NOUS41 KWBC 281520
PNSWSH
Technical Implementation
Notice 12-09
National Weather Service
Headquarters Washington DC
1020 AM EST Tue FEB 28 2012
To: Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather
Information Network
-NOAAPORT
-Other NWS Partners, Users and
Employees
From: Tim McClung
Science Plans Branch Chief
Office of Science and Technology
Subject: Addition of Experimental 2.5-km GFS-based
Gridded MOS Guidance for CONUS
Effective immediately, NWS
is producing experimental Global Forecast System (GFS)-based gridded MOS
guidance for the CONUS at 2.5-km resolution. These products are now available
on the NWS FTP server in GRIB2 format. GRIB2 file names for each gridded MOS element
are listed in Table 1 below. On a future
date to be announced, these products will be disseminated across the Satellite
Broadcast Network (SBN) and NOAAPORT.
These gridded MOS products
contain guidance on a 2.5 km Lambert Conformal grid covering the same expanse
as the National Digital Forecast Database (NDFD) CONUS grid. Grids are being
generated from the 0000 and 1200 Universal Coordinated Time (UTC) model runs at
projections of 1 to 7 days in advance. Guidance is available for the following
elements:
Daytime Maximum and Nighttime Minimum
Temperature
2-Meter Temperature
2-Meter Dewpoint Temperature
Relative Humidity
Wind Direction
Wind Speed
Wind Gusts
Probability of Precipitation /6-h and 12-h/
Probability of a Thunderstorm /3-, 6-, and
12-h/
Quantitative Precipitation Amount /6-h and
12-h/
Total Sky Cover
24-h Snowfall Amount
On a date to be announced, NWS will replace the
2.5-km gridded MOS probability of precipitation (PoP) and quantitative
precipitation forecasts (QPF) with an enhanced-resolution PoP and QPF product
(HRMOS QPF). The improved QPF forecasts are developed
from archived stage IV national mosaic precipitation data and incorporate high
resolution topographic and climatological interactive predictors. The following link provides details about the
enhanced-resolution PoP and QPF:
http://www.nws.noaa.gov/mdl/hrqpf/
A Web page providing more
information regarding grid specifications, GRIB2 encoding and elements for
which guidance is available is referenced below.
These GRIB2 products are
now available in the experimental area of the National Digital Guidance
Database (NDGD) on the NWS ftp server. Forecast guidance for days 1 through 3 is available at:
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.mosgfs/AR.conus/VP.001-003/
Forecast
guidance for days 4 through 7 are available at:
ftp://tgftp.nws.noaa.gov/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.mosgfs/AR.conus/VP.004-007/
Table 1: GRIB2 file names
for each experimental 2.5-km GFS-based Gridded MOS element
FILE NAME ELEMENT
ds.sky.bin Total
Sky Cover
ds.wdir.bin Wind Direction
ds.wspd.bin Wind Speed
ds.pop12.bin 12-Hour Probability of
Precipitation
ds.temp.bin 2-Meter Temperature
ds.td.bin 2-Meter Dew Point Temperature
ds.maxt.bin Daytime Maximum Temperature
ds.mint.bin Nighttime Minimum Temperature
ds.qpf06.bin 6-h
Quantitative Precipitation
Amount
ds.pts06.bin 6-h Probability of a Thunderstorm
ds.rhm.bin Relative Humidity
ds.snw24.bin 24-h Snowfall Amount
ds.pop06.bin 6-Hour Probability of
Precipitation
ds.gpf12.bin 12-h Quantitative Precipitation
Amount
ds.wgust.bin Wind Gusts
ds.pts12.bin 12-h Probability of a
Thunderstorm
ds.pts03.bin 3-h Probability of a Thunderstorm
The experimental 2.5 km products
are an addition to the gridded MOS suite, not a replacement for the current 5
km gridded MOS guidance. Customers who use the 5 km guidance over the CONUS can
continue to use these products without disruption until all customers and
systems are able to use the higher resolution guidance.
A Web page outlining the
gridded MOS guidance and the FTP server structure can be found at:
http://www.nws.noaa.gov/mdl/synop/gmos.php
For questions regarding
the experimental 2.5 km gridded MOS guidance for the CONUS please contact:
Kathryn Gilbert
MDL/Silver Spring, Maryland
301-713-0023, Ext. 130
Links to the gridded MOS
products and descriptions are at:
http://www.nws.noaa.gov/mdl/synop
NWS national TINs are
online at:
http://www.weather.gov/os/notif.htm
$$
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