Changes to threats web pages and ftp server

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: Changes to threats web pages and ftp server
• From: Geoff DiMego <gdimego@xxxxxxxxxxxxx>
• Date: Monday, May 07, 2001 3:50 PM -0400

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Folks:
Here is a memo from Eric Rogers announcing the switch
to the nested Meso Eta threats runs being run in test
mode on the PROD side of the computer.

Starting at 12Z 5/7 the Eta threats runs which have been displayed on
the web (http://www.emc.ncep.noaa.gov/mmb/mmbpll/nestpage/) and placed
on the NCEP ftp server will switch to using the "production" parallel
threats runs. These runs are using the schedule agreed upon by the NWS
regions:

00Z : 12-km Alaska, 10-km Hawaii
Found at ftp://ftp.ncep.noaa.gov/pub/emc/Alaska12.t00z/,
ftp://ftp.ncep.noaa.gov/pub/emc/hi10.t00z/

06Z : 10-km western US, 10-km Puerto Rico
Found at ftp://ftp.ncep.noaa.gov/pub/emc/West10.t06z/,
ftp://ftp.ncep.noaa.gov/pub/emc/pr10.t06z/

12Z : 10-km central U.S., 10-km Hawaii
Found at ftp://ftp.ncep.noaa.gov/pub/emc/Central10.t12z/,
ftp://ftp.ncep.noaa.gov/pub/emc/hi10.t12z/

18Z : 10 km eastern U.S, 10-km Puerto Rico
Found at ftp://ftp.ncep.noaa.gov/pub/emc/East10.t18z/,
ftp://ftp.ncep.noaa.gov/pub/emc/pr10.t18z/

Differences between these runs and the parallel runs:

1) The EMC parallel threats runs all had 12-h precipitation buckets, so
displays of intermediate forecast hours were a running total (e.g.,
6-h,18-h,30-h, 42-h forecasts showed 6-h accumulations, 9-h, 21-h, 33-h,
45-h showed 9-h accumulations). The production runs of the Eta threats
all have 3-h precipitation buckets, so the web displays will now show
3-h accumulations, 0-48 h accumulations, and 24-h accumulations valid at
00Z and 12Z.

2) GRIB files: Output of grid #218 (called AWIP10, the10 km CONUS AWIPS
grid) for the three CONUS threats runs has been replaced by output from
regional AWIPS grids which are approximately the same size as the domain
of these nests. They are:

grid #245 : Eastern US grid
grid #246 : Western US grid
grid #247 : Central US grid

All of the above grids will be called AWIP10ff.tm00, ff=00,03,06,...48

Grid #242 for the Alaskan threats run has been replaced by a smaller
polar stereogrphic grid which covers only the area of the 12-km Alaska
domain. It is called grid #249
Attached is a Wordperfect document with the details on these 4 new
grids.

There are no changes to output grids from the Hawaii or Puerto Rico
threats runs, or to any of the BUFR soundings.
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