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03-04-2020, 19:58   #1
Gonzo
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FI Charts ( T120+ onwards) Spring 2020 **READ MOD NOTE IN FIRST POST**

Mod Note

This thread is for posting/discussing/analyzing FI CHARTS ONLY i.e. Charts in the unreliable time frame, generally +T120 onward.

If your post does not specifically relate to an FI chart then it doesn't belong here - Off topic posts will be moved

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today's GFS run ends with some nice high pressure and relatively warm air over us. After a possibly unsettled and cool spell around Easter, things are looking good as we head towards the middle of April.

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11-04-2020, 12:29   #2
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The weather looks quite and fairly settled out to +240. Hp near by and cols more evident than Lp. Should be reasonable to good spring like weather. Mild looking in general.







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15-04-2020, 11:43   #3
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After a fairly mild and dry first half of April, things looks like turning slightly more unsettled with a definite cooling trend, and finishing up possibly very cold as we head into the beginning of May. Temperatures gradually lowering day by day over the next 2 weeks and finishing up several degrees below normal around the 1st of May.

We stay relatively dry with a cool easterly over the next week, keeping eastern coastal areas on the cool side.



Around the 24th of April heights begin to rise around Greenland and northern blocking is getting set up, this results in much cooler air beginning to reach Ireland from Scandinavia.



We finish up on May the 1st with a bitterly cold north-east flow with -5 uppers close to us,this would be a real snow maker in the winter, but of course this is teh start of May and exactly what we don't want to see set up as we head towards summer. Typical and beginning to look alot like June 2019. Showers could turn wintry on the hills with this one and daytime temperatures in the single digits widely.



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15-04-2020, 12:15   #4
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It has the whiff of a late April - early May sometime back in the '90's. I remember looking out the window to see snow fall courtesy of a potent northerly. I'm not saying the same will happen this time, but as you say it will feel very unseasonal if it comes to pass.

Last edited by nacho libre; 15-04-2020 at 20:41.
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15-04-2020, 14:25   #5
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Originally Posted by nacho libre View Post
It has the whiff of a late April - early May sometime back in the '90's. I remember looking out the window in to see snow fall courtesy of a potent northerly. I'm not saying the same will happen this time, but as you say it will feel very unseasonal if it comes to pass.
Either 1995 or 1996 if I remember correctly. Snow showers in May, often while strong sunshine, much like today, was shining!
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18-04-2020, 19:41   #6
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April has been a very settled month so far. After a fairly mild first 10 days, things have certainly cooled down alot over the past week.

Looks like we have one more dry week before things start to turn much more unsettled once again with a possible cold snap into the final week of April.

Heights rise over Greenland from next Saturday with the Jet starting to take a more southerly track.



Low pressures track to Ireland by Monday 27th of April with colder air just to our north.



Unsettled and chilly on Tuesday 28th of April.


Milder and more settled by Thursday the 30th of April, but this doesn't last long.


We finish up on 4th of May with a cool and unsettled flow in from the Atlantic.


Could we be in for a rather cool and unsettled May? Only time will tell.
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18-04-2020, 20:31   #7
 
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April has been a very settled month so far. After a fairly mild first 10 days, things have certainly cooled down alot over the past week.

Looks like we have one more dry week before things start to turn much more unsettled once again with a possible cold snap into the final week of April.

Heights rise over Greenland from next Saturday with the Jet starting to take a more southerly track.



Low pressures track to Ireland by Monday 27th of April with colder air just to our north.



Unsettled and chilly on Tuesday 28th of April.


Milder and more settled by Thursday the 30th of April, but this doesn't last long.


We finish up on 4th of May with a cool and unsettled flow in from the Atlantic.


Could we be in for a rather cool and unsettled May? Only time will tell.
It was a beautiful weak in the western two thirds of the country. No cooling down. These FI charts are just that FI.
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22-04-2020, 12:24   #8
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FI still going for a cool spell of weather from next week and lasting into the first week of May. The change to cool and unsettled conditions has been delayed by a few days already so let's see if this continue's to get pushed back into May.

Winds turn into the north from Monday 27th of April with very cool conditions moving south right across the country.



Low pressures move in around 1st of May and continuing cool.


We finish on May the 6th with northern blocking trying to get going again with the possibility of another cold plunge from the north-east.


A potential for some frost too during night time next week.




ECM also on board for some rather cool and unsettled conditions at the beginning of May:

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22-04-2020, 18:51   #9
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Yeah ECM 0Z would produce quite a bit of rain starting around Sunday in the SW . Probably just what the farming community are looking for once the tap gets turned off again soon after

Looks to cool down a fair bit all right with heights lower and and LP much more evident.

Will see what the ECM 12Z shows later.







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22-04-2020, 20:24   #10
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ECM 12Z showing less rain next week than the earlier run.




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23-04-2020, 23:37   #11
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ECM 12Z showing fairly deep LP develop towards next weekend introducing very unsettled weather. Would be wet and windy with possible thunderstorms if it played out like that . GFS has a softer approach wet but not windy. Will see if it is still there tomorrow and how the models compare.

ECM goes on to show HP build towards the S around Sunday of the B/H weekend , GFS not so. A lot of uncertainty in the charts after midweek.

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23-04-2020, 23:43   #12
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ECM upping the rainfall amounts again but all dependent on how the LP develops towards next weekend

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24-04-2020, 11:42   #13
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April has mostly been a great month so far, mostly dry, settled and sunny with very little rain. There has been some mild to warm weather, especially in the west. A real change is on the way now, temperatures fall off the cliff from Sunday and into next week with temperatures struggling no higher than single digits in many places.

Temperatures stage a recovery around the 2nd of May but the outlook is much more changeable, this is the wettest run I've seen since early March, could well be an unsettled first 10 days of May with temperatures around average or possibly slightly below at times.



Fingers crossed we see a return to dryer and warmer conditions into the second half of May.
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25-04-2020, 17:31   #14
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Timing uncertain but charts trending LP's over next weekend. How wet and windy waits to be seen but they are looking quite wet Sun and Mon atm.




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27-04-2020, 19:02   #15
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alot of uncertainty over the next two weeks, however it is beginning to look more like the first half of May is going to be very unsettled with no shortage of rain. The much needed dry spell of the past month is coming to a screeching halt this week as bands of rain start crossing the country from Wednesday.

Today's runs shows a period of very wet weather from the 29th of April to the 7th of May. Not as wet after the 7th but remaining unsettled. It may become quite mild or warm at times as very warm air tries to push up from southern Europe, but it will most likely get squeezed over to the SE of England and into Northern Europe.





Low pressure May the 5th could provide some serious rain as this rain will be fueled by the heat from the south and the cold from the Atlantic mixing.

Ireland would narrowly miss out on this surge of heat, which may impact parts of England and gave them a very thundery situation.



We finish FI with Europe warming up very nicely, but Ireland hanging onto the cooler Atlantic conditions with rain at times. Hopefully this isn't a sign of things to come for the summer.

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