Alert archive / Kentucky / Mesoscale Discussions in 2009
Mesoscale Discussion 772
The Storm Prediction Center issued this mesoscale discussion at May 8, 2009, 10:04 PM CDT for 4 states. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- May 8, 2009, 10:04 PM CDT (03:04 UTC)
- Expired
- May 8, 2009, 11:30 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 57 counties
Clay County, AR, Greene County, AR, Adair County, KY, Allen County, KY, Barren County, KY, Butler County, KY, Calloway County, KY, Carlisle County, KY, Casey County, KY, Christian County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Green County, KY, Hickman County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, Metcalfe County, KY, Monroe County, KY, Russell County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Wayne County, KY, Butler County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Stoddard County, MO, Benton County, TN, Cheatham County, TN, Clay County, TN, Davidson County, TN, Dickson County, TN, Dyer County, TN, Fentress County, TN, Henry County, TN, Houston County, TN, Jackson County, TN, Lake County, TN, Macon County, TN, Montgomery County, TN, Obion County, TN, Overton County, TN, Pickett County, TN, Robertson County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 63 km from the middle of the area, began a volume at 03:04 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
Nashville Metro, TN (KBNA), launched 00:00Z, 3.1 hours before the alert went out and 166 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
- 755 J/kg
- Mixed-layer CIN
- -212 J/kg
- Mixed-layer LCL
- 1403 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 286 m²/s²
- 0-3 km storm-relative helicity
- 487 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
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 |
|---|---|---|---|---|
| May 8, 7:30 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Mississippi, Poinsett | 90 min |
| May 8, 9:31 PM CDT | Mesoscale Discussion | SPC | Cleburne, Conway, Crawford, Faulkner, Franklin, Izard and 15 more | 89 min |
| May 8, 10:31 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Greene, Lawrence, Randolph | 7 hr |
| May 8, 11:19 PM CDT | Mesoscale Discussion | SPC | Miller | 86 min |
| May 9, 2:22 AM CDT | Mesoscale Discussion | SPC | Craighead, Crittenden, Cross, Greene, Mississippi, Poinsett | 53 min |
| May 9, 12:33 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 13 more | 57 min |
| May 9, 12:51 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 22 more | 7 hr |
| May 9, 3:25 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 13 more | 65 min |
| May 8, 10:37 PM CDT | Mesoscale Discussion | SPC | Johnson | 53 min |
Nearby
Mesoscale Discussions in Kentucky, 2009Mesoscale Discussions in Tennessee, 2009Mesoscale Discussions in Missouri, 2009Every mesoscale discussion in 2009
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.