EFFECT STORM "IRIOMOTE"
scale: * 1 Flake
Maximum Snowfall: Lk.
Erie: 4" (E. Aurora). Lk. Ontario: 11" (Hooker).
Duration: 12 Hours +/-
Prime Feature: Brief post-frontal event.
Lake Flake Scale: * 1 FlakeAfter an
absence of a month, enough cold air wrapped around a departing low to produce a
brief lake effect event late on 18th and early 19th.
Rain changed to snow from west to east during the afternoon of the 18th
and gusty winds produced slippery conditions. Most areas received an inch or
less of general snow, but as the cold air deepened, the snow became lake
enhanced and then just "effect" for several hours in the evening off
and overnight off
. 850 mb temps were only marginally cold enough, in the -9C range off
but did fall to -12C off
Ontario, creating just enough instability over the 2-3C open lakes. Other lake
parameters were favorable, good moisture and relatively high inversion. But,
warm advection quickly moved in later at night and early Thursday (19th)
to shut down the process. Winds were very strong, at 50-55 kts just off the
deck, and this may have contributed to the broken up bands off
which got all the way into the
Snowfall totals ranged from 2 to 4 inches from just south of
Rochester, and over 6 inches on the Tug Hill. Nothing extreme, but after a month
of unseasonably and almost record mild weather, this was a quick and brief
return to reality. It was also a rare event for
to have more impact on
than it did on
was another brief event with little impact. It affected little population so
earns just * 1 Star *.