Alert archive / Louisiana / Mesoscale Discussions in 2005

Mesoscale Discussion 876

May 14, 200515 parishes in Louisiana; Panola County, Shelby County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 14, 2005, 12:13 PM CDT for 15 parishes in Louisiana; Panola County, Shelby County, Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: May 14, 2005, 12:13 PM CDT (17:13 UTC)
Expired: May 14, 2005, 2:45 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Bienville Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, De Soto Parish, LA, Franklin Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Winn Parish, LA, Panola County, TX, Shelby County, TX

The radar

The Shreveport radar (KSHV), 44 km from the middle of the area, began a volume at 17:16 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

Jackson, MS (KJAN), launched 12:00Z, 5.2 hours before the alert went out and 328 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: 424 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: -27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 13, 8:05 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 26 more	55 min
May 13, 9:22 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Eastland, Haskell and 5 more	83 min
May 14, 12:25 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Concho, Eastland and 14 more	35 min
May 14, 2:07 PM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Crockett, Culberson, Ector, El Paso and 17 more	83 min
May 14, 2:55 PM CDT	Severe Thunderstorm Watch	SPC	Crane, Crockett, Culberson, Ector, Hudspeth, Jeff Davis and 9 more	7 hr

Nearby

Mesoscale Discussions in Louisiana, 2005 Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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.