The content of these web pages are for personal use and may not be re-sold or
used commercially. The graphics and data are intended to be used by
meteorologists, weather enthusiasts and aviation-related personnel.
Every attempt has been made to provide these data in as
near to real time as possible. However, there is no expressed or implied
guarantee that the information will be either accurate or timely or fit
for any particular purpose. If an obvious outage exists for a long
period, then please email us as we may not be aware that a problem exists.
However, considering the complexity and content of this site, we expect
emails to be professional and considerate;
otherwise, we will completely ignore them. If you require absolutely reliable
weather data, then you should consider commercial weather vendors since NCAR
is not an operational distributor of these data.
The raw observational data used in producing these pages are provided by
Most, if not all, of the meteorological data collection and
instrumentation is done by the
National Oceanic and Atmospheric Administration (NOAA)
National Weather Service (NWS).
Most numerical model data originate from NOAA's
National Centers for Environmental Prediction (NCEP)
in Washington D.C.