Posted at 6:31 AM on December 3, 2011
by Craig Edwards
Moisture continues to push north through Iowa toward MInnesota this morning. Temperatures are borderline for freezing rain/sleet and snow from Rochester to Preston when the precipitation begins to reach the ground around mid morning.
Here is a look at the Advisories posted by the National Weather Service Offices at Chanhassen and La Crosse, Wisconsin. The blue shaded area is for snow accumulations from 2 to 6 inches. The pink shaded area is for freezing rain changing to snow later today.
Follow the storm details from the Chanhassen NWS Office here.
Track the reports out of far southeast Minnesota and southwest Wisconsin here from the La Crosse NWS Office.
The Twin Cities remain on the northern fringe of the snow band. The greatest accumulation during the next 18 hours will be closer to Farmington. Snow may accumulate about an inch in Blaine.
NOAA's Environmental Prediction Center suggests that there is a small probability of snowfall approaching eight inches in parts of southeast Minnesota. Here's their latest thinking.
Based on an integration of the model data, it looks like the heaviest snow is likely to fall from mid afternoon through about 10PM. Radar imagery can be monitor by clicking on the image to the right of the blog.
This infrared satellite photo from around 6AM depicts the coldest cloud tops in the blue color. So far a clear signal of the snow pattern has yet to present itself.
While snow is likely to accumulate several inches, strong winds are not expected.
Satellite imagery, Doppler radar and surface reports were confirming that snow was increasing in Iowa and has now crossed into southern Minnesota. Shortly after the noon hour snow was reported at Preston in southeast Minnesota.
This enhanced water vapor satellite image indicated cloud tops cooling and a deeper moisture layer advancing across western Iowa. I believe this is associated with the stronger upper level dynamics that will produce heavier snow in southeast Minnesota this afternoon and into early tonight.
A Winter Weather Advisory is in effect through tonight roughly south of a line from Worthington to Hayward, Wisconsin. Expect heavier snow to accumulate from about 3PM to 10PM. By midnight snowfall totals should range from one inch in Monticello to as much as six inches in Waseca.
I've been sorting through the short term model data this morning. Here's a pretty good graphic from the High Resolution Rapid Refresh model displaying the expected snowfall from noon to about midnight. Note the potential for more than six inches in the yellow color.
Track the snowfall reports from the Chanhassen NWS Office from this web link.
Drive safely if you are out and about southeast Minnesota the remainder of the afternoon and tonight.
Posted at 9:17 PM on December 3, 2011
by Craig Edwards
Here is a snap shot of the regional radar shortly after 9pm. The brighter band of precipitation from about New Richmond, Wisconsin through the Twin Cities to New Ulm depicted the heavier snowfall.
Before shoveling the driveway, I measured 2.5 inches outside the Eden Prairie weather lab at 9pm. Light snow was still falling
The area of snow is expected to continue slowly tracking east overnight. But an additional two inches could fall from just east of the Twin Cities down to Owatonna before 1am.
Cold temperatures will follow in the wake of the snow. It really is quite lovely outdoors this evening, if you don't have to travel. Get out and enjoy the fresh, high quality snow on Sunday.
Snowfall totals in southeast Minnesota from Anoka to Preston will likely range from two to six inches by 1AM.