Lake Effect Summary - April 4-8, 2007
Maximum Snowfall: Lake Erie 26"
(Perrysburg); Lake Ontario 38" (Redfield)
Duration: 90 hours +/-
long lasting out of season event. Strong diurnal flavor.
This event capped off a memorable 2006-07 season as one of the most intense and long lasting cold periods for so late in the season set off some
impressive lake snows east and southeast of the Lakes.
This combined with the massive October storm to bracket the winter season with the earliest and latest events on record.
The event began late Wednesday the 4th following a sharp cold front. A massive upper level low then set up over Quebec and poured near
record cold across the eastern two thirds of the nation for several days. Most of the Lakes were open again after mild weather in late March, but
eastern Lake Erie still had a good deal of ice cover. Still, the moist northwest flow brought residual moisture from the Upper Lakes and impinged
on the Chautauqua ridge and dropped up to a foot of upslope/lake enhanced snow there. Several inches also fell down into the Jamestown area.
For the next few days, lake snows became more organized during the late night and early morning periods, breaking up into cellular activity during
the afternoon and early evening hours. The heavier accumulations were at night. The Thursday night-Friday morning period brought 6-12" to much of
Oswego county and southern Tug Hill and also another 6 to 12 across Chautauqua county, and a surprise 4 to 7 inches across Niagara County. Then,
Friday night-Saturday morning period saw an intense band across southern Jefferson county, with somewhat of a repeat along the south shore of the
Lake Saturday night and Sunday morning. During the afternoon and early evenings, brief heavy snow showers occurred, but accumulated little.
Conditions finally moderated enough to shut down any lake snows late Sunday as inversion lowered and 850 mb temps rose slightly.
The totals were impressive, but settled fast due to the season, so no more than a foot was on the ground at any one time anywhere. Very little fell
in the Buffalo area, and Rochester caught a bit only Sunday morning.
This event was long lasting and out of season. The totals were impressive, but fell mainly at night in light populated areas, melting off on roadways during the day.
It therefore earns
three *** stars.
Here are some representative
Off of Lake Erie...
||less than 2 inches
Off of Lake Ontario...
||2 to 4 inches