QPF still in line for widespread 1.00+" with peak water content expected mainly to the north and west of us (approaching 2.00") in portions of New York and VT. The track on the GFS and Euro have not wavered much at all. Still brings low pressure over southeast MA, allowing warm air to flood the mid levels. Precipitation should begin as all snow even along the south coast.
FOR SOUTHERN NEW ENGLAND:
CT, RI coastline in 10 miles, MA cape and islands:
Beginning as a period of wet snow between 1am and 5am, mixing with and changing to sleet around 5am, freezing rain shortly thereafter. Plain rain by 8am. Some very light backlash snowfall possible Sunday Night. Snow accumulation: 0 - 2", Ice accumulation: .1".
NE CT, N RI, E MA:
Snow starting up by 4am. Will mix with sleet and freezing rain by 9am. A change to plain rain is likely after 1pm. Changes back to snow by 8pm, with additional light accumulation. Snow accumulation: 2" - 4", Ice accumulation: .25" - .4"
C MA S of I90, NW CT:
Snow between 2am and 11am. Sleet after 11am, changing to freezing rain after noon. A period of plain rain likely after 2pm, followed by some light backlash snow showers Sunday Night. Snow accumulation: 4" - 7", Ice accumulation: .25 - .45"
C MA N of I90, SE NH:
Snow between 4am and 1pm. Sleet between 11am and 2pm. Freezing rain starting around 2pm, changing to plain rain between 3pm and 8pm. Moderate backlash snows ending by midnight. Snow accumulation: 5" - 9", Ice accumulation: .2" - .35"
NW MA, SW NH:
Snow between 3am and 2pm. Sleet mixing in around 11am. Freezing rain mixing in by 2pm. Freezing rain and sleet through 8pm, followed by moderate backlast snows ending around 1am Monday. Snow (and sleet) accumulation: 7" - 14", Ice accumulation: .1".
Snow forecast for Keene for 00z Sunday - 12z Monday: 8" - 14"
Factors that could change this map:
- If primary low stays weaker and further south, not phasing with tropical energy until late, low tracks more eastward.
- Secondary low develops earlier and further southeast.
- High pressure in SE Canada is stronger than forecasted.
|posted by Sam Lillo @ 12/14/2007 07:42:00 PM
