Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 1417
The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2012, 12:42 PM CDT for 6 states. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Jul 6, 2012, 12:42 PM CDT (17:42 UTC)
- Expired
- Jul 6, 2012, 2:15 PM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 76 counties
Clay County, AR, Greene County, AR, Mississippi County, AR, Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph 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, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO, Benton County, TN, Carroll County, TN, Crockett County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Henry County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Montgomery County, TN, Obion County, TN, Stewart County, TN, Tipton County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 43 km from the middle of the area, began a volume at 17:43 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 (KLZK), launched 12:00Z, 5.7 hours before the alert went out and 252 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
- 1117 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1748 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| Jul 6, 2:36 PM CDT | Mesoscale Discussion | SPC | Crittenden, Cross, Lee, Mississippi, Phillips, Poinsett and 1 more | 84 min |
| Jul 6, 6:15 PM CDT | Mesoscale Discussion | SPC | Arkansas, Chicot, Crittenden, Cross, Desha, Drew and 4 more | 2 hr |
| Jul 6, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Cheatham, Chester, Crockett, Davidson and 36 more | 5 hr |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Missouri, 2012Mesoscale Discussions in Illinois, 2012Every mesoscale discussion in 2012
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.