A cold front moving through a warm and unstable air mass produced severe thunderstorms over northwest Upper Michigan on the evening of the 10th.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MQT wrote it up.
A cold front moving through a warm and unstable air mass produced severe thunderstorms over northwest Upper Michigan on the evening of the 10th.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Marquette, MI wrote its last area forecast discussion before the first event at Jun 10, 6:58 PM EST, 1 hour 5 minutes earlier.
Area Forecast Discussion
National Weather Service Marquette MI
758 PM EDT Sat Jun 10 2017
.SHORT TERM...(This evening through Sunday)
Issued at 336 PM EDT SAT JUN 10 2017
Through the afternoon hours, surface low pressure continued to lift
northeast into Ontario, with a trailing cold front traversing north
central Minnesota. Ahead of this front, a few elevated thunderstorms
developed earlier this morning across the west along the edge of
850mb moisture transport. As the warm sector spread northeast across
Upper Michigan today, skies began to clear thanks to a stout EML
advecting overhead. Strong and gusty southwest winds were observed
across much of the area allowing the warm air aloft to mix down to
the surface allowing temperatures to climb into the upper 80s.
Downsloping effects have allow temperatures to push towards the 90
degree mark across far north central portions of the area. Further
to the east, modified air off of Lake Michigan kept temperatures
much cooler.
Late this afternoon/evening, the strong and gusty southwest winds
are expected to continue and look to remain on track for decreasing
in speed as we lose diurnal mixing late this evening. Therefore, do
not plan on making any adjustments to the inherited wind advisory.
Also, these strong and gusty southwest winds running up the main axis
of Lake Michigan will allow the high swim risk to continue through
the end of the day across the northern shores of Lake Michigan.
The concern then turns to the threat for severe weather this
evening/tonight. Ahead of the cold front, surface dew points have
climbed into low to mid 60s allowing MUCAPES to climb into the 1000-
2000 J/kg range this afternoon across western portions of the area.
One of the big concerns with convective initiation remains the
strong capping that is in place, as evident by clearing across much
of the area today; however, with strong moisture transport lifting
northeast along the cold front and a mid-level jet streak progged to
lift across the area, expect the cap to erode/weaken later this
afternoon and allow for at least some isolated storms to develop.
This subtle shortwave will allow for effective shear values to
increase to 50-60 knots this evening. The combination of shear and a
modestly unstable airmass will allow for any convection that does to
become severe as updrafts should be more than capable of rotating.
While large hail and damaging winds look to be the main hazards with
these storms, rotating updrafts may be able to take advantage of the
low-level shear and lowering LCLs initially to warrant at least a
mention of a low tornado potential across the western portions of
Upper Michigan. While convection looks more likely, the best chances
will likely be along the nose of the MUCAPE and theta-e gradient,
which would favor western portions of Upper Michigan, but especially
the southwest. Later tonight any storms that move into central
portions of the area will still be strong to possibly severe, but
with the main shortwave lifting northeast of the area and the mid-
level flow will become more parallel to front, the forcing will
weaken and the coverage should diminish.
Through the early Sunday morning hours, the front will continue to
push south into Wisconsin and lower Michigan, but it is expected to
retreat back north later in the day on Sunday. This will bring back
chances for thunderstorms across the area. There is some fairly
decent disagreement in how far south the front will get tonight;
therefore, if the front takes the furthest south solution, it may
not lift back north as early as denoted within the ongoing forecast.
Whether or not we see any severe weather will also depend on how far
north this front can get during the day.
.LONG TERM...(Sunday night through Saturday)
Issued at 336 PM EDT SAT JUN 10 2017
Sunday night... 500mb ridge positioned across the mid-atlantic will
maintain a tight southwest gradient across the upper midwest Sun
ngt. Operational guidance continues to prog a trough axis pivoting
east across the Northern Plains/Upper Midwest with a northward
lifting quasi-stationary boundary across Northern Minnesota and
Wisconsin. This could help prolong convective trends from the
afternoon into the evening hours across the western/central U.P.
Have nudged higher the prob of thunder, with slightly increased POPs
through Sun eve towards categorical; however, with expected
increasing cloud cover it is possible this could dampen
coverage/intensity of convection. Temps will struggle to radiate Sun
ngt, and likely remain mild in the low 60s to perhaps around 60 and
could see several degrees warmer as well depending on placement of
boundary and prior convection.
Monday through Tuesday... 500mb ridge is progged to relax slightly
then re-build Mon ngt/Tue across the Northern Plains. This will
deflect the trough axis north of the region with a secondary trough
axis lingering across the Northern Rockies. Weak surface ridge will
push the quasi-stationary boundary back south briefly Mon and
displace the higher POPs along and south of the boundary. Then with
the ridge building north again Tue this will push the POPs back
north Tue. Temps will warm again into the upper 70s to low 80s with
south/southeast flow, this will help keep the Lake Michigan coastal
areas several degrees cooler.
Wednesday through Friday... Ensembles continue to show good
agreement with minimal spread amongst solutions in the Wed/Thur
timeframe. Guidance indicates ridging trying to develop across the
Western CONUS, which should allow temps to relax from above normal
temps to more seasonal towards the end of next week. Periodic
chances for showers and thunderstorms will persist through the bulk
of the extended periods, with the best chances being Wed/Thur
morning and again later Fri into Sat.
&&
.AVIATION...(For the 00Z TAFS through 00Z Sunday evening)
Issued at 757 PM EDT SAT JUN 10 2017
Main concern through midnight at the terminals is strong/gusty
winds. As daytime heating ends, could also see LLWS with SW-W winds
40-50 kts off the sfc. Winds should diminish significantly at all
terminals after midnight as sfc high pressure ridge slides across.
Still a conditional threat of thunderstorms rest of this evening as
cold front works through, especially at CMX rest of the evening.
Conditions through the TAF period will remain VFR, except possible
MVFR conditions developing late on Sun afternoon at IWD as rain and
some thunderstorms begin to move into the area from the southwest.
&&
.MARINE...(For the 4 PM Lake Superior forecast issuance)
Issued at 336 PM EDT SAT JUN 10 2017
Southwest winds 20 to 30 knots will become westerly tonight as a
cold front pushes southeast across the Upper Great Lakes. By Sunday,
winds are expected to be around 10 to 20 knots, before decreasing
further to around 10 to 15 knots into early next week. By the middle
of next week, winds are expected to increase to around 20 to 30
knots, before diminish to under 20 knots through the end of the
week.
Later this afternoon into the overnight hours, a few severe storms
will be possible across the western and north central half of the
lake. Strong winds and hail will be the primary threats with any of
this thunderstorm activity. The increase in low-level moisture will
also allow for fog to develop across the lake tonight in areas and
may linger through Sunday.
&&
.MQT WATCHES/WARNINGS/ADVISORIES...
Upper Michigan...
Wind Advisory until 8 PM EDT /7 PM CDT/ this evening for
MIZ001>007-009-010-084-085.
Beach Hazards Statement until 10 PM EDT this evening for MIZ014.
Lake Superior...
Gale Warning until 11 PM EDT this evening for LSZ250-251.
Gale Warning until 8 PM EDT this evening for LSZ247>249.
Lake Michigan...
Gale Warning until 11 PM EDT this evening for LMZ248-250.
&&
SHORT TERM...Ritzman
LONG TERM...Beachler
AVIATION...JLA
MARINE...RitzmanHazardous Weather Outlook National Weather Service Marquette MI 343 PM EDT Sat Jun 10 2017 MIZ014-111945- Southern Schoolcraft- 343 PM EDT Sat Jun 10 2017 This Hazardous Weather Outlook is for portions of central Upper Michigan. .DAY ONE...Tonight There is a high swim risk for the Lake Michigan beaches of southern Schoolcraft county through this evening. For more details see the latest Beach Hazard Statement. A few strong thunderstorms are possible this evening that could produce small hail and gusty winds. .DAYS TWO THROUGH SEVEN...Sunday through Friday More thunderstorms are expected late Sunday afternoon through Sunday Night. Some of the storms could be strong to severe with large hail and damaging winds. Heavy rainfall will also be possible. Additional thunderstorms are possible at times Monday through Thursday. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. MIZ011>013-111945- Dickinson-Menominee-Delta- 343 PM EDT Sat Jun 10 2017 /243 PM CDT Sat Jun 10 2017/ This Hazardous Weather Outlook is for portions of central Upper Michigan. .DAY ONE...Tonight Southwest winds may gust to 40 mph this evening. A few severe storms are possible this evening. The main hazards would be large hail and damaging winds. .DAYS TWO THROUGH SEVEN...Sunday through Friday More thunderstorms are expected Sunday afternoon through Sunday Night. Some of the storms could be strong to severe with large hail and damaging winds. Heavy rainfall will also be possible. Additional thunderstorms are possible at times Monday through Thursday. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LSZ162-240>251-263>267-111945- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM-Saxon Harbor WI to Black River MI- Black River to Ontonagon MI- Ontonagon to Upper Entrance of Portage Canal MI- Upper Entrance of Portage Canal to Eagle River MI- Eagle River to Manitou Island MI- Manitou Island to Point Isabelle MI- Point Isabelle to Lower Entrance of Portage Canal MI- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays-Huron Islands to Marquette MI- Marquette to Munising MI-Munising to Grand Marais MI- Grand Marais to Whitefish Point MI- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 343 PM EDT Sat Jun 10 2017 /243 PM CDT Sat Jun 10 2017/ This Hazardous Weather Outlook is for portions of Eastern Lake Superior...Central Lake Superior and Western Lake Superior. .DAY ONE...Tonight Southerly gale force gusts to 35 knots are expected over south central and eastern Lake Superior this evening. A few strong to severe thunderstorms are possible after 6 pm through later tonight that could produce damaging winds and large hail. .DAYS TWO THROUGH SEVEN...Sunday through Friday Thunderstorms are possible at times Sunday through Thursday. There could be strong storms late Sunday afternoon into Sunday night then again Monday night into Tuesday. Fog could become dense late tonight through Monday morning. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LMZ221-248-250-111945- Green Bay North of line from Cedar River MI to Rock Island Passage-Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 343 PM EDT Sat Jun 10 2017 This Hazardous Weather Outlook is for portions of Northern Lake Michigan. .DAY ONE...Tonight A few strong storms are possible this evening that could produce damaging winds and large hail. Gale force gusts to 35 knots are expected this afternoon into this evening. .DAYS TWO THROUGH SEVEN...Sunday through Friday Thunderstorms are possible at times Sunday through Thursday. There could be strong storms late Sunday afternoon into Sunday night then again Monday night into Tuesday. Fog could be dense at times late Sunday afternoon through Monday morning. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. MIZ001>007-009-010-084-085-111945- Keweenaw-Ontonagon-Northern Houghton-Baraga-Marquette-Alger-Luce- Gogebic-Iron-Southern Houghton-Northern Schoolcraft- 343 PM EDT Sat Jun 10 2017 /243 PM CDT Sat Jun 10 2017/ This Hazardous Weather Outlook is for portions of western Upper Michigan and central Upper Michigan. .DAY ONE...Tonight A few strong to severe thunderstorms are possible tonight that could produce damaging winds and large hail. .DAYS TWO THROUGH SEVEN...Sunday through Friday Thunderstorms are possible at times Sunday through Thursday. There could be strong storms late Sunday afternoon into Sunday night then again Monday night into Tuesday. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. Beachler
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MARQUETTE MI
445 PM EDT SAT JUN 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0414 PM NON-TSTM WND GST 4 SE NEWBERRY 46.31N 85.46W
06/10/2017 M52 MPH LUCE MI AWOS
PEAK GUST SO FAR TODAY.
0320 PM NON-TSTM WND GST MUNISING 46.41N 86.65W
06/10/2017 M46 MPH ALGER MI ASOS
PEAK GUST SO FAR TODAY.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MARQUETTE MI
521 PM EDT SAT JUN 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0454 PM NON-TSTM WND GST 1 NW KINGSFORD 45.82N 88.11W
06/10/2017 M40 MPH DICKINSON MI ASOS
PEAK GUST SO FAR TODAY.
0445 PM NON-TSTM WND GST 1 WNW MENOMINEE 45.13N 87.64W
06/10/2017 M39 MPH MENOMINEE MI AWOS
PEAK GUST SO FAR TODAY.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MARQUETTE MI
606 PM EDT SAT JUN 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0555 PM NON-TSTM WND GST 5 NW BESSEMER 46.53N 90.13W
06/10/2017 M44 MPH GOGEBIC MI AWOS
PEAK GUST SO FAR TODAY.
&&
KLUBERSpecial Weather Statement
National Weather Service Marquette MI
652 PM EDT SAT JUN 10 2017
MIZ001-102345-
Keweenaw MI-
652 PM EDT SAT JUN 10 2017
...SIGNIFICANT WEATHER ADVISORY FOR ISLE ROYALE UNTIL 745 PM EDT...
At 650 PM EDT, Doppler radar was tracking a strong thunderstorm 16
miles southwest of Thunder Bay Ontario, or 34 miles northwest of
Siskiwit Lake, moving east at 60 mph.
Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.
Locations impacted include...
Mott Island Park Headquarters, Siskiwit Lake, Rock Harbor and Mount
Desor.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 4819 8832 4813 8833 4789 8869 4776 8907
4779 8922 4790 8935 4792 8934 4819 8871
TIME...MOT...LOC 2250Z 272DEG 60KT 4821 8949
KluberSpecial Weather Statement
National Weather Service Marquette MI
845 PM EDT SAT JUN 10 2017
MIZ001-003-110130-
Keweenaw MI-Houghton MI-
845 PM EDT SAT JUN 10 2017
...SIGNIFICANT WEATHER ADVISORY FOR KEWEENAW AND NORTHERN HOUGHTON
COUNTIES UNTIL 930 PM EDT...
At 844 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles northwest of Calumet to 12 miles west
of Redridge. Movement was east at 55 mph.
Half inch hail and winds in excess of 40 mph will be possible with
these storms.
Locations impacted include...
Houghton, Calumet, Eagle Harbor, Copper Harbor, Eagle River,
Hancock, Laurium, Lake Linden, South Range, Brockway Mountain, Bete
Grise, Houghton County Airport, Lac La Belle, Dollar Bay, and Mohawk.
LAT...LON 4742 8752 4728 8798 4706 8828 4709 8898
4748 8829 4752 8795
TIME...MOT...LOC 0044Z 258DEG 47KT 4732 8853 4717 8902
KluberSpecial Weather Statement
National Weather Service Marquette MI
901 PM EDT SAT JUN 10 2017
MIZ002-003-084-110145-
Ontonagon MI-Houghton MI-Southern Houghton MI-
901 PM EDT SAT JUN 10 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN HOUGHTON AND NORTHERN
ONTONAGON COUNTIES UNTIL 945 PM EDT...
At 900 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 15 miles west of Redridge to 15 miles north of
Bessemer. Movement was east at 55 mph.
Half inch hail and winds in excess of 40 mph will be possible with
these storms.
Locations impacted include...
Ontonagon, Chassell, South Range, Rockland, Mass City, Nisula,
Silver City, Greenland, Twin Lakes, Jacobsville, Fourteen Mile
Point, Lake of the Clouds, Victoria Dam, Tapiola, White Pine, Winona
and Alston.
LAT...LON 4670 9017 4690 8956 4691 8948 4712 8889
4704 8817 4685 8847 4694 8845 4694 8855
4685 8855 4685 8868 4673 8868 4666 8880
4669 8987 4677 8988 4670 8999
TIME...MOT...LOC 0100Z 263DEG 49KT 4709 8908 4670 9014
KluberThe Marquette radar (KMQT), 111 km away, was scanning. The volume nearest the first event began at 01:04 UTC.
6 thunderstorm wind. Local standard time, as filed.
Trees were reported down on power lines and across Highway M-203. Time of the report was estimated from radar.
Power lines were reported down in Calumet. Time of the report was estimated from radar.
There was a public report of a metal shed flipped over in Calumet by thunderstorm winds.
A tree was reported down across Highway M-26. Time of the report was estimated from radar.
There was a delayed report of multiple trees down on Forest Highway 16 in Ontonagon County between Mass City and Nisula. Time of the report was estimated from radar.
There was a delayed report from the Baraga County Fire Department of small trees blown over and branches broken off trees in L'anse.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2017Every state in 2017This day in weather historyWarnings in Michigan, June 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 707395, 707400, 707401, 707399, 707409, 707403.