ZCZC SPCSWOMCD ALL
ACUS11 KWNS 142337 
SPC MCD 142337 
MDZ000-WVZ000-VAZ000-150130-

Mesoscale Discussion 0974
NWS Storm Prediction Center Norman OK
0637 PM CDT Mon Jun 14 2021

Areas affected...Northern West Virginia...western Maryland and far
northwest Virginia.

Concerning...Severe Thunderstorm Watch 271...272...

Valid 142337Z - 150130Z

The severe weather threat for Severe Thunderstorm Watch 271, 272
continues.

SUMMARY...The severe threat continues across WW 271 as well as WW
272. Damaging winds will continue to be the primary hazard, but a
few instances of severe hail remain possible. Given coming watch
expirations in the next 1-2 hours, local extensions may be needed
before storms exit the watch areas.

DISCUSSION...Several damaging wind reports, as well as a few
instances of quarter-sized hail, have been noted with a broken line
of storms across northern WV over the past 1-2 hours. Although these
storms have primarily been discrete to semi-discrete, regional
reflectivity and velocity data suggests that at least one or two
cells are beginning to develop organized outflows and take on more
linear characteristics. This is the expected evolution given storm
motion and deep-layer shear orientation to the initiating cold
front, and may support an increasing damaging wind threat in the
coming hours (though isolated severe hail will remain possible). One
mitigating factor is reduced instability immediately ahead of these
storms as they move across the higher terrain of northeast WV where
temperatures and dewpoints are cooler compared to surrounding
locations. However, re-intensification is possible as storms
transverse the terrain and move into a more unstable air mass across
northwest VA (see MCD 973 for details).

..Moore.. 06/14/2021

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

ATTN...WFO...LWX...PBZ...RLX...

LAT...LON   39158144 39438056 39657966 39717896 39677797 39267789
            38877830 38577863 38497925 38658006 38908095 39018155
            39158144 

NNNN