Sunday, December 21, 2008

Forecast

Winter storm coming to an end across much of the FA this morning...We still will be dealing with off and on areas of light snow through out the day...LES machine has kicked in so will have to run with another 3 to 5 inches of snow for the WI snow belt areas...Other than that temps will be a problem,along with wind-chills.Then yet another system to spread more snow across much of the FA....I did trim temps down a degree or two across the FA...
Current Conditions...
Radar still showing snow through out much of Northeastern MN,as well as Northern WI...LES snow band also showing up rather well this morning...Temps took a hit last night as SFC OBS showing most stations well below 0 at this hour..Winds remain rather gusty with some station across MN reporting winds gusting up to 20 to 25 MPH leading to wind-chills values from 30 to 40 below..Winds a tad lighter in WI ranging from 9 to 18 with gusts up to gusts up to 20 MPH...Here at the office winds are 9 MPH with gusts up to 17 MPH wind-chill here is at 30 below...
SFC Analysis....
Low pressure that brought accumulating snows across the FA area yesterday and last night in now over far Eastern WI...Strong Arctic high pressure over MT ...Pressure gradients between this two system will keep the winds up today....
Today....
Said low above is forecasted to move into Eastern MI by 12Z Sunday..This low is going to drop a trof into the far Northeastern tip of MN and then through our WI FA...This trof will keep the chances for light snow going...Little in the way of accumulation is forecasted...Maybe close to an inch most areas...Far Northeastern MN could pick up 1 to 2 inches of snow...In our snow belts of WI LES might become a problem,here we are forecasting another 3 to 5 inches of snow through out the day...Meanwhile Strong Arctic high pressure over MT...This thing has a MB reading of 1044...Strong high to our West and Low to our East pressure gradients stay up,so a windy day on tap...This will lead to blowing and drifting snow..Also one might run into areas with close to white out conditions,in the rural areas..
Tonight....
Arctic high pressure slowly starts to build in...I do have the forecast with mostly cloudy wording,however I would not be shocked to see some areas clear out sometime tonight...Winds will slack off,however with temps dropping well into the teens below and some twenties below wind-chill values will still be a factor...
Monday...
Arctic high pressure in full control of our weather will insure us a mostly sunny day..Temps will remain in the single digits on either side of 0...I kept them above 0 in the forecast...A much needed break in the snows...That won't last very long....
Monday Night through Tuesday....
Another storm system has it eyes set on the FA...Looking at the WV this morning we find the system off the coast of British Columbia Canada...This system is forecasted to move into ID by 06z Monday..A trof will move into the area Monday night through Tuesday this will once again lead to some accumulating snows...Right now looks like a range of 2 to 5 inches will be possible across the FA...
Temps will be up and down through the Forecast period...Slightly warmer air for Christmas day with another shot at some snow...Models having a hard time with that possible system....