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

------------=_1527896000-1857-8444
Content-Type: text/plain

ACUS11 KWNS 012333
SWOMCD
SPC MCD 012332
SDZ000-NEZ000-020100-

Mesoscale Discussion 0616
NWS Storm Prediction Center Norman OK
0632 PM CDT Fri Jun 01 2018

Areas affected...Portions of SD

Concerning...Severe Thunderstorm Watch 145...

Valid 012332Z - 020100Z

The severe weather threat for Severe Thunderstorm Watch 145
continues.

SUMMARY...Mainly an isolated large hail and damaging wind threat
continues across WW 145. A tornado or two also remains possible,
mainly across far north-central SD.

DISCUSSION...Isolated to widely scattered thunderstorms formed this
afternoon across parts of central SD along a surface trough. A
narrow axis of richer low-level moisture characterized by low 60s
dewpoints is oriented from northwest to southeast across this
region. A corresponding maximum of instability is also present in
the same general area, with 23Z RAP mesoanalysis estimating MLCAPE
up to 1500-2000 J/kg. Two supercells over far north-central SD have
produced large hail up to the size of golf balls over the past hour,
with more widely scattered convection also present over far
south-central SD.

As a cold front over western SD merges with the surface trough this
evening, an increase in convective coverage appears likely across
central SD and WW 145. Large hail and damaging winds will continue
to be main threats given the favorable thermodynamic and kinematic
environment. Eventual consolidation into a line would suggest a
greater wind threat this evening with eastward extent. A extension
in area of WW 145 into more of southeastern SD may be needed given
current radar trends, but the environment does become less unstable
due to a drier low-level airmass across this region. Finally, a
small part of far north-central SD appears to have slightly stronger
low-level flow, and a tornado cannot be ruled out across that area
in the short term.

..Gleason.. 06/01/2018

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

ATTN...WFO...FSD...ABR...LBF...UNR...

LAT...LON 45890192 45909869 42969773 42989949 43599951 43890007
44020192 45890192



------------=_1527896000-1857-8444
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. ------------=_1527896000-1857-8444--

--- SBBSecho 3.04-Linux
* Origin: Capitol City Online - capitolcityonline.net (1:2320/105)