Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 287

March 30, 20167 counties in Arkansas; 7 parishes in Louisiana; 12 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2016, 2:07 PM CDT for 7 counties in Arkansas; 7 parishes in Louisiana; 12 counties in Texas. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2016, 2:07 PM CDT (19:07 UTC)
Expired: Mar 30, 2016, 3:30 PM CDT
In force: 83 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 26 counties

Columbia County, AR, Hempstead County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Red River Parish, LA, Webster Parish, LA, Bowie County, TX, Camp County, TX, Cass County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Panola County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX

The radar

The Shreveport radar (KSHV), 70 km from the middle of the area, began a volume at 19:10 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 7.1 hours before the alert went out and 71 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: 568 J/kg
Mixed-layer CIN: -248 J/kg
Mixed-layer LCL: 547 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

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
Mar 30, 11:57 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clark, Conway and 27 more	63 min
Mar 30, 2:31 PM CDT	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 23 more	7 hr
Mar 30, 5:06 PM CDT	Mesoscale Discussion	SPC	Calhoun, Clark, Columbia, Dallas, Hempstead, Lafayette and 5 more	84 min
Mar 30, 6:15 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 17 more	90 min
Mar 30, 6:53 PM CDT	Tornado Watch	SPC	Ashley, Chicot, Craighead, Crittenden, Cross, Lee and 4 more	8 hr
Mar 30, 3:53 PM CDT	Mesoscale Discussion	SPC	Allen, Avoyelles, Evangeline, Grant, LaSalle, Pointe Coupee and 3 more	97 min
Mar 30, 1:00 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Montague, Wichita, Wilbarger	2 hr
Mar 30, 1:50 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Wichita	8 hr
Mar 30, 1:57 PM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Callahan, Coke, Coleman, Collin and 28 more	63 min
Mar 30, 2:09 PM CDT	Severe Thunderstorm Watch	SPC	Bosque, Brown, Callahan, Coke, Coleman, Collin and 28 more	5 hr
Mar 30, 3:54 PM CDT	Mesoscale Discussion	SPC	Archer, Bosque, Brown, Callahan, Clay, Coleman and 27 more	96 min
Mar 30, 5:36 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bell, Bosque, Collin, Coryell, Dallas and 30 more	4 hr

Nearby

Mesoscale Discussions in Texas, 2016 Mesoscale Discussions in Arkansas, 2016 Mesoscale Discussions in Louisiana, 2016 Every mesoscale discussion 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.