As suggested, strong lift combined with abundant moisture in the snow growth zone is supporting large flakes that are accumulating quickly. At my house at 1000ft, already amounts are approaching 2". Snow, heavy at times, will continue through noon, with totals of 4-5" below 1000ft to 5-8" above 1000ft.
The next storm system of interest is currently developing in the southwest, and will lift northeast toward the Great Lakes region tomorrow and tomorrow night. We will have high pressure to our north again, but it will be retreating as warm advection moves into the region. Precipitation will begin overspreading the area after 9pm, in the form of snow. Around an inch of accumulation is possible before mixing with and changing to sleet and freezing rain after midnight. Freezing rain, sleet, and rain will continue through 9am Wednesday until warm aid advection completely scours out all cold air. Precipitation rates will be fairly light, but that is all the more dangerous when it comes to freezing rain. Ice accretion around a tenth of an inch is possible by the time of the morning commute.
|posted by Sam Lillo @ 3/09/2009 05:24:00 AM
