Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Lake Charles, LA

August 11, 2021Lafayette Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Aug 11, 2021, 12:45 PM CDT for Lafayette Parish, Louisiana. It was in force for 45 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: Aug 11, 2021, 12:45 PM CDT (17:45 UTC)
Expired: Aug 11, 2021, 1:30 PM CDT
In force: 45 min
Issued by: NWS Lake Charles, LA
Hail: 0.00 in
Wind: 30

County Lafayette Parish, LA

The radar

The Lake Charles radar (KLCH), 125 km from the middle of the area, began a volume at 17:46 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 12:00Z, 5.8 hours before the alert went out and 123 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: 3222 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 742 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: -42 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 Aug 11, 11:00 AM CDT, 1 hour 45 minutes earlier.

Area forecast discussion, Aug 11, 11:00 AM CDT, 1 hour 45 minutes before

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Hazardous weather outlook, Aug 11, 5:30 AM CDT, 7 hours 15 minutes before

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In the hours before

Special weather statement, Aug 11, 12:45 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
1245 PM CDT Wed Aug 11 2021

LAZ044-045-052-053-111830-
Iberia LA-Lafayette LA-Vermilion LA-Upper St. Martin LA-
1245 PM CDT Wed Aug 11 2021

...A strong thunderstorm will impact portions of northwestern Iberia,
southeastern Lafayette, northeastern Vermilion and west central St.
Martin Parishes through 130 PM CDT...

At 1245 PM CDT, Doppler radar was tracking a strong thunderstorm near
New Iberia, moving northwest at 5 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
New Iberia, Abbeville, St. Martinville, Avery Island, Broussard,
Youngsville, Erath, Delcambre, Cade, Lydia, Acadiana Regional
Airport, Jefferson Island, Coteau and Milton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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.

&&

LAT...LON 2984 9193 2985 9194 2993 9209 2999 9215
      3007 9219 3017 9185 2995 9169 2987 9179
      2984 9191 2985 9192 2984 9192
TIME...MOT...LOC 1745Z 146DEG 4KT 2996 9187

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

Warthen

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 1:54 PM CDT	Special Weather Statement	LCH	Allen	51 min
Aug 11, 2:36 PM CDT	Special Weather Statement	LCH	Beauregard	24 min
Aug 11, 3:00 PM CDT	Special Weather Statement	LCH	St. Mary	45 min
Aug 11, 3:22 PM CDT	Special Weather Statement	LCH	Saint Landry	23 min
Aug 11, 3:44 PM CDT	Special Weather Statement	LCH	Saint Martin	31 min
Aug 11, 4:17 PM CDT	Special Weather Statement	LCH	Saint Martin, St. Mary	28 min
Aug 11, 4:44 PM CDT	Special Weather Statement	LCH	Lafayette	31 min

Nearby

Special Weather Statements in Louisiana, 2021 Every special weather statement in 2021

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.