Boards.ie uses cookies. By continuing to browse this site you are agreeing to our use of cookies. Click here to find out more x
Post Reply  
 
 
Thread Tools Search this Thread
26-01-2019, 12:21   #46
Kermit.de.frog
Registered User
 
Kermit.de.frog's Avatar
 
Join Date: Apr 2014
Posts: 7,999
Just to divert for a brief moment there could be some wintry showers and a few flakes overnight. Maybe a surprise dusting for some in the morning?









Ninja snow is best snow

Last edited by Kermit.de.frog; 26-01-2019 at 12:41.
Kermit.de.frog is online now  
Advertisement
26-01-2019, 12:29   #47
Strawberry Milkshake
Registered User
 
Join Date: Jan 2013
Posts: 5,746
“Ninja snow is best snow


Strawberry Milkshake is offline  
Thanks from:
26-01-2019, 12:57   #48
sdanseo
Registered User
 
Join Date: Aug 2005
Posts: 7,880
Just figured out how to generate the soundings on Meteociel.

Can anyone explain the two large inversions in temperature near the surface, and what they mean please?

sdanseo is offline  
26-01-2019, 13:01   #49
Gaoth Laidir
Registered User
 
Gaoth Laidir's Avatar
 
Join Date: Dec 2015
Posts: 3,418
Quote:
Originally Posted by sdanseo View Post
Just figured out how to generate the soundings on Meteociel.

Can anyone explain the two large inversions in temperature near the surface, and what they mean please?

Your coordinates were switched around. I've plotted them correctly now (I assume you were looking at Ireland) and here it is. The ARPEGE has much lower resolution far away from France (your coordinates were south of the Equator, in the Indian Ocean).


Last edited by Gaoth Laidir; 26-01-2019 at 13:05.
Gaoth Laidir is offline  
26-01-2019, 13:14   #50
sdanseo
Registered User
 
Join Date: Aug 2005
Posts: 7,880
D'oh, thanks. In my defence Latitude and Longitude are normally presented the correct order.

Not very reassuring for any white stuff based on the above.
sdanseo is offline  
Advertisement
26-01-2019, 13:28   #51
Gaoth Laidir
Registered User
 
Gaoth Laidir's Avatar
 
Join Date: Dec 2015
Posts: 3,418
Just to show how the cold GFS bias in a northerly, here it is alongside the ICON (850 hPa temp and geopotential).

Note how much further south the -5 and especially the -10 °C isotherms are advected with the GFS compared to the ICON. This is the classic cold bias and the reason why a couple of degrees should be added to reflect reality.

GFS left, ICON right.

MONDAY 00Z. Not much difference.


TUESDAY 00Z


TUESDAY 12Z

Attached Images
File Type: png GFS ICON 42.PNG (137.7 KB, 1699 views)
File Type: png GFS ICON 66.PNG (134.7 KB, 1697 views)
File Type: png GFS ICON 78.PNG (135.5 KB, 1689 views)
Gaoth Laidir is offline  
26-01-2019, 13:28   #52
Gaoth Laidir
Registered User
 
Gaoth Laidir's Avatar
 
Join Date: Dec 2015
Posts: 3,418
Quote:
Originally Posted by sdanseo View Post
D'oh, thanks. In my defence Latitude and Longitude are normally presented the correct order.

Not very reassuring for any white stuff based on the above.
I know, I made the same mistake myself at first.
Gaoth Laidir is offline  
(3) thanks from:
26-01-2019, 14:09   #53
Gonzo
Moderator
 
Gonzo's Avatar
 
Join Date: Aug 1999
Posts: 9,581
Send a message via MSN to Gonzo
might be a chance of sleet or snow in some midland and northern areas later tonight.



Tomorrow looks mostly dry in Leinster, then some rain on Monday. Best chance of seeing snowflakes in the east looks to be Tuesday evening. Looks very marginal again after Tuesday.

Gonzo is offline  
(2) thanks from:
26-01-2019, 14:22   #54
Gaoth Laidir
Registered User
 
Gaoth Laidir's Avatar
 
Join Date: Dec 2015
Posts: 3,418
Quote:
Originally Posted by Gonzo View Post
might be a chance of sleet or snow in some midland and northern areas later tonight.


Even the GFS sounding only shows snow above around 300 metres tonight, so I'm not sure exactly how those charts are generated.
Gaoth Laidir is offline  
Advertisement
26-01-2019, 14:41   #55
munsterlegend
Registered User
 
Join Date: Jun 2008
Posts: 4,195
Quote:
Originally Posted by Gaoth Laidir View Post
Even the GFS sounding only shows snow above around 300 metres tonight, so I'm not sure exactly how those charts are generated.
It wouldn’t be ninja snow if we knew it was coming!!!
munsterlegend is offline  
(3) thanks from:
26-01-2019, 14:49   #56
highdef
Registered User
 
Join Date: Oct 2003
Posts: 3,380
Quote:
Originally Posted by Gaoth Laidir View Post
Even the GFS sounding only shows snow above around 300 metres tonight, so I'm not sure exactly how those charts are generated.
Does the sounding relate to whether snow is falling @ 300m or whether it is settling? I'm guessing the former but hoping you could clarify.
highdef is offline  
26-01-2019, 15:00   #57
Gaoth Laidir
Registered User
 
Gaoth Laidir's Avatar
 
Join Date: Dec 2015
Posts: 3,418
Quote:
Originally Posted by highdef View Post
Does the sounding relate to whether snow is falling @ 300m or whether it is settling? I'm guessing the former but hoping you could clarify.
Falling. The sounding for pretty uch your area shows more sleety slop.
Gaoth Laidir is offline  
Thanks from:
26-01-2019, 15:13   #58
JanuarySnowstor
Registered User
 
Join Date: Feb 2008
Posts: 1,716
Good start to the early evening with the 12z icon keeping the low on Monday night further North. Chances of a spell of more prolonged sleet/snow across the very South. Then early Wednesday another disturbance going through the country bringing possibly heavy snow!!
JanuarySnowstor is offline  
26-01-2019, 16:04   #59
torres9kop
Registered User
 
Join Date: Nov 2010
Posts: 263
Will it snow in the Dublin 4 area on Tuesday does anyone know?
torres9kop is offline  
(3) thanks from:
26-01-2019, 16:07   #60
Gonzo
Moderator
 
Gonzo's Avatar
 
Join Date: Aug 1999
Posts: 9,581
Send a message via MSN to Gonzo
The GFS-P is showing widespread heavy snow for Tuesday from south Dublin to Limerick and southwards. The track of this low pressure will be crucial and could change quite a bit. If this tracks further north, rain would be more likely across the south, if it tracks further south, many places staying dry, until sleet and snow showers later in the day.



The GFS-P also showing plenty of snow across the country on Wednesday and more on Thursday and Friday. Perhaps the GFS-P is totally going overboard on the snow potential for Ireland over the next 6 days. Thursday and Friday is also very far away in terms of what could happen, so not much point spending too much time on those days just yet.

The operational GFS has Ireland missing out on that low pressure system on Tuesday with rain passing to our south. and wintry showers across the country later in the day.

As for Thursday/Friday the GFS has a marginal mix of rain and sleet across the country with hill snow.

If the GFS-P proves correct (which I think is unlikely), then there is a chance for disruptive snow in parts of Ireland from Tuesday onwards.

Last edited by Gonzo; 26-01-2019 at 16:10.
Gonzo is offline  
Post Reply

Quick Reply
Message:
Remove Text Formatting
Bold
Italic
Underline

Insert Image
Wrap [QUOTE] tags around selected text
 
Decrease Size
Increase Size
Please sign up or log in to join the discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search



Share Tweet