SPC Sep 4, 2022 Day 4-8 Severe Weather Outlook
SPC Sep 4, 2022 Day 4-8 Severe Weather Outlook
[html]Day 4-8 Outlook
Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0300 AM CDT Sun Sep 04 2022
Valid 071200Z - 121200Z
...DISCUSSION...
The medium-range model output remains characterized by large spread
concerning short wave developments within the westerlies across the
northern mid-latitude Pacific through the co*ing work week and next
weekend. This has and continues to result in rather varied
solutions concerning the eastward acceleration and evolution of one
short wave trough forecast to be approaching the British
Columbia/Pacific Northwest coast by mid week. It appears probable
that this impulse will contribute to at least some suppression of
the prominent mid-level high initially centered over the Great
Basin. It may provide support for a developing surface cyclone
across and east-northeast of the Canadian Prairies late this week
into next weekend. However, guidance continues to indicate that
this will be preceded by the evolution of a fairly broad, but weak
cyclonic mid-level circulation across the lower Mississippi
Valley/northwestern Gulf coast vicinity. This will likely inhibit
or at least slow substantive low-level moisture return to the higher
latitudes. The impact of this on subsequent destabilization is one
factor of perhaps a few that suggest the potential for organized
severe storm development will remain low.
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Source: SPC Sep 4, 2022 Day 4-8 Severe Weather Outlook (http://ht**://www.spc.noaa.gov/products/exper/day4-8/)