Saturday, December 6, 2008

Forecast

For the most part did leave previous forecast stand,just a few tweaks made...Forecast is cut and dry until about the Wednesday's time frame...
Current Conditions...
Radar at this hour still showing bands of light snow and flurries moving through the area,except this trend through out the early morning hours..Cloudy skies being reported at all the stations,with light snow and flurries also..Winds have been around the 10 MPH with gusts up to 25 MPH and some spots closer to 30 MPH..Our WI stations winds still not as high as those in MN,nonetheless wind gusts up to 2O MPH at some stations..Temps at this 6 AM hour are in the middle teen in WI to the lower to middle teens in MN...Some station up in the tip of MN coming in in the upper single digits.
SFC ANALYSIS...
The clipper like system that has brought most areas 1 to 2 inches of snow is now pushing well into WI..LES is in full swing as winds are out of the North....S0 here is where we find the highest snowfall amounts...Winds have picked up through the over night hours as pressure gradients increases between the departing low pressure and a 1028 MB high pressure over Southern Canada,as the high pushes into the area expect winds to slowly die down,also skies should become partly cloudy as we head into the afternoon....Setting the stage for a very cold night across the Northwood's...
Today through tonight...
Low pressure moving away from the area...Winds will slowly taper off as we head through the day into tonight...Will keep snow alive this morning but this should also taper off as we get closer to the noon hour,will keep the LES machine going in our WI snow belt areas....Clouds shall also be saying good bye to us as we head towards this evening....1026 MB high pressure builds into the area,wind becoming light to clam and skies becoming clear,along with the fresh snow cover..Temps will dive to their coldest readings thus far this winter...Many areas will see temps well below 0 tonight...Thinking is this will happen before midnight...With WAA already knock on the door step temps may slowly start to raise after midnight...
Sunday through Monday...
Still another clipper system to effect the area..1012 MB low pressure is forecasted to drop out of Canada and into MN. This track is a little more west that it's predecessor...So will go with less snow in our Northern areas of MN...System should produce another 1 to 3 inches of snow across our Central and Southern areas...Up in Northern MN less than inch is forecasted..However areas around the North Shore may pick up more,as the winds will be from the South...Something we will watch through the day and tonight...Monday shall see some off and on light snow as a cold front still close to the area and some weak lift indicted by models...
Tuesday and Tuesday night...
Cold and dry is the way to sum this up as high pressure sits over the area...Still some LES snows possible in our Northern areas of WI...
Wednesday through Thursday...
He is were things get more complex...GFS has a low pressure forming over the TX Panhandle Tuesday/Tuesday night....This low is than forecasted to move into Southern MO then into the Northeastern States...Meanwhile a clipper like system is forecasted to move South into SD....Looking at the ECMWF model the forecasted track of system above is a little more west,Still thinking attm is this system won't have any effect of the FA..Just the clipper like system will indeed produce some snow....One thing is for sure this time frame will be colder that tonight...
Longer term....
We will be watching a storm system form over the Southwestern States ECMWF model shows a 997 MB low pressure over the Western part of the TX Panhandle on Monday Dec 15th..This system is forecasted to push rather fast Northeast to about North Central WI by Tuesday..as it does the ECMWF shows the low deepen to around 994 MBS...Lets see what the GFS model is saying about this shall we....GFS is basically on the same page,however GFS has this storm system weaken some as it pushes,also has the track a little more East than ECMWF...If both these models forecast are right,we good be dealing with our first real snow storm of the this winter...This is still way out there...But we will keep an eye on it as we go through the upcoming work week.....