A clipper system moving through the Great Lakes will spread snow into the region tonight. Secondary low pressure will develop to the south of the region and move northward early Saturday morning. The coastal low will enhance precipitation, producing a 3 to 4 hour period of moderate to heavy snow likely between 3am and 8am Saturday. Snow will lessen in intensity and taper off by 3pm Saturday. Surface temperatures between -7C and 0C through the event, with strong omega in the -12C to -16C range will produce snow ratios between 14:1 and 16:1. Wate equivalent is the main determining factor at this time. There has been strong consensus from numerous model runs that .4+" is likely. Much is dependent on when and where the secondary low develops. The most recent trend in the models has been a subtle shift to the north and east, which would diminish water equivalents slightly. At this time, I expect .4" to .6" of water equivalent.
Snow accumulation forecast: 6" - 9"
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A very intense storm system is likely early next week. This is likely to be a lakes cutter, resulting in a period of above normal temperatures and heavy rain. Precipitation may change to snow behind the storm before ending, however, accumulations are likely to be minor.
|posted by Sam Lillo @ 2/29/2008 11:14:00 AM
