Severe Storm Outlook Narrative (AC)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
ACUS11 KWNS 240040
SPC MCD 240039

Mesoscale Discussion 0287
NWS Storm Prediction Center Norman OK
0739 PM CDT Mon Apr 23 2018

Areas affected...north-central and east-central GA

Concerning...Severe potential...Watch unlikely

Valid 240039Z - 240145Z

Probability of Watch Issuance...5 percent

SUMMARY...A couple of transient supercells are possible for the next
1-2 hours.

DISCUSSION...Radar data over the past couple of hours has shown a
couple of storms intermittently showing weak rotation (i.e., weak
supercells).  A sharp gradient in buoyancy is evident per the 00Z
Atlanta and Charleston, SC RAOBs with around 1500 J/kg MLCAPE to 100
J/kg, respectively along the warm frontal zone.  Conversely, much
stronger low-level shear was evident at Charleston but considerably
weaker at KCLX VAD and the Atlanta RAOB.  The overlapping area in
between Charleston and Atlanta is also where the storms have been
most prone to exhibit weak cyclonic rotation (also with sidelobe
contaminated velocities).  The expectation for the next few hours is
the possibility for an isolated gust may continue but diminishing
boundary-layer instability will likely lead to a lowering
strong/severe risk.

..Smith/Thompson.. 04/24/2018

...Please see for graphic product...


LAT...LON   32088224 32998369 33198407 33638401 33578317 33188239
            32718169 32088224 is the U.S. government's official web portal to all federal, state and local government web resources and services.