Alert archive / Louisiana / Mesoscale Discussions in 2018

Mesoscale Discussion 81

February 21, 201823 parishes in Louisiana; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 21, 2018, 12:28 PM CST for 23 parishes in Louisiana; 6 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Feb 21, 2018, 12:28 PM CST (18:28 UTC)
Expired: Feb 21, 2018, 2:00 PM CST
In force: 92 min
Issued by: the Storm Prediction Center

All 29 counties

Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Vernon Parish, LA, Winn Parish, LA, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Newton County, TX, Orange County, TX, Sabine County, TX

The radar

The Ft Polk radar (KPOE), 13 km from the middle of the area, began a volume at 18:32 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 text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 21, 9:07 AM CST	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 12 more	113 min
Feb 21, 9:48 AM CST	Tornado Watch	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 17 more	7 hr
Feb 21, 3:03 PM CST	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 20 more	117 min
Feb 21, 7:57 AM CST	Mesoscale Discussion	SPC	Archer, Baylor, Borden, Callahan, Childress, Clay and 35 more	4 hr
Feb 21, 12:44 PM CST	Mesoscale Discussion	SPC	Clay, Cooke, Denton, Jack, Montague, Palo Pinto and 1 more	4 hr

Nearby

Mesoscale Discussions in Louisiana, 2018 Mesoscale Discussions in Texas, 2018 Every mesoscale discussion 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; radar from the NEXRAD Level II archive.