Alert archive / Arkansas / Mesoscale Discussions in 2015
Mesoscale Discussion 1966
The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2015, 9:59 AM CST for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 17, 2015, 9:59 AM CST (15:59 UTC)
- Expired
- Nov 17, 2015, 12:00 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 76 counties
Arkansas County, AR, Ashley County, AR, Baxter County, AR, Boone County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lafayette County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Marion County, AR, Miller County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Dunklin County, MO, Howell County, MO, Oregon County, MO, Ozark County, MO, Ripley County, MO, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Quitman County, MS, Tunica County, MS, Shelby County, TN, Tipton County, TN
The radar
The Little Rock radar (KLZK), 39 km from the middle of the area, began a volume at 16:03 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
Little Rock, AR (KBYH), launched 12:00Z, 4.0 hours before the alert went out and 185 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.
- Mixed-layer CAPE
- 344 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 618 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 403 m²/s²
- 0-3 km storm-relative helicity
- 550 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 8.5
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 17, 4:35 AM CST | Mesoscale Discussion | SPC | Benton, Crawford, Franklin, Howard, Johnson, Logan and 9 more | 115 min |
| Nov 17, 4:48 AM CST | Tornado Watch | SPC | Howard, Little River, Miller, Sevier | 4 hr |
| Nov 17, 6:27 AM CST | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Clark, Conway and 21 more | 6 hr |
| Nov 17, 8:24 AM CST | Mesoscale Discussion | SPC | Columbia, Lafayette | 66 min |
| Nov 17, 8:55 AM CST | Tornado Watch | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more | 7 hr |
| Nov 17, 11:07 AM CST | Tornado Watch | SPC | Arkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 21 more | 6 hr |
| Nov 17, 12:19 PM CST | Mesoscale Discussion | SPC | Ashley, Chicot | 116 min |
| Nov 17, 12:36 PM CST | Tornado Watch | SPC | Ashley, Chicot | 7 hr |
| Nov 17, 1:35 PM CST | Mesoscale Discussion | SPC | Arkansas, Cleburne, Cleveland, Craighead, Crittenden, Cross and 25 more | 115 min |
| Nov 17, 3:15 PM CST | Tornado Watch | SPC | Craighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more | 4 hr |
| Nov 17, 3:19 PM CST | Mesoscale Discussion | SPC | Clay, Fulton, Greene, Izard, Lawrence, Randolph and 1 more | 116 min |
| Nov 17, 5:36 PM CST | Mesoscale Discussion | SPC | Crittenden, Cross, Lee, Monroe, Phillips, Poinsett and 1 more | 84 min |
Nearby
Mesoscale Discussions in Arkansas, 2015Mesoscale Discussions in Mississippi, 2015Mesoscale Discussions in Missouri, 2015Every mesoscale discussion in 2015
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.