Windrush Weather

More weather fronts approaching but will they bring measurable rainfall?

Two weather fronts dominated Monday with thick cloud until mid-afternoon with light drizzle observed for a couple of hours, starting just before 11.30. However, the precipitation was light and only dampened surfaces eventually measuring 0.2mm. As the clouds thinned and eased eastwards after 14.00 the sun broke through strongly pushing the thermometer to a peak of 16.2C late in the afternoon at 17.20 being 2.1C above average. The clearing skies meant the past night was chilly that saw the temperature drop to a low of 3.9C at 06.06C before the sun got to work lifting the temperature to 7.8C by 08.00.

Tuesday initially arrived with weak sunshine. The moist air and falling temperature overnight caused radiation fog to form in the River Og valley during the early hours, that quickly dispersed as the sun got to work, as a result by 07.00 it had completely cleared. Humidity of 89% was measured at 08.00, the highest for over a week.

A depression is now approaching Ireland that will later today arrive over central Ireland. This low pressure system is projected to cross southern England this evening pushing two weather fronts across the UK with possible substantial rainfall. The current barometric pressure of 1016.7C, logged at 08.00, will drop substantially as the centre of the depression is currently reading 996mb, this will result in the wind picking up during the afternoon ahead of the rain expected just before midnight.

Any measurable rainfall that falls during the night would be very welcome for gardeners so that it can be absorbed into the soil, rather than quickly evaporating if during daytime, as we have had less than 9mm of precipitaion over the last 52 days. This timing would be fine for those currently on holiday!

At 08.50 the radar showed showers breaking out over Devon and Cornwall with a thick bank of cloud leaving Ireland heading for the west country.