LAKE EFFECT STORM "ILAMA"

March 9-10, 2005

Lake Flake scale: * 1 Flake

 

Maximum Snowfall: Lk. Ontario: 10" (West Monroe).

Duration: 15 Hours +/-

Prime Feature: Great parameters, diurnal late season, migrating bands.

Lake Flake Scale: * 1 Flake

The ninth lake effect event of the season was a marginal but well forecasted event. Conditions appeared prime for a major event east and southeast of the lake and warnings were issued a good 24 to 36 hours ahead of time. However, totals just barely made warning criteria as the bands, after they set up, were rather transitory.

The activity developed late in the afternoon of Wednesday the 9th as a well aligned 290 flow set up across Lake Ontario. The diurnal effects of the strong March sun held this at bay for awhile, but the airmass was so cold (-22c 850s) that the activity got going before dark. There even was an upstream connection from the upper lakes during the evening as the band intensified. Winds veered a bit more than expected however, so the activity pushed a bit further south toward midnight, along the shore of Orleans and Monroe counties, before lifting north again toward daybreak. The activity continued into Thursday morning, then lifted north in a weakened state across Lewis and Jefferson counties during the day as winds backed.

Amounts averaged 6 to 10 inches across most of Oswego and far southwest Lewis counties, with 4 to 8 inches westward across Wayne county to near Webster.

Little activity was observed off Lake Erie during this event. The Lake is mainly frozen, but some upsloping did allow for a couple inches over portions of ski country.

This event was just marginally heavy enough to classify. It earns * 1 Star * 

 

Off Lake Ontario 

West Monroe

10 inches
Constantia 9 inches
Webster 8 inches
Hannibal 7 inches
N. Osceola 6 inches
Fair Haven 5 inches