Severe Storm Outlook Narrative (AC)
Issued by NWS

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000
ACUS01 KWNS 210101
SWODY1
SPC AC 210100

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0800 PM CDT Wed Sep 20 2017

Valid 210100Z - 211200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM PORTIONS OF
WISCONSIN SOUTHWEST TO NORTHEAST MISSOURI...

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE CENTRAL AND NORTH TEXAS VICINITY...

...SUMMARY...
A few strong to severe storms with locally damaging wind risk may
continue for a few more hours from parts of Wisconsin to northeast
Missouri, as well as across portions of central and northern Texas.

...Wisconsin to northeast Missouri...
Strong storms continue early this evening near and ahead of a
surface cold front -- from roughly central Wisconsin southwest to
the Iowa/Illinois border area.  While deep-layer shear remains
sufficient for a few organized storms, convection is expected to
gradually weaken this evening as diurnal stabilization acts in
concert with gradually weakening flow as the upper system departs
north-northeastward across the western Ontario vicinity.

...Parts of central and northern Texas...
A few vigorous storms persist -- mainly within a corridor from
roughly San Angelo northeast into portions of the northern Texas
vicinity.  The overall trend has been for convection to gradually
diminish, and expect severe threat to likewise wane over the next
few hours, given a stabilizing boundary layer and relatively weak
flow through the lower and middle troposphere as indicated by
evening ROABs and local VWPs.

..Goss.. 09/21/2017

$$



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