SPC AC 150730

   Day 3 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0230 AM CDT Sat Jul 15 2017

   Valid 171200Z - 181200Z

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE UPPER
   MIDWEST AND NORTH-CENTRAL HIGH PLAINS...

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE
   NORTHEAST/MID-ATLANTIC STATES...

   ...SUMMARY...
   Strong to severe thunderstorms will be possible Monday across parts
   of the Northeast and mid-Atlantic states, as well as the Upper
   Midwest and north-central High Plains.

   ...Upper Midwest/North-Central High Plains...
   An eastward-progressive upper-level trough will continue to cross
   the Canadian prairies on Monday, with at least weak height falls and
   some mid-level cooling grazing the far northern tier of the CONUS
   from ND to northern MN and the Lake Superior vicinity. There should
   be at least some potential for severe thunderstorms across the
   region Monday, perhaps especially along an east-southeastward moving
   front where moderate destabilization may occur (especially across
   parts of MN). Other strong to severe thunderstorms could occur
   Monday afternoon and evening with a more modestly moist/unstable
   terrain-aided regime across southern MT/parts of WY into the
   north-central High Plains. Portions of the Upper Midwest,
   particularly northern and central MN, will be reevaluated in
   subsequent outlooks for a possible categorical Slight Risk upgrade.

   ...Northeast/mid-Atlantic States...
   An upper low (and its related mid-level cool pocket) will likely
   continue eastward over the Northeast states on Monday. While
   early-day cloud cover and precipitation could exist across parts of
   the region, at least weak to moderate destabilization should occur
   into downstream areas along and especially east of the Appalachians
   vicinity. At least some strong to severe thunderstorms would appear
   to be a possibility mainly Monday afternoon into early evening, with
   damaging winds as the most common severe risk.

   ..Guyer.. 07/15/2017

   CLICK TO GET WUUS03 PTSDY3 PRODUCT

   NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z