Severe Storm Outlook Narrative (AC)
Issued by NWS
ACUS11 KWNS 272326
SPC MCD 272326
Mesoscale Discussion 0576
NWS Storm Prediction Center Norman OK
0626 PM CDT Thu Apr 27 2017
Areas affected...southeastern Alabama into central Georgia
Concerning...Tornado Watch 169...
Valid 272326Z - 280030Z
The severe weather threat for Tornado Watch 169 continues.
SUMMARY...Severe weather potential is expected to become
increasingly negligible through 8-11 pm EDT . A new severe weather
watch is not anticipated, and tornado watch 169 may be allowed to
expire as previously scheduled at 8 pm EDT.
DISCUSSION...Thunderstorm development persists from near Troy AL
through the Columbus GA area into areas south of Peach Tree City Ga.
This is occurring within a lingering corridor of moderate boundary
layer instability, east southeast of a stalling/weakening frontal
zone. Localized enhanced surface convergence and weak lower/mid
tropospheric warm advection may be contributing to forcing for this
activity, and vertical shear near a 30 kt southwesterly 850 mb jet
axis (beneath 40-50 kt westerly/cyclonic 500 mb flow) remains
strong. However, diurnal boundary layer cooling coupled with a
warming mid-level environment is expected to result in diminishing
convective trends across the region through 00-03Z.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 32168591 33188449 33648383 33488240 32468383 31528580
31398641 31838642 32168591