This message, posted on 02/24/2009, serves as a notice that we will be restricting access to the OnDemand Severe Weather Verification System (http://ondemand.nssl.noaa.gov) beginning on a transition date of March 31, 2009. Since this experimental site is intended only for non-commercial use, we will be restricting usage of this site to non-commercial users starting on the transition date. Users originating from any .gov, .edu, or .mil domain will have unrestricted access to the system. Users originating from any other domain will be required to register for access, using the registration form: [User Registration], and will be subject to approval by the system administrators.
[05/02/2011] There has been a great increase in user requests to the NSSL OnDemand User Interface as a result of the 27 April 2011 Tornado Outbreak in the Southeastern US. While we are restricted from offering access to non research or government users, we can provide the Google Earth(tm) KMZ file that has been circulated by NOAA.
The Google Earth KMZ file for the NSSL RotationTracks can be downloaded by clicking
These two KMZ files span from 16 UTC on 27 April until 9 UTC on 28 April, 2011.
The images are created using the NSSL WDSSII Multi-Radar/Multi-Sensor system. Please see the website http://wdssii.nssl.noaa.gov/ for more information about how these and other products are made. Also note that while we restrict access to the NSSL OnDemnd archive system, realtime Google Earth(tm) KMZ files are freely available for these and other products by going to http://wdssii.nssl.noaa.gov/?r=products.
[03/20/2011] NOTICE: We are testing a new interface for the OnDemand system. This new interface is based on Open Layers and eliminates the older Java Applet requirement that the existing interface uses. If you are interested in testing out this potenial replecement of this current interface, please submit your requests via