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The return of winter pattern disco


Damage In Tolland

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Who was it that said the 12z GONAPS model looked ho-hum?

I disagree entirely. In working with these models, you have to understand their native biases and accommodate when possible. Atoning for the GONAPS huge longitudinal, weak-amplitude bias and the run is a massive massive suggestion before even getting there. The 500mb center is some 5 contours closed off on NJ Coast, which is:

a) substantially farther SW than prior runs

B) an amazing achievement for model that so rarely sees amplitude beyond 48 hours in some cases.

The only reason I am putting any stock in the go-take-a-nappy-wappy model is because Harv and I used use it for the following, and its a method that scores more than doesn't: When the NOGAPS leads the way on amplitude, more than 50% of the time you go your self a whopper.

Wow, thanks for that Tip. What did it ever show for the Blizzard of 2005 if you can recall? Learning something new everyday.

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Thanks Blizz,friar. Liking this. MPM itS a good thing you didn't express any optimism or the shock would cause me to fall to my death. We'll all see a good dose of snow,even Logan out west. Nice and cold here with snsh.

Lol. well the fortunes of MPM will likely turn soon enough

it is funny that at the same time we had a huge model bust at the short-medium terms (KU last weekend) the models were sniffing out that blocking would redevelop and the above normal departures (early jan-early -mid feb) that some had forecast (some regional mets and astute posters) was turning to crap. Just an awesome turn of events and i am very pumped that january is shaping up to have below normal departures for the month in SNE as well as a nice shot at true arctic air around or just after mid -month.

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EXTENDED FORECAST DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

229 PM EST MON JAN 03 2011

VALID 12Z THU JAN 06 2011 - 12Z MON JAN 10 2011

...FINAL MEDIUM RANGE DISCUSSION...

THE LARGE SCALE PATTERN STILL SHOWS EXTENSIVE HIGH LATITUDE

BLOCKING DOMINATING NOAM WEATHER OVER THE NEXT WEEK. THERE WILL BE

ONLY A GRADUAL WEAKENING OF THIS BLOCK AS IT SLOWLY RETROGRADES

FROM SRN GREENLAND BACK INTO NERN CANADA DURING THE MEDIUM RANGE

PERIOD. TO THE S OF THE BLOCK...BELOW NORMAL HEIGHTS AND CHILLY

TEMPS ARE DUE OVER THE ERN HALF OF THE NATION...AND A SECONDARY

NEGATIVE DEVELOPS OVER THE WRN STATES BY DAY 7.

THE MAIN ALTERATION TO THE UPDATED PRELIM PROGS WAS TO ADJUST A

POSSIBLE MAJOR STORM SWWD ALONG THE NRN MID ATLANTIC COAST IN THE

DAY 4-6 FRI-SUN TIME FRAME. 12Z/03 MODEL CONSENSUS LACKS GOOD

AGREEMENT IN ITS DEVELOPMENT...THOUGH THE 12Z GFS/UKMET ARE STILL

QUITE INTENSE WITH THE DEPTH OF THE SYS. THE MANUAL FINAL SURFACE

PROGS BACKED OFF A BIT FROM THE DEPTH THEY SHOWED IN THE UPDATED

PRELIM. WE WERE INFLUENCED IN THIS REGARD BY THE ECMWF PLAYING UP

A COMPLETELY DIFFERENT IMPULSE MOVING THRU THE BROAD CYCLONIC

VORTEX CENTERED OVER NRN PA/SRN NY STATE NEXT WEEKEND.

MORE ON 12Z MODELS: THE LATEST GFS/UKMET/CANADIAN MODELS REMAIN

CLUSTERED TO THE N OF LATITUDE 40 DEGREES WITH CLOSED CYCLONIC

ENERGY DROPPING SE FROM S CENTRAL CANADA THEN TURNING EWD ACROSS

THE ERN GREAT LAKES LAKES TOWARDS MA/RI/CAPE COD. SUCH A TRACK

WOULD BE A BIT TO THE LEFT OF THE FEB 6 1978 TRACK DESCRIBED

EARLIER. THE NEW GFS HAS TRENDED S OF ITS 00Z RUN SAT-SUN WITH ITS

MAIN UPPER ENERGY CROSSING SRN NY/SRN NEW ENG...KEEPING THE ENERGY

ABOVE LATITUDE 40. THE NEW CANADIAN IS ON THE N SIDE OF THE

ENVELOPE OF MODEL SOLUTIONS...AND THE NEW UKMET JUST A TAD TO THE

LEFT OF THE GFS SAT-SUN. THE ECMWF KEEPS IT MAIN ENERGY ALONG

LATITUDE 40 N OF ITS PRIOR 00Z RUN. STILL LOOKING AT A POTENTIAL

SNOWSTORM FOR SRN NEW ENG THIS COMING WEEKEND...BUT LESS RISK OF

IT EXTENDING S INTO THE MID ATLANTIC STATES THAN EARLIER THOUGHT.

TWO POTENTIAL PROBLEM AREAS ARE AN UPPER LOW BEING KICKED EWD

ACROSS THE US/MEXICAN BORDER DAYS 4-5...AND UPSTREAM ENERGY

DROPPING FROM THE NE PACIFIC SE INTO THE WRN STATES. THRU EARLY

DAY 6 THERE IS REASONABLE AGREEMENT ON THE TRACK OF THE FIRST SYS

MOVING ACROSS THE US MEXICAN BORDER...WITH FILLS RAPIDLY BEYOND

DAY 6. THE UPSTREAM SYS BEGINS TO HAVE SERIOUS TIMING DIFFERENCES

AS EARLY AS DAY 5...WITH THE DIFFERENCES INCREASING INTO DAYS 6

AND 7 AS COMPLEX SMALLER SCALE SHORTWAVES MOVE THRU THE DEEPENING

LARGER SCALE WRN TROF. TO MAKE A LONG STORY SHORT HERE...PREFER

THE DEEPER MODEL SOLUTIONS INC THIS NEW WRN TROF WHICH ARE ROUGHLY

IN LINE WITH A NUMBER OF ECMWF ENSEMBLE MEMBERS. REMNANTS OF THE

FIRST SYS KICKED ACROSS THE SW BORDER MAY INDUCE SOME GULF INFLOW

INTO THE SERN STATES NEXT WEEKEND...WITH OVERRUNNING RA AND

POSSIBLE SN ON THE NW EDGE OF THE PCPN SHIELD DEVELOPING.

CONFIDENCE IN A NUMBER OF OPERATIONAL MODEL SPECIFICS IS

SUFFICIENTLY LACKING TO FAVOR A BLEND OF 00Z GEFS/00Z ECMWF

ENSEMBLE MEANS AS THE STARTING POINT FOR THE DAYS 3-7 THU-MON

FCST. MINOR ADJUSTMENTS TO THE INITIAL BLEND WERE MADE ON ONE OR

MORE DAYS TO INCREASE DEFINITION SLIGHTLY OVER PORTIONS OF THE

NORTHWEST AND ERN CONUS/WRN ATLC. IN ADDITION SOME DEFINITION WAS

ADDED TO THE EXPECTED SRN STREAM WAVE IN LIGHT OF IMPROVED MODEL

CLUSTERING. TIMING WAS ADJUSTED TO BE JUST SLIGHTLY FASTER THAN

THE GFS/ECMWF IN LIGHT OF PRIOR CONTINUITY THAT WAS FASTER.

RAUSCH/FLOOD

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man, what amazing looking GONAPS run.... heh, 24-36 hrs of beach home eliminating followed by the makings of a Miller A at the tale end of the run.

By Scituate - been nice knowin' ya

Those poor folks in Scituate will think the wrath of god is unleashing its fury against them again with this one....god help em...though I live in Hull ,bout 400 feet from the beach..so hopefully we won't get slammed with a storm surge here...:(

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EXTENDED FORECAST DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

229 PM EST MON JAN 03 2011

VALID 12Z THU JAN 06 2011 - 12Z MON JAN 10 2011

...FINAL MEDIUM RANGE DISCUSSION...

THE MAIN ALTERATION TO THE UPDATED PRELIM PROGS WAS TO ADJUST A

POSSIBLE MAJOR STORM SWWD ALONG THE NRN MID ATLANTIC COAST IN THE

DAY 4-6 FRI-SUN TIME FRAME. 12Z/03 MODEL CONSENSUS LACKS GOOD

AGREEMENT IN ITS DEVELOPMENT...THOUGH THE 12Z GFS/UKMET ARE STILL

QUITE INTENSE WITH THE DEPTH OF THE SYS. THE MANUAL FINAL SURFACE

PROGS BACKED OFF A BIT FROM THE DEPTH THEY SHOWED IN THE UPDATED

PRELIM. WE WERE INFLUENCED IN THIS REGARD BY THE ECMWF PLAYING UP

A COMPLETELY DIFFERENT IMPULSE MOVING THRU THE BROAD CYCLONIC

VORTEX CENTERED OVER NRN PA/SRN NY STATE NEXT WEEKEND.

MORE ON 12Z MODELS: THE LATEST GFS/UKMET/CANADIAN MODELS REMAIN

CLUSTERED TO THE N OF LATITUDE 40 DEGREES WITH CLOSED CYCLONIC

ENERGY DROPPING SE FROM S CENTRAL CANADA THEN TURNING EWD ACROSS

THE ERN GREAT LAKES LAKES TOWARDS MA/RI/CAPE COD. SUCH A TRACK

WOULD BE A BIT TO THE LEFT OF THE FEB 6 1978 TRACK DESCRIBED

EARLIER. THE NEW GFS HAS TRENDED S OF ITS 00Z RUN SAT-SUN WITH ITS

MAIN UPPER ENERGY CROSSING SRN NY/SRN NEW ENG...KEEPING THE ENERGY

ABOVE LATITUDE 40. THE NEW CANADIAN IS ON THE N SIDE OF THE

ENVELOPE OF MODEL SOLUTIONS...AND THE NEW UKMET JUST A TAD TO THE

LEFT OF THE GFS SAT-SUN. THE ECMWF KEEPS IT MAIN ENERGY ALONG

LATITUDE 40 N OF ITS PRIOR 00Z RUN. STILL LOOKING AT A POTENTIAL

SNOWSTORM FOR SRN NEW ENG THIS COMING WEEKEND...BUT LESS RISK OF

IT EXTENDING S INTO THE MID ATLANTIC STATES THAN EARLIER THOUGHT.

RAUSCH/FLOOD

Aren't the two bolded lines of this discussion contradictory???

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EXTENDED FORECAST DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

229 PM EST MON JAN 03 2011

VALID 12Z THU JAN 06 2011 - 12Z MON JAN 10 2011

...FINAL MEDIUM RANGE DISCUSSION...

THE MAIN ALTERATION TO THE UPDATED PRELIM PROGS WAS TO ADJUST A

POSSIBLE MAJOR STORM SWWD ALONG THE NRN MID ATLANTIC COAST IN THE

DAY 4-6 FRI-SUN TIME FRAME. 12Z/03 MODEL CONSENSUS LACKS GOOD

AGREEMENT IN ITS DEVELOPMENT...THOUGH THE 12Z GFS/UKMET ARE STILL

QUITE INTENSE WITH THE DEPTH OF THE SYS. THE MANUAL FINAL SURFACE

PROGS BACKED OFF A BIT FROM THE DEPTH THEY SHOWED IN THE UPDATED

PRELIM. WE WERE INFLUENCED IN THIS REGARD BY THE ECMWF PLAYING UP

A COMPLETELY DIFFERENT IMPULSE MOVING THRU THE BROAD CYCLONIC

VORTEX CENTERED OVER NRN PA/SRN NY STATE NEXT WEEKEND.

MORE ON 12Z MODELS: THE LATEST GFS/UKMET/CANADIAN MODELS REMAIN

CLUSTERED TO THE N OF LATITUDE 40 DEGREES WITH CLOSED CYCLONIC

ENERGY DROPPING SE FROM S CENTRAL CANADA THEN TURNING EWD ACROSS

THE ERN GREAT LAKES LAKES TOWARDS MA/RI/CAPE COD. SUCH A TRACK

WOULD BE A BIT TO THE LEFT OF THE FEB 6 1978 TRACK DESCRIBED

EARLIER. THE NEW GFS HAS TRENDED S OF ITS 00Z RUN SAT-SUN WITH ITS

MAIN UPPER ENERGY CROSSING SRN NY/SRN NEW ENG...KEEPING THE ENERGY

ABOVE LATITUDE 40. THE NEW CANADIAN IS ON THE N SIDE OF THE

ENVELOPE OF MODEL SOLUTIONS...AND THE NEW UKMET JUST A TAD TO THE

LEFT OF THE GFS SAT-SUN. THE ECMWF KEEPS IT MAIN ENERGY ALONG

LATITUDE 40 N OF ITS PRIOR 00Z RUN. STILL LOOKING AT A POTENTIAL

SNOWSTORM FOR SRN NEW ENG THIS COMING WEEKEND...BUT LESS RISK OF

IT EXTENDING S INTO THE MID ATLANTIC STATES THAN EARLIER THOUGHT.

RAUSCH/FLOOD

Aren't the two bolded lines of this discussion contradictory???

they were saying that the main alteration WAS (at 0z) a correction sw....however "12Z/03 MODEL CONSENSUS LACKS GOOD

AGREEMENT IN ITS DEVELOPMENT"

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they were saying that the main alteration WAS (at 0z) a correction sw....however "12Z/03 MODEL CONSENSUS LACKS GOOD

AGREEMENT IN ITS DEVELOPMENT"

Okay--figured I was reading it long. Seems from their graphics that it would have snow beginning before dawn--at least in western locations--on Friday. That would fly in the face of the EC......

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Euro keying on wrong energy probably so not a huge surprise. Be great to see even the NOGAPS beat the EC.

It doesn't dig the trough at all. It brings it to NY state and then lifts ne. It's almost like the next storm on its heels acts as a kicker. I don't know what to make of it, other than some more uncertainty.

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