SPC MD 1829



MD 1829 CONCERNING SEVERE THUNDERSTORM WATCH 609… FOR PORTIONS OF NEW ENGLAND

MD 1829 Image

Mesoscale Discussion 1829
NWS Storm Prediction Center Norman OK
0520 PM CDT Wed Aug 21 2019

Areas affected...portions of New England

Concerning...Severe Thunderstorm Watch 609...

Valid 212220Z - 220015Z

The severe weather threat for Severe Thunderstorm Watch 609
continues.

SUMMARY...The severe threat continues across much of WW609 with
severe wind as the primary threat. Large hail and a brief, weak
tornado or two are possible as well.

DISCUSSION...Storms continue to move and develop eastward across New
England ahead of an upper-level shortwave trough. A mixed storm mode
is evident with a broken line of storms stretching from southwest
Maine to south of Albany along a surface pressure trough and
discrete cells developing within the warm sector ahead of the line.
MLCAPE 1000-1500 J/kg and 30-40 knots of effective bulk shear will
support some weaker supercells and a few of those have been observed
across New England in the last hour. 

While damaging wind is the main severe threat, marginally large hail
and a brief, weak tornado are possible with any of the stronger,
especially discrete, cells. Areas with more of a easterly component
in the surface wind will increase hodograph curvature/low-level SRH
and be the favored location for these stronger storms. The severe
threat will diminish from west to east as storms moves eastward into
the evening.

..Nauslar/Grams.. 08/21/2019

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM...

LAT...LON   40567452 41907438 42657348 43327210 43687143 43747075
            43517023 42937018 42177022 41647024 41367036 41167058
            41047099 40607338 40467409 40567452 

Read more



Source link