Evo
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Posts posted by Evo
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Hey Beth
At the top of this section (Help, support and feedback) there is a guide on how to post pictures.
Basically, at the bottom of the post page, there is a "File Attachments" section. Click browse, browse and select the file, click Add Attachment, then "Add into post".
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I've often wondered about the magnitude of work that goes into producing a fax chart from the raw model output.
One day it would be really nice if I had sufficient understanding, software and time to be able to do that from the GFS output
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It's disturbing, isn't it, to hear about drivers who can spot the tiniest splurge of sleet on the windscreen, when they are supposed to be concentrating on the road. The eyes should be focused onto the road (or way) ahead and not onto the windscreen! just looking through my 'local' websites, now is it me or are the orkney islands going to miss this little cold spell? do they know something we don't ? ...
I'm guessing they haven't seen this:
Brrrrrrr
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I agree Ian. I posted somewhere earlier that it looked to me that because the UKMO weren't sure of the specifics of the LPs position, they just looked up in the stats book which areas are most often affected by a northerly. The chart also looks more like a snow chance chart than a chance of disruption chart!
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I'll stick my neck out here and have a go. Warning: the information contained within may be total bullplop.
A bit of background. The Polar Front Jet or PFJ circulates the globe from West to East. During the summer it moves North and during the winter it sinks South. If the jet circulates in a very flat pattern with little north and southwards variation it is said to be zonal. When the jet is zonal, the weather of countries near the jet will be dominated by westerly winds. In our case, this means generally mild and wet weather coming in off the Atlantic. Places north of the PFJ will be in cold air and placed South of the PFJ will be mild. If the jet is zonal, it will generally be to the North of us, leaving us with mild, wet weather.
The jet is never perfectly flat though and it will have kinks in it which are called long waves (long waves are also called Rossby Waves). If these waves amplify sufficiently you enter a meridional flow where cold air flows south from the Arctic and warm air flows north. This happens side by side with Southerly winds pushing the warm air North and Northerly winds flooding cold air South.
I think what Steve was referring to with a 4 wave pattern is that there are four Rossby waves in the PFJ, which produces a stable jet flow - potentially for quite a while, and this implies that our current synoptics stay locked in because the jet doesn't flatten and break through the Mid-Atlantic block.
That's my understanding anyway, I'm sure someone more knowlegable can correct me if it's all wrong!
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If nobody else will make use of this area I will B)
How about this for a scattered ensemble?
The green member crashes through the x axis at the end!
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What you are looking for is forensic meteorology.
Try here
or Google that term.
You can also try WeatherOnline. Click on "History"
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Just had a 5 minute, very wet, snow shower
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A bit late, I've been away because of the Rallye Sunseeker but there was snow overnight (Fri-Sat) which left a dusting this morning
(7 am)Also 2 snow showers this morning, didn't settle. Snow had all melted by 9am I would guestimate.
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A moderately heavy snow shower here now, it's been snowing for about an hour so far. Still no sign of anything settling though.
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Rather bizarre precipitation for the last 15 minutes. I'm not sure how you would classify it as there's clearly rain, hail and snow all mixed in together and at the same time
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Firstly the weather observed at Bournemouth Airport
One snow shower between 9 and 10 this morning
From two o'clock until now, light sleet
In central Bournemouth, however, no sleet that I have seen, light drizzle all day.
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We've had two light showers earlier (pics in the pics thread). Now in a heavier and longer shower - it's been going at various intensities for about 15 minutes now. Still too warm to settle.
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We've had 3 or 4 very light snow showers here today. Nothing has settled, not even enough snow to be visible on the ground.
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EVo-
FI refers to ' Fantasy Island-' The often referred to part of the charts between the hours of T180- T384- always over the rainbow...... and far far away-
S
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Ahhhh, excellent, thank you!
(By the way I though it meant Far Intervals, so I'm glad I didn't say what I thought it meant.... Oh dang it I just did
)I guess this all needs to be collated as suggested by scandhi and put in the Net Weather Guides (not wishing to lecture Granny about the eggs!)
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thank god at last, I was beginning to get very confused and starting to make things up just to sound good when my OH, asks me what so and so means.
quick thinking I thought on my behalf
GFS- Global forecasting sytem my god I got it right
can't be that stupid then Many thanks
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Glad it's not just me. Sometimes I actually know what it stands for but my brain insist on using the "wrong" wording when I read the intial.
What about FI? I cannot search the forum because of the tem length limit. I know what it means (I think) but not what it stands for?
Thursday 23rd Of February 2006
in Weather reports
Posted
Continuous fine snow in Bournemouth now. Quite heavy really given the size of the grains.
020/8knts T2, D -2, Overcast at 4,500ft