BLIPMAPs predict thermal soaring conditions resulting from surface
heating of the Boundary Layer, by post-processing numerical weather
model predictions to provide parameters suited to the needs of soaring
pilots. Users of this viewer are assumed to be familiar with
BLIPMAP and its parameters, as described on the NW 21Z BLIPMAP webpage and on the parameter
BASIC thermal forecast parameters
gives a short list of the parameters most important for thermal soaring.
(Latest 5 news items)
October 29, 2020: November 2 DDoS Attack ?
I received an ransomware demand email stating that this site will be
subjected to a DDoS attack starting on November 2 if I do not pay
a "ransom" of $1150. I have no intention of paying such since this site is of no financial value to me.
I suspect the extortion warning to be a bogus, but should you
experience difficult accessing the site after that date, such is likely
the reason. (Nov.5 update: The email was indeed a simple scam. More info)
July 20, 2020: NEW SERVER:
You are now using the new virtual Blipmap server. The RAP and NAM BLIPMAP forecasts are working, as is the forum - but I have checked little else. If you find something not working, please report it on the Blipmap Forum. and I will attempt to fix it.
All BLIPMAPs are now freely available to registered users.
Registration (free) is needed for direct (no-nag-screen)
New users can
Currently registered users can
Logon (get new cookie) here
view registration (cookie) status here.
More info is available at the
Registration Information webpage.
EMAIL POLICY: There are
many advantages to having one person's knowledge be shared and
available to others, so I expect most BLIPMAP issues to be handled through
and ask those who have a question or problem or experience which could
be of interest to others to post it there. This allows others to
comment on the matter if they have any personal experience and also
allows any response I make to be read by others. If you send me
an email, I will respond personally only if it's nature is not
appropriate for such posting - in other cases I will simply
reply with a request to post to the forum. FEEDBACK REQUEST:
I only look at the webpages and maps that I use personally or that I
suspect might contain an error. If you notice a consistent
problem with either, please post a message on the
Thanks to John Whitney (F9) for slaying the file-eating
dragon inhabiting the original viewer and adding the "ListSAVE/LOAD"
I also want to personally thank those whose support is listed on the