Temperatures To Drop Following Very Mild Start To 2013

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Following an exceptionally mild start to 2013 (averaging 4-5c above the normal mean temperature), the latest GFS computer model ensemble confirms falling temperatures over the coming days. The temps shown above refer to the air temperature at 2 metres above ground level in Co Down.

Daytime temperatures are likely to be 2-3 degrees milder in the western half of Ireland. Overnight frosts from tomorrow (Tuesday) night becoming more severe and widespread toward the weekend.

Beyond this weekend, there is a wide scattering of the various model perturbations in relation to our weather. The latest (06am) GEFS output presents somewhat of a mild rather than cold outlier. However, such an outcome is very uncertain at this stage. Image c/o Netweather.tv


TONIGHT ... Another interval of showers with moderate and locally gusty SW winds 30-50 km/hr, mild with lows about 6-9 C. This rainfall may be fairly brief and rather light compared to today, 2-5 mm.

TUESDAY ... Cloudy and breezy with morning showers, sunny intervals developing as winds veer from SW to WNW 30-60 km/hr except 50-90 km/hr in Donegal, turning somewhat cooler. Morning temperatures 9-10 C then about 7-8 C by afternoon.

WEDNESDAY ... Isolated frost or fog inland east, some sunny intervals in eastern counties, variable cloud with risk of showers west, lows 0-4 C and highs 6-8 C.

THURSDAY ... Becoming colder with rain possibly mixing with sleet, temperatures steady in the range 3-5 C and possibly colder in Ulster where rain may change to snow.

FRIDAY & OUTLOOK ... Sleet or snow possible in east winds 30-50 km/hr, highs 2-4 C for most and 4-7 C in Munster. The cold may relent somewhat after a day or two then redevelop mid-week around the 15th. More severe cold could eventually develop late this month or in February.

 For more on the coming week's weather, please read the TMT long range forecast from Peter O'Donnell - http://www.meteotimes.net/2012/08/peter-odonnells-long-range-weather.html