Alert archive / Louisiana / Special Weather Statements in 2016

Special Weather Statement, NWS Lake Charles, LA

June 28, 2016Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Jun 28, 2016, 12:48 PM CDT for Avoyelles Parish, Louisiana. It was in force for 27 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: Jun 28, 2016, 12:48 PM CDT (17:48 UTC)
Expired: Jun 28, 2016, 1:15 PM CDT
In force: 27 min
Issued by: NWS Lake Charles, LA

County Avoyelles Parish, LA

The radar

The Ft Polk radar (KPOE), 78 km from the middle of the area, began a volume at 17:50 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, 5.8 hours before the alert went out and 130 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: 1566 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 30 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 Jun 27, 4:07 PM CDT, 20 hours 41 minutes earlier.

Area forecast discussion, Jun 27, 4:07 PM CDT, 20 hours 41 minutes before

Area Forecast Discussion
National Weather Service Lake Charles LA
407 PM CDT MON JUN 27 2016

.DISCUSSION...
Temperatures maxed out in the low to mid 90s this afternoon
where rain had yet to fall. The radar was showing quite a bit
of showers and thunderstorms developing during the heat of the day
and moving southward. Radar also showed outflow boundaries coming
down from the north in southwest Louisiana. These outflow
boundaries will likely collide with the sea breeze moving into the
I-10 corridor in the next hour. Heat indices were mostly in the
low to mid 100s...however...we did see Lafayette briefly hit 109
heat indices for less than one hour as clouds and light rain moved
into the area.

In the upper levels...dominant high pressure will finally ease up
through mid week as the high retrogrades to the west in response
to a deepening trough which will develop over the eastern United
States. This setup in the upper levels will drive upper level
disturbances between the upper high to the west and the upper
level trough to the east. Therefore...we expect clouds to
increase and showers and thunderstorms to ramp up through midweek.

We will finally get relief from the heat indices which have been
in the lower to mid 100s for the last several days. We expect
that to continue through mid week as clouds and rain rule.

Northerly flow at the surface should also add to the comfort
level as long as clouds and rain materialize. Higher pressure
should move back in toward the latter half of the week resulting
in subsidence which equates to hot and dry weather returning in
time for the weekend.

&&

.MARINE...
HIGH PRESSURE ALOFT WILL RETROGRADE WESTWARD OVER THE NEXT TWO
DAYS ALLOWING FOR AN INCREASE IN SHOWERS AND THUNDERSTORMS THROUGH
MIDWEEK. WINDS GENERALLY WILL BE LIGHT NORTHERLY DURING THE DAYS
THROUGH WEDNESDAY AND LIGHT AND VARIABLE AT NIGHT. ONSHORE FLOW
BECOMES MORE DOMINANT TOWARDS THE LATTER HALF OF THE WEEK.

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  75  88  73  91 /  30  60  40  30
LCH  77  90  74  90 /  30  50  40  50
LFT  77  90  75  89 /  30  60  50  60
BPT  76  92  74  91 /  30  50  50  60

&&

.LCH Watches/Warnings/Advisories...
LA...None.
TX...None.
GM...None.
&&

PUBLIC...06

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 1:08 PM CDT	Special Weather Statement	LCH	Saint Landry, Saint Martin	37 min
Jun 28, 1:58 PM CDT	Special Weather Statement	LCH	Saint Martin	47 min
Jun 28, 5:23 PM CDT	Special Marine Warning	LCH		2 hr
Jun 28, 6:02 PM CDT	Special Marine Warning	LCH		88 min
Jun 28, 6:47 PM CDT	Special Marine Warning	LCH		88 min
Jun 28, 4:58 PM CDT	Special Weather Statement	LCH	Jefferson	32 min
Jun 28, 6:16 PM CDT	Special Weather Statement	LCH	Orange	44 min

Nearby

Special Weather Statements in Louisiana, 2016 Every special weather statement in 2016

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.