Friday, 24 September, 2010
TODAY ... cool but mostly dry with a mixture of cloud and sunshine ... a few of the clouds may produce local drizzle or light showers but amounts will generally be trace to 2 mms. Many places will remain dry. Winds northerly at about 15-25 mph. Highs 13-15 C.
TONIGHT ... partly cloudy with longer clear intervals towards morning, fog developing near lakes and streams inland, as temperatures drop to near freezing (the range will be about -1 to +4 but higher in some urban and coastal locales). Since water temperatures are about 12-15 C in most cases, this cold air easily saturates and so you get dense fog near bodies of water, also in the lowest lying valleys where the coldest air drains.
SATURDAY ... widespread sunshine once the morning fog and low cloud disperse, light winds, highs 13-15 C.
SUNDAY ... after another very chilly start with fog patches and frost, lows near -2 C in some places, the day will turn sunny at least for a while, before some cloudy intervals develop. Highs 13-15 C again.
MONDAY ... cloud in the southwest may bring a bit of drizzle or light rain there, but otherwise, variable cloud, some sunshine Ulster and Leinster, after a cold start there, so expect temperatures to recover to about 17 C from near 2 C in the east, but only from about 10 C to 16 C in the west.
TUESDAY-WEDNESDAY ... cloudy with increasing chances for showery rainfall that may become rather heavy in places, in a mild southerly flow, highs reaching about 18 C.
Anyone heading to the London area might note that the weekend will likely be cloudier there and it could rain at times even on Sunday as low pressure will be trying to back up to the west after clearing away on Saturday.
The day here on Thursday 23rd was gloomy (I really noticed the lack of ambient light for the first time this autumn) with occasional rain that has turned rather heavy this evening, and it has been quite chilly despite a south to southwest wind, at about 15 C. Meanwhile the east coast had a second hot day on Thursday, with 34 C at Washington DC and even hotter in southern Virginia. This hot spell may modify slightly by the weekend when heavy rain develops there. Further south, Tropical Storm Matthew has formed east of Nicaragua and is expected to brush the north coast of Honduras before heading into the Yucatan. Meanwhile, Lisa remains weak but holds on to low-end tropical storm status. Model forecasts are showing a possible Nicole by the weekend near Cuba. The season is almost hyper-active now, although still not quite up to the 2005 pace when we ran out of regular names and had to use Greek letters by December.