Alert archive / Louisiana / Special Weather Statements in 2017

Special Weather Statement, NWS Lake Charles, LA

March 1, 2017Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Mar 1, 2017, 2:13 PM CST for Avoyelles Parish, Louisiana. It was in force for 32 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 1, 2017, 2:13 PM CST (20:13 UTC)
Expired
Mar 1, 2017, 2:45 PM CST
In force
32 min
Issued by
NWS Lake Charles, LA

County Avoyelles Parish, LA

The radar

The Ft Polk radar (KPOE), 107 km from the middle of the area, began a volume at 20:16 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, 8.2 hours before the alert went out and 175 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 2017-03-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 369 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 2017-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 189 square meters per square second.1939587897Sfc1 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
369 J/kg
Mixed-layer CIN
-202 J/kg
Mixed-layer LCL
706 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
189 m²/s²
0-3 km storm-relative helicity
167 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

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 1, 11:37 AM CST, 2 hours 36 minutes earlier.

Area forecast discussion, Mar 1, 11:37 AM CST, 2 hours 36 minutes before
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</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.
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        Please try again in a few minutes.
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Hazardous weather outlook, Mar 1, 5:11 AM CST, 9 hours 2 minutes before
Hazardous Weather Outlook
National Weather Service Lake Charles LA
511 AM CST Wed Mar 1 2017

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
021115-
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-
511 AM CST Wed Mar 1 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

Scattered showers and thunderstorms can be expected today as a
cold front moves through the area. A few strong storms will be
possible, and there is a marginal risk for severe storms mainly
north of a Fort Polk to Marksville line. The primary threats will
be strong, possibly damaging, winds and hail.

Showers and storms will end by early this evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A chance for showers and thunderstorms will return Sunday into
Monday. Occasional cloud to ground lightning will accompany the
storms but severe weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

GMZ430-432-435-450-452-455-470-472-475-021115-
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-
511 AM CST Wed Mar 1 2017

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

.DAY ONE...Today and Tonight

Strong northerly winds and rough seas are expected to develop in
the wake of a cold front this evening. A Small Craft Advisory is
in effect for the coastal waters tonight, with Exercise Caution
for the lakes and bays.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Strong northerly winds and rough seas will continue on Thursday
and a Small Craft Advisory will remain in effect through at least
Thursday morning. Winds will diminish by Friday but Exercise
Caution conditions will be possible into the weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

24

In the hours before

Special weather statement, Mar 1, 2:13 PM CST, 0 minutes before
Special Weather Statement
National Weather Service Lake Charles LA
213 PM CST WED MAR 1 2017

LAZ029-012045-
Avoyelles-
213 PM CST WED MAR 1 2017

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL AVOYELLES
PARISH...

At 212 PM CST, strong thunderstorms were clustered over Echo, or near
Cheneyville, moving east at 30 mph.

Nickel size hail is possible with this storm.

Locations impacted include...
Marksville, Moreauville, Bordelonville, Cottonport, Mansura,
Brouillette, Big Bend, Lake Ophelia National Wildlife Refuge and
Hamburg.

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 3129 9189 3123 9179 3120 9173 3121 9170
      3119 9168 3117 9168 3114 9172 3110 9170
      3109 9172 3105 9172 3100 9177 3100 9206
      3119 9208 3126 9200 3122 9199 3125 9196
      3122 9194 3123 9192 3127 9195 3129 9193
TIME...MOT...LOC 2012Z 262DEG 26KT 3108 9221

Jones

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 1, 3:28 AM CSTSmall Craft AdvisoryLCH6 days
Mar 1, 3:19 PM CSTSpecial Weather StatementLCHEvangeline, Saint Landry26 min
Mar 1, 4:21 PM CSTSpecial Weather StatementLCHSaint Landry39 min

Nearby

Special Weather Statements in Louisiana, 2017Every 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.