Low pressure originating over the southern Plains deepened rapidly as it moved into the Great Lakes region on the afternoon and evening of the 16th.  Deep moisture associated with this system brought heavy synoptic and lake-enhanced snow to portions of central Upper Michigan on the 16th and 17th.  Measured 12-hour snowfall amounts included 6 inches in Gladstone and Cornell in Delta County, 7 inches in Menominee, 7 inches at Cooks in southern Schoolcraft County and 8 inches at Rainbow Lodge in Luce County. 24-hour lake-enhanced snowfall amounts included 16.7 inches at the National Weather Service in Marquette, 13 inches south of Grand Marais in Alger County and 10 inches at Seney in northern Schoolcraft County.  A blast of arctic air behind the departing low brought another round of briefly heavy lake effect snow and near-blizzard to blizzard conditions to western Upper Michigan on the 17th and 18th.  Snowfall amounts generally ranged from 3 to 6 inches across much of Ontonagon, Houghton and Keweenaw counties while wind gusts of 30 mph or more lowered visibilities to one-half mile or less.  Frequent wind gusts to 35 mph or more and visibilities below one-quarter mile lead to blizzard conditions over the Keweenaw Peninsula during the afternoon hours.  Wind chill values also fell to 35 to 45 below zero at the automated observing sites at Ironwood, Iron Mountain and Escanaba on the evening of the 17th and morning of the 18th.   Across the rest of west and central Upper Michigan wind chill readings commonly fell into the 25 to 35 below zero range.

Winter Storm in MARQUETTE, MICHIGAN
From 16-FEB-06 12:00:00 to 17-FEB-06 07:00:00 (EST)
Reported by: OFFICIAL NWS OBS.

Cold/Wind Chill in SOUTHERN HOUGHTON, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in NORTHERN HOUGHTON, MICHIGAN
From 17-FEB-06 09:00:00 to 17-FEB-06 13:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Storm in SOUTHERN HOUGHTON, MICHIGAN
From 17-FEB-06 09:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Storm in DELTA, MICHIGAN
From 16-FEB-06 10:00:00 to 16-FEB-06 21:00:00 (EST)
Reported by: TRAINED SPOTTER

Cold/Wind Chill in ONTONAGON, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Cold/Wind Chill in SOUTHERN SCHOOLCRAFT, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Cold/Wind Chill in MARQUETTE, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Cold/Wind Chill in NORTHERN SCHOOLCRAFT, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in ONTONAGON, MICHIGAN
From 17-FEB-06 09:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: TRAINED SPOTTER

Cold/Wind Chill in BARAGA, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Cold/Wind Chill in MENOMINEE, MICHIGAN
From 17-FEB-06 22:00:00 to 18-FEB-06 08:00:00 (CST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in LUCE, MICHIGAN
From 16-FEB-06 14:00:00 to 17-FEB-06 18:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Storm in NORTHERN SCHOOLCRAFT, MICHIGAN
From 16-FEB-06 12:00:00 to 17-FEB-06 18:00:00 (EST)
Reported by: TRAINED SPOTTER

Cold/Wind Chill in KEWEENAW, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in SOUTHERN SCHOOLCRAFT, MICHIGAN
From 16-FEB-06 10:00:00 to 16-FEB-06 23:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Storm in ALGER, MICHIGAN
From 16-FEB-06 12:00:00 to 17-FEB-06 18:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Storm in KEWEENAW, MICHIGAN
From 17-FEB-06 09:00:00 to 17-FEB-06 13:00:00 (EST)
Reported by: TRAINED SPOTTER

Cold/Wind Chill in LUCE, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Cold/Wind Chill in IRON, MICHIGAN
From 18-FEB-06 02:00:00 to 18-FEB-06 08:00:00 (CST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in MENOMINEE, MICHIGAN
From 16-FEB-06 07:00:00 to 16-FEB-06 20:00:00 (CST)
Reported by: TRAINED SPOTTER

Cold/Wind Chill in NORTHERN HOUGHTON, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Winter Storm in KEWEENAW, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 13:00:00 (EST)
Reported by: TRAINED SPOTTER

Cold/Wind Chill in GOGEBIC, MICHIGAN
From 17-FEB-06 18:00:00 to 18-FEB-06 08:00:00 (CST)
Reported by: AWOS,ASOS,MESONET,ETC

Cold/Wind Chill in DICKINSON, MICHIGAN
From 18-FEB-06 02:00:00 to 18-FEB-06 08:00:00 (CST)
Reported by: AWOS,ASOS,MESONET,ETC

Blizzard in NORTHERN HOUGHTON, MICHIGAN
From 17-FEB-06 13:00:00 to 17-FEB-06 23:00:00 (EST)
Reported by: TRAINED SPOTTER

Blizzard in KEWEENAW, MICHIGAN
From 17-FEB-06 13:00:00 to 17-FEB-06 23:00:00 (EST)
Reported by: TRAINED SPOTTER

Winter Storm in NORTHERN HOUGHTON, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 13:00:00 (EST)
Reported by: TRAINED SPOTTER

Cold/Wind Chill in DELTA, MICHIGAN
From 18-FEB-06 03:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC

Cold/Wind Chill in ALGER, MICHIGAN
From 17-FEB-06 23:00:00 to 18-FEB-06 09:00:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC