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Mid to Long Term Discussion 2017


buckeyefan1

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We are heading into the season when we see the first mention of the Northwest Flow Snow.  From KGSP....

 The front will push across
northeast GA and the western Carolinas on Sunday warranting healthy
pops regionwide, eventually moving out overnight into Monday
morning.  At that point thermal profiles will be cooling rapidly
given the strength of post frontal caa therefore lingering moisture
across the high terrain could yield the first measurable nwfs event
just in time for our snowfall season to begin at the first of
November.  Temperatures through the medium range will initialize
warm at near normal levels, cooling a bit Saturday/Sunday given
increased coverage of clouds/precip, then falling to below normal
into Monday.
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It can snow in November, rare but happens every once in a blue moon. I Remeber this one.

 

November 18-19, 2000 Winter Storm 

Event Overview -

  • Description - An area of wet snow fell across northern Georgia - upstate South Carolina - into central North Carolina on Sunday November 19, 2000. 1-3 inches of snow was the general rule for much of this area. The accumulation of snow was limited by relatively warm soil temperatures. Some of the snowfall melted as it fell. A total of nearly 0.70 inches of precipitation fell at the RDU airport. About 0.50 of this amount was in the form of snow. Snow accumulated to around 1.5 inches at the airport. An accumulation of snow at RDU this early in the winter season is climatologically unusual.
 
Total snowfall accumulation 11/18/00 through 11/19/00
Amounts are in inches and "T" represents trace amounts. 

accum.20001119.gif


 

  • Pattern of Cyclogenesis - (Active Southerly Jet, west-east surface ridge, ill defined surface wave) 
    Surface analysis indicated a weak west to east high pressure ridge extended across the southern plains into Kentucky and a poorly defined surface wave was near the Gulf Coast. Little or no horizontal thermal advection is associated with such weak meteorological features. In the absence of horizontal thermal advection, diabatic processes determine the p-types. The stretching of the surface ridge from west to east is indicative of an active upper level southerly jet. In summary, the analysis of surface data provided the following clues: 

     
    • weak wave and ridge axis - lack of horizontal thermal advection so diabatic processes will determine the p-types.
    • west to east surface ridge axis - an active upper level southerly jet
    • measurable precipitation can occur farther north than you might think - i.e, near the centers of weak high cells along the ridge axis.
 
11/19/00 1200Z 300 mb wind and height (ETA analysis) 

h31912map.gif


 
11/19/00 1200Z 850 mb temperature and height (ETA analysis) 

h81912map.gif


 
11/19/00 1200Z Surface pressure and thickness (ETA analysis) 

hs1912map.gif
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5 hours ago, Cold Rain said:

Great track, banana high...what's not to love?!

gfs_mslp_pcpn_frzn_us_50.thumb.png.32658509a4f02c23e9369dd0f5cfbe52.png

Well at least it's better than last year.  We weren't watching fantasy storms, we were dodging wildfires, dealing with smokey air and warm temps.  At least if the Wolfpack beat the Tigers on November 4th I can console myself by tracking this storm LOL.

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Meanwhile, for the upcoming weekend.....

While it is still too 
early to get too caught up in details, this energetic system with 
the potential for strong kinematic forcing from possible PFJ-STJ 
juxtaposition across the Deep South, coupled with 40 to 60kt warm 
conveyor belt moistening on the cyclonic side of the trough could 
bring another round of widespread moderate heavy rainfall along with 
the possibility of some strong to severe storms to the area. At this 
time, the wettest/most unsettled time period looks to be from late 
Saturday afternoon through midday Sunday, however this timing could 
speed up/or slow down over the next couple of days.
Additionally, this pattern could also result in a classic "Carolina 
Split" with a precip minimum east of the mountains, so still quite a 
bit of uncertainty. 
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Maybe frost of the pumpkins for Halloween.

The main upper trof axis swings by Sunday night, briefly bottoming
out low level thicknesses down towards the 1310 meter range, which
is a `yellow` flag for potential freezing. Mins Monday morning will
be mostly in the mid 30s northwest to lower 40s in the east, with
highs under sunny skies Monday stalling in the mid and upper 50s.
Tuesday morning will be our coolest, with mostly mid 30s across the
area with potential for widespread frost.


 

 

aaaa.jpg

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5 hours ago, NCSNOW said:

Euro has to be throwing some great upslope into Northern mtns with a 970ish sitting on jersey Coast in a few days

LOOPS
MRF(GFS)       CMC       NAVY(NOGAPS)       ECMWF(to 168hrs)      
RETURN LINKS
E-WALL HOME

 

You can actually access the Euro snow, precip, and other maps for free here. It’ll be a great resource come winter! 

https://weather.us/model-charts/euro/799-w-396-n/acc-precipitation-snow-total/20171105-1200z.html

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2 hours ago, Solak said:

Need to get rid of this...

Big time warming ahead for us...we may see the 80s return!
Here is the new 8-14 day outlook just in.

No automatic alt text available.

This probably goes along with my superstitions (like Halloween storm, woolly worms, etc.), but I would prefer a warm start to November; with a flip to a cold patter at or just after Thanksgiving. It "seems" that when we go into December in a cold pattern that signals the up coming overall winter pattern.

So the map above looks great to me, especially with all the cold building to the north and with it being a progressive pattern.   

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I don't think 80s are going to happen, except maybe kissing 80. The models are showing ridging, but it's generally flattened by some northern stream systems, and doesn't look at all like the death ridge we saw in October, which is what we'd need for 80s here this time of year. Regardless, it'll be above normal for a while after this week.

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Indices are bad, bad, bad right now. But as I stated above I would rather see this right now then at the end of November.

PNA - Falling strongly negative and staying at least moderately negative in the LR

AO - Going strongly positive and averaging positive in the LR

NAO - Going moderately positive and averaging positive in the LR

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/teleconnections.shtml

 

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53 minutes ago, FallsLake said:

Indices are bad, bad, bad right now. But as I stated above I would rather see this right now then at the end of November.

PNA - Falling strongly negative and staying at least moderately negative in the LR

AO - Going strongly positive and averaging positive in the LR

NAO - Going moderately positive and averaging positive in the LR

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/teleconnections.shtml

 

Yeah the indices are all going the wrong direction. The next couple of weeks will be warm. 

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32 minutes ago, Cold Rain said:

Does this count in your big October storm category?

gfs_mslp_pcpn_frzn_us_2.thumb.png.9e1aed637d6a9b460d53b7487eb918cc.png

If I'm going totally with what "I" experience, then no. But if I tried to put any scientific explanation to the idea, then this would count. The end location of the storm above would affect the pattern similarly as past Halloween storms.    ....If I was trying to be scientific. :) 

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