ve3... wrote:
David wrote:
On Sat, 13 Jan 2007 07:22:14 -0500, dxAce
wrote:

How will this front affect the ionosphere?

It doesn't. It can cause ducting, however.
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I noticed that CBW, 990, Winnipeg, on the other side of the front at
the time, was unusually strong, leading me to wonder if weather could
be a factor in mw and sw propagation.
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I Googled around to see if weather affects mw and sw propagation and
came up with a few items. the most promising one is a paper by E.S.
Kazimirovsky and V.D. Kokourov:

"How weather Affects 160 m and MW Band Propagation"
from Geomagnetism and Aeronomy, vol 35, no3 12/95 p.305
It wasn't on line but it does indicate that people are studying the
matter.

Another article discussed the D Region 60 to 90 km high which absorbs
energy from a radio wave up to 7mhz including the MW. It considers it
as part of the atmosphere rather than the ionosphere. It is the decay
of the D Region that permits skip in the MW frequencies.
It is found in "FAQ Related to Propagation of Radio Waves" and is a
good primer on propagation.
http://www.qsl.net/vu2msy/propagation.htm