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National Weather Service Forecast Discussion For Weekend
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Tiger Boards - Clemson Football
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National Weather Service Forecast Discussion For Weekend


Sep 26, 2022, 8:59 AM

For those interested, or weather geeks like Rev and me, here's the AFD from NWS at GSP this morning for this weekend. Translation, the system has slowed a tad (not good for Saturday). Very windy and raw Friday with temps around 60 throughout the day and heavy rain. Saturday will be in the mid 60's with stiff wind and heavy rain. Timing still to be fine tuned. Hoping for a faster and more easterly track.

As of 230 AM Monday: Our medium range forecast will completely
depend on the fate of Ian, as the consensus forecast still brings
Ian (or it`s remnants) right up into our forecast area. The models
agree that Ian will miss the deep trough as it exits off the East
Coast. This will allow Ian to drift north across the eastern
Gulf. The EC and ECENS continue to be on the east side of the
forecast envelope, while the GFS and the GEFS are on the western
side. But they do seem to be in better agreement than the last
couple days. The onset of deep tropical moisture streaming in on
the north side of the circulation has been delayed a tad, with PoPs
ramping up Thursday night into Friday. In fact, the 00z GFS is even
slower, with mentionable PoPs starting after 12z Friday. Whenever
the precip starts, a 1030+ mb high will be over Upstate NY, so
hybrid CAD should set up quickly. This will strengthen a wedge
front near the SC coast, as Ian near landfall somewhere along the
northern FL Gulf coast. This set up could focus the heaviest rain
to our SE, with cool, wedgy air mass atop the forecast area. Highs
will be about 5-8 deg below normal Thursday, and 10-15 deg below
normal Friday. Breezy NE winds expected both days.

The latest forecast has Ian slowly drifting north across GA
Saturday, weakening to a tropical storm and transitioning into
an extratropical cyclone. Heavy rain looks like the main threat
as Ian approaches, with widespread 2-4" of QPF possible Thursday
night thru Saturday. It will be breezy due to the tightening
pres grad between Ian and the high to the north, but confidence
is low on tropical-storm-force winds making it all the way into
the forecast area. But with the heavy rain and gusty winds, still
may see some trees and power lines come down. Also, any tropical
tornado threat looks to remain to our SE near the wedge front. The
00z ECMWF has Ian take a sharper NWWD jog across GA, and suggests
a tropical/warm sector air mass might get into the lower Piedmont
Saturday aftn. But that is an outlier solution.

PoPs linger into Sunday, as the remnants of Ian wobbles across
the region. Temps rebound from the chilly Friday highs, but still
below normal thru Sunday.

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ur not alone...we will get weather updates every 10/15 mins

[1]
Sep 26, 2022, 9:02 AM

on Tnet from now till 7:30 Saturday.

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Re: National Weather Service Forecast Discussion For Weekend


Sep 26, 2022, 9:04 AM

That is great, the Upstate needs rain. You will be busy if you send out info every time the forecast changes.

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