/Issued 1:58 PM CDT, Monday, June 17, 2013/
-SPC’s storm reports map for 6/17/10.
115 reports of tornadoes in the Northern Plains and Upper Midwest including 48 tornadoes in Minnesota.
Red dots=tornado reports.
A look back at the June 17, 2010 tornado outbreak that hit Minnesota
Source: National Weather Service Duluth, Minnesota; NWS Storm Prediction Center
*48 tornadoes touched down in Minnesota on June 17, 2010.
*3 EF-4’s and 4 EF-3’s.
*4 fatalities which is the largest number of fatalities since July 5, 1978.
*The 48 tornadoes on June 17, 2010 was the largest single day outbreak in Minnesota history. The previous record was 27 tornadoes on June 16, 1992.
*7 tornadoes occurred in the Duluth NWS area.
6:45 PM: 4 ENE of Breezy Point, MN (Crow Wing County)
8:05 PM: 1 NNE of Haypoint, MN (Aitkin County)
8:55 PM: 5 SW of Grantsburg, WI (Pine County) ***3 injuries***
9:00 PM: 3 W of Grantsburg, WI (Burnett County)
9:07 PM: 2 ENE of Grantsburg, WI (Burnett County)
10:08 PM: 6 WNW of Webb Lake, WI (Burnett County)
10:08 PM: 6 NE of Webb Lake, WI (Washburn County)
-Map for 3 PM June 17, 2010. Strong low pressure was over Central North Dakota with 60+ dew points and strong southerly winds over Minnesota out ahead of the surface low.
-Significant tornado parameter at 9 PM June 17, 2010. Incredibly high tornado parameters covered the Eastern 1/2 of Minnesota.
-Moderate risk for severe thunderstorms was issued for this outbreak for much of Central and Southern Minnesota (red outlined area)
-Tornado forecast. 10% hatched area for tornadoes for much of Western and Central Minnesota for June 17, 2010. A hatched area means there’s a chance for EF2 to EF5 tornadoes within 25 miles of a location.
-Radar image 8:45 PM CDT 6/17/10. 1 of the tornadoes in the Duluth area, note the red/green couplet southeast of Pine City.
-9:36 PM CDT radar image of the tornado near Yellow Lake, WI. A classic hook pattern (left image)
-Radar image of the Haypoint, MN (Aitkin County) tornado. Again notice the hook like appearance on radar, tornado signature.
-500mb map at 7 PM CDT 6/17/10. SW flow covered Minnesota with a deep upper low/trough stretching from the Pacific NW to the Northern Rockies and Northern Plains.
-300mb map at 7 PM CDT 6/17/10. 70 knot jet stream winds surging E/NE out of the Northern Rockies and Northern Plains helping to fuel the severe weather/tornado outbreak.
Tim
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