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akrherz / iem

Code that makes the Iowa Environmental Mesonet run, or run into the ground.
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Large MOS NWS Change to consider #205

Closed akrherz closed 4 years ago

akrherz commented 5 years ago

Lots of meat here to digest

NOUS41 KWBC 191845 AAC
PNSWSH

Service Change Notice 19-61 Updated
National Weather Service Headquarters Silver Spring MD
249 PM EDT Thu Sept 19 2019

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

From: David Ruth
   NWS Office of Science and Technology Integration
   Meteorological Development Laboratory

Subject:  Updated: Changes to LAMP station-based and gridded
guidance effective on or about October 22, 2019

Updated to change the implementation date to on or about
Tuesday, October 22, 2019

On or about Tuesday, October 22, 2019, beginning with the 1400
Coordinated Universal Time (UTC) model run, the NWS
Meteorological Development Laboratory (MDL) will implement
changes to the Localized Aviation Model Output Statistics
Program (LAMP) station-based and Gridded LAMP (GLMP) guidance.
Once the date is finalized, this notice will be updated with
that information.

Changes included with this upgrade are as follows:

1. Refresh of ceiling height (cig), visibility (vis), and
obstruction to vision (obv) guidance at stations using updated
Global Forecast System (GFS)-based MOS and updated High
Resolution Rapid Refresh (HRRR) Version 3 data. In addition,
guidance for the above elements has been extended from 25 out to
38 hours once an hour (HH) at the nominal HH:30 runtimes.

2. Miscellaneous station changes:

    Additional guidance for precipitation type, sky cover,
conditional ceiling, and conditional visibility will be
available for 330 stations in the LAMP text bulletin (LAVUSA)
and BUFR message. Guidance for cig, vis, and obv  has also been
added for a small number of stations that did not have this
guidance previously.

    Station KSBD - San Bernardino, CA, is being added to the
LAMP system.

    The station identifier for Heber City Municipal Airport,
UT, is changing from K36U to KHCR.

    A summary of the station changes is available at:

    https://www.weather.gov/mdl/lamp_newguidance_v2.2.0

3. Text bulletin changes: the header row of the text bulletin
currently contains the hour of the cycle and 00 regardless of
the actual minute runtime of the cycle, e.g., HH00 UTC.  With
this implementation, the minutes in the cycle time will reflect
the nominal minutes of the runtime, e.g., HH00, HH15, HH30, or
HH45.

4. New text bulletins:

    Addition of extended text bulletins containing guidance
for cig, vis, and obv for 26 through 38 hours.

    Addition of full text bulletins containing guidance for
all elements through 25 hours, and for cig, vis, and obv out to
38 hours.  All elements without guidance past 25 hours will
contain missing values as placeholders until that extended
guidance is available.The full bulletins will not be
disseminated due to exceeding line length limitations, and will
only appear on the LAMP website.

5. Expansion of GLMP cig and vis guidance to cover the full 2.5-
km National Blend of Models (NBM) CONUS domain (2345 x 1597),
and extension of forecast projections through 38 hours in
support of the NBM. This includes the following GLMP elements:

    1) Observations (0-hour) and forecasts (1-38 hours) of
deterministic cig.
    2) Observations (0-hour) and forecasts (1-38 hours) of
deterministic vis.
    3) Forecasts (1-38 hours) of probability of cig <500 ft,
<1000 ft, and <=3000 ft.
    4) Forecasts (1-38 hours) of probability of vis <1 mi, <3
mi, and <=5 mi.

Links to sample data for this upgrade can be found at the LAMP
Experimental Products website:
https://www.weather.gov/mdl/lamp_experimental

Benefits of the system changes include:

    1) Updated cig, vis and obv guidance by using updated GFS
MOS and HRRR data.
    2) Extension of cig and vis guidance to 38 hours will
assist with Digital Aviation Services and production of 30-h
TAFs.
    3) Expansion of GLMP cig and vis guidance to cover the full
NBM CONUS domain and extension to 38 hours will support the
short-term NBM.
    4) Additional station inputs to GLMP will improve the
analysis for cig and vis.
    5) Additional elements added for 330 stations, addition of
KSBD, and change to the identifier for Heber City UT will
benefit users of LAMP guidance.

More details about LAMP/GLMP products and this implementation
can be found online at the LAMP Documentation web site:
http://www.weather.gov/mdl/lamp_docs

Changes to Dissemination:

    1) New "extended" text bulletins (LEVUSA) for 26 through 38
hours will be disseminated over the SBN/NOAAPORT each hour under
WMO header FEUS11 KWNO and AWIPS identifier LEVUSA, and will be
made available on NCEP Web Services at the following locations
as of the effective date:
https://ftp.ncep.noaa.gov/data/nccf/com/lmp/prod
https://nomads.ncep.noaa.gov/pub/data/nccf/com/lmp/prod

with filenames: lmp_lavtxt_ext.tHH30z (where HH=00, 01, , 23)

For user convenience, the currently operational 1-25 hour
(LAVUSA) messages will also be available at this new location in
addition to their current location with filenames:
lmp_lavtxt.tHHMMz (where HH=00, 01,. . ., 23; MM=00, 15, 30,
45).

    2)Due to SBN bandwidth limitations, the expanded GLMP cig
and vis guidance on the 2.5km NBM CONUS grid for 1-38 hours will
not be disseminated over SBN/NOAAPORT at this time, but will be
made available on NCEP Web Services in GRIB2 format at the
following locations as of the effective date:

https://ftp.ncep.noaa.gov/data/nccf/com/glmp/prod

https://nomads.ncep.noaa.gov/pub/data/nccf/com/glmp/prod

With filenames: glmp.tHH30z.master.fPPP.grib2 (where HH=00, 01,
. . ., 23; PPP=000 indicates the observation analyses, PPP=001,
002,. . ., 038 indicates the forecast projection in hours from
runtime HH).

Note that the GLMP cig and vis GRIB2 data on NCEP Web Services
cover the full CONUS domain through 17 hours, and the coverage
is clipped to the CONUS, Canada, and near-shore waters beyond 17
hours due to a lack of skill in the Atlantic and Pacific Oceans
and the Gulf of Mexico at those projections.

GLMP cig and vis guidance through 25 hours on the NDFD CONUS
extent will continue to be disseminated over SBN/NOAAPORT in
GRIB2 format and will continue to be available on the NWS TGFTP
server in NDGD.

There are no other changes to the dissemination with this
implementation. The LAMP and GLMP products will continue to be
available in operational NDGD, SBN, NOAAPORT and NWS ftp server.

Output on the NWS Web Servers will also be updated to contain
the new model output but the core contents (variables, file
size) will not change.Details for the locations of the LAMP
and GLMP products on the NWS ftp server can be found here:
https://www.weather.gov/mdl/lamp_NWS_ftp_server

Complete lists of LAMP and GLMP WMO headers can be found here:

LAMP headers:
https://www.weather.gov/media/mdl/lampheaders_vert_structure_v2.
2.0.pdf

GLMP headers:
http://www.weather.gov/media/mdl/glmpheaders_2016.pdf

The communication identifiers for the LAMP text and BUFR
products are shown in Tables 1 and 2 below.  WMO headers for
GLMP cig and vis are shown in Table 3 below.

Table 1: Communication identifiers for the GFS-based LAMP
products in ASCII format. Listed below are the WMO heading and
the AWIPS identifier.

WMO heading    AWIPS ID   Description
-----------    --------   -------------
FOUS11 KWNO    LAVUSA  1-25 hour bulletin
FEUS11 KWNO    LEVUSA  Extended 26-38 hour bulletin (new)

Table 2: Communication identifiers for the GFS-based LAMP
products in BUFR format.  Listed below are the WMO headings.

WMO heading    Region
-----------    ------
JSMF10 KWNO    LAMP BUFR Pacific Region
JSMF11 KWNO    LAMP BUFR Northeast Region
JSMF12 KWNO    LAMP BUFR Southeast Region
JSMF13 KWNO    LAMP BUFR North Central Region
JSMF14 KWNO    LAMP BUFR South Central Region
JSMF15 KWNO    LAMP BUFR Rocky Mountains Region
JSMF16 KWNO    LAMP BUFR West Coast Region
JSMF17 KWNO    LAMP BUFR Alaska Region

Table 3. WMO headers and superheaders for GLMP cig and vis
guidance in GRIB2 format.

WMO heading    Element Name
-----------    ------------------------
LCUAii KMDL    Ceiling height (0-h), ii=00-23
LMUZ98 KMDL    Ceiling height (1-38 h)
LMCZ98 KMDL    Ceiling height prob <500 ft (1-38 h)
LMDZ98 KMDL    Ceiling height prob <1000 ft (1-38 h)
LMFZ98 KMDL    Ceiling height prob <=3000 ft (1-38 h)
LDUAii KMDL    Visibility (0-h), ii=00-23
LNUZ98 KMDL    Visibility (1-38 h)
LNCZ98 KMDL    Visibility prob <1 mi (1-38 h)
LNEZ98 KMDL    Visibility prob <3 mi (1-38 h)
LNFZ98 KMDL    Visibility prob <=5 mi (1-38 h)

A consistent parallel feed of data is available on the NCEP
parallel NOMADS site.  Sample data for the 1-25 hour text
bulletins and 26-38 hour text bulletins can be found here:
https://para.nomads.ncep.noaa.gov/pub/data/nccf/com/lmp/para

Sample master GRIB2 files containing cig and vis through 38
hours on the expanded NBM domain can be found here:

https://para.nomads.ncep.noaa.gov/pub/data/nccf/com/glmp/para

Questions concerning parallel data should be directed to the
NCEP Dataflow team at ncep.pmb.dataflow@noaa.gov.

Questions, comments or requests regarding this change should be
directed to the contact below.We will review feedback and
decide whether to proceed.

 Judy Ghirardelli
 National Weather Service
 Meteorological Development Laboratory
 Judy.Ghirardelli@noaa.gov
 301-427-9496

Links to the LAMP products and descriptions can be found at:
    http://www.weather.gov/mdl/lamp_home

National Service Change Notices are online at:
    http://www.weather.gov/os/notif.htm
akrherz commented 4 years ago

Reviewing this, I am struggling to find an excuse to implement it. So will close it for now.