Alert archive / Michigan / Tornado Watches in 2010
Tornado Watch 747
The Storm Prediction Center issued this tornado watch at Nov 22, 2010, 5:13 PM CST for 4 counties in Illinois; 19 counties in Indiana; 24 counties in Michigan. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 22, 2010, 5:13 PM CST (23:13 UTC)
- Expired
- Nov 22, 2010, 9:29 PM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 47 counties
Ford County, IL, Iroquois County, IL, Kankakee County, IL, Livingston County, IL, Benton County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Jasper County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Tippecanoe County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, White County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Calhoun County, MI, Cass County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Ionia County, MI, Isabella County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Mason County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Saint Joseph County, MI, Van Buren County, MI
The radar
The Chicago radar (KLOT), 90 km from the middle of the area, began a volume at 23:13 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 80%
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.2 hours before the alert went out and 235 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
- 333 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 591 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 309 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 10:50 AM CST | Mesoscale Discussion | SPC | Adams, Brown, Bureau, Fulton, Hancock, Henderson and 14 more | 85 min |
| Nov 22, 11:23 AM CST | Tornado Watch | SPC | Adams, Boone, Brown, Bureau, Carroll, Cass and 45 more | 7 hr |
| Nov 22, 2:10 PM CST | Mesoscale Discussion | SPC | Adams, Boone, Brown, Bureau, Carroll, Cass and 38 more | 95 min |
| Nov 22, 4:50 PM CST | Tornado Watch | SPC | Bond, Calhoun, Champaign, Christian, Clark, Clay and 26 more | 7 hr |
| Nov 22, 3:49 PM CST | Mesoscale Discussion | SPC | Allegan, Barry, Calhoun, Cass, Ionia, Kalamazoo and 13 more | 86 min |
Nearby
Tornado Watches in Michigan, 2010Tornado Watches in Indiana, 2010Tornado Watches in Illinois, 2010Every tornado watch in 2010
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.