Alert archive / Kentucky / Mesoscale Discussions in 2018
Mesoscale Discussion 1701
The Storm Prediction Center issued this mesoscale discussion at Dec 8, 2018, 9:43 PM CST for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 8, 2018, 9:43 PM CST (03:43 UTC)
- Expired
- Dec 9, 2018, 1:45 AM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 50 counties
Clay County, AR, Craighead County, AR, Cross County, AR, Greene County, AR, Independence County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Allen County, KY, Barren County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Cumberland County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, Metcalfe County, KY, Monroe County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Benton County, TN, Carroll County, TN, Clay County, TN, Crockett County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Houston County, TN, Lake County, TN, Lauderdale County, TN, Macon County, TN, Montgomery County, TN, Obion County, TN, Robertson County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 87 km from the middle of the area, began a volume at 03:43 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 nearest sounding before it
Little Rock, AR (KBYH), launched 00:00Z, 3.7 hours before the alert went out and 194 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
- 6 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 445 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 8, 9:32 PM CST | Mesoscale Discussion | SPC | Carter, Johnson, Unicoi | 5 hr |
| Dec 9, 2:08 AM CST | Mesoscale Discussion | SPC | Carter, Johnson, Unicoi | 5 hr |
| Dec 9, 7:18 AM CST | Mesoscale Discussion | SPC | Carter, Greene, Johnson, Sullivan, Unicoi, Washington | 5 hr |
| Dec 9, 11:34 AM CST | Mesoscale Discussion | SPC | Johnson | 5 hr |
Nearby
Mesoscale Discussions in Kentucky, 2018Mesoscale Discussions in Tennessee, 2018Mesoscale Discussions in Arkansas, 2018Every mesoscale discussion in 2018
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.