Alert archive / Kentucky / Mesoscale Discussions in 2009
Mesoscale Discussion 1773
The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2009, 2:36 PM CDT for 4 states. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2009, 2:36 PM CDT (19:36 UTC)
- Expired
- Aug 4, 2009, 4:00 PM CDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 106 counties
Alexander County, IL, Gallatin County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Adair County, KY, Allen County, KY, Ballard County, KY, Barren County, KY, Boyle County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Casey County, KY, Christian County, KY, Clinton County, KY, Crittenden County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Hart County, KY, Hickman County, KY, Hopkins County, KY, Larue County, KY, Laurel County, KY, Lincoln County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marion County, KY, Marshall County, KY, McCracken County, KY, McCreary County, KY, McLean County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Pulaski County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Wayne County, KY, Webster County, KY, Whitley County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dent County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO, Campbell County, TN, Cheatham County, TN, Clay County, TN, Cumberland County, TN, Fentress County, TN, Jackson County, TN, Macon County, TN, Montgomery County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Scott County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN
The radar
The Paducah radar (KPAH), 73 km from the middle of the area, began a volume at 19:39 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 12:00Z, 7.6 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
- 3443 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 680 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
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 |
|---|---|---|---|---|
| Aug 4, 4:06 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Greene, Hancock, Jersey and 2 more | 5 hr |
| Aug 4, 7:11 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 8 more | 94 min |
| Aug 4, 7:39 AM CDT | Severe Thunderstorm Watch | SPC | Bond, Cass, Champaign, Christian, Clark, Clay and 37 more | 4 hr |
| Aug 4, 3:09 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 8 more | 7 hr |
| Aug 4, 6:21 PM CDT | Mesoscale Discussion | SPC | Alexander, Johnson, Massac, Pope, Pulaski, Union | 114 min |
| Aug 4, 4:37 AM CDT | Mesoscale Discussion | SPC | Boone | 53 min |
| Aug 4, 8:41 AM CDT | Severe Thunderstorm Watch | SPC | Carroll, Gallatin, Henry, Jefferson, Oldham, Owen and 1 more | 6 hr |
| Aug 4, 8:47 AM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Gallatin, Grant, Henry, Jefferson and 5 more | 58 min |
| Aug 4, 11:41 AM CDT | Mesoscale Discussion | SPC | Adair, Anderson, Barren, Boyle, Breckinridge, Bullitt and 43 more | 94 min |
| Aug 4, 12:21 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Barren, Bell, Bourbon and 58 more | 7 hr |
| Aug 4, 3:29 PM CDT | Severe Thunderstorm Watch | SPC | Harlan, Knott, Leslie, Letcher, Perry | 6 hr |
| Aug 4, 5:45 PM CDT | Mesoscale Discussion | SPC | Allen, Barren, Breckinridge, Butler, Daviess, Edmonson and 9 more | 90 min |
| Aug 4, 1:10 AM CDT | Severe Thunderstorm Watch | SPC | Andrew, Atchison, Holt, Nodaway | 6 hr |
| Aug 4, 2:11 AM CDT | Mesoscale Discussion | SPC | Adair, Caldwell, Chariton, Daviess, DeKalb, Gentry and 13 more | 2 hr |
| Aug 4, 5:49 AM CDT | Mesoscale Discussion | SPC | Atchison, Holt | 56 min |
| Aug 4, 6:34 PM CDT | Severe Thunderstorm Watch | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 35 more | 4 hr |
Nearby
Mesoscale Discussions in Kentucky, 2009Mesoscale Discussions in Missouri, 2009Mesoscale Discussions in Tennessee, 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.