Saturday 2nd January rather with showery rain in places and mild (Trawsgoed 12.8c, Pershore 10.4c, Shobdon 17mm).
Addendum (Sept 2016):
Crib Goch 1396mm could be the most in a month setting a new UK record monthly rainfall total. However it is indicated here that Llyn Llydaw, Gwynedd recorded 1436mm Oct 1909:
This erroneous due to a faulty gauge though:
An attempt to place this into an appropriate historical context has revealed that the widely-quoted UK rainfall record for a calendar month, 1436mm in October 1909 at Llyn Llydaw Copper Mine on the eastern flank of Snowdon, is erroneous. The page of errata at the beginning of the 1909 edition of British Rainfall requires the deletion of all previously published records in British Rainfall for Llyn Llydaw Intake and Llyn Llydaw Copper Mine, noting “…corrections made necessary by having accepted the records of two rain gauges of faulty construction.”
We therefore suggest that the Llyn Llydaw “record” for October 1909 be discarded as inaccurate, and that the more reliable assessment of 1430mm at Styhead for the calendar month of November 2009 take its place as – by some margin – the highest monthly rainfall total yet observed in the British Isles. We also suggest that, as records from this exceptionally wet spot are clearly of interest in determining the extremes of orographic rainfall, that consideration be given by the Environment Agency to supplementing the existing monthly gauge at Styhead with a tippingbucket logger to provide hourly and daily totals.
Chilterns Observatory Trust
Some December rainfall totals:
Valley, Anglesey 252.6mm 279%
Crib Goch (713masl), Snowdonia 1396mm possible UK monthly record (added Sept 2016)
Capel Curig, Gwynedd well over 1000mm (no data last few days but 1100 to 1200mm most likely)
Trawsgoed c. 280mm
Llanwnnen 340.3mm 236%
Aberporth 203.4mm 213%
Pembrey, Carms 228.8mm 197%
Hereford 122.4mm 181%
Long Lawford, Warks 69.1mm 123%
Dunchurch, Warks 71.6mm
Crick, Northants 120.4mm
Pershore, Worc 87.8mm 165%
Little Rissington, Glos 112.0mm 147%
Valle 26.1 hours
Llanwnnen 24 hrs 63%
Aberporth 21.1 hrs 41%
Some annual rainfall totals:
Llanwnnen 1453.2mm 110%
Coventry 721.4mm 104%
Long Lawford 608.4mm 95%
Llanwnnen 1423 hrs 104%
Coventry 1558.1 hr 101%
The week ahead: unsettled, showers or longer spells of rain; rather mild to average temperatures
No let up in the unsettled weather in the coming week, showers or longer spells of rain, the Midlands more sheltered at times, even with a mostly dry day or two in places here, but expect further flooding as water tables are brimming over. With this mobile Atlantic driven set up, frost will be at a premium even though we will be in colder (nearer average) conditions much of this week. We have had 41 successive rain days (=/> 0.2mm) here at Llanwnnen and I am not anticipating any dry days in the coming 7, indeed even at this very early stage we can expect January to end up another wet month in all districts.
Wet this Sunday morning, parts of WW have had an inch. Rain clears to bright intervals and showers this afternoon for WW but it remains cloudy with further spells of rain for most of the Midlands until dark, rather mild at 8 to 10c but quite a fresh SE veering SSW breeze. Some of the showers heavy with hail and possibly thunder this afternoon and evening for WW. Further showers for parts of WW tonight but becoming mostly dry for the Midlands this evening. A deep but flabby low slowly moves into Ireland during Monday so another unsettled day. Rather cloudy with showers or longer spells of rain, heavy with hail possible, however sunny intervals and just a few showers making it to the Midlands where many have a 95% dry day. Rather mild again with a moderate to fresh SSW breeze. Still a few showers for WW Monday night, dry over the Midlands where clear spells may lead to a ground frost locally.
By Tuesday the low with a central pressure around 980mbar has edged over to South Wales and SW England, in spite of this plenty of mostly dry and bright weather for the Midlands, with most of the showers over Wales, though even here they should be fewer and further between than was the case Monday. A cooler day as winds turn to between east and north but still up to the January average of 6 to 8c and only light to moderate winds. It becomes dry almost everywhere on Tuesday night and with clear spells there could well be a widespread ground frost and localised air frost as it touches 0c in a few spots. Mostly dry with some sunny spells Wednesday under a slight transient ridge but the next system is due to bring wet and windy weather to WW during the evening. Highs again average at 6 to 9c. It then turns wet and windy in all areas overnight, with gales in places. This feature Wednesday night has potential to bring damaging winds and flooding, and perhaps some hill snow for Snowdonia and the Peak District for a time.
The heavy rain should have cleared all but the East Midlands come dawn, colder fresh to strong westerlies bring showers and sunny intervals for Thursday, maxima 5 to 7c, some heavy showers with hail, and snow possible for high ground. Again the Midlands should be afforded shelter from the worst of the Thursdays showers and here some may manage a dry afternoon. If skies clear sufficiently and winds drop out enough then expect a frost to form Thursday night, however showers may continue for coasts and hills of WW. Remaining unsettled with further showers and more prolonged wet spells Friday and next weekend, temperatures average to quite mild with frost unlikely, max 6 to 10c.