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November 2012 Observations and Discussions


Snow_Miser

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6z Nogaps lost the GLC. Now shows similiar to what the Euro is showing.

https://www.fnmoc.na...tau=108&set=All

considering that we have had 2 major coastal storms already this season don't be surprised as we get closer to the event the Euro adjusts north and the final track ends up being from the VA Capes to just off New England - hard to believe with the Neg Nao/AO developing strong and the warm ocean and all the energy involved and what has happened already along the coast that this is going to just scoot harmlessly out to the south with no precip............

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considering that we have had 2 major coastal storms already this season don't be surprised as we get closer to the event the Euro adjusts north and the final track ends up being from the VA Capes to just off New England - hard to believe with the Neg Nao/AO developing strong and the warm ocean and all the energy involved and what has happened already along the coast that this is going to just scoot harmlessly out to the south with no precip............

Euro did adjust north on the 0z run but still shows a weak low. Low is about to cross NJ.

00zeuro850mbTSLPUS096.gif

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Euro did adjust north on the 0z run but still shows a weak low. Low is about to cross NJ.

00zeuro850mbTSLPUS096.gif

We are still 4 days away - still alot of time for the Euro and the other models to get this right and they will as we get into the sunday/monday time frame - another thing is we have had such a long stretch of dry weather this month since the snowstorm on the 7th/ 8th we are overdue for a significant event - whether or not it ends up being major is the unknown at this point .............but many times at the beginning and end of pattern changes is when we get the significant/major events

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HPC went with the 0z Euro mean in their discussion for next week's disturbance.

"RELIED ON THE 00Z/23 ECENS MEAN TO UPDATE THE PRELIMINARY FRONTS

AND PRESSURES FOR DAYS 3 THROUGH 7. THE ECENS MEAN HAS BEEN STABLE

FOR A COUPLE MODEL CYCLES NOW, INDICATING A FLATTER, FASTER FLOW

ACROSS THE UNITED STATES AT THE MEDIUM RANGE THAN THE OTHER GLOBAL

NUMERICAL MODELS. THE 06Z/23 GEFS MEAN TRENDED TOWARD THE ECENS

SOLUTION, WITH THE 00Z/23 UKMET ON THE QUICK SIDE OF THE GUIDANCE

AS WELL. THE ECENS MEAN HAS BEEN A STRONG PERFORMER AT THE MEDIUM

RANGE FOR THE PAST SEVERAL MONTHS, IN SOME INSTANCES DEMONSTRATING

COMPARABLE SKILL A DAY OR TWO SOONER THAN THE DETERMINISTIC

MODELS. THE BIGGEST SENSIBLE WEATHER DIFFERENCE BETWEEN THE ECENS

MEAN/ECMWF AND THE SLOWER, DEVELOPED MODELS, INCLUDING THE GFS AND

GEM GLOBAL, IS CLEARING THE OHIO VALLEY OF PRECIPITATION A HALF OR

FULL DAY SOONER, WITH LESS MERIDIONAL TRANSPORT OF MOISTURE. THE

GFS GUIDANCE IS AN OUTLIER OVER THE FAR WEST WITH THE HANDLING OF

THE ENERGY COMING OFF THE PACIFIC, SO WAS NOT CONSIDERED FOR

INCLUSION IN THIS FORECAST PACKAGE THERE, EITHER."

http://www.hpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=pmdepd

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HPC went with the 0z Euro mean in their discussion for next week's disturbance.

"RELIED ON THE 00Z/23 ECENS MEAN TO UPDATE THE PRELIMINARY FRONTS

AND PRESSURES FOR DAYS 3 THROUGH 7. THE ECENS MEAN HAS BEEN STABLE

FOR A COUPLE MODEL CYCLES NOW, INDICATING A FLATTER, FASTER FLOW

ACROSS THE UNITED STATES AT THE MEDIUM RANGE THAN THE OTHER GLOBAL

NUMERICAL MODELS. THE 06Z/23 GEFS MEAN TRENDED TOWARD THE ECENS

SOLUTION, WITH THE 00Z/23 UKMET ON THE QUICK SIDE OF THE GUIDANCE

AS WELL. THE ECENS MEAN HAS BEEN A STRONG PERFORMER AT THE MEDIUM

RANGE FOR THE PAST SEVERAL MONTHS, IN SOME INSTANCES DEMONSTRATING

COMPARABLE SKILL A DAY OR TWO SOONER THAN THE DETERMINISTIC

MODELS. THE BIGGEST SENSIBLE WEATHER DIFFERENCE BETWEEN THE ECENS

MEAN/ECMWF AND THE SLOWER, DEVELOPED MODELS, INCLUDING THE GFS AND

GEM GLOBAL, IS CLEARING THE OHIO VALLEY OF PRECIPITATION A HALF OR

FULL DAY SOONER, WITH LESS MERIDIONAL TRANSPORT OF MOISTURE. THE

GFS GUIDANCE IS AN OUTLIER OVER THE FAR WEST WITH THE HANDLING OF

THE ENERGY COMING OFF THE PACIFIC, SO WAS NOT CONSIDERED FOR

INCLUSION IN THIS FORECAST PACKAGE THERE, EITHER."

http://www.hpc.ncep....php?disc=pmdepd

They do seem confused!

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HPC has us in the .25 - .50 range for precip days 4 - 5 - question now is how much of that will be frozen ?

http://www.hpc.ncep.noaa.gov/qpf/95e12p48iwbg_fill.gif

HPC went with the 0z Euro mean in their discussion for next week's disturbance.

"RELIED ON THE 00Z/23 ECENS MEAN TO UPDATE THE PRELIMINARY FRONTS

AND PRESSURES FOR DAYS 3 THROUGH 7. THE ECENS MEAN HAS BEEN STABLE

FOR A COUPLE MODEL CYCLES NOW, INDICATING A FLATTER, FASTER FLOW

ACROSS THE UNITED STATES AT THE MEDIUM RANGE THAN THE OTHER GLOBAL

NUMERICAL MODELS. THE 06Z/23 GEFS MEAN TRENDED TOWARD THE ECENS

SOLUTION, WITH THE 00Z/23 UKMET ON THE QUICK SIDE OF THE GUIDANCE

AS WELL. THE ECENS MEAN HAS BEEN A STRONG PERFORMER AT THE MEDIUM

RANGE FOR THE PAST SEVERAL MONTHS, IN SOME INSTANCES DEMONSTRATING

COMPARABLE SKILL A DAY OR TWO SOONER THAN THE DETERMINISTIC

MODELS. THE BIGGEST SENSIBLE WEATHER DIFFERENCE BETWEEN THE ECENS

MEAN/ECMWF AND THE SLOWER, DEVELOPED MODELS, INCLUDING THE GFS AND

GEM GLOBAL, IS CLEARING THE OHIO VALLEY OF PRECIPITATION A HALF OR

FULL DAY SOONER, WITH LESS MERIDIONAL TRANSPORT OF MOISTURE. THE

GFS GUIDANCE IS AN OUTLIER OVER THE FAR WEST WITH THE HANDLING OF

THE ENERGY COMING OFF THE PACIFIC, SO WAS NOT CONSIDERED FOR

INCLUSION IN THIS FORECAST PACKAGE THERE, EITHER."

http://www.hpc.ncep....php?disc=pmdepd

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