Search found 306 matches

by barbara.stunder
June 24th, 2019, 8:47 am
Forum: Trajectory Model
Topic: MET File to use
Replies: 1
Views: 10

Re: MET File to use

by barbara.stunder
June 24th, 2019, 8:45 am
Forum: Trajectory Model
Topic: MET File to use in running Trajectory
Replies: 1
Views: 10

Re: MET File to use in running Trajectory

Please see the Tutorial about trajectories and dispersion. https://ready.arl.noaa.gov/HYSPLIT_Tutorials.php. No single trajectory perfectly represents actual air motion, hence ensembles are preferable to single trajectories. Even though you are only interested in smoke 6 feet off the ground, what st...
by barbara.stunder
June 14th, 2019, 2:39 pm
Forum: Announce
Topic: June 2019 HYSPLIT upgrade at NCEP
Replies: 6
Views: 161

Re: June 2019 HYSPLIT upgrade at NCEP

We found bugs in the HYSPLIT-compatible GFS files related to precipitation. HYSPLIT should not be run with wet deposition until this is resolved. hysplit.tCCz.gfs0p25f - The precipitation in the file is labeled TPPA (total accumulation) but the data are really TPP6 (up to 6-h accumulation). READY me...
by barbara.stunder
June 7th, 2019, 12:55 pm
Forum: Announce
Topic: June 2019 HYSPLIT upgrade at NCEP
Replies: 6
Views: 161

June 2019 HYSPLIT upgrade at NCEP

HYSPLIT will upgrade to NCEP's HYSPLIT version number 7.6 on or about the 12z cycle on June 12, 2019. See the Service Change Notice (SCN) for details (https://www.weather.gov/media/notification/scn19-38hysplit_upgrade.pdf). All GFS and GDAS HSYPLIT files will then be from the upgraded NCEP GFS (with...
by barbara.stunder
May 31st, 2019, 7:19 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: cluster analysis
Replies: 3
Views: 92

Re: cluster analysis

There is not enough computer memory to handle that many trajectories. To use this software you need to scale your set of trajectories down. Please see viewtopic.php?t=14
by barbara.stunder
May 20th, 2019, 8:38 am
Forum: Dispersion Model
Topic: Dry Deposition
Replies: 2
Views: 285

Re: Dry Deposition

Please see the help file c:\hysplit4\html\S314.htm

You can get to this from the GUI - Concentration - Setup Run - Pollutant, Deposition and Grids setup - Specie 1 under Deposition, Help
by barbara.stunder
May 6th, 2019, 3:19 pm
Forum: Users
Topic: Trajectory > Display > Frequency > Create File of Trajectory Filenames Not Outputting New .bin File
Replies: 1
Views: 340

Re: Trajectory > Display > Frequency > Create File of Trajectory Filenames Not Outputting New .bin File

The "Create file of trajectory filenames" creates a text file. The "Execute Display" creates the binary file. This is explained in section 6.1 of the (basic) Tutorial at https://www.ready.noaa.gov/HYSPLIT_Tutorials.php
by barbara.stunder
May 6th, 2019, 3:11 pm
Forum: Conversion programs
Topic: Error while using grib2arl
Replies: 4
Views: 631

Re: Error while using grib2arl

I am not familiar with the data at rda.ucar.edu. NCEP used to produce grib1 format data, but now produces grib2.
by barbara.stunder
April 29th, 2019, 1:42 pm
Forum: Conversion programs
Topic: Error while using grib2arl
Replies: 4
Views: 631

Re: Error while using grib2arl

The error message is implying the data are not grib1. Please confirm.