Severe Storm Outlook Narrative (AC)
Issued by NWS
ACUS11 KWNS 270458
SPC MCD 270457
Mesoscale Discussion 0569
NWS Storm Prediction Center Norman OK
1157 PM CDT Wed Apr 26 2017
Areas affected...parts of southeastern Mississippi
Concerning...Severe Thunderstorm Watch 167...
Valid 270457Z - 270630Z
The severe weather threat for Severe Thunderstorm Watch 167
SUMMARY...Potential the development of an isolated supercell or two
may linger into the 06-09Z time frame, accompanied by at least the
risk for severe hail.
DISCUSSION...Some recent increase in thunderstorm development is
ongoing along the pre-frontal wind shift, north/northeast of Mccomb
into areas east of the Jackson area. This appears to be occurring
on the southernmost periphery of the upper trough axis pivoting in
negatively tilted fashion through the lower Mississippi Valley.
Mid-level forcing for ascent appears likely to begin shifting
northeast of the region shortly, but lower/mid tropospheric warm
advection could maintain discrete storms into the 06-09Z time frame,
before mid-level inhibition begins to increase. In the presence of
moderately large CAPE, based within or just above the boundary
layer, a supercell or two is possible.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 31398994 31818933 32068903 32198877 31758863 31218944