Alert archive / Louisiana / Special Weather Statements in 2018

Special Weather Statement, NWS Lake Charles, LA

May 15, 2018Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at May 15, 2018, 3:02 PM CDT for Avoyelles Parish, Louisiana. It was in force for 13 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: May 15, 2018, 3:02 PM CDT (20:02 UTC)
Expired: May 15, 2018, 3:15 PM CDT
In force: 13 min
Issued by: NWS Lake Charles, LA

County Avoyelles Parish, LA

The radar

The Ft Polk radar (KPOE), 109 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 179 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: 185 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 1408 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: -28 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 May 15, 12:31 PM CDT, 2 hours 31 minutes earlier.

Area forecast discussion, May 15, 12:31 PM CDT, 2 hours 31 minutes before

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Hazardous weather outlook, May 15, 3:31 AM CDT, 11 hours 31 minutes before

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In the hours before

Special weather statement, May 15, 3:02 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
302 PM CDT TUE MAY 15 2018

LAZ029-152015-
Avoyelles LA-
302 PM CDT TUE MAY 15 2018

...SPECIAL WEATHER STATEMENT...

At 301 PM CDT, Doppler radar was tracking a strong thunderstorm near
Lake Ophelia National Wildlife Refuge, or 7 miles north of
Bordelonville, moving south at 5 mph.

Half inch hail will be possible with this storm.

Locations impacted include...
Bordelonville and Lake Ophelia National Wildlife Refuge.

LAT...LON 3126 9185 3127 9184 3123 9179 3122 9176
      3120 9173 3121 9170 3118 9168 3117 9168
      3116 9170 3114 9171 3106 9190 3125 9196
      3124 9195 3123 9195 3122 9194 3123 9192
      3126 9194 3129 9189
TIME...MOT...LOC 2001Z 000DEG 5KT 3120 9186

Tingler

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 3:16 PM CDT	Special Weather Statement	LCH	Vermilion	14 min
May 15, 3:24 PM CDT	Special Weather Statement	LCH	Avoyelles	36 min
May 15, 3:46 PM CDT	Special Weather Statement	LCH	Saint Landry	29 min
May 15, 3:58 PM CDT	Severe Thunderstorm Warning	LCH	Saint Landry	32 min
May 15, 5:44 PM CDT	Special Weather Statement	LCH	Vermilion	46 min
May 15, 6:43 PM CDT	Special Weather Statement	LCH	Jefferson Davis	47 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.