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Mesoscale Discussion 0743
NWS Storm Prediction Center Norman OK
0127 PM CDT Wed May 27 2020
Areas affected...Northern Vermont...Northern New Hampshire...and
western/northern Maine
Concerning...Severe potential...Watch unlikely
Valid 271827Z - 272000Z
Probability of Watch Issuance...5 percent
SUMMARY...An isolated strong storm or two is expected through the
afternoon. Occasional damaging winds are possible.
DISCUSSION...Unseasonably hot temperatures in the upper 80s to low
90s and dewpoints in the mid 60s have led to weak instability from
northern New York through northern Maine. Warm temperatures aloft
(around -9C at 500mb per 12Z ALB/CAR RAOB) are the primary limiting
factor to greater instability. Despite this, storms have developed
from terrain circulations over the mountains of VT/NH and ahead of a
weak shortwave moving toward northern Maine. Storm motion is very
slow and shear is weak (< 15 knots) given the weak tropospheric
flow. Therefore, storm organization will likely be limited, but the
steep low-level lapse rates and well-mixed sub cloud layer will
support some strong downbursts. As a result, a few isolated damaging
wind gusts are possible, especially with any stronger storms.
..Bentley/Hart.. 05/27/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CAR...GYX...BTV...
LAT...LON 44197313 45227153 46147039 47356951 47536843 47356776
46856722 45706802 44597011 43997108 43587231 43767293
44197313
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