This is a multi-part message in MIME format...

------------=_1535155383-1928-5210
Content-Type: text/plain

ACUS11 KWNS 250002
SWOMCD
SPC MCD 250002
IAZ000-250200-

Mesoscale Discussion 1352
NWS Storm Prediction Center Norman OK
0702 PM CDT Fri Aug 24 2018

Areas affected...North-central Iowa

Concerning...Severe potential...Watch unlikely

Valid 250002Z - 250200Z

Probability of Watch Issuance...20 percent

SUMMARY...Isolated supercell may produce damaging wind gusts,
marginally severe hail, or perhaps a brief tornado before moving
into a more stable airmass and weakening. A WW issuance is not
anticipated.

DISCUSSION...A lone supercell thunderstorm, currently over Cerro
Gordo County, IA, is currently showing broad mid-level rotation. A
funnel cloud was also reported in Hancock County, IA within the past
45 minutes, with 1.25 inch hail reported more recently in Cerro
Gordo, County. Currently, this storm is moving east-southeast in an
airmass supporting updraft organization and marginally severe
wind/hail (MLCAPE on the order of 1500 J/kg). Kinematically
speaking, 40-50 knots of effective bulk shear are present across IA.
The storm may also be traversing a combined warm front/differential
heating boundary, ingesting enough low-level streamwise vorticity to
acquire updraft rotation. Storm mergers along the supercell's flank
may also foster stronger cold-pool evolution, potentially elevating
the threat for damaging, gusty winds with some upscale growth
possible. Still, this supercell, maintaining a mainly eastward
component of motion, is quickly moving into a more stable
environment and a weakening trend is expected within the next 1-2
hours. Until then, marginally severe wind/hail in addition to a
possible brief tornado remain possible.

Given the brevity and localized nature of the severe threat, the
issuance of a severe weather watch is not expected at this time.

..Squitieri/Edwards.. 08/25/2018

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...ARX...DMX...

LAT...LON 43469371 43499329 43359266 43149228 42969220 42679240
42589288 42729361 43059413 43469371



------------=_1535155383-1928-5210
Content-Type: text/plain; charset="US-ASCII"
Content-Disposition: inline
Content-Transfer-Encoding: 7BIT

= = =
To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. ------------=_1535155383-1928-5210--

--- SBBSecho 3.06-Linux
* Origin: Capitol City Online - capitolcityonline.net (1:2320/105)