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Mesoscale Discussion 0044
NWS Storm Prediction Center Norman OK
0348 PM CST Sat Jan 11 2020
Areas affected...Portions of northeastern GA and western NC/SC
Concerning...Severe potential...Watch possible
Valid 112148Z - 112345Z
Probability of Watch Issuance...40 percent
SUMMARY...At least an isolated severe threat may exist with storms
moving northeastward. Watch issuance is possible in the next 1-2
hours.
DISCUSSION...A long lived squall line has maintained its intensity
across northwestern GA this afternoon, with isolated to scattered
damaging wind reports received. As a powerful upper-level trough
with attendant 90-110+ kt mid-level southwesterly jet overspreads
the OH Valley and central Appalachians early this evening, low-level
moisture transport will continue northward across GA and into parts
of western NC/SC. Widespread cloud cover and poor mid-level lapse
rates will limit instability, with MLCAPE expected to remain less
than 500 J/kg. Regardless, strong low and mid-level shear may
support the continuation of at least some updraft organization as
storms move northeastward into parts of northern GA and western
NC/SC early this evening. Isolated damaging winds would likely be
the primary threat, but a tornado or two cannot be ruled out given
the degree of low-level shear. Although not immediately likely,
watch issuance is possible in the next 1-2 hours.
..Gleason/Hart.. 01/11/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GSP...FFC...
LAT...LON 34308360 35048344 35338365 35678325 35748264 35438214
34598222 34018266 33848300 34018342 34308360
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