Mesoscale Discussion 1211
NWS Storm Prediction Center Norman OK
0115 PM CDT Fri Jul 09 2021
Areas affected...eastern Virginia into eastern Maryland and Delaware
Concerning...Severe potential...Watch possible
Valid 091815Z - 092015Z
Probability of Watch Issuance...40 percent
SUMMARY...Scattered storms are expected to form over the next few
hours with locally damaging wind gusts and small hail possible.
DISCUSSION...Surface convergence continues to increase in relation
to a developing low pressure trough, with westerly winds across
western VA and NC. GPS PWAT sensors indicate a relative maximum
around 1.80" over eastern VA, with continued heating further
destabilizing the air mass. Shear is weak, but the favorable time of
day and steepening low-level lapse rates should foster strong
outflow, with a few severe gusts possible. The increasing westerly
flow should push the better moisture eastward with time,
..Jewell/Bunting.. 07/09/2021