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Bloomin’ March! By Matt Hugo - March 25, 2015.
Topic Started: 25 Mar 2015, 10:30 PM (37 Views)
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Bloomin’ March! By Matt Hugo - March 25, 2015.





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OVERVIEW: Further highly changeable conditions are expected during the remainder of the week which is in-keeping with the week as a whole and of which continues to highlight the rather extreme and particularly varied conditions that can be experienced in March. Despite many areas experiencing a fine and settled spring-like day today, overnight rain is expected, with sleet and snow on hills, this then being followed by further rain or showers for some areas to end the week, but equally with some drier and brighter weather too.

ANALYSIS:

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1) This is an active weather front that is moving into the UK through the course of Wednesday afternoon and then more particularly across all areas into the overnight period. Ahead of this a ‘window’ of more settled conditions has been in evidence today.

2) I’ve highlighted this region because this is a region of further low pressure development in the coming days. One low pressure is set to bring further rain to more southern areas on Friday and then more widely and more significantly on Saturday as the potential for a deeper low pressure moves across the UK.

WEDNESDAY NIGHT: As we move into Wednesday evening many central and eastern areas of the UK will experience light winds and clear skies for a time. This, as a result, will signal a cold first half of the night with perhaps an early frost. However, the advancing frontal systems approaching from the west will increase cloud across all areas towards midnight and with a subsequent rise in temperatures. Quite an active set of weather fronts will then move across all areas of the UK overnight and into the early hours of Thursday bringing outbreaks of rain, some of which will be heavy. Equally, given that quite a cold air mass will be in place over the UK then there is a risk of the rain turning to sleet and snow from North Wales northwards and especially above 250m to 300m, with some significant snowfall across the higher ground of Scotland in particular. The higher resolution 3KM model highlights this evolution well and note the precipitation type image clearly showing a risk of sleet and snow in the north overnight.

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THURSDAY: Into Thursday and clearly for more eastern areas of the UK in particular it will be a wet start as the weather fronts continue to move eastwards, so outbreaks of rain and showers are expected quite widely across E Scotland, E England, E Anglia and SE England in general on Thursday morning. Following on behind through the course of the day will be improving conditions as a ridge of high pressure builds into the UK from the west. So, the outbreaks of rain across more eastern areas will clear away into the North Sea by late morning and then many areas of the UK generally become drier and brighter through Thursday afternoon but with quite a chilly NW’ly wind blowing. A mixture of sunshine and showers remains possible, but overall by the end of the afternoon and into the evening many areas are dry and chilly as the ridge of high pressure builds in. This is highlighted well on the below forecast charts.

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FRIDAY: As the ridge of high pressure moves across the UK later on Thursday and overnight into Friday it will signal another chilly night and start to Friday morning with some frost possible. So, Friday is expected to start predominantly fine and dry for most areas with some bright or sunny spells, but it will be chilly. Another weather system is forecast to then move into more southern and south-western areas of the UK during the course of the day and especially into Friday afternoon. This, as a result, will bring thicker cloud to many southern areas of England, Wales, SW England and parts of southern Ireland with some outbreaks of mainly light or moderate rain. To the north of this region, across most of N England and Scotland, Friday is a mainly dry day with some bright or sunny spells and just with a few scattered showers. The 10KM model highlights this situation well and note the mainly light or moderate rain moving into more southern areas of England and Wales through the day, but with the precipitation generally weakening and becoming increasingly patchy with time. In contrast it is drier further north but with some scattered showers.

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TEMPERATURES: Temperatures will generally remain slightly below average to end the week and feeling particularly cold in any persistent wet weather. Maximum temperatures generally ranging between 5C and 10C overall and note on the below middle image the rather cold start to Friday across most areas beneath the ridge of high pressure with sub-zero temperatures certainly possible in places to start Friday.

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Chief Forecaster: MH

Source Info: eumetrain.org


Link ................... http://www.ukweatherforecast.co.uk/bloomin-march/



Source ............. Posted Image
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