Right, Jaxie, a line squall isn't visible at a distance through the warm, humid
air the precedes it. And fast moving lines often don't develop the tradition
"anvils," and when they do occur they pop up fairly quickly. When a front is
coming through, its nice to be able to visualize the "prefrontal squall line" to
know what's coming.

"JAXAshby" wrote in message
...
There are lots of places where people sail and it's difficult to see a
thunderstorm coming

bull****. Thunderstorm clouds go as high as 60,000 feet sometimes, which
means
they can be seen up to 300 nm away. Even 10,000 foot high clouds can be seen
up to 122 nm away. Can't see that coming?

And there are many places where the potential
exists every day in the summer

thunderstorms don't form inside of 30 seconds. You *KNOW* they are coming, if
one just pays attention.