The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
western and central Massachusetts
southern New Hampshire
eastern New York
* effective this Wednesday afternoon and evening from 100 PM
until 1000 PM EDT.
* Primary threats include...
several damaging wind gusts to 70 mph possible
several large hail events to 1.5 inches in diameter possible
The Severe Thunderstorm Watch area is approximately along and 90
statute miles east and west of a line from 40 miles north of
Burlington Vermont to 20 miles south southwest of Monticello New
York. For a complete depiction of the watch see the associated
watch outline update (wous64 kwns wou0).
Remember... a Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings. Severe thunderstorms can and occasionally
do produce tornadoes.
Discussion... forcing associated with a weak upper impulse appears to
be contributing to ongoing vigorous storm development now moving
into/spreading across the Catskill region of New York. This
activity is expected to develop eastward across the Hudson Valley
into New England this afternoon... with additional storms developing
in the warming and destabilizing boundary layer to the west... before
spreading eastward. Moderately strong and sheared deep layer
westerly flow is sufficient for supercell structures in the presence
of weak to moderate cape... which will enhance the risk for severe
hail and strong surface gusts.
Aviation... a few severe thunderstorms with hail surface and aloft
to 1.5 inches. Extreme turbulence and surface wind gusts to 60
knots. A few cumulonimbi with maximum tops to 500. Mean storm
motion vector 27030.