On Fri, 26 Sep 2003 19:26:50 GMT, Les Crossan in
wrote:

I always thought hurricane-force winds could come from extratropical
cyclones or mid-latitude depressions too?? Has the thinking changed on this
recently.... please correct me if I'm wrong..

No - you are quite correct, Les. Luckily it is quite rare, but I do get
worried when I hear of F12 (hurricane force) being forecast for Rockall,
Malin and Hebrides - all close to here. Wind is the one element that gets
me edgy.

snip


The USW FAQ has a distinction in 2B.1 too between tropical cyclones and deep
depressions. I'm confused now. HELP!

I haven't checked in the FAQ but would suggest a "deep depression" is a
deep "Low" - "Deep Extratropical Cyclone" - different names for the same
feature in mid latitudes.

The tropical cyclone (hurricane) may well become a deep depression after
moving into higher latitudes, but may retain its hurricane status well
beyond where conditions are ideal for its formation. As Norman mentioned,
"Fabian" was still a hurricane north of 45 degrees even though it could not
have formed there.

--
Mike posted to uk.sci.weather 26/09/2003 19:57:49 UTC
Coleraine
Seeking information about the Internet and the way it works? - Subscribe to
news:uk.net.beginners