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Mid to Long Range Discussion ~ 2023


buckeyefan1
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  • 2 weeks later...

Looks like we could get a coastal low on Sunday.  Not a moment too soon.

.LONG TERM /SATURDAY NIGHT THROUGH MONDAY/...
As of 110 PM EDT Tuesday: Rainfall will continue on Saturday as the
surface front makes its way across the region...likely exiting to
the southeast by late Friday night or early Saturday morning.
Thereafter, deterministic guidance continues to depict it stalling,
whereupon a robust upper shortwave will arrive and instigate
cyclogenesis along the Carolina coast.  This`ll give us another shot
at some rainfall...with the new QPF forecast giving the SC zones
another 0.25" or more on Sunday and Sunday night (more than half an
inch per the 12z GFS, which ironically has trended toward stronger
cyclogenesis than the ECMWF after barely developing the feature at
all on the 06z cycle).  All things considered, while this rain won`t
quiet offset the ongoing drought, it`ll bring some much-needed
moisture to the region.

image.png.718d4b57ba484facb44bd513bb7b70c9.png

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2 hours ago, NorthHillsWx said:

When is this above average El Niño rainfall supposed to start? It is bone dry. We have received a total of 0.18” the last 4 weeks from one rainfall 

Here is a comparison of temp/precip departures depending on enso state. It seems that El Nino skus more wet in the winter months vs in the fall months. Although El Nino years have reasonable odds of being dry as well

network_NCCLIMATE__station_NC3630__month_12__months_2__lag_-3__h_none__year_2023__cmap_RdYlGn___r_t__dpi_100.png

network_NCCLIMATE__station_NC3630__month_9__months_2__lag_-3__h_none__year_2023__cmap_RdYlGn___r_t__dpi_100.png

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4 hours ago, olafminesaw said:

Here is a comparison of temp/precip departures depending on enso state. It seems that El Nino skus more wet in the winter months vs in the fall months. Although El Nino years have reasonable odds of being dry as well

network_NCCLIMATE__station_NC3630__month_12__months_2__lag_-3__h_none__year_2023__cmap_RdYlGn___r_t__dpi_100.png

network_NCCLIMATE__station_NC3630__month_9__months_2__lag_-3__h_none__year_2023__cmap_RdYlGn___r_t__dpi_100.png

Indeed, the Sep-Oct period is often dry in/in advance of moderate+ Ninos with E coast wetness not starting til Nov or Dec:

 

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No meaningful rain on the GFS in the next 10 days. The Euro brings through a frontal system next Wednesday that drops .5-1". Unfortunately we've seen how these fronts have dried out as they've approached. Hopefully we get a pattern change around or just after Thanksgiving. I am glad we are stuck in this pattern now and not in mid January!

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From KGSP.  Will be a mess for early travelers, but we need the rain!  This should kick off an active couple of weeks.

 

 This high will remain
transitory into Mon and ridge down the east into the FA maintaining
near normal temperatures. Meanwhile, northern stream Pac energy
combines with the srn STJ over the West in a split flow regime,
which then creates a well defined and deep mlvl trof across the MS
Valley by Mon night. This trof will be highly dynamic as deep
layered shear nears 100 kts and combines with good GOM moisture flux
and creates a good set-up for sigfnt rainfall and possibly a few
organized thunderstorms across the srn half of the area. There`s
remains uncertainty with the amt of destabilization ahead of the
llvl forcing, but the model trends are going up with the ECMWF and
CMC models indicating arnd 200 J/kg of sbCAPE within the warm sector
during max heating. So a high shear / low CAPE strong storm
environment is looking more possible. Soundings also show very high
levels of 0-3 km helicity (>600 m2/s2), however, this is mostly due
to the aforementioned sfc wedge producing ne/ly at the sfc. But as
usual, the wedge bndry areas will suspect for more organized cell
development. In any case, this system looks to be a good precip
producer, the best in the last few months, with possibly 1.5 to 2.0
inches of rain over many areas thru Tue night. With high cloud cover
and ne/ly flow, highs Mon thru Wed will be held abt 5 degrees below
normal with lows averaging arnd normal.
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