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000
NOUS41 KWBC 291859
PNSWSH

Service Change Notice 15-05
National Weather Service Headquarters Washington DC
200 PM EST Thu Jan 29 2015

To:        Subscribers:
           -Family of Services
           -NOAA Weather Wire Service
           -Emergency Managers Weather Information Network
           -NOAAPort
           Other NWS partners and NWS employees

From:      Eli Jacks
           Chief, Fire and Public Weather Services Branch

Subject:   Addition of SUMMARY Section to Storm Prediction
           Center (SPC) Public Watch Notification Message (SEL)
           Effective April 14, 2015

Effective Tuesday, April 14, 2015, at 1500 Coordinated Universal
Time (UTC), the SPC will add a new SUMMARY section to Public
Watch Notification Messages (AWIPS ID SEL#). This additional
section will be in the free text area following the bullet format
of the primary threat information statements. The section header
is a single line with the word SUMMARY followed by a three dot
ellipsis (SUMMARY...).

The new SUMMARY section is a general 1-2 sentence statement of
the severe weather expected in and close to the watch area. This
new section facilitates consistent, forecaster-driven, concise
communication for public consumption. The SUMMARY is intended to
be useful for a variety of communication needs including web page
headlines, social media and multimedia briefings.

In addition, the technical meteorological discussion section
(DISCUSSION...) that follows the double ampersand (&&) at the
bottom of the product will no longer be included in the SEL.
discussion section is primarily for meteorological professionals.
This information will be included in a Mesoscale Discussion (MD)
product issued immediately after the SEL if the forecaster
believes there is new information superseding the pre-watch MD.

This change will support nearly simultaneous transmission of the
SEL containing public preparedness information and the Watch
Outline Update (WOU) product, which contains a computer-friendly
description of the watch spatial and temporal information.

The SUMMARY section in an MD associated with the watch and issued
immediately after the SEL will be identical to the SUMMARY
section in the SEL.

There are no changes to format or content to the MD product.

An example of the SEL with the SUMMARY section and an associated
MD are online at

http://www.spc.noaa.gov/misc/newsel.html

For more information, please contact:

 Steven Weiss
 NWS Storm Prediction Center
 Norman, OK  73072
 steven.j.weiss@noaa.gov
 405-325-2073

 John Ferree
 NWS Severe Storms Services
 Norman, OK 73072
 john.t.ferree@noaa.gov

National Service Change Notices are online at:

 http://www.weather.gov/os/notif.htm

$$




000
NOUS41 KWBC 291859
PNSWSH

Service Change Notice 15-05
National Weather Service Headquarters Washington DC
200 PM EST Thu Jan 29 2015

To:        Subscribers:
           -Family of Services
           -NOAA Weather Wire Service
           -Emergency Managers Weather Information Network
           -NOAAPort
           Other NWS partners and NWS employees

From:      Eli Jacks
           Chief, Fire and Public Weather Services Branch

Subject:   Addition of SUMMARY Section to Storm Prediction
           Center (SPC) Public Watch Notification Message (SEL)
           Effective April 14, 2015

Effective Tuesday, April 14, 2015, at 1500 Coordinated Universal
Time (UTC), the SPC will add a new SUMMARY section to Public
Watch Notification Messages (AWIPS ID SEL#). This additional
section will be in the free text area following the bullet format
of the primary threat information statements. The section header
is a single line with the word SUMMARY followed by a three dot
ellipsis (SUMMARY...).

The new SUMMARY section is a general 1-2 sentence statement of
the severe weather expected in and close to the watch area. This
new section facilitates consistent, forecaster-driven, concise
communication for public consumption. The SUMMARY is intended to
be useful for a variety of communication needs including web page
headlines, social media and multimedia briefings.

In addition, the technical meteorological discussion section
(DISCUSSION...) that follows the double ampersand (&&) at the
bottom of the product will no longer be included in the SEL.
discussion section is primarily for meteorological professionals.
This information will be included in a Mesoscale Discussion (MD)
product issued immediately after the SEL if the forecaster
believes there is new information superseding the pre-watch MD.

This change will support nearly simultaneous transmission of the
SEL containing public preparedness information and the Watch
Outline Update (WOU) product, which contains a computer-friendly
description of the watch spatial and temporal information.

The SUMMARY section in an MD associated with the watch and issued
immediately after the SEL will be identical to the SUMMARY
section in the SEL.

There are no changes to format or content to the MD product.

An example of the SEL with the SUMMARY section and an associated
MD are online at

http://www.spc.noaa.gov/misc/newsel.html

For more information, please contact:

 Steven Weiss
 NWS Storm Prediction Center
 Norman, OK  73072
 steven.j.weiss@noaa.gov
 405-325-2073

 John Ferree
 NWS Severe Storms Services
 Norman, OK 73072
 john.t.ferree@noaa.gov

National Service Change Notices are online at:

 http://www.weather.gov/os/notif.htm

$$





000
NOUS41 KWBC 282052
PNSWSH

Technical Implementation Notice 15-02
National Weather Service Headquarters Washington DC
355 PM EST Wed Jan 28 2015

To:      Subscribers:
         -Family of Services
         -NOAA Weather Wire Service
         -Emergency Managers Weather Information Network
         -NOAAPORT
         Other NWS Partners and NWS Employees

From:    Tim McClung
         Chief, NWS Science Plans Branch
         Office of Science and Technology

Subject: Updated NDFD-forced late run (GLWN) of the Great Lakes
         Wave Model system (GLW) model grid data will be provided
         over the Satellite Broadcast Network (SBN) and NOAAPORT
         effective April 28, 2015

Effective on or around Tuesday, April 28, 2015, updated GLWN
model grid data will be added to the SBN and NOAAPORT. The wave
model grids are being upgraded from a regular rectilinear 4 km
mesh to a 2.5 km Lambert Conformal grid. The hourly grids will be
disseminated in GRIB2 format.

The GRIB2 files contain 16 wave model parameters:
WIND Wind Speed
WDIR Wind Direction
U GRD U-wind component
V GRD V-wind component
HTSGW Total significant wave height
PERPW Period of Spectral Peak of the Ocean Waves
DIRPW Direction of Spectral Peak of the Ocean Waves
WVHGT Height of significant Wind Waves
WVPER Mean Period of Wind Waves
WVDIR Mean Direction of Wind Waves
SWELL Height of significant Swell Waves, Order Seq. Of Data 1
SWELL Height of significant Swell Waves, Order Seq. Of Data 2
SWDIR Mean Direction of Swell Waves, Order Seq. Of Data 1
SWDIR Mean Direction of Swell Waves, Order Seq. Of Data 2
SWPER Mean Period of Swell Waves, Order Seq. Of Data 1
SWPER Mean Period of Swell Waves, Order Seq. Of Data 2

The GLW model runs at 03z, 09z, 15z and 21z.

The average total data volume will be approximately 480 MB per
day, with 120 MB per four cycles.

The WMO Headers for these products are:
EQKA88 KWBJ
ERKA88 KWBJ
EAKA88 KWBJ
EBKA88 KWBJ
ECKA88 KWBJ
EJKA88 KWBJ
EKKA88 KWBJ
ELKA88 KWBJ
EMKA88 KWBJ
ENKA88 KWBJ
EOKA88 KWBJ
EOKA88 KWBJ
EPKA88 KWBJ
EPKA88 KWBJ
EYKA88 KWBJ
EYKA88 KWBJ

WMO Header template will follow:  T1 T2 A1 A2 ii cccc
  T1 = E
  T2 specifies parameter as follows:
      Q - Wind Speed
      R - Wind Direction
      A - U-Wind component
      B - V-Wind component
      C - Total Significant wave height
      J - Period of Spectral Peak of the Ocean Waves
      K - Direction of Spectral Peak of the Ocean Waves
      L - Height of significant Wind Waves
      M - Mean Period of Wind Waves
      N - Mean Direction of Wind Waves
      O - Height of significant Swell Waves
      P - Mean Direction of Swell Waves
      Y - Mean Period of Swell Waves
  A1 = K (Lambert Conformal - Great Lake Wave Model 2.5 km grid)
  A2 specifies the forecast hour as follows: A=00; B=01,02,03;
C=04,05,06; D=07,08,09; E=10,11,12; F=13,14,15; G=16,17,18;
H=19,20,21,22,23; I=24,25,26,27,28,29; J=30,31,32,33,34,35;
K=36,37,38,39,40,41; L=42,43,44,45,46,47;
M=48,49,50,51,52,53,54,55,56,57,58,59;
N=60,61,62,63,64,65,66,67,68,69,70,71;  O=72,73,74,75,76,77,78,79
,80,81,82,83; P=84,85,86,87,88,89,90,91,92,93,94,95;
Q=96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112
,113,114,115,116,117,118,119;
R=120,121,122,123,124,125,126,127,128,129,130,131;
S=132,133,134,145,136,137,138,139,140,141,142,143;
T=144,145*,146*,147*
      *indicates new forecast hours
  ii = 88  (Land/Water properties at the surface of earth or
Ocean)
  cccc is KWBJ


Sample GLWN products will be available at:

ftp.ncep.noaa.gov/pub/data1/nccf/com/glw

Details about the NCEP Wave Models are found online at:
http://polar.ncep.noaa.gov/waves/index2.shtml

For additional information regarding GRIB2 files, visit:
http://www.nco.ncep.noaa.gov/pmb/docs/grib2/


For questions pertaining to GLWN data, please contact:

Nicole P. Kurkowski
NWS OST Marine Program Manager
NOAA/NWS/OST/PPD Science Plans Branch
Silver Spring, MD 20910
nicole.kurkowski@noaa.gov

National TINs are online at:

http://www.weather.gov/os/notif.htm

$$




000
NOUS41 KWBC 282052
PNSWSH

Technical Implementation Notice 15-02
National Weather Service Headquarters Washington DC
355 PM EST Wed Jan 28 2015

To:      Subscribers:
         -Family of Services
         -NOAA Weather Wire Service
         -Emergency Managers Weather Information Network
         -NOAAPORT
         Other NWS Partners and NWS Employees

From:    Tim McClung
         Chief, NWS Science Plans Branch
         Office of Science and Technology

Subject: Updated NDFD-forced late run (GLWN) of the Great Lakes
         Wave Model system (GLW) model grid data will be provided
         over the Satellite Broadcast Network (SBN) and NOAAPORT
         effective April 28, 2015

Effective on or around Tuesday, April 28, 2015, updated GLWN
model grid data will be added to the SBN and NOAAPORT. The wave
model grids are being upgraded from a regular rectilinear 4 km
mesh to a 2.5 km Lambert Conformal grid. The hourly grids will be
disseminated in GRIB2 format.

The GRIB2 files contain 16 wave model parameters:
WIND Wind Speed
WDIR Wind Direction
U GRD U-wind component
V GRD V-wind component
HTSGW Total significant wave height
PERPW Period of Spectral Peak of the Ocean Waves
DIRPW Direction of Spectral Peak of the Ocean Waves
WVHGT Height of significant Wind Waves
WVPER Mean Period of Wind Waves
WVDIR Mean Direction of Wind Waves
SWELL Height of significant Swell Waves, Order Seq. Of Data 1
SWELL Height of significant Swell Waves, Order Seq. Of Data 2
SWDIR Mean Direction of Swell Waves, Order Seq. Of Data 1
SWDIR Mean Direction of Swell Waves, Order Seq. Of Data 2
SWPER Mean Period of Swell Waves, Order Seq. Of Data 1
SWPER Mean Period of Swell Waves, Order Seq. Of Data 2

The GLW model runs at 03z, 09z, 15z and 21z.

The average total data volume will be approximately 480 MB per
day, with 120 MB per four cycles.

The WMO Headers for these products are:
EQKA88 KWBJ
ERKA88 KWBJ
EAKA88 KWBJ
EBKA88 KWBJ
ECKA88 KWBJ
EJKA88 KWBJ
EKKA88 KWBJ
ELKA88 KWBJ
EMKA88 KWBJ
ENKA88 KWBJ
EOKA88 KWBJ
EOKA88 KWBJ
EPKA88 KWBJ
EPKA88 KWBJ
EYKA88 KWBJ
EYKA88 KWBJ

WMO Header template will follow:  T1 T2 A1 A2 ii cccc
  T1 = E
  T2 specifies parameter as follows:
      Q - Wind Speed
      R - Wind Direction
      A - U-Wind component
      B - V-Wind component
      C - Total Significant wave height
      J - Period of Spectral Peak of the Ocean Waves
      K - Direction of Spectral Peak of the Ocean Waves
      L - Height of significant Wind Waves
      M - Mean Period of Wind Waves
      N - Mean Direction of Wind Waves
      O - Height of significant Swell Waves
      P - Mean Direction of Swell Waves
      Y - Mean Period of Swell Waves
  A1 = K (Lambert Conformal - Great Lake Wave Model 2.5 km grid)
  A2 specifies the forecast hour as follows: A=00; B=01,02,03;
C=04,05,06; D=07,08,09; E=10,11,12; F=13,14,15; G=16,17,18;
H=19,20,21,22,23; I=24,25,26,27,28,29; J=30,31,32,33,34,35;
K=36,37,38,39,40,41; L=42,43,44,45,46,47;
M=48,49,50,51,52,53,54,55,56,57,58,59;
N=60,61,62,63,64,65,66,67,68,69,70,71;  O=72,73,74,75,76,77,78,79
,80,81,82,83; P=84,85,86,87,88,89,90,91,92,93,94,95;
Q=96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112
,113,114,115,116,117,118,119;
R=120,121,122,123,124,125,126,127,128,129,130,131;
S=132,133,134,145,136,137,138,139,140,141,142,143;
T=144,145*,146*,147*
      *indicates new forecast hours
  ii = 88  (Land/Water properties at the surface of earth or
Ocean)
  cccc is KWBJ


Sample GLWN products will be available at:

ftp.ncep.noaa.gov/pub/data1/nccf/com/glw

Details about the NCEP Wave Models are found online at:
http://polar.ncep.noaa.gov/waves/index2.shtml

For additional information regarding GRIB2 files, visit:
http://www.nco.ncep.noaa.gov/pmb/docs/grib2/


For questions pertaining to GLWN data, please contact:

Nicole P. Kurkowski
NWS OST Marine Program Manager
NOAA/NWS/OST/PPD Science Plans Branch
Silver Spring, MD 20910
nicole.kurkowski@noaa.gov

National TINs are online at:

http://www.weather.gov/os/notif.htm

$$





000
NOUS41 KWBC 281605
PNSWSH

Technical Implementation Notice 14-52
National Weather Service Headquarters Washington DC
1105 AM EST Wed Jan 28 2015

To:        Subscribers:
          -Family of Services
          -NOAA Weather Wire Service
          -Emergency Managers Weather Information Network
          -NOAAPORT
          Other NWS Partners, Users and Employees

From:     Timothy McClung
          Chief, Science Plans Branch
          Office of Science and Technology

Subject:  Corrected: Changes to the Great Lakes Wave (GLW)
          System Effective January 28, 2015

Corrected an error for the new 2.5km file names which should be:
glw.grlc_2p5km.tCCz.grib2
glwn.grlc_2p5km.tCCz.grib2
not
glw.tCCz.grlc_2p5km.grib2
glwn.tCCz.grlc_2p5km.grib2.

Also, the implementation date changed from January 27, 2015, to
January 28, 2015, because of a critical weather day.

Effective Wednesday, January 28, 2015, beginning with the 1200
Coordinated Universal Time (UTC) run, the National Centers for
Environmental Prediction (NCEP) will upgrade the Great Lakes
Wave forecasting system (GLW), affecting both early and late
runs:

Early run: GLW: at 00Z, 06Z, 12Z and 18Z
Late runs: GLWN: at 03Z, 09Z, 15Z and 21Z

Changes include:

-Increased spatial grid resolution to 2.5km using a curvilinear
Lambert conformal grid
-Increased spectral resolution to expand range to 1Hz
-Increased resolution of input wind fields from NAM smartinit
-Improved ice concentration analysis
-Switch to latest wave model version, WAVEWATCH III v4.15.1

The implications of the changes are as follows:

1. Increased spatial grid resolution to 2.5km is expected to
bring improvements in the quality of forecasting with higher
resolution grid better resolving coastal features and better
representing wind fetch geometry near shore and during rapidly
changing conditions. To that end, NCEP is using a new
bathymetric database made available by the NOAA Great Lakes
Research Laboratory (GLERL) at a 30 arcsec resolution, in
association with high-resolution coastlines from NOAA Office
for Coastal Management Digital Coast database, to build the
new grids.

2. Spectral resolution will be increased to expand the resolved
frequency range internally to 1Hz, matching the GLW spectral
range extent to that of other wave models, allowing later
introduction of more advanced physics packages.

3. Increased resolution of input wind fields from NAM
atmospheric model smartinit files will allow improved resolution
of wind fields from current 12km to the 4km NAM nest data, with
expected impacts to storm wave forecasting and nearshore
wave growth.

4. The increased resolution of the input wind fields will delay
the GLW runs by 40 to 50 minutes.

5. Improved ice concentration analysis will result in better
representation of ice coverage during winter months, which will
render the model a more realistic representation of areas in the
lakes basins exposed to waves.

6. Extension of forecast range in the GLWN runs to 147h
addresses Weather Forecast Offices request to fulfil their
mission of providing forecasts up to that range.

7. Upgrade to the latest WAVEWATCH III code follows regular
procedure to bring all wave models towards using the latest
available technology.

Output Product Changes

NCEP FTP/HTTP Server:

New output files using the native curvilinear Lambert conformal
wave model grid at 2.5km resolution will replace the existing
4km resolution files. The new 2.5km resolution files will also have
a new naming convention.

- New 2.5km Datasets

glw.grlc_2p5km.tCCz.grib2 - NAM smartinit forcing
glwn.grlc_2p5km.tCCz.grib2 - NDFD forcing

- Removed Datasets

glw.grl.tCCz.grib2 - 4km wave grid, NAM forcing
glwn.grl.tCCz.grib2 - 4km wave grid, NDFD forcing

glw.grl.tCCz.ice - 4km wave grid, NAM forcing ice binary
glw.grl.tCCz.restart - 4km wave grid, NAM forcing restart binary
glw.grl.tCCz.wind - 4km wave grid, NAM forcing wind binary
glwn.grl.tCCz.ice - 4km wave grid, NDFD forcing ice binary
glwn.grl.tCCz.restart - 4km wave grid, NDFD forcing restart
binary
glwn.grl.tCCz.wind - 4km wave grid, NDFD forcing wind binary

NOMADS:

The existing 4km wave grid GLW/GLWN datasets available via DODS
and Grib Filter will be transitioned to use the 2.5km datasets.

NOAAPORT/SBN:

4km wave grid datasets from the late run GLWN will continue to
be disseminated via AWIPS for use by NWS Weather Forecasting
Offices (WFOs). The grids will eventually be replaced in AWIPS by the
2.5km curvilinear wave grid datasets and phased out in a
subsequent GLW system upgrade expected to occur in mid-2015.

Data Availability

The output data from these models are disseminated on the NCEP
server at

http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/prod/

and

ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/wave/prod/

Sample output files from the new physics are available at

ftp://polar.ncep.noaa.gov/pub/waves/dev/

Details about the NCEP Wave Models are found online at:

http://polar.ncep.noaa.gov/waves/index2.shtml

A consistent parallel feed of data is available on the NCEP
server via the following URLs:

http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/para

ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/wave/para

NCEP urges all users to ensure their decoders can handle changes
in content order, changes in the scaling factor component within
the product definition section (PDS) of the GRIB files, changes
to the GRIB Bit Map Section (BMS), and volume changes. These
elements may change with future NCEP model implementations. NCEP
will make every attempt to alert users to these changes before
implementation.

For questions regarding these model changes, please contact:

  Hendrik Tolman
  NCEP/Marine Modeling and Analysis Branch,
  College Park, Maryland
  301-683-3748
  hendrik.tolman@noaa.gov

For questions regarding the dataflow aspects of these data sets,
please contact:

  Justin Cooke
  NCEP/NCO Dataflow Team
  College Park, Maryland 20746
  301-683-3833
  ncep.list.pmb-dataflow@noaa.gov

NWS National Technical Implementation Notices are online at:

  http://www.nws.noaa.gov/os/notif.htm

$$




000
NOUS41 KWBC 281605
PNSWSH

Technical Implementation Notice 14-52
National Weather Service Headquarters Washington DC
1105 AM EST Wed Jan 28 2015

To:        Subscribers:
          -Family of Services
          -NOAA Weather Wire Service
          -Emergency Managers Weather Information Network
          -NOAAPORT
          Other NWS Partners, Users and Employees

From:     Timothy McClung
          Chief, Science Plans Branch
          Office of Science and Technology

Subject:  Corrected: Changes to the Great Lakes Wave (GLW)
          System Effective January 28, 2015

Corrected an error for the new 2.5km file names which should be:
glw.grlc_2p5km.tCCz.grib2
glwn.grlc_2p5km.tCCz.grib2
not
glw.tCCz.grlc_2p5km.grib2
glwn.tCCz.grlc_2p5km.grib2.

Also, the implementation date changed from January 27, 2015, to
January 28, 2015, because of a critical weather day.

Effective Wednesday, January 28, 2015, beginning with the 1200
Coordinated Universal Time (UTC) run, the National Centers for
Environmental Prediction (NCEP) will upgrade the Great Lakes
Wave forecasting system (GLW), affecting both early and late
runs:

Early run: GLW: at 00Z, 06Z, 12Z and 18Z
Late runs: GLWN: at 03Z, 09Z, 15Z and 21Z

Changes include:

-Increased spatial grid resolution to 2.5km using a curvilinear
Lambert conformal grid
-Increased spectral resolution to expand range to 1Hz
-Increased resolution of input wind fields from NAM smartinit
-Improved ice concentration analysis
-Switch to latest wave model version, WAVEWATCH III v4.15.1

The implications of the changes are as follows:

1. Increased spatial grid resolution to 2.5km is expected to
bring improvements in the quality of forecasting with higher
resolution grid better resolving coastal features and better
representing wind fetch geometry near shore and during rapidly
changing conditions. To that end, NCEP is using a new
bathymetric database made available by the NOAA Great Lakes
Research Laboratory (GLERL) at a 30 arcsec resolution, in
association with high-resolution coastlines from NOAA Office
for Coastal Management Digital Coast database, to build the
new grids.

2. Spectral resolution will be increased to expand the resolved
frequency range internally to 1Hz, matching the GLW spectral
range extent to that of other wave models, allowing later
introduction of more advanced physics packages.

3. Increased resolution of input wind fields from NAM
atmospheric model smartinit files will allow improved resolution
of wind fields from current 12km to the 4km NAM nest data, with
expected impacts to storm wave forecasting and nearshore
wave growth.

4. The increased resolution of the input wind fields will delay
the GLW runs by 40 to 50 minutes.

5. Improved ice concentration analysis will result in better
representation of ice coverage during winter months, which will
render the model a more realistic representation of areas in the
lakes basins exposed to waves.

6. Extension of forecast range in the GLWN runs to 147h
addresses Weather Forecast Offices request to fulfil their
mission of providing forecasts up to that range.

7. Upgrade to the latest WAVEWATCH III code follows regular
procedure to bring all wave models towards using the latest
available technology.

Output Product Changes

NCEP FTP/HTTP Server:

New output files using the native curvilinear Lambert conformal
wave model grid at 2.5km resolution will replace the existing
4km resolution files. The new 2.5km resolution files will also have
a new naming convention.

- New 2.5km Datasets

glw.grlc_2p5km.tCCz.grib2 - NAM smartinit forcing
glwn.grlc_2p5km.tCCz.grib2 - NDFD forcing

- Removed Datasets

glw.grl.tCCz.grib2 - 4km wave grid, NAM forcing
glwn.grl.tCCz.grib2 - 4km wave grid, NDFD forcing

glw.grl.tCCz.ice - 4km wave grid, NAM forcing ice binary
glw.grl.tCCz.restart - 4km wave grid, NAM forcing restart binary
glw.grl.tCCz.wind - 4km wave grid, NAM forcing wind binary
glwn.grl.tCCz.ice - 4km wave grid, NDFD forcing ice binary
glwn.grl.tCCz.restart - 4km wave grid, NDFD forcing restart
binary
glwn.grl.tCCz.wind - 4km wave grid, NDFD forcing wind binary

NOMADS:

The existing 4km wave grid GLW/GLWN datasets available via DODS
and Grib Filter will be transitioned to use the 2.5km datasets.

NOAAPORT/SBN:

4km wave grid datasets from the late run GLWN will continue to
be disseminated via AWIPS for use by NWS Weather Forecasting
Offices (WFOs). The grids will eventually be replaced in AWIPS by the
2.5km curvilinear wave grid datasets and phased out in a
subsequent GLW system upgrade expected to occur in mid-2015.

Data Availability

The output data from these models are disseminated on the NCEP
server at

http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/prod/

and

ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/wave/prod/

Sample output files from the new physics are available at

ftp://polar.ncep.noaa.gov/pub/waves/dev/

Details about the NCEP Wave Models are found online at:

http://polar.ncep.noaa.gov/waves/index2.shtml

A consistent parallel feed of data is available on the NCEP
server via the following URLs:

http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/para

ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/wave/para

NCEP urges all users to ensure their decoders can handle changes
in content order, changes in the scaling factor component within
the product definition section (PDS) of the GRIB files, changes
to the GRIB Bit Map Section (BMS), and volume changes. These
elements may change with future NCEP model implementations. NCEP
will make every attempt to alert users to these changes before
implementation.

For questions regarding these model changes, please contact:

  Hendrik Tolman
  NCEP/Marine Modeling and Analysis Branch,
  College Park, Maryland
  301-683-3748
  hendrik.tolman@noaa.gov

For questions regarding the dataflow aspects of these data sets,
please contact:

  Justin Cooke
  NCEP/NCO Dataflow Team
  College Park, Maryland 20746
  301-683-3833
  ncep.list.pmb-dataflow@noaa.gov

NWS National Technical Implementation Notices are online at:

  http://www.nws.noaa.gov/os/notif.htm

$$





000
NOUS41 KWBC 271916
PNSWSH

Service Change Notice 15-04
National Weather Service Headquarters Washington DC
217 PM EST Tue Jan 27 2015

TO:      Subscribers:
         -Family of Services
         -NOAA Weather Wire Service
         -Emergency Managers Weather Information Network
         -NOAAPORT
         Other NWS Partners and NWS employees

FROM:    David Novak
         Director, Weather Prediction Center

SUBJECT: Downscaled version of WPC Probabilistic Winter
         Precipitation Forecasts (GRIB only) Effective
         February 26, 2015

Effective Thursday, February 26, 2015, at 1800 Coordinated
Universal Time (UTC), the National Centers for Environmental
Prediction (NCEP) Weather Prediction Center (WPC) will add a
downscaled version of the Probabilistic Winter Precipitation
Forecasts (PWPF) of snow and ice accumulation.

Currently smooth probabilistic information is provided on the
National Digital Forecast Database (NDFD) 5 km horizontal
resolution grid. WPC will add a downscaled version of the PWPF
data on the 2.5 km NDFD grid. The addition only affects GRIB
data and is not reflected in web or GIS products. The addition
is based on numerous stakeholder requests and is part of
continual product improvement. The downscaling uses monthly
PRISM data. Enhanced product detail is most evident in the
western United States, with lessor effects in the East.

Current 5 km PWPF snow and ice forecasts in GRIB2 format are
available at:

  ftp://ftp.wpc.ncep.noaa.gov/pwpf/conus/

The additional downscaled PWPF snow and ice forecasts in GRIB2
format will be available after 1800 UTC, February 26, 2015, at:

  ftp://ftp.wpc.ncep.noaa.gov/pwpf/conus_2.5km

No changes will be made to WMO headers or web products; however,
grid file sizes for the full PWPF suite will increase from
approximately 2 mb to as much as 100 mb in aggregate size.

For more information, please contact:

  David.Novak@noaa.gov
  301-683-1484

National Service Change Notices are online at:

  http://www.weather.gov/os/notif.htm

$$





000
NOUS41 KWBC 271916
PNSWSH

Service Change Notice 15-04
National Weather Service Headquarters Washington DC
217 PM EST Tue Jan 27 2015

TO:      Subscribers:
         -Family of Services
         -NOAA Weather Wire Service
         -Emergency Managers Weather Information Network
         -NOAAPORT
         Other NWS Partners and NWS employees

FROM:    David Novak
         Director, Weather Prediction Center

SUBJECT: Downscaled version of WPC Probabilistic Winter
         Precipitation Forecasts (GRIB only) Effective
         February 26, 2015

Effective Thursday, February 26, 2015, at 1800 Coordinated
Universal Time (UTC), the National Centers for Environmental
Prediction (NCEP) Weather Prediction Center (WPC) will add a
downscaled version of the Probabilistic Winter Precipitation
Forecasts (PWPF) of snow and ice accumulation.

Currently smooth probabilistic information is provided on the
National Digital Forecast Database (NDFD) 5 km horizontal
resolution grid. WPC will add a downscaled version of the PWPF
data on the 2.5 km NDFD grid. The addition only affects GRIB
data and is not reflected in web or GIS products. The addition
is based on numerous stakeholder requests and is part of
continual product improvement. The downscaling uses monthly
PRISM data. Enhanced product detail is most evident in the
western United States, with lessor effects in the East.

Current 5 km PWPF snow and ice forecasts in GRIB2 format are
available at:

  ftp://ftp.wpc.ncep.noaa.gov/pwpf/conus/

The additional downscaled PWPF snow and ice forecasts in GRIB2
format will be available after 1800 UTC, February 26, 2015, at:

  ftp://ftp.wpc.ncep.noaa.gov/pwpf/conus_2.5km

No changes will be made to WMO headers or web products; however,
grid file sizes for the full PWPF suite will increase from
approximately 2 mb to as much as 100 mb in aggregate size.

For more information, please contact:

  David.Novak@noaa.gov
  301-683-1484

National Service Change Notices are online at:

  http://www.weather.gov/os/notif.htm

$$




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