Severe Storm Outlook Narrative (AC)
Issued by NWS

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000
ACUS01 KWNS 260032
SWODY1
SPC AC 260030

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0730 PM CDT Thu May 25 2017

Valid 260100Z - 261200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
KS...

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE CENTRAL PLAINS...

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM NORTHERN DE
INTO CENTRAL NJ...

...SUMMARY...
Isolated severe thunderstorms will linger this evening across
portions of the central Plains, primarily KS.  Other strong storms
are possible through mid evening across portions of the Mid Atlantic
Coast region.

...Central Plains...

A long-lived cluster of convection has progressed across the high
Plains of northeast CO into northwest KS and an extensive cold pool
has developed in the wake of this activity which is aiding a
southward-surging wind shift across western KS/eastern CO.  Along
the leading edge of this precip shield/wind shift, several robust
thunderstorms are propagating southeast across the southeastern part
of WW267 over KS.  Large hail accompanies this activity over Gove
County and this convection should advance into central KS over the
next few hours aided in part by an expected increase in LLJ.  Given
the observed instability across the Plains it appears large
hail/gusty winds may be noted with these storms as they approach
parts of central KS.  For these reasons severe probs have been
increased a bit further downstream to account for this scenario over
the next few hours.

...Middle Atlantic...

A well-organized cluster of storms has evolved over the Delmarva
region early this evening within exit region of strong mid-level
jet.  An arcing band of robust convection is propagating northeast
at roughly 30kt and should approach the PHL metro area shortly after
01z.  By 02z this activity will advance north of the well-defined
frontal zone draped across central NJ into southeast PA.  Convection
should weaken as this activity becomes elevated.  Otherwise, gusty
winds appear to be the greatest severe risk with these storms.

..Darrow.. 05/26/2017

$$



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