Alert archive / Illinois / Mesoscale Discussions in 2009
Mesoscale Discussion 838
The Storm Prediction Center issued this mesoscale discussion at May 15, 2009, 5:31 PM CDT for 4 states. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- May 15, 2009, 5:31 PM CDT (22:31 UTC)
- Expired
- May 15, 2009, 7:30 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 106 counties
Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Iroquois County, IL, Jasper County, IL, Jersey County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Pike County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Tazewell County, IL, Vermilion County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Fountain County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Howard County, IN, Huntington County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Shelby County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, White County, IN, Johnson County, KS, Wyandotte County, KS, Audrain County, MO, Boone County, MO, Callaway County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, City of Saint Louis, MO, Clay County, MO, Cooper County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Lincoln County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Pettis County, MO, Pike County, MO, Platte County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 93 km from the middle of the area, began a volume at 22:35 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 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 15, 12:50 PM CDT | Tornado Watch | SPC | Adams, Brown, Calhoun, Pike | 7 hr |
| May 15, 2:05 PM CDT | Mesoscale Discussion | SPC | Cass, Champaign, Christian, Coles, Cumberland, DeWitt and 23 more | 25 min |
| May 15, 2:39 PM CDT | Tornado Watch | SPC | Bond, Cass, Champaign, Christian, Clinton, Coles and 33 more | 7 hr |
| May 15, 3:43 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Pike | 62 min |
| May 15, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Randolph | 6 hr |
| May 15, 12:57 PM CDT | Mesoscale Discussion | SPC | Harrison | 63 min |
| May 15, 6:39 PM CDT | Tornado Watch | SPC | Adams, Benton, Blackford, Boone, Carroll, Cass and 37 more | 6 hr |
| May 15, 2:03 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 17 more | 87 min |
| May 15, 7:14 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Jackson, Marshall, Nemaha and 3 more | 91 min |
| May 15, 7:42 AM CDT | Severe Thunderstorm Watch | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Douglas and 18 more | 5 hr |
| May 15, 11:48 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Marshall, Nemaha | 57 min |
| May 15, 2:44 PM CDT | Mesoscale Discussion | SPC | Anderson, Barber, Butler, Chase, Coffey, Comanche and 24 more | 31 min |
| May 15, 3:01 PM CDT | Mesoscale Discussion | SPC | Jefferson, Leavenworth, Shawnee, Wyandotte | 59 min |
| May 15, 3:02 PM CDT | Tornado Watch | SPC | Allen, Anderson, Barber, Butler, Chase, Chautauqua and 29 more | 7 hr |
| May 15, 5:52 PM CDT | Mesoscale Discussion | SPC | Anderson, Butler, Chase, Coffey, Cowley, Elk and 8 more | 53 min |
Nearby
Mesoscale Discussions in Illinois, 2009Mesoscale Discussions in Indiana, 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; radar from the NEXRAD Level II archive.