MIDWEST WEATHER SERVICE -- STORM CENTER
STEVENS POINT, WI
WINTER CYCLONE DISCUSSION
WINTER STORM ANDREA DISCUSSION NUMBER 004
MWS STORM CENTER STEVENS POINT/WHITING WI
800 PM CST THU DEC 27 2018
As is the case with many winter storms of recent years gone by, Andrea is no different. Already peaked with it's intensity
earlier today before significant dry slotting and shear aloft has nearly ripped this storm apart! The dry slotting is very
evident on surface data and also on satellite loops. Much of Andrea's middle and high clouds have now been displaced
well to the east of the center. However, deformation zone clouds and precipitation do continue across a large portion of
central and northern Minnesota and northwest Wisconsin. This precipitation and strong surface wind gradient on the
back side of the center of circulation, should result in considerable blowing and drifting problems. Meanwhile, to the
south and east, drier air has arrived thus shutting off much of the precipitation. Total snowfall should range from 4 to 8
inches across Minnesota.
Andrea appears to be moving a bit more north of due northeast, largely modulated by the mid level flow rather then the
higher altitude winds. Since that support aloft has been sheared east, the center is being pushed by the mid level flow.
Have not made any major tweaks to earlier track forecasts since the system may return to that projection at anytime. It
does appear now that Andrea may loose it's storm status by some time tomorrow due to rapid dissolvement of the storm.
Page Last Updated: 800 PM CST THU DEC 27, 2018