My word, by next Saturday the GFS DT12Z is forecasting a 200+knot westerly
jet along circa 55N extending across the Atlantic and pointing straight at
UK. If this comes off, and it has been predicted by ECMWF too then we are in
for some very lively weather next weekend and beyond. Lot of very cold air
(sub 492 DAM) over Arctic Canada to become entrained too. Watch out Scotland
especially :-)

Will
--

On Sat, 10 Jan 2009 16:46:18 -0000, "Will Hand"
wrote:

My word, by next Saturday the GFS DT12Z is forecasting a 200+knot westerly
jet along circa 55N extending across the Atlantic and pointing straight at
UK. If this comes off, and it has been predicted by ECMWF too then we are in
for some very lively weather next weekend and beyond. Lot of very cold air
(sub 492 DAM) over Arctic Canada to become entrained too. Watch out Scotland
especially :-)

Will, does that mean some beefy depressions bombing over. I am going
caving and a slight choice of routes(and caves) but,however,decisions
are not made until we are up there. I have to wallow around in a
streamway so am expecting bloody cold water but the standard cave temp
does not alter. Thermals + furry suit + outer + balaclavas.

Mendips have a quick run off so hence the query about activity

R

Robin Nicholson wrote:
On Sat, 10 Jan 2009 16:46:18 -0000, "Will Hand"
wrote:

My word, by next Saturday the GFS DT12Z is forecasting a 200+knot
westerly jet along circa 55N extending across the Atlantic and
pointing straight at UK. If this comes off, and it has been
predicted by ECMWF too then we are in for some very lively weather
next weekend and beyond. Lot of very cold air (sub 492 DAM) over
Arctic Canada to become entrained too. Watch out Scotland especially
:-)

Will, does that mean some beefy depressions bombing over. I am going
caving and a slight choice of routes(and caves) but,however,decisions
are not made until we are up there. I have to wallow around in a
streamway so am expecting bloody cold water but the standard cave temp
does not alter. Thermals + furry suit + outer + balaclavas.

Mendips have a quick run off so hence the query about activity

R

Yes it means *potentially* stormy, especially in the west and north.

Will
--

Will Hand wrote:
My word, by next Saturday the GFS DT12Z is forecasting a 200+knot
westerly jet along circa 55N extending across the Atlantic and
pointing straight at UK. If this comes off, and it has been predicted
by ECMWF too then we are in for some very lively weather next weekend
and beyond. Lot of very cold air (sub 492 DAM) over Arctic Canada to
become entrained too. Watch out Scotland especially :-)

Will

12Z ECMWF looks just as fearsome with storms and deep cold polar maritime
air set to sweep into Britain next Sunday (18th). Very strong flow at 500
hPa implying a powerful jet aloft. Flow finally sweeping away the remaining
vestiges of the block over Europe which looks like bravely hanging on for a
while next week.

Will
--

Will Hand wrote:
Will Hand wrote:
My word, by next Saturday the GFS DT12Z is forecasting a 200+knot
westerly jet along circa 55N extending across the Atlantic and
pointing straight at UK. If this comes off, and it has been predicted
by ECMWF too then we are in for some very lively weather next weekend
and beyond. Lot of very cold air (sub 492 DAM) over Arctic Canada to
become entrained too. Watch out Scotland especially :-)

Will

12Z ECMWF looks just as fearsome with storms and deep cold polar
maritime air set to sweep into Britain next Sunday (18th). Very
strong flow at 500 hPa implying a powerful jet aloft. Flow finally
sweeping away the remaining vestiges of the block over Europe which
looks like bravely hanging on for a while next week.

Will

00Z Sunday GFS shows jet slamming into SW Ireland by 06Z Sunday with left
exit (strong development zone) over Irish Sea. Jet then sinks south and
weakens slowly.
Next week is going to be *very* interesting.
*Potentially* we could have:
Storms and inland gales causing widespread damage anywhere in UK
Widespread blizzards over Scotland.

Just a heads up, the detail will change :-)

Will
--

On Jan 11, 8:41*am, "Will Hand" wrote:
Will Hand wrote:
Will Hand wrote:
My word, by next Saturday the GFS DT12Z is forecasting a 200+knot
westerly jet along circa 55N extending across the Atlantic and
pointing straight at UK. If this comes off, and it has been predicted
by ECMWF too then we are in for some very lively weather next weekend
and beyond. Lot of very cold air (sub 492 DAM) over Arctic Canada to
become entrained too. Watch out Scotland especially :-)

Will

12Z ECMWF looks just as fearsome with storms and deep cold polar
maritime air set to sweep into Britain next Sunday (18th). Very
strong flow at 500 hPa implying a powerful jet aloft. Flow finally
sweeping away the remaining vestiges of the block over Europe which
looks like bravely hanging on for a while next week.

Will

00Z Sunday GFS shows jet slamming into SW Ireland by 06Z Sunday with left
exit (strong development zone) over Irish Sea. Jet then sinks south and
weakens slowly.
Next week is going to be *very* interesting.
*Potentially* we could have:
Storms and inland gales causing widespread damage anywhere in UK
Widespread blizzards over Scotland.

Just a heads up, the detail will change :-)

Will
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An I assume it is looking good for snow in the Alps, say 25th Jan,
French Alps at 1850m? ;-)