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December 26-27 Storm Threat


Baroclinic Zone

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It's interesting. Even the UK looks ready to close that low awfully far south.

Yes, very close to a different solution.

The flag on the NAM is the MOS product brings waraning snows back to western MA.

What's the exact relation between the two again? I know you really like the MOS.

The east outliers on the Monday system are probably a tick west of where they were at this point Monday. The western systems in that event are further west, all bodes well I think.

Thanks for the map, UK is much more interesting than it appeared at first glance.

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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.

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What's the exact relation between the two again? I know you really like the MOS.

I think when it appears a lock for a big storm and snow numbers are low, there's something going on such as poor snow growth, a warm layer not seen...slop, etc. In both of these cases, snow numbers are high but lower on the Cape although on MAV (GFS), even HYA gets 6+. Everyone west of the canal is 8+

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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.

Uhoh...heartbroken weenies.
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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.

That whistling sound you hear is the air being let out of the weenies.

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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.

It's not on the diagnostic discussion yet, but the rumor is there were significant datapoint issues. Total rumor, but might explain how all the other models are still a miss.

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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.

Any idea what the initialization problems were?

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