Mesoscale Discussion 0769
NWS Storm Prediction Center Norman OK
0533 PM CDT Sat May 30 2020
Areas affected...southeast Virginia...northeast North Carolina
Concerning...Severe potential...Watch unlikely
Valid 302233Z - 310000Z
Probability of Watch Issuance...5 percent
SUMMARY...Isolated strong to severe storms are likely across
southeast Virginia into northeast North Carolina this evening.
Marginally severe wind is the primary threat, but a watch issuance
is unlikely.
DISCUSSION...Thunderstorms have developed along the Atlantic Coast
from southeast Virginia down through Georgia as areas have reached
their convective temperatures and along/ahead of a surface cold
front. Surface temperatures into the 80s F and low 90s F with
dewpoints in the mid 60s F to low 70s F have resulted in MLCAPE of
1000-2000 J/kg. Shear is relatively weak across much of this area,
although, mid-level winds have strengthened across the Mid-Atlantic
in response to an upper-level trough over the Great Lakes. This may
allow for stronger updrafts and some storm organization across
southeast Virginia and northeast North Carolina, although,
multicellular, outflow dominant convection is likely. Additionally,
enhanced surface convergence near a surface low in this area will be
a focus for convective initiation. Marginally severe winds are the
primary threat, especially with steeper low-level lapse rates.
Given, the isolated, marginal severe threat, a watch is unlikely.
..Nauslar/Thompson.. 05/30/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...AKQ...MHX...RAH...
LAT...LON 35487672 35697753 36667783 37257755 37257667 36847584
36337556 35777557 35407573 35487672
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