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- Rutland Lake Effect Event
- 29 October 2006
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- Movement/Development of mid/upper level circulation
- Cloud layer winds strong enough to push lake effect band into Rutland
County
- Temp profile and low level wind field on development of lake effect band
- Would warm BL temps prevent significant snowfall accumulations
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- Strong 925mb to 850mb winds of 40 to 50 knots helped advect lake effect
snow band across Dack into the Western Slopes of the Green Mtns
- Unidirectional flow from 270˚ through 700mb helped to enhance
upslope component
- 12z soundings from (Aly and Buf) showed deep/well mixed layer through
500mb with steep sfc to 700mb lapse rates
- The column had moisture with PWS around 0.50”
- Warm BL temps prevented significant snow accumulation at Rutland…however
Killington received 6 to 8 inches
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- In addition…soundings showed plenty of moisture in the favorable
dentritic snow growth region…which according to the pictures lead to
large flake size
- Very warm lake water temps combined with an unseasonably cold air-mass
…provided increased amounts of instability and favorable dynamics for
significant lake effect…with thunder/grapuel being reported near Oswego
- Well channeled flow from sfc to 250mb associated with cutoff circulation
moving from Eastern Great Lakes into Southern Canada helped to propagate
lake band 200 to 300 km down wind of Lake Ontario
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Notes
