The same storm system that brought deadly tornadoes to the Tennessee Valley yesterday has brought another round of heavy snow to Upper Michigan. Given the track of the low pressure system, much of the heavy snow fell in a short period across northern portions of Lower Michigan. An average 10 to 20 inches of snow fell across northern Lower Michigan, with a max of 17 to 21 inches near Long Lake. Click here for specific amounts across northern Lower Michigan. Enhanced by north to northeasterly winds off of Lake Superior, the higher terrain locations of central and eastern Upper Michigan also received heavy snow. Initial storm total snowfall amounts, over 20 inches in a few spots, over Upper Michigan can be found viewing our latest Public Information Statement. Don't see your report? Click here to submit your own observed snowfall report!
Below is a series of surface maps depicting the movement of the low pressure system from early Friday afternoon (March 2nd) over southern Illinois, to central Lake Huron early Saturday morning (March 3rd), and far southern Quebec late Saturday morning.
The following is a series of radar snap shots from roughly 10am, noon, and 2pm Saturday. Given the north to northwesterly wind component off Lake Superior, terrain had a significant impact on snow amounts. For comparison, we've included the image of the local terrain on the bottom right. Notice how higher reflectivity (snowfall intensity) correlates with the enhanced terrain near Lake Superior in north central Upper Michigan.
Looking at the Marquette 88-D Radar also helps us estimate snowfall amounts across the region. Here is an image taken from Saturday afternoon showing the radar estimated snowfall across Upper Michigan. Note, these are not actual snowfall amounts, but rather radar estimated values. To get actual snowfall amounts, we rely on ground truth (public observations, other government agencies, and automated weather stations).
As a comparison, here is a quick map of the observed snowfall totals from around Upper Michigan. As you can see, the radar did a fairly good job of estimating the snow depth based on the storm total snowfall.
Again...for more specific reports...go to the latest PNS.
Some Pictures From Our Office: Current Snow depth (March 4 at 3 PM EST): 47 inches