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HYSPLIT Registration Instructions

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HYSPLIT registration is ONLY required by non-NOAA employees to use the HYSPLIT dispersion model on the web with forecast meteorological data or to download the registered versions of HYSPLIT for the Linux, PC, or Mac computers. The unregistered version is identical to the registered version in all respects, except that the dispersion calculation will not work with forecast meteorological data fields. Please do not register if you will only be using the HYSPLIT trajectory model or the dispersion model with archived meteorological data.

To become a registered HYSPLIT user you must have a formal affiliation with one of the following institutions engaged in atmospheric sciences or in the provision of atmospheric operational products, and whose credentials we can verify either by a letter/email from your supervisor or by a reference to you on your employer's web site: government, commercial, educational, or non-profit. If you do not have such an affiliation, you may also register if you are sponsored by another already registered user of HYSPLIT, provided that they will be your contact point for questions about HYSPLIT and issues related to running the registered version of HYSPLIT (PC or web).

To students: If your contact information is not available on your school's English language website, please ask your professor or enrollment office to send an acknowledgment to us via email verifying your association with your school. If you are sending a copy of your enrollment certificate, mask off your personal identifiable information including but not limited to your birthdate, home address, social security number, national identification number, etc. Inclusion of personal identifiable information will delay processing your HYSPLIT user registration form.

To professionals: If your contact information is not available on your organization's English language website, please ask your supervisor or employment office to send an acknowledgment to us via email verifying your association with your organization. If your employment office is sending us a proof of your employment, be sure not to include your personal identifiable information. Inclusion of personal identifiable information will delay processing your HYSPLIT user registration form.

Do not send, along your HYSPLIT user registration form, any document containing your personal identifiable information including but not limited to your birthdate, home address, social security number, national identification number, passport number, etc. Do not email us a scan of your passport, driver's license, government-issued identification card, etc.

We encourage use of your official email address. If you send us a HYSPLIT registration form from your personal email address or if you write down your personal email address on your HYSPLIT registration form, we may need to verify your personal email address. If you wish to use a personal email address, have your supervisor or your professor send an acknowledgment to us via email verifying your personal email address.


Forgot your password? If you are registered, click on the following link to create a new password

Login still fails? Send an email to arl.webmaster@noaa.gov