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January Forecast Discussion


REDMK6GLI

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It's great to see the higher ensemble and OP resolution showing up 192-384 with well defined ridge and trough areas 

on the 12z upgrade. Notice how everything looked all washed out long range on the 0z compared to the more

defined 12z. Maybe we can get them to run the ensembles to 30 days a few days a week like the Euro. ;)

 

0z

http://mp1.met.psu.edu/~fxg1/ENSHGTAVGNH_0z/ensloopmref.html

 

attachicon.giff384.gif

 

12z

http://mp1.met.psu.edu/~fxg1/ENSHGTAVGNH_12z/ensloopmref.html

 

attachicon.giff372.gif

 

I am just happy with the higher res . I don`t want another bad weekly model ( the Euro weeklies ) . Its week 3 and especially week 4 are awful .

 

At what range did the new GFS catch the Euro in the skill scoring ?

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It's great to see the higher ensemble and OP resolution showing up 192-384 with well defined ridge and trough areas 

on the 12z upgrade. Notice how everything looked all washed out long range on the 0z compared to the more

defined 12z. Maybe we can get them to run the ensembles to 30 days a few days a week like the Euro. ;)

 

Both maps are for 0z 1-30

 

0z

http://mp1.met.psu.edu/~fxg1/ENSHGTAVGNH_0z/ensloopmref.html

 

attachicon.giff384.gif

 

12z

http://mp1.met.psu.edu/~fxg1/ENSHGTAVGNH_12z/ensloopmref.html

 

attachicon.giff372.gif

Only the operational GFS was upgraded today, the GEFS haven't been upgraded yet.  Suppose to be Q1 of this year but will likely be pushed to Q2 or later, since no announcement has been made yet.  See dtk's post: http://www.americanwx.com/bb/index.php/topic/44784-t1534-gfs-gfs-at-13km-along-with-other-upgrades-can-be-found-here/?p=3194213

 

Also NWS powerpoint: http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CCcQFjAB&url=http%3A%2F%2Fwww.nws.noaa.gov%2Fdatamgmt%2Fslide_show%2Flapenta_FOS_020614.ppt&ei=2dG2VOSuCPWLsQT-94DQCg&usg=AFQjCNHXexQk2DHZ037vmmSJQLOWHnLk1g&sig2=wz0-ZJAx5iVMZsDMmQx-BA&bvm=bv.83640239,d.cWc

 

WMO pdf:  http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0CC4QFjAC&url=http%3A%2F%2Fwww.wmo.int%2Fpages%2Fprog%2Farep%2Fwwrp%2Fnew%2Fdocuments%2FWGNE29_MAR2014_NCEP_EKv3.pdf&ei=2dG2VOSuCPWLsQT-94DQCg&usg=AFQjCNFPf3uyWDjWDJwKYn4mH9pOr3MRrA&sig2=ayTtYJR4BgNoRei9JWMatg&bvm=bv.83640239,d.cWc

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Only the operational GFS was upgraded today, the GEFS haven't been upgraded yet.  Suppose to be Q1 of this year but will likely be pushed to Q2 or later, since no announcement has been made yet.  See dtk's post: http://www.americanwx.com/bb/index.php/topic/44784-t1534-gfs-gfs-at-13km-along-with-other-upgrades-can-be-found-here/?p=3194213

 

Also NWS powerpoint: http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CCcQFjAB&url=http%3A%2F%2Fwww.nws.noaa.gov%2Fdatamgmt%2Fslide_show%2Flapenta_FOS_020614.ppt&ei=2dG2VOSuCPWLsQT-94DQCg&usg=AFQjCNHXexQk2DHZ037vmmSJQLOWHnLk1g&sig2=wz0-ZJAx5iVMZsDMmQx-BA&bvm=bv.83640239,d.cWc

 

WMO pdf:  http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0CC4QFjAC&url=http%3A%2F%2Fwww.wmo.int%2Fpages%2Fprog%2Farep%2Fwwrp%2Fnew%2Fdocuments%2FWGNE29_MAR2014_NCEP_EKv3.pdf&ei=2dG2VOSuCPWLsQT-94DQCg&usg=AFQjCNFPf3uyWDjWDJwKYn4mH9pOr3MRrA&sig2=ayTtYJR4BgNoRei9JWMatg&bvm=bv.83640239,d.cWc

 

 

The ensemble mean 12z has better resolution than 0z did on PSU. Do you think that can be just 

from the operational alone making the mean more defined?

 

http://www.noaanews.noaa.gov/stories2015/20150105_supercomputer.html

 

Ahead of this upgrade, each of the two operational supercomputers will first more than triple their current capacity later this month (to at least 0.776 petaflops for a total capacity of 1.552 petaflops). With this larger capacity, NOAA’s National Weather Service in January will begin running an upgraded version of theGlobal Forecast System (GFS) with greater resolution that extends further out in time – the new GFS will increase resolution from 27km to 13km out to 10 days and 55km to 33km for 11 to 16 days. In addition, theGlobal Ensemble Forecast System (GEFS) will be upgraded by increasing the number of vertical levels from 42 to 64 and increasing the horizontal resolution from 55km to 27km out to eight days and 70km to 33km from days nine to 16.

 

Ensemble mean before 12z GFS upgrade

 

 

After 12z GFS upgrade

 

 

 

 

 

 

 

 

 

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18z GFS is OTS for the big storm next week.

gfs_mslp_pcpn_frzn_us_36.png

The synoptic pattern would favor the MA or a benchmark track right now, it'll change 10 times over but the models and ensembles have gravitated away from that period having the ridge further west and the cold dump into the west, hence I would lean away from a cutter idea for now but anything else is on the table

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I am just happy with the higher res . I don`t want another bad weekly model ( the Euro weeklies ) . Its week 3 and especially week 4 are awful .

 

At what range did the new GFS catch the Euro in the skill scoring ?

 

I just wish all long range forecasts were as good as the JMA monthlies were for last winter.

If an extended range model beyond 15 days gets just gets one or two major anomaly centers

correct, then I am happy.

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I just wish all long range forecasts were as good as the JMA monthlies were for last winter.

If an extended range model beyond 15 days gets just gets one or two major anomaly centers

correct, then I am happy.

They went wire to wire last year. They aced that pattern .

Glad the the resolution is getting better period.

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The mean is only that high because of the spread, it's 200+ hours out. The members that actually take a similar track to the mean are all sub 1000mb, at least on the gefs.

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Just reviewed the 12z gfs model.

No projected significant snow weather events for the next 10 days. ( strong odds of occuring)

Possible rain event around day 13 or 14. (medium odds of occuring)

This leave us a very small window for snow around the 22nd to 30th.

I may hendge my bets that central park gets less than 3 inches of snow  for the month at this point.

If this occurs, we may need to start talking about chasing records for least snowfall in a season.

 

Best

 

GFS model has been perfoming the best in years imop.

Checked out the 12Z model run today for a peak into the next 5-15 days.

Rain event looks likely for this Sunday-Monday around the Big Apple. Possibly some snow in the burbs to the NW.

After the storm passes, long range looks chilly and dry.

Any chances of significant snow will now occur in the final 2-4 days of the month.

 

Best.

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