...First Significant Snowfall for Portions of the Area...
...December 9, 2008...


A series of potent upper level storms wrapping around a rather large upper level trough of low pressure produced a wide range of rain and snowfall totals across the lower Missouri River Valley region during the 8th and 9th of December. As you can see in the image below, the track of these upper storm systems generally stretched from the four corners region through Oklahoma and then northeast into the Ohio River Valley.  One system passed through the region during the nighttime hours of the 8th, with many areas to the south and east of a Kansas City to  Kirksville line receiving upwards of an inch of rainfall.


 Synoptic Summary - December 9, 2008
 Click on Image for Larger Version


By the morning of the 9th, a stronger piece of energy lifted out of the four corners region, developing a band of snow across Northern Oklahoma, Southeastern Kansas, and into Missouri.  The snow started across portions of Johnson and Linn counties of Kansas around 10:30 am Tuesday.  At one point a strong banded area of snow developed along areas from Ottawa, KS northeast through Olathe, Lees Summit, MO and Kirksville, MO.  Visibilities under this band of snow were reduced to one half mile or less in some locations with snowfall rapidly accumulating.  You can see just how strong the snow was in the series of images below with reflectivity values above 40 dbz and several pockets of very cold cloud tops.


Radar Imagery - December 9, 2008 1809Z Satellite Imagery - December 9, 2008
Radar Imagery - December 9th, 1809Z Regional Satellite Imagery - December 9th, 2008

Snow, light to moderate at times, continued across the region through the afternoon hours, quickly dissipating by the evening of the 9th.  By time the snow ended, the heaviest accumulations were located along this earlier mentioned stationary band of snow.  2-4 inches of snow were common from Ottawa, through the southeastern Kansas City metropolitan areas and further northeast into Chillicothe and Kirksville. The highest local snowfall observations were found in Lees Summit, MO and Paola, KS where 4.0 inches of snow  recorded at both locations.  On either side of this line, snow amounts were lower, with 0.4 inches of snow at Kansas City International Airport, to as little as a trace of snow in Sedalia.   Below you will find graphics of snowfall estimates as well as a visible satellite imagery from the morning of December 10th, clearly showing where snow fell during this event.

Estimated Snowfall Accumulations  Visible Imagery - December 10, 2008
 Estimated Snowfall Accumulations Visible Satellite Imagery, Morning of December 10th



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