SPC AC 290545

   Day 3 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1145 PM CST Sun Nov 28 2021

   Valid 011200Z - 021200Z

   ...NO THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   The risk for thunderstorms appears negligible across the U.S.
   Wednesday through Wednesday night.

   ...Discussion...
   Mid-level ridging may be suppressed somewhat across parts of the
   Pacific Northwest during this period, as one significant short wave
   perturbation progresses inland of the British Columbia coast through
   the Canadian Rockies, around its crest.  However, models indicate
   that a strong belt of mid/upper flow will remain broadly
   anticyclonic across the mid-latitude eastern Pacific through the
   northern U.S. Rockies and Great Plains.  The leading edge of this
   jet is forecast to continue digging into downstream troughing,
   across the Great Lakes, Ohio Valley and Mid Atlantic Coast, with one
   embedded perturbation accompanied by a modestly deep surface cyclone
   quickly migrating from the Canadian Prairies through the upper Great
   Lakes vicinity.  At the same time, though, potentially cool surface
   ridging appears likely to be maintained across much of the Gulf
   Coast and Gulf of Mexico vicinity, beneath broadly confluent
   mid/upper flow, which will continue to inhibit boundary-layer
   moistening over the northern Gulf and preclude a substantive inland
   moisture return.  Generally dry and/or otherwise stable conditions
   are expected to persist across much of the nation with little risk
   for thunderstorm activity.

   ..Kerr.. 11/29/2021

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   NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0830Z