Alert archive / Wisconsin / Tornado Watches in 2010
Tornado Watch 543
The Storm Prediction Center issued this tornado watch at Jul 27, 2010, 7:01 PM EDT for 9 counties in Michigan; 11 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2010, 7:01 PM EDT (23:01 UTC)
- Expired
- Jul 28, 2010, 12:35 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Baraga County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Shawano County, WI, Vilas County, WI
The radar
The Marquette radar (KMQT), 113 km from the middle of the area, began a volume at 23:04 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 7:45 PM EDT | Severe Thunderstorm Warning | GRB | Florence, Forest | 45 min |
| Jul 27, 8:09 PM EDT | Severe Thunderstorm Warning | GRB | Vilas | 66 min |
| Jul 27, 8:28 PM EDT | Severe Thunderstorm Warning | GRB | Florence, Marinette | 54 min |
| Jul 27, 8:31 PM EDT | Tornado Warning | GRB | Vilas | 44 min |
| Jul 27, 8:55 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson, Menominee | 50 min |
| Jul 27, 9:01 PM EDT | Severe Thunderstorm Warning | GRB | Oneida | 59 min |
| Jul 27, 9:12 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson, Iron, Marquette | 33 min |
| Jul 27, 9:16 PM EDT | Severe Thunderstorm Warning | GRB | Oneida, Vilas | 36 min |
| Jul 27, 9:34 PM EDT | Severe Thunderstorm Warning | GRB | Florence, Forest | 41 min |
| Jul 27, 9:38 PM EDT | Severe Thunderstorm Warning | MQT | Iron | 52 min |
| Jul 27, 9:43 PM EDT | Tornado Warning | MQT | Dickinson, Menominee | 32 min |
| Jul 27, 9:55 PM EDT | Severe Thunderstorm Warning | GRB | Forest, Langlade, Lincoln, Oneida | 65 min |
| Jul 27, 10:16 PM EDT | Tornado Warning | MQT | Delta, Menominee | 44 min |
| Jul 27, 10:16 PM EDT | Severe Thunderstorm Warning | GRB | Florence, Forest, Marinette | 59 min |
| Jul 27, 10:39 PM EDT | Severe Thunderstorm Warning | GRB | Marathon | 51 min |
| Jul 27, 10:46 PM EDT | Severe Thunderstorm Warning | GRB | Forest, Langlade, Marinette, Oconto | 44 min |
| Jul 27, 10:54 PM EDT | Severe Thunderstorm Warning | GRB | Langlade, Menominee, Shawano | 37 min |
| Jul 27, 11:03 PM EDT | Flash Flood Warning | GRB | Florence | 6 hr |
| Jul 27, 11:08 PM EDT | Tornado Warning | MQT | Delta, Menominee | 19 min |
| Jul 27, 11:20 PM EDT | Severe Thunderstorm Warning | GRB | Marinette, Oconto | 37 min |
| Jul 27, 11:29 PM EDT | Severe Thunderstorm Warning | GRB | Marathon, Portage, Wood | 61 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.0 hours before the alert went out and 397 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
- 2143 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 256 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 21.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 6:23 PM EDT | Mesoscale Discussion | SPC | Baraga, Dickinson, Iron | 67 min |
| Jul 27, 8:01 AM EDT | Mesoscale Discussion | SPC | Burnett | 89 min |
| Jul 27, 11:44 AM EDT | Mesoscale Discussion | SPC | Brown, Forest, Langlade, Lincoln, Marathon, Marinette and 8 more | 61 min |
| Jul 27, 2:43 PM EDT | Mesoscale Discussion | SPC | Barron, Burnett, Chippewa, Dunn, Polk, Saint Croix and 1 more | 32 min |
| Jul 27, 4:29 PM EDT | Tornado Watch | SPC | Ashland, Barron, Bayfield, Burnett, Chippewa, Douglas and 12 more | 7 hr |
Nearby
Tornado Watches in Wisconsin, 2010Tornado Watches in Michigan, 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.