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2nd Annual Snow Thread for the Mountains


Met1985

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nam and high res nam still want to bring a 35dbz band over wnc around 4am Saturday morning but the gfs and euro aren't buying it.  If you remember the high res nam was dropping 2" here for yesterday morning and that didn't happen so I really don't see much reason to buy what the nam is suggesting.  Even though I would love for it to happen.

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NAM/WRF is a head scratcher Saturday. Canadian RGEM is not buying it either. Looks like some sort of feedback on the NAM; outvoted 3 to 1. Most areas can forget it. However the ski areas in northwest NC, only the highest elevations, could get a picturesque dusting to set the tone for a lovely late season Saturday on the slopes.

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Get your popcorn guys, we are in the best spot in the SE temp wise and its the end of the season so there is no reason to not go all in!

As long as the moisture is there, I'm all in on temps. The snow storm that is about to slam the MW and NE this weekend will keep a good snow pack down which will do nothing but cool any air being ushered in from the North.

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Lotta ifs & buts to come!.....the end of the week system the models are showing has my interest! Here is GSP's overnight long term.

 

.LONG TERM /TUESDAY THROUGH FRIDAY/...
AS OF 230 AM EST SATURDAY...THE MEDIUM RANGE FCST PICKS UP AT 12Z ON
TUESDAY WITH A BROAD UPPER TROF LINGERING TO OUR NORTH AND WEAK
UPPER RIDGING OVER THE CENTRAL ROCKIES. OVER THE NEXT 24 TO 48
HRS...A SERIES OF UPPER SHORTWAVES RIPPLE OVER THE REGION FROM WEST
TO EAST AS ANOTHER SOUTHERN STREAM UPPER TROF DIGS DOWN OVER THE
SOUTHERN PLAINS AND INTO THE SOUTHERN MISS RIVER VALLEY. THE LONG
RANGE MODELS ARE COMING INTO BETTER AGREEMENT WRT THE EVOLUTION OF
THIS TROF AS IT APPROACHES THE FCST AREA. BOTH THE GFS AND ECMWF NOW
HAVE THE SYSTEM CUTTING OFF FROM THE NORTHERN STREAM FLOW AND
DEVELOPING AN H5 LOW BY EARLY FRI.
THEY KEEP THE SYSTEM OVER THE
FCST AREA THRU FRI AND FINALLY BEGIN TO MOVE IT OFFSHORE BY SAT
MORNING WHICH IS NOW DAY 7.


AT THE SFC...CANADIAN HIGH PRESSURE SPREADS OVER THE REGION ON
TUESDAY AND REMAINS IN PLACE THRU WEDNESDAY DEVELOPING A WEDGE TYPE
PATTERN IN THE PROCESS. THE LONG RANGE MODELS SPIN UP ANOTHER LOW
OVER THE NORTHERN GULF OF MEXICO ON THURS AND GRADUALLY TRACK IT NE
AND OVER TH FCST AREA. THERE HAS BEEN BETTER CONSISTENCY BETWEEN THE
MODELS OVER THE PAST FEW RUNS AND THEY APPEAR TO BE MORE IN SYNC WRT
THE EVOLUTION OF THE GULF LOW.
BASED ON CURRENT PROJECTIONS...BY SAT
MORNING THE LOW WILL LIKELY BE MOVING OFF THE CAROLINA COAST WITH
DRIER HIGH PRESSURE MOVING IN BEHIND IT. AS FOR THE SENSIBLE
FCST...NO MAJOR CHANGES WERE MADE TO THE POP TRENDS WITH THE HIGHEST
VALUES FROM THURS EVENING THRU FRI MORNING. FROZEN P-TYPES CONTINUE
TO BE THE MAIN CONCERN FOR THE PERIOD WITH PERIODS OF RAIN...FZ RAIN
AND SNOW POSSIBLE. WITH THE EVENT STILL SEVERAL DAYS OUT...THE
P-TYPE FCST IS CERTAINLY NOT SET IN STONE YET...BUT IT COULD PRODUCE
SOME SIGNIFICANT ICE ACCUMS ESPECIALLY OVER THE NC ZONES. THE TEMP
FCST IS ALSO TRICKY WITH THE LINGERING WEDGE PATTERN. TEMPS WILL
START OUT BELOW CLIMATOLOGY ON TUES AND LIKELY REMAIN BELOW NORMAL
THRU FRIDAY. BY THE WEEKEND...ITS LOOKING LIKE VALUES WILL CLIMB
BACK TO CLIMO OR JUST ABOVE.

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Euro ensemble members up to 5" so thats an improvement from the 00z.  Deterministic down to 1" but we will see these shifts this far out.  Personally I would much rather have the ensemble rising and deterministic falling over the latter.  23 members show a 6"+ snowfall.

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Euro ensemble members up to 5" so thats an improvement from the 00z.  Deterministic down to 1" but we will see these shifts this far out.  Personally I would much rather have the ensemble rising and deterministic falling over the latter.  23 members show a 6"+ snowfall.

Not bad. I don't have access to the euro, but from the other thread it sounded like everything was too warm for snow. Nice to see we still have something on the table.

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Not bad. I don't have access to the euro, but from the other thread it sounded like everything was too warm for snow. Nice to see we still have something on the table.

 

Yeah I think we have the best chance to cash in if anyone does.  If the 18z gfs was colder it would have been a mega dump.  Models are struggling with the cold but with this precip. on monday potentially coming farther south I think that only benefits us with getting our cold down here for the latter storm. 

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Yeah I think we have the best chance to cash in if anyone does.  If the 18z gfs was colder it would have been a mega dump.  Models are struggling with the cold but with this precip. on monday potentially coming farther south I think that only benefits us with getting our cold down here for the latter storm.

I agree. I like our positioning. The GEFS had a couple big dogs.

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GSP is seeing something for next thursday and friday the 6-7,  they have a hazardous weather outlook telling folks to stay tuned  on the weather for next thursday and friday for a possible significant winter weather event.  n ga. upstate sc and wnc.

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GSP's overnight LT disco:

 

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...
AS OF 310 AM EST ON SUNDAY...THE LATEST MODELS CONTINUE TO HIGHLIGHT
A CLASSIC MILLER A TYPE LOW AFFECTING OUR AREA SOMETIME BETWEEN
THURSDAY AND FRIDAY. HOWEVER...CONFIDENCE IS BELOW AVERAGE WITH
REGARD TO A TIMING OF THE LOW MOVING UP ALONG THE SE COAST AND P
TYPE ACROSS THE CWA AS MODELS REVEAL QUIET A BIT OF SPREAD.


THE CURRENT FORECAST PACKAGE WAS BASED ON THE MODEL BLEND...GIVING
MORE WEIGHT TO THE ECMWF DUE TO BETTER RUN TO RUN CONSISTENCY WITH
REGARD TO OVERALL SYNOPTIC PATTERN AND THERMAL PROFILE OVER THE PAST
SEVERAL CYCLES.


A SOUTHERN STREAM UPPER SHORTWAVE EJECTING OUT OF THE TX EARLY WED
WILL TRACK EASTWARD ALONG THE GULF COAST AND EVENTUALLY CLOSES OFF
AS IT REACHES IN THE VICINITY OF LA/MI BY 18Z THURSDAY. THE CANADIAN
IS AN OUTLIER KEEPING THE WAVE OPENED WHILE THE GFS/ECMWF MAINTAIN A
CLOSED UPPER LOW AS IT MOVE UP ALONG THE SE COAST THROUGH FRIDAY.
UPPER PATTERN BECOMES NEARLY ZONAL BY FRI NIGHT AND CONTINUE THAT
WAY THROUGH THE END OF PERIOD.

AT THE SURFACE...A COLD 1040+MB CANADIAN HIGH PRESSURE WILL BUILD
INTO THE NE STATES WEDNESDAY INTO THURSDAY SETTING UP A COLD AIR
DAMMING WEDGE ACROSS THE FORECAST AREA. MEANWHILE...A SURFACE LOW
WILL DEVELOP OVER THE WESTERN GULF AND TRACK EASTWARD ALONG THE GULF
COAST ON THURSDAY...REACHING THE SE COAST BY THU NIGHT/EARLY FRI.
THE GFS IS 12 HRS FASTER THAN THE ECMWF/CMC WITH THE ONSET OF PRECIP
OCCURRING AROUND 12Z THURSDAY. TAKING A COMPROMISE...POPS RAMP UP
FROM WEST TO EAST THRU THURSDAY AFTERNOON...WITH THE BEST CHANCE OF
PRECIP THU NIGHT INTO EARLY FRI AS THE LOW PASSES ALONG THE SE
COAST. P TYPE FORECAST CONTINUES TO BE VERY CHALLENGING AS THE NEW
GFS TRENDED WARMER WHILE THE ECMWF TRENDED COLDER. BECAUSE THE GFS
HAS RUN TO RUN CONSISTENCY PROBLEM...HAVE GONE WITH THE ECMWF
THERMAL PROFILE TO GENERATE THE P TYPE. USING THE MONOGRAM P TYPE
BASED ON THE ECMWF PARTIAL THICKNESS VALUES...WINTRY MIX OF
SNOW..SLEET AND FZ WERE MENTIONED ALONG AND NORTH OF I-85 MAINLY
THURSDAY NIGHT INTO EARLY FRI MORNING. AGAIN...CONFIDENCE IS LOW DUE
TO THE HIGH UNCERTAINTY.
CONDITIONS TAPER OFF FRI AFTERNOON AS THE
LOW PULLS FURTHER NE AWAY FROM THE REGION AND DRY HIGH PRESSURE
BUILDS BEHIND IT. TEMPERATURES WILL BE AROUND 3-5 DEGREES BELOW
NORMAL ON WED...10-15 DEGREES BELOW THU WITH QUICK WARMING TREND
EXPECTED BY FRI NIGHT

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Yeah Don I agree with GSP about weighing more on the euro solution right now because of its consistency.  Its hard to bet against it when it shows the same storm over and over again with only a few hiccups.  It will be interesting to see if the 12z follows suit.  I think  all models will cave to the euro if we get 2 or 3 more euro runs with the damming feature dominating.

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