THIS EVENING & TONIGHT will bring an increased chance of frost and fog in the inland south but perhaps becoming a bit more widespread into parts of the midlands too (see Met Alert here). Cloudier further north. Lows -2 to +3 C except closer to 5-7 C near some coasts.
THURSDAY and FRIDAY will continue with similar conditions although a trend towards more widespread low cloud may be noted, and highs may drop a degree or two as a result.
By SATURDAY a weak frontal disturbance will try to push in from the northwest. It may succeed in dropping small amounts of rain in parts of the north, with dry weather but cloudy skies further south. Highs again around 4 to 8 C.
From SUNDAY to an unknown end point of this episode (at least middle of the following week), high pressure will remain in control and there will be more rather featureless weather punctuated by the anguished curses of weather geeks as they prepare to hurl themselves off high places. This may be prevented if the weather models return to a theme briefly explored by the GFS model on one run earlier Tuesday, showing a lot of cold air flowing in from the north. This idea came and went in one model run and is no longer really a strong possibility but there are a few faint signs of colder air masses towards the end of January.
The Irish Weather Online daily long-range forecast is provided by Peter O'Donnell.