If you are creating a password for the first time, you should have received a confirmation via email that your application was accepted from us before proceeding. The next step is to assign a username and password for your HYSPLIT account. Fill in the required information below and click the submit button. The email address you provided to us is your account name and is CASE SENSITIVE. If your email address changes and we are not notified in advance (arl.webmaster@noaa.gov), you will be dropped from the registered list of users and will need to re-register to gain access to HYSPLIT.

If you forgot your password or want to change it, fill in the required information below and click the submit button. The email address you provided to us when you registered must match the email address you enter here and is CASE SENSITIVE. An addition layer of security requires you to enter your HYSPLIT account number that was provided in the email confirmation you received when you initially registered. If you do not know your account number, send an email to arl.webmaster@noaa.gov requesting your account number.