Telamon wrote:

In article .com,
wrote:

Last night on the AM broadcast band, the stations up and down the East
Coast that traditionally boom in were not so strong.

The Canadian station on 740 which is usually all there is had some
obvious competition from stations in the SW... Texas/Oklahoma? Also the
stations from upstate New York which normally boom in had other signals
fading in and out against them.

And WGN which is not all that reliably received here in Washington DC
was booming in real strong.

Is this possibly related to the strong weather that has been moving
through the midwest (and is due to hit here on the E Coast tonight)? Or
is it just a sign of the end of Winter MW propogation?

Nothing obvious in the solar data to explain it.

Maybe the whether makes changes in ground conductivity that results in
the reception change.

Do weather changes affect the ionosphere in the lower layers that are
responsible for night time propagation?

I rather doubt it as the D layer (lowest of the ionosphere) begins about 30
miles up.

dxAce
Michigan
USA

In article ,
dxAce wrote:

Telamon wrote:
Do weather changes affect the ionosphere in the lower layers that are
responsible for night time propagation?

I rather doubt it as the D layer (lowest of the ionosphere) begins about 30
miles up.

But there's been some recent discoveries that strong lighting strikes
have an upwards effect that goes about that high. (Buzzword: Sprites.)
And, I gather, there was a whole lot of lightning in that storm.

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

In article ,
(Mark Zenier) wrote:

In article ,
dxAce wrote:

Telamon wrote:
Do weather changes affect the ionosphere in the lower layers that are
responsible for night time propagation?

I rather doubt it as the D layer (lowest of the ionosphere) begins about 30
miles up.

But there's been some recent discoveries that strong lighting strikes
have an upwards effect that goes about that high. (Buzzword: Sprites.)
And, I gather, there was a whole lot of lightning in that storm.

Apparently there is a connection between thunderheads and the
ionosphere. There are the "Sprites" and other types of flashes seen from
the tops of storm cloud formations.

--
Telamon
Ventura, California