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December 26-27 Storm Threat


Baroclinic Zone

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From BOX

SPECIAL NOTE AT 1140 AM...WE HAVE GOTTEN A GOOD LOOK AT THE 12Z NAM

AS WELL AS A QUICK LOOK AT THE 12Z GFS THROUGH TUESDAY /SO FAR/. WE

HAVE SEEN THE DRAMATIC TREND THAT THE GFS HAS TAKEN ON THIS RUN...AS

WELL AS THE W TREND ON THE NAM /THOUGH REMAINING WELL S OF THE

BENCHMARK/. WE WANTED TO NOTE THAT WE HAVE RECEIVED MESSAGES FROM

HPC ABOUT INITIALIZATION PROBLEMS ON BOTH THE NAM AND GFS RUNS THIS

MORNING. HAVING WORKED ON THIS DESK FOR THE LAST SEVERAL DAYS...ONE

THING THAT HAS SHOWN THROUGH IS THE LACK OF RUN-TO-RUN CONSISTENCY

BETWEEN INDIVIDUAL MODELS. WHILE WE ARE NOT RULING OUT A SHIFT TO

THE W...WE DO NOT WANT TO JUMP ON THE BANDWAGON EITHER. WANT TO

WAIT UNTIL WE GET A LOOK AT THE ECMWF RUN BEFORE MAKING ANY MAJOR

CHANGES.

Lol

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Odd. HPC says the NAM was fine in their disco but told BOX it had init errors. Agree with BOX about waffling though

MODEL DIAGNOSTIC DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

1016 AM EST FRI DEC 24 2010

VALID DEC 24/1200 UTC THRU DEC 28/0000 UTC

...SEE NOUS42 KWNO ADMNFD FOR THE STATUS OF THE UPPER AIRINGEST...

12Z NAM EVALUATION

INITIALIZATION ERRORS DO NOT APPEAR TO SIGNIFICANTLY IMPACT ITSSOLUTION.

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From BOX

SPECIAL NOTE AT 1140 AM...WE HAVE GOTTEN A GOOD LOOK AT THE 12Z NAM

AS WELL AS A QUICK LOOK AT THE 12Z GFS THROUGH TUESDAY /SO FAR/. WE

HAVE SEEN THE DRAMATIC TREND THAT THE GFS HAS TAKEN ON THIS RUN...AS

WELL AS THE W TREND ON THE NAM /THOUGH REMAINING WELL S OF THE

BENCHMARK/. WE WANTED TO NOTE THAT WE HAVE RECEIVED MESSAGES FROM

HPC ABOUT INITIALIZATION PROBLEMS ON BOTH THE NAM AND GFS RUNS THIS

MORNING. HAVING WORKED ON THIS DESK FOR THE LAST SEVERAL DAYS...ONE

THING THAT HAS SHOWN THROUGH IS THE LACK OF RUN-TO-RUN CONSISTENCY

BETWEEN INDIVIDUAL MODELS. WHILE WE ARE NOT RULING OUT A SHIFT TO

THE W...WE DO NOT WANT TO JUMP ON THE BANDWAGON EITHER. WANT TO

WAIT UNTIL WE GET A LOOK AT THE ECMWF RUN BEFORE MAKING ANY MAJOR

CHANGES.

Well that might bring people back down to earth lol. Temper expectations people lol.

Still hope the GFS is right though.

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From BOX

SPECIAL NOTE AT 1140 AM...WE HAVE GOTTEN A GOOD LOOK AT THE 12Z NAM

AS WELL AS A QUICK LOOK AT THE 12Z GFS THROUGH TUESDAY /SO FAR/. WE

HAVE SEEN THE DRAMATIC TREND THAT THE GFS HAS TAKEN ON THIS RUN...AS

WELL AS THE W TREND ON THE NAM /THOUGH REMAINING WELL S OF THE

BENCHMARK/. WE WANTED TO NOTE THAT WE HAVE RECEIVED MESSAGES FROM

HPC ABOUT INITIALIZATION PROBLEMS ON BOTH THE NAM AND GFS RUNS THIS

MORNING. HAVING WORKED ON THIS DESK FOR THE LAST SEVERAL DAYS...ONE

THING THAT HAS SHOWN THROUGH IS THE LACK OF RUN-TO-RUN CONSISTENCY

BETWEEN INDIVIDUAL MODELS. WHILE WE ARE NOT RULING OUT A SHIFT TO

THE W...WE DO NOT WANT TO JUMP ON THE BANDWAGON EITHER. WANT TO

WAIT UNTIL WE GET A LOOK AT THE ECMWF RUN BEFORE MAKING ANY MAJOR

CHANGES.

Well, there's a top-ten buzz-kill statement of 2010 making it under the wire.

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We haven't had our hearts broken by initialization errors before...unique way to get fooked.

Justin Consor and Brian/wxcentral always checked the status messages, was a force of habit. Data has been so good for so long now we've all gotten lazy.

I got an email at about 1050 about possible problems. It's usually about 1230 when NCEP updates to include the GFS and other models and obviously I'm thinking when they saw this extreme solution data was checked and errors were found.

Everyone urged caution. It's also not impossible to think the errors may be in our favor.

Anyway, CT Rain found a new way to :gun_bandana: Kev's blizzard.

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you cant use QPF off an ensemble mean for much of anything.

1 or 2 models that go crazy with QPF or convective feedback can totally skew thing.

I've always argued that SLP/QPF ensemble maps should be mean SLP and median QPF.

well, thats true. my bad, but the mean SLP placement at 72hrs is 20 miles off ACK and its at 977mb.

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