Current Weather Conditions - December 2008

Supercell · 13-12-2008 6:16pm

Mothman wrote: »

I expect in an hour or so the katabatic wind from NW will kick in and the temp will rise and then fall again even lower. It's always a rediculous tease!

-0.6C atm
Dp-2.0C

Funny you should mention katabatic effects, i've noticed the exact same thing here.
This evening is a perfect case in point, virtually no cloud, maybe one octa at most.
Yet earlier the temperature ROSE from 0.9 to 1.1°C before plummeting.
I even went outside and had a look around to see if in fact it had clouded over slightly or something, but it hadn't.
On clear nights this seems to be the way it goes..three steps back one step forward (or more) then three steps back, would love to understand the mechanics of whats happening in the atmosphere on these occasions.

Heres the temp record from my station note the rise at 16:50 followed by the plummet starting 17:00, its now 0.0°C..must be time for a rise again!!

          	  Temp    Hi     Low 
Date      Time     Out   Temp   Temp
13/12/08  16:20    1.3    1.4    1.1
13/12/08  16:30    1.0    1.1    0.9   
13/12/08  16:40    0.9    0.9    0.9 
13/12/08  16:50    1.0    1.1    0.9
13/12/08  17:00    0.8    0.9    0.6
13/12/08  17:10    0.4    0.6    0.2

Anyone care to speculate a theory for this?

Supercell · 13-12-2008 6:19pm

Now 0.2°C ..its rising again as expected..gonna plummet in 10 mins or so no doubt.

Mothman · 13-12-2008 6:27pm

-1.5C
Dp -2.6C

barnicles · 13-12-2008 6:28pm

Current conditions as of 1725

The place is white
+1 |Steady
Calm
958mb steady

Supercell · 13-12-2008 6:36pm

0.3°C, DP -1.4°C

DOCARCH · 13-12-2008 6:42pm

DOCARCH wrote: »

+2.5c DP +1.0c Has clouded over again.

Same

LEIN · 13-12-2008 6:50pm

Clear and very cold. Frost on cars already.

Supercell · 13-12-2008 6:50pm

Light breeze just started up, MM I reckon your temps are going to start fluctuating wildly shortly.

Snowbie · 13-12-2008 7:08pm

Supercell wrote: »
Funny you should mention katabatic effects, i've noticed the exact same thing here.
This evening is a perfect case in point, virtually no cloud, maybe one octa at most.
Yet earlier the temperature ROSE from 0.9 to 1.1°C before plummeting.
I even went outside and had a look around to see if in fact it had clouded over slightly or something, but it hadn't.
On clear nights this seems to be the way it goes..three steps back one step forward (or more) then three steps back, would love to understand the mechanics of whats happening in the atmosphere on these occasions.

Heres the temp record from my station note the rise at 16:50 followed by the plummet starting 17:00, its now 0.0°C..must be time for a rise again!!
                Temp    Hi     Low 
Date      Time     Out   Temp   Temp
13/12/08  16:20    1.3    1.4    1.1
13/12/08  16:30    1.0    1.1    0.9   
13/12/08  16:40    0.9    0.9    0.9 
13/12/08  16:50    1.0    1.1    0.9
13/12/08  17:00    0.8    0.9    0.6
13/12/08  17:10    0.4    0.6    0.2
Anyone care to speculate a theory for this?

I think i did recently on a NW breeze running down off the mountains, do a search.:)
I take keen interest in MM and your location but the effects on temp at MM location is very interesting. It can be a couple of C in minutes up and down when the katabatic wind blows the cold air out, relaxes and the cold air sinks back around there. I only notice this happening at both your locations in a NW wind though. Excellent viewing the extremes in mins.:)

2.3C Up and down slightly but cloud is coming and going. Roads are wet so i'd imagine a slight subzero temp and ice to be in order. Long night ahead for the ice to build up.

barnicles · 13-12-2008 7:17pm

Whats DP?

barnicles · 13-12-2008 7:26pm

Current conditions as of 1820

Snowy icy frosty cold
+0.5|FALLING
Calm
960 mb steady

DOCARCH · 13-12-2008 7:50pm

barnicles wrote: »

Whats DP?

It's dew point - this is the temperature to which the air must be cooled for water vapor to condense into water.

2.8c here now. DP +1.5c Still full cloud cover.

Mothman · 13-12-2008 8:00pm

-2.2c
Dp-3.0c
Little breeze yet just the odd flutter.

Very crispy out and no cloud.
Venus setting shortly and the full looking moon is starting to brighten the winter wonderland.

Grass temp is -8C atm

LEIN · 13-12-2008 8:15pm

Frost getting fairly sharp already.

Mothman · 13-12-2008 8:58pm

-2.6C
Dp-3.2C

No katabatic because there's no cold air to come down from the hills!

Annamoe - bandit country

up in the hills a few miles to my west +0.9C

Snowbie · 13-12-2008 9:12pm

Cloudy
2.6C
Wind WNW

Supercell · 13-12-2008 9:23pm

Mothman wrote: »

-2.6C
Dp-3.2C

No katabatic because there's no cold air to come down from the hills!

Annamoe - bandit country up in the hills a few miles to my west +0.9C

Could fry an egg on the ground here!!

Mothman · 13-12-2008 9:27pm

Malin Head 5.5mm past hour with heavy sleet, snow reported previous hour.

Meanwhile much closer to home, -2.8C

rhonin · 13-12-2008 9:53pm

Clear skies now. Some cloud approaching from the SW. 1.8C

Snowbie · 13-12-2008 10:06pm

2.8C

nacho libre · 13-12-2008 10:11pm

Snowbie wrote: »

2.8C

sorry snowbie. i'm sure your patience will be rewarded sooner rather than later.

Snowbie · 13-12-2008 10:34pm

Nice one nachos, am enjoying this cold weather fullstop. It's nice to get a break from the norm, norm being recent winters, thats rewarding in itself. If it snows here, well excellent but surely myself an WC can't go this entire winter without snow in our part of the world again. It must happen, it has to happen, it will happen, will it happen???

LEIN · 13-12-2008 11:00pm

Frost getting sever now but that cloud that's hanging over Dublin for the past few hours is starting to move in my direction.

Wouldn't mind if there was any precip in it but its going to kill my frost. :mad:

nacho libre · 13-12-2008 11:03pm

Snowbie wrote: »

Nice one nachos, am enjoying this cold weather fullstop. It's nice to get a break from the norm, norm being recent winters, thats rewarding in itself. If it snows here, well excellent but surely myself an WC can't go this entire winter without snow in our part of the world again. It must happen, it has to happen, it will happen, will it happen???

did you see the forecast at 9:30 pm. Evelyn was saying it's inclement weather, (i beg to differ:pac:), but more importantly she said the showers could turn up anywhere tonight. On the map it even showed a shower on the east coast. so who knows?
you're are dead right though this winter so far is a pleasant change from all the mild muck we usually get. if this cold pattern continues it's surely only a matter of time before you get some snow out of it. perhaps it would be a good idea if your friend weathercheck were to leave the country more often;)

ch750536 · 13-12-2008 11:04pm

Just in case you eastcoasters were busy watching the X Factor.

LEIN · 13-12-2008 11:06pm

Nice one ch750536 rub it in why dont you!

Mothman · 13-12-2008 11:07pm

Malin Head another 5.5mm at 21z, I don't believe the precipitation amount is correct for either hour.

A light breeze at 10m has been ongoing for past 30 minutes, but it took a while to impact the 1.2m temperature. It has now and the temperature has risen from -3.3C to -1.6C.

Grass temp has risen from -9C to -6C. Some cloud to my east may be moving in slowly.

Danno · 13-12-2008 11:07pm

Anyone watching Sat24.com - there appears to be showers building over land now...

http://sat24.com/Region.aspx?country=gb&sat=ir&type=loop

ch750536 · 13-12-2008 11:08pm

Damo9090 wrote: »

Nice one ch750536 rub it in why dont you!

Rare I get chance to rub in snow.

Loveley cool snow.

Tasty, chilly snow.

Hmm, snow.

err , Back in a mo guys...

nacho libre · 13-12-2008 11:21pm

started up again- but it's now sleet. the temperature has risen and all- it's now up to 1.4. the snow is melting.

hopefully, as the shower gets heavier it'll turn back to snow!

Current Weather Conditions - December 2008

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