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Upstate NY/North Country + adjacent ON, QC, VT: Meteorological fall is here


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Way out in la la land, but i would love to see that 11-15 temp anomaly map on the 12Z GFS verify. Been waiting for a long time to get a sharp arctic trof to anchor north of Lake Superior...which would presumably give us a chance for a significant SW flow lake effect event in WNY as shortwaves pinwheel around the trof.

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Man, if we could pop into a + PNA pattern things could get fun. Temps in NW Canada/Alaska have been frigid. Fairbanks came in at an impressive 11 deg. below avg for November. Check out this forecast for Eagle, AK (eastern part of the state):

TODAY...MOSTLY CLEAR. HIGHS 30 TO 45 BELOW. LIGHT WINDS.

.TONIGHT...MOSTLY CLEAR. LOWS 40 TO 50 BELOW. LIGHT WINDS.

.SUNDAY...PARTLY CLOUDY. HIGHS 30 TO 45 BELOW. LIGHT WINDS.

.SUNDAY NIGHT...MOSTLY CLOUDY. LOWS 35 TO 45 BELOW. LIGHT WINDS.

.MONDAY...MOSTLY CLOUDY. HIGHS 20 TO 35 BELOW. LIGHT WINDS.

.MONDAY NIGHT...MOSTLY CLOUDY. LOWS AROUND 45 BELOW.

.TUESDAY...MOSTLY CLOUDY. HIGHS AROUND 30 BELOW.

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Man, if we could pop into a + PNA pattern things could get fun. Temps in NW Canada/Alaska have been frigid. Fairbanks came in at an impressive 11 deg. below avg for November. Check out this forecast for Eagle, AK (eastern part of the state):

TODAY...MOSTLY CLEAR. HIGHS 30 TO 45 BELOW. LIGHT WINDS.

.TONIGHT...MOSTLY CLEAR. LOWS 40 TO 50 BELOW. LIGHT WINDS.

.SUNDAY...PARTLY CLOUDY. HIGHS 30 TO 45 BELOW. LIGHT WINDS.

.SUNDAY NIGHT...MOSTLY CLOUDY. LOWS 35 TO 45 BELOW. LIGHT WINDS.

.MONDAY...MOSTLY CLOUDY. HIGHS 20 TO 35 BELOW. LIGHT WINDS.

.MONDAY NIGHT...MOSTLY CLOUDY. LOWS AROUND 45 BELOW.

.TUESDAY...MOSTLY CLOUDY. HIGHS AROUND 30 BELOW.

seems like things will change for the better in the next 10 days-2 weeks.
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Man, if we could pop into a + PNA pattern things could get fun. Temps in NW Canada/Alaska have been frigid. Fairbanks came in at an impressive 11 deg. below avg for November. Check out this forecast for Eagle, AK (eastern part of the state):

TODAY...MOSTLY CLEAR. HIGHS 30 TO 45 BELOW. LIGHT WINDS.

.TONIGHT...MOSTLY CLEAR. LOWS 40 TO 50 BELOW. LIGHT WINDS.

.SUNDAY...PARTLY CLOUDY. HIGHS 30 TO 45 BELOW. LIGHT WINDS.

.SUNDAY NIGHT...MOSTLY CLOUDY. LOWS 35 TO 45 BELOW. LIGHT WINDS.

.MONDAY...MOSTLY CLOUDY. HIGHS 20 TO 35 BELOW. LIGHT WINDS.

.MONDAY NIGHT...MOSTLY CLOUDY. LOWS AROUND 45 BELOW.

.TUESDAY...MOSTLY CLOUDY. HIGHS AROUND 30 BELOW.

Most of the GFS ensemble members have the PNA going positive around the 10th of December, with all members showing the NAO going negative at that time.

Also, the EC, GFS and the UKMET all show some signs of the MJO going into phase 1-2 around the day 10 period which would favor colder temperatures for the eastern US. The MJO signal forecast by the models is out of the low amplitude "circle of death" but it is still somewhat weak, so it may have a limited influence.

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Great discussion from NWS this afternoon.

THERE IS A SUGGESTION BY MEDIUM RANGE MODELS THAT SIGNIFICANT

RIDGING MAY SET UP OVER THE NORTH ATLANTIC DURING THE SECOND FULL

WEEK OF THIS MONTH. THE ECMWF AND A MAJORITY OF THE GEFS ENSEMBLES

SUPPORT THIS SCENARIO...WHICH WOULD MEAN AN AMPLIFIED TROUGH-RIDGE

PATTERN OVER EASTERN NORTH AMERICA AND THE NORTH ATLANTIC. THIS

WOULD LEAVE THE DOOR OPEN FOR SEASONABLY COLD AIR TO WORK SOUTH FROM

NORTH CENTRAL CANADA...WHERE COLD AIR SHOULD BE INTENSIFYING THE

NEXT 10 DAYS.

THE SOLUTION BEING PORTRAYED BY THE AFOREMENTIONED GUIDANCE PACKAGES

WOULD FAVOR A BROAD BASED TROUGH SETTING UP OVER THE MISSISSIPPI AND

LOWER OHIO VALLEYS...WITH THE COLDER AIR TAKING MORE A MORE

CIRCUITOUS ROUTE ACROSS THE MID WEST BEFORE MAKING ITS WAY TO OUR

FORECAST AREA. THIS ROUTE WOULD FAVOR SIGNIFICANT LAKE SNOWS EAST

AND NORTHEAST OF LAKES ERIE AND ONTARIO...INCLUDING THE BUFFALO

AREA. THE AIRMASS WOULD NOT BE ANOMALOUSLY COLD...BUT ALL THAT WOULD

BE NEEDED IS FOR H85 TEMPS TO BE IN THE VCNTY OF -8C OR LOWER.

IN TERMS OF THE REAL COLD AIR...THERE HAVE BEEN TWO MAIN CORES OF

ARCTIC AIR THE PAST TWO WEEKS WITH ONE OVER SIBERIA AND THE OTHER

OVER THE CANADIAN ARCTIC. UNUSUALLY STRONG RIDGING OVER SIBERIA THIS

WEEK WILL DISPERSE/DISPLACE THE AIRMASS ON THE OTHER SIDE OF THE

POLE...WHILE THE ARCTIC AIR ON THIS SIDE OF THE POLE IS EXPECTED TO

INTENSIFY SOMEWHAT. WHILE THIS COLD AIR WILL NOT MAKE IT DOWN TO THE

LOWER 48 ANYTIME SOON...IT IS WORTH NOTING.

ALSO WORTH MENTIONING IS THAT THE PERSISTENT MID LEVEL JET THAT

CROSSED NORTH AMERICA AND NEARLY ENCIRCLED THE GLOBE (AT ROUGHLY

40-50N) AT THIS TIME LAST YEAR IS IN A MUCH WEAKER STATE THIS FALL.

THE MERIDIONAL FLOW AT H7 IS MORE ANOMALOUS IN NATURE...WHICH

SUGGESTS MUCH MORE CONDUCIVE CONDITIONS FOR BLOCKING AND A HIGHER

CHANCE FOR COLD AIR INTRUSIONS. PART OF THIS IS DUE TO THE FACT THAT

THE ICELANDIC LOW HAS BEEN WEAKER THIS FALL AND HAS ACTUALLY GIVEN

WAY TO RIDGING SEVERAL TIMES.

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