September 2010 Cet

[North-Easterly Blast]

September is a month that showed a major warming trend from around 1997 onwards. Despite the increase in overall warmth from 1988, September showed no warming trend until around 1997, indeed with a run of average to cool Septembers from 1992 to 1996; however, since then there have been numerous very warm Septembers and many have seen significant heatwaves for so late in the season; although the last three years have seen temperatures a bit closer to normal. It is also the truth that we have not had a significantly cooler than average September since 1994 (more than 0.2*C below the 1961-90 mean).

[Cymro]

13.4

[Methuselah]

Ill guess at 14.1, please...

[Nights King]

near average I think.

13.9c

[ZONE 51]

i think a solid 14.0C

[scott3108]

13.5c for me!

[SnOwFeSt]

14.1 for me please!

[Weather-history]

13.9

[BornFromTheVoid]

13.2C for me thanks...

Going by the GFS 0z, the opening 2 days of September look like averaging around the high 13s, which would be slightly below average for the beginning of the month.

[Roger J Smith]

14.8

[Optimus Prime]

Looks to me like there could be some blocking developing to the east with low pressure to the west allowing for some warm southerlies. I think the warm weather will last into the 3rd week before more unsettled and cooler conditions take over. I'll go for 15.2c.

[coram]

14.1 please

[stewfox]

Some cooler nights

13.4c

[AtlanticFlamethrower]

14C

[shuggee]

13.8ºC

[Lettucing Gutted]

Im really losing confidence in my slightly below average outcome with signs of a west based -NAO/-AO and Scandi Ridge for September. Sorry to cause trouble but I'll raise my guess to 15.5C.

Edited August 27, 2010 by Craig Evans

[Norrance]

14C for me please.

[virtualsphere]

a chilly 12.8C please.

[BornFromTheVoid]

The GFS 12z would have us in the high 15s by the 5th.

Perhaps a few (including myself) might want to reconsider their low CET guesses in the coming days!?

[Gavin P]

The GFS 12z would have us in the high 15s by the 5th.

Perhaps a few (including myself) might want to reconsider their low CET guesses in the coming days!?

Unless theres some serious changes in the next couple of days, I'll certainly be revising mine.

[Lettucing Gutted]

There are definitely signs of the Atlantic invigorating but also the high proving a bit of a pain. Very similar to the start of July 2009 with a burst of southerly winds ahead of the Atlantic busting in. Fingers crossed.

It will be interesting to see what the Atlantic lows do. If they dive Northwest-Southeast into Europe we could be on track for the coolest September since 1993 however if the Atlantic lows stall to the west in that cold pool to the west we could have a very warm September like 2005 or even 2006.

Edited August 29, 2010 by Craig Evans

[summer blizzard]

I have increased my prediction to 13.7C, bang on average.

[summer blizzard]

12.8C: Polar Gael

12.8C: Virtual Sphere

12.9C: Gavin P

13.0C: Nu Design

13.0C: Richard R

13.1C: Fozi 999

13.2C: Na Damanta Sam

13.3C: Koppite

13.3C: Croatian Weather

13.4C: Stu_London

13.4C: Adam Jones 416

13.4C: Stew Fox

13.5C: The PIT

13.5C: Scott 3108

13.6C: Stormy King

13.6C: Sufc

13.7C: Fozfoster

13.7C: Summer Blizzard

13.8C: Snowstorm 1

13.8C: Steve B

13.8C: Shuggee

13.9C: Mullender 83

13.9C: Mr Data

14.0C: Blizzards

14.0C: Nimbilus

14.0C: Atlantic Flamethrower

14.0C: Norrance

14.1C: Shaun Wales

14.1C: Pete Tattum

14.1C: PJB 120

14.1C: Coram

14.2C: Backtrack

14.3C: Paranoid

14.4C: David Snow

14.8C: Milhouse

14.8C: Roger J Smith

15.2C: Optimus Prime

15.5C: Craig Evans

[Mark Bayley]

A mild and unsettled September- 14.6c

[swfc]

Il go 15.5,with a chance of a week of very warm weather.uto