  85 / 100  40  10   0
BPT  62  79  58  84 /  20  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.

&&

PUBLIC...19

Hazardous weather outlook, Mar 29, 6:18 AM CDT, 20 hours 22 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

Local storm report, Mar 29, 11:43 PM CDT, 2 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1143 PM CDT WED MAR 29 2017

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

0830 PM     HAIL             BRANCH                  30.35N 92.27W
03/29/2017  E1.00 INCH       ACADIA             LA   PUBLIC

&&

K. KUYPER

Special weather statement, Mar 30, 12:19 AM CDT, 2 hours 21 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
1219 AM CDT THU MAR 30 2017

LAZ052-074-300615-
Vermilion LA-East Cameron LA-
1219 AM CDT THU MAR 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CAMERON AND NORTHWESTERN
VERMILION PARISHES UNTIL 115 AM CDT...

At 1218 AM CDT, Doppler radar was tracking a strong thunderstorm near
Grand Chenier, moving northeast at 25 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
Grand Chenier, Klondike, Rockefeller Wildlife Range and Florence
Landing.

A tornado watch remains in effect until 300 AM CDT for southwestern
Louisiana.

LAT...LON 2966 9284 2975 9303 2975 9301 2976 9303
      3007 9264 3010 9261 2984 9237 2960 9269
TIME...MOT...LOC 0518Z 232DEG 22KT 2969 9291

Jones

Special weather statement, Mar 30, 12:32 AM CDT, 2 hours 8 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
1232 AM CDT THU MAR 30 2017

LAZ053-054-300615-
Iberia LA-St. Mary LA-
1232 AM CDT THU MAR 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN IBERIA AND
NORTHWESTERN ST. MARY PARISHES UNTIL 115 AM CDT...

At 1232 AM CDT, Doppler radar was tracking a strong thunderstorm near
Cypremort Point, moving northeast at 25 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
New Iberia, Jeanerette, Avery Island, Cypremort Point, Loreauville,
Sorrel, Lydia, Lake Fausse Pointe and Weeks Island.

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

LAT...LON 2994 9149 2971 9187 2971 9188 2974 9186
      2976 9188 2980 9185 2978 9185 2978 9183
      2982 9182 2984 9190 2981 9192 2981 9194
      2982 9196 2986 9198 2991 9198 3012 9173
      3011 9166 3004 9160
TIME...MOT...LOC 0532Z 232DEG 21KT 2979 9193

Jones

Special weather statement, Mar 30, 1:17 AM CDT, 1 hour 23 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
117 AM CDT THU MAR 30 2017

LAZ052-074-300700-
Vermilion LA-East Cameron LA-
117 AM CDT THU MAR 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CAMERON AND CENTRAL
VERMILION PARISHES UNTIL 200 AM CDT...

At 117 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles southwest of Wright to 6 miles
southwest of Pecan Island. Movement was northeast at 25 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Kaplan, Forked Island, Pecan Island, Freshwater City, Wright and
Florence Landing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
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 southwestern
Louisiana.

LAT...LON 2955 9239 2958 9262 2960 9269 2997 9257
      3009 9226 2954 9226 2953 9231
TIME...MOT...LOC 0617Z 237DEG 22KT 2991 9251 2959 9254

Tingler

Special weather statement, Mar 30, 2:05 AM CDT, 35 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
205 AM CDT THU MAR 30 2017

LAZ052-053-300745-
Iberia LA-Vermilion LA-
205 AM CDT THU MAR 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL IBERIA AND EAST
CENTRAL VERMILION PARISHES UNTIL 245 AM CDT...

At 204 AM CDT, Doppler radar was tracking a strong thunderstorm over
Intracoastal City, moving northeast at 45 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Abbeville, Avery Island, Intracoastal City, Erath, Delcambre, Esther,
Jefferson Island, Henry and Weeks Island.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
and southwestern Louisiana.

LAT...LON 2983 9229 3006 9196 2982 9178 2980 9182
      2981 9182 2983 9183 2984 9190 2981 9194
      2983 9197 2980 9198 2972 9215 2975 9213
      2977 9215 2976 9218 2974 9217 2975 9221
      2973 9220 2970 9215 2968 9219
TIME...MOT...LOC 0704Z 236DEG 39KT 2980 9216

Tingler

Special weather statement, Mar 30, 2:40 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
240 AM CDT THU MAR 30 2017

LAZ045-052>055-300830-
Lower St. Martin LA-Iberia LA-Vermilion LA-Upper St. Martin LA-
St. Mary LA-
240 AM CDT THU MAR 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR IBERIA...ST. MARY...SOUTHEASTERN
VERMILION AND SOUTHERN ST. MARTIN PARISHES UNTIL 330 AM CDT...

At 240 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Lydia to 14 miles southeast of
Intracoastal City. Movement was northeast at 35 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
New Iberia, Franklin, Jeanerette, Cypremort Point, Avery Island,
Baldwin, Loreauville, Ellerslie, Glencoe, Lydia, Sorrel, Cote Blanche
Island, Lake Fausse Pointe, Charenton, Weeks Island and Centerville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

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

LAT...LON 2954 9147 2964 9157 2959 9175 2975 9160
      2976 9162 2971 9185 2954 9173 2952 9199
      2983 9183 2984 9190 2972 9214 2961 9210
      2961 9203 2953 9230 2954 9230 3001 9191
      3018 9147 3004 9122
TIME...MOT...LOC 0740Z 236DEG 30KT 2990 9183 2960 9205

Tingler

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, 7:42 PM CDT	Special Weather Statement	LCH	Acadia	48 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, 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.