A DRIER AND WARMER END TO AUGUST LOOKING POSSIBLE WITH HIGH PRESSURE BUILDING
This weekend is looking rather unsettled weather wise with periods of heavy rainfall and windy weather. A spell of heavy rainfall will move in of the Atlantic tonight (Thursday) with heavy falls of rain for many areas on Friday morning as the band of rain clears later Friday morning and over the early afternoon to the east over the Irish sea followed by a mixture of bright and sunny spells of Friday but showers too.
On Friday night it will be come windy especially along coastal part where winds will be strong and southwesterly in direction.
Saturday will see some bight and sunny spells but some showers too in places these heaviest across the west and northwest. Winds on Saturday will be strong and gusty reaching Gale force along the west and north coast and gusting between 70km/hr to 100km/hr for a time.
Saturday night will see some further showers across the western and northwestern coastal counties some which will be heavy, Elsewhere it will be mainly dry with clear spells. Winds inland will become a little less strong overnight with southwesterly breezes but remain strong along coastal parts.
Sunday will see showers some which will turn heavy or into longer spells of rain with the risk of some turning thundery in nature, Western and northwestern areas will be at the highest risk of seen these showers on Sunday. Becoming dry for many areas overnight with good clear spells, There will be the risk of further showers across the northwest and western coastal counties overnight.
Overall the weekends weather forecast is more like a forecast that you would see in the autumn around October time especially.
As week head into the new week it then when we see a gradual change over the week with much better news. Early next week to the southwest of Ireland a number of weather model are hinting at a anticyclone area of pressure also know as a area of high pressure building just to the southwest of Ireland over the Azores. This Azores high then starts ridging northwards over next week.
Monday, Tuesday and Wednesday will be unsettled days across Ireland with further rain and heavy showers and by Thursday and Friday next week that Azores high will have pushed northwards with high pressure over the whole of Ireland with dry weather and some sunshine to.
Over next weekend Saturday the 24th of August and Sunday the 25th of August the big area of high pressure then looks set to sit firmly over Ireland at around 1025 millibars which is a good strong area of high pressure that would give some nice pleasant summer weather to end the Summer.
As the high drifts eastwards into the following week between Monday 26th of August and Friday the 30th of August it indicates it could drag up potentially warm air from the south and southeast. Temperatures in some parts of Ireland possibly around the mid 20s.
Chart below shows the high drifting eastwards over over the following week with a warm south to southeast flow.
It will be interesting as week head into the next week to see how this plays out because many of the weather models are going for this which is a good sign.
One of the reason for this potentially late summer spell of weather we may see is due to strong tropical storm over Asia which will send a ripple along the jet stream. Tropical storm Krosa over the northwest Pacific which has downgraded from a typhoon moved northwards over Japan and then over eastern Russia will manage to bump into the jet stream sending a ripple along the jet stream in a easterly direction. This ripple is like when you have a rope and flick it and it sends a ripple along it.
When tropical storm Krosa bumped into the Jet Stream it send a ripple the whole way across the pacific Ocean to the USA and further eastwards across the Atlantic ocean towards Ireland where the jet stream will be located to the north of us. This ripple will then divert the jet stream further northwards away from Ireland allowing high pressure to build from the south bringing warmer and drier conditions.
I will update on this again over the weekend into next week when more information is available.
Kenneth Mc Donagh from the Donegal Weather Channel
Click on the tabs below to view the new forecasts available under the forecast section.
2019 CALENDAR NOW ON SALE