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Met Winter 2016-17 Banter


dmillz25

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23 minutes ago, Juliancolton said:

heh, I was being sarcastic. I do agree that maybe one regional snowfall map from each major model run could be acceptable in the main storm threat for posterity, but there's no need for the pages and pages of slightly different algorithms or domains or color schemes after each and every run.

Yea.  I'd be ok with meteocentre snow maps bc they are measured in LE and not some algorithm that could inflate totals. 

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6 hours ago, Rjay said:

Why is it so hard for people to post snow maps in here?

I think it's probably because people like putting everything in one place out of habit.  It's a matter of convenience (also it's easier to read when everything is in one place rather than jumping from thread to thread to thread.)  A few years ago before there were subforums we used to see ideas posted by Mets from across different regions all in one thread, and that was great too.  It's like reading a classic book and in the middle of the best part you have to look up a different book to see the details.  You'd rather everything just be in one book and you could read it from beginning to end without having to open up another book.

It might be different for people who browse from cellphones but those of us who still use computers like everything to be in one place.

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2 hours ago, alfoxyny said:

I can't believe it. MY weather underground 10 day forecast for Pomona,NY in the last hr changed tues storm totals from 8"-12" to 5"-8". They must have been chewing on GEFS jerky all night. I can't take that seriously. I may even delete them from my favorites.

WU has gone downhill since it was bought by TWC now they also charge third party developers who want to use the data on their site, which they get for FREE.  So many developers are abandoning them since they inflated the prices 400%

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Effective on or about March 15, 2017, beginning with the 1200

Coordinated Universal Time (UTC) run, the National Centers for

Environmental Prediction (NCEP) will implement Version 4 of

North American Mesoscale (NAM) and discontinue the Downscaled

GFS by NAM Extension (DGEX) Forecast System. Changes include:

 

* Discontinuing all DGEX model output

* Removing legacy NAM products on NOAAPORT and NCEP/NWS servers

* Making resolution changes for NAM nests

* Making major changes to NAM Data Assimilation System (NDAS)

* Making model changes: convection, microphysics, land-surface

upgrades; frequency of physics calls increased

 

- FORECAST MODEL CHANGES

 

1) Resolution changes to the CONUS (from 4 to 3 km), Alaska

(from 6 km to 3 km), and CONUS fire weather (from 1.333 km to

1.5 km) nests

2) More frequent calls of physics (now every 2nd time step for

all domains); change frequency of radiation updates for the NAM

12 km parent domain from hourly to every 20 minutes

3) Advect specific humidity every dynamics time step

4) Changes to Betts-Miller-Janjic convective scheme to improve

12 km parent QPF bias, especially during the cool season

5) Updated Ferrier-Aligo microphysics to improve stratiform

precipitation, better anvil reflectivity, reduce areas of

light/noisy reflectivity over oceans

6) Improved effect of frozen soil on transpiration and soil

evaporation, leads to reduced cold/moist bias during cool season

7) Radiation/microphysics changes to reduce incoming surface

shortwave radiation; reduced warm-season 2-m temperature bias

 

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2 minutes ago, bluewave said:

Effective on or about March 15, 2017, beginning with the 1200

 

Coordinated Universal Time (UTC) run, the National Centers for

 

Environmental Prediction (NCEP) will implement Version 4 of

 

North American Mesoscale (NAM) and discontinue the Downscaled

 

GFS by NAM Extension (DGEX) Forecast System. Changes include:

 

 

 

* Discontinuing all DGEX model output

 

* Removing legacy NAM products on NOAAPORT and NCEP/NWS servers

 

* Making resolution changes for NAM nests

 

* Making major changes to NAM Data Assimilation System (NDAS)

 

* Making model changes: convection, microphysics, land-surface

 

upgrades; frequency of physics calls increased

 

 

 

- FORECAST MODEL CHANGES

 

 

 

1) Resolution changes to the CONUS (from 4 to 3 km), Alaska

 

(from 6 km to 3 km), and CONUS fire weather (from 1.333 km to

 

1.5 km) nests

 

2) More frequent calls of physics (now every 2nd time step for

 

all domains); change frequency of radiation updates for the NAM

 

12 km parent domain from hourly to every 20 minutes

 

3) Advect specific humidity every dynamics time step

 

4) Changes to Betts-Miller-Janjic convective scheme to improve

 

12 km parent QPF bias, especially during the cool season

 

5) Updated Ferrier-Aligo microphysics to improve stratiform

 

precipitation, better anvil reflectivity, reduce areas of

 

light/noisy reflectivity over oceans

 

6) Improved effect of frozen soil on transpiration and soil

 

evaporation, leads to reduced cold/moist bias during cool season

 

7) Radiation/microphysics changes to reduce incoming surface

 

shortwave radiation; reduced warm-season 2-m temperature bias

 

 

 

Which version is going to be discontinued of the NAM?

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