|Mesoscale Discussion 379|
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Mesoscale Discussion 0379
NWS Storm Prediction Center Norman OK
0546 AM CDT Mon Apr 13 2020
Areas affected...Eastern North Carolina into southeastern Virginia
and portions of the southern Delmarva Peninsula
Concerning...Tornado Watch 118...
Valid 131046Z - 131215Z
The severe weather threat for Tornado Watch 118 continues.
SUMMARY...An evolving squall line is expected to overspread the
region through 9-11 AM EDT accompanied by the risk for tornadoes
and/or potentially very damaging wind gusts.
DISCUSSION...The squall line is gradually intensifyng along the
deepening pre-frontal surface trough axis, which is forecast to
continue shifting across the North Carolina/Virginia piedmont, into
the coastal plain through 13-15Z. The latest Rapid Refresh suggests
that further strengthening of the associated southerly 850 mb jet
core in excess of 70 kts is possible, and extreme low-level shear
may coincide with increasing boundary-layer destabilization
associated with continued low-level moisture advection and at least
some daytime heating. This environment probably will continue to
support intensifying mesoscale cyclonic circulations within the
squall line, accompanied by a risk for tornadoes and/or locally
potentially very damaging wind gusts.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 38167645 38107561 37167596 35857631 34107782 34277890
34877953 37347804 38167645
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