Alert archive / Kentucky / Mesoscale Discussions in 2014
Mesoscale Discussion 123
The Storm Prediction Center issued this mesoscale discussion at Feb 20, 2014, 1:45 PM CST for 7 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 20, 2014, 1:45 PM CST (19:45 UTC)
- Expired
- Feb 20, 2014, 3:45 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 56 counties
Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Alexander County, IL, Gallatin County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, White County, IL, Williamson County, IL, Posey County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Union County, KY, Webster County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Scott County, MO, Stoddard County, MO, DeSoto County, MS, Tate County, MS, Tunica County, MS, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Haywood County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 101 km from the middle of the area, began a volume at 19:44 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, 7.8 hours before the alert went out and 180 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
- 4 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 632 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 366 m²/s²
- 0-3 km storm-relative helicity
- 420 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Feb 20, 11:01 AM CST | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 12 more | 119 min |
| Feb 20, 12:47 PM CST | Severe Thunderstorm Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 18 more | 7 hr |
| Feb 20, 2:23 PM CST | Tornado Watch | SPC | Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more | 7 hr |
| Feb 20, 3:11 PM CST | Mesoscale Discussion | SPC | Ashley, Chicot, Desha | 94 min |
| Feb 20, 5:29 PM CST | Mesoscale Discussion | SPC | Crittenden, Mississippi | 46 min |
| Feb 20, 11:34 AM CST | Mesoscale Discussion | SPC | Brown, Calhoun, Cass, Greene, Jersey, Macoupin and 3 more | 116 min |
| Feb 20, 1:36 PM CST | Severe Thunderstorm Watch | SPC | Adams, Bond, Brown, Calhoun, Christian, Clinton and 15 more | 4 hr |
| Feb 20, 3:23 PM CST | Mesoscale Discussion | SPC | Bond, Calhoun, Christian, Clark, Clay, Clinton and 25 more | 97 min |
| Feb 20, 3:50 PM CST | Severe Thunderstorm Watch | SPC | Clark, Clay, Coles, Crawford, Cumberland, DeWitt and 11 more | 56 min |
| Feb 20, 4:45 PM CST | Tornado Watch | SPC | Champaign, Clark, Clay, Coles, Crawford, Cumberland and 12 more | 3 hr |
| Feb 20, 5:45 PM CST | Tornado Watch | SPC | Bartholomew, Boone, Brown, Carroll, Clark, Clinton and 36 more | 5 hr |
| Feb 20, 5:55 PM CST | Mesoscale Discussion | SPC | Adams, Alcorn, Amite, Attala, Benton, Calhoun and 61 more | 35 min |
| Feb 20, 2:43 AM CST | Mesoscale Discussion | SPC | Benton, Camden, Cedar, Cole, Crawford, Dade and 29 more | 3 hr |
| Feb 20, 4:24 AM CST | Mesoscale Discussion | SPC | Andrew, Buchanan, Caldwell, Clay, Clinton, Daviess and 11 more | 2 hr |
| Feb 20, 10:20 AM CST | Mesoscale Discussion | SPC | Adair, Clark, Daviess, Gentry, Grundy, Harrison and 7 more | 85 min |
Nearby
Mesoscale Discussions in Kentucky, 2014Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Tennessee, 2014Every mesoscale discussion in 2014
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.