NOUS41 KWBC 261858



Service Change Notice 13-65

National Weather Service Headquarters Washington DC

200 PM EDT Fri Sep 26 2013


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:  HYSPLIT Trajectories Request Function via NWS

          Spot Forecast Request Webpages Becomes Operational

          Effective October 29, 2013


Effective Tuesday, October 29, 2013, the Hybrid Single Particle

Lagrangian Integrated Trajectory (HYSPLIT) Trajectories Request

function becomes operationally available from all NWS Weather

Forecast Offices (WFO) through their NWS Spot forecast request

webpages. This functionality has been available experimentally

from all WFO Spot webpages since September 2011:


The NOAA Air Resources Laboratory (ARL) provides the HYSPLIT

Trajectories. The trajectory elements are based on

the North American Mesoscale Model (NAM) for CONUS and the Global

Forecast System (GFS) model for Alaska and Hawaii. ARL is a

research organization and does not provide 24/7 monitoring and

support of the servers. If you do not receive HYSPLIT trajectories 

in a timely fashion via an NWS Spot webpage, contact your local

WFO to have HYSPLIT trajectories run manually.


The HYSPLIT Trajectories Request function allows partners and

users to request HYSPLIT trajectory runs at 500, 1500 and 3000

meters above ground level for the latitude/longitude of the

specified spot forecast request.  The trajectory runs begin at

the request time for wildfires and emergency responses, and at

the specified ignition time for prescribed fires.


To request HYSPLIT trajectories from WFO Spot forecast request

webpages, the authorized user must enter the phrase


"hysplit to requester email address"


in the remarks section of the spot forecast request form. Then 

substitute your email address for


"requester email address". 


The HYSPLIT trajectory raw data, as well as .gif and .kml files,

will be sent to the specified email address.


Technical information about HYSPLIT model trajectories is 

online at:


For more information regarding this service, please contact:


    Virgil Middendorf

    Information Technology Officer

    NOAA/NWS Billings Weather Forecast Office

    Billings, Montana 59102

    406-652-0851 ext 235


For more information regarding this notice, please contact:


    Robyn Heffernan

    Fire Weather Science and Dissemination Meteorologist

    NOAA/NWS Office of Climate, Water, and Weather Services

    Boise, ID 83705



National Service Change Notices are online at: