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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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The general pressure situation for the whole of February 2004 has a
medium sized LP area off W and NW Scotland. A thin HP ridge stretches from the Azores HP NE'ward to be centred along the French coast as far as Holland. This HP area extends SE'wards to cover Germany, France and a small part of the W Mediterranean. General winds for the whole of the month are SW over England, Wales and Ireland, but take a S'erly direction over Scotland. The dividiing-line between HP and LP seems to stretch from Edinburgh, down to the Isle of Man and SW Ireland. General temperatures over the whole of the month are above average due to advection from the Azores area. Rain is still heavier in the NW of the country while dryer conditions cling to the SE of the country. The general pressure situation for the period 1st to 10th February 2004 has a large complex LP to the S and SW of Iceland with a trough down to Ireland, and stretching on further to France and E Spain. On its S side of the Iceland LP, a strong belt of westerlies draws disturbances across the Atlantic into the British Isles. A flat HP ridge from the Azores HP reaches just up to Biscay. But HP over the continent covering the Norwegian Sea, stretches southwards to the North Sea, Germany, S Poland and the Balkans. An area of LP lies near Finland. Winds over the period come generally from a southerly direction, but have a westerly direction in the W of the country. Generally, the W side of the country will be wetter than the E side. London's temperature is expected to have small, warm peaks near 2nd and 3rd, 5th and 10th. and small cold dips near 4th and from 7th falling to 9th February. The general run of weather over the period starts with a W to SW'erly airflow. LP's moving E'wards skirt the top of the country, as HP lies to the S. After 3 days, a medium to large sized LP to the N of Britain moves away E'wards and behind that, HP enters the country from the SW and intensifies to cover the whole country on 5th and 6th. A new LP arrives from the W on 7th and pushes the HP into the continent by the 8th. Cooler W to NW winds come in behind the LP on the 9th. Then a quick moving ridge of HP rushes across Britain from the W early on 10th. It reaches E'tern districts as LP approaches the W coast later in the day. Days with possible strong winds during the period a- about 1st - off the W coast of Scotland. about 4th - in the SW of England from a secondary LP. about 6th and 7th - in the SW as a trough and a possible secondary approach from the W. about 8th - possibly in the North Sea as a LP area moves away and also in the SW where a possible LP moves in. about 9th - near NE Scotland from a LP SE of Iceland. about 10th - ear the W and NW of Scotland and Ireland from an approaching LP area and a secondary. On 1st February LP lies to the W of Scotland and drifts NE'wards, and a trough on its SW flank appears to swing SE'wards towards Brittany and W France. The Azores HP has a small HP up to S North Sea. SE winds veer to SW and back to S. During the afternoon, winds could become variable. . Dry weather over E , SE and S districts moves away as rain along the W and SW coasts drifts into the country during the morning, covering the whole country by the afternoon. On 2nd February a small to medium sized LP lies to the W of Ireland and moves steadily E'wards towards the W coast of Britain. A small, weak ridge of HP from the Azores covers England and the S North Sea, This HP and a small LP over S France move NE'wards into the near continent- Winds will be light at first becoming S and veering SW later. Rain showers in W districts will move NE across the country. On 3rd February A LP to the W of the country has a trough ENE'wards into Scotland. On its S flank a secondary depression is moving NE and the parent LP drifts NE'wards towards the S of Iceland. HP covers the near continent - Spain, France, Germany and Poland. Winds will be SW. Rain will cover the NW of the country, but the SE may manage to keep dry for most of the day. On 4th February a complex LP lies near S and E Iceland with a secondary LP somewhere in the Channel. (possibly near Plymouth at 08.00 Z). An area of HP comes into the SW of the country by early afternoon and spreads into Ireland and England during the evening. Winds will be SW but could be SE in the S of the country. veering NW from the W. Heavy rain in the NW of Scotland and the S of England at first, but cooler showery weather in all parts later. On 5th February HP extends from the Azores-HP NE'wards to cover SE Britain,France Germany and SW Scandinavia. To the W of Scotland, a LP influences NW and W Scotland and N Ireland. Winds are light in the S and E of the country but come from the S or SW over the NW of Britain. Although unsettled weather passes across the NW and N of the country, the SE of the country has the better weather. On 6th February HP covers most of the country and spreads E'wards into Germany and Poland. To the NW of the country, a medium sized LP approaches the NW and W parts of the country. During the afternoon, a secondary depression approaches the SW bringing unsettled weather to these parts. Winds will be light at first, but stronger S and SW winds will move in from the W. Fair weather at first will be replaced by rainy weather from the west. On 7th February a medium sized LP lies near S Iceland with a trough and associated secondary LP near S Ireland. Winds come from a S'erly direction in the E of the country and blow from a W or NW direction in the W of the country. Weather will be showery for most of the day, but some improvement can be expected for a while in the SW of the country. On 8th February a LP lies near Iceland and a small LP has moved to the N North Sea and lies near the E of Scotland. A large area of HP covers France, Italy and parts of the W Mediterranean. A small area of HP lies to the SW of Ireland but has to contend with a wave disturbance near Brittany before it can influence our weather. Winds are mostly W or SW across the country. Weather is mostly bright intervals and showers. On 9th February a medium to large sized LP lies near Iceland with a trough down the W coast of Ireland. A belt of HP stretches from the Azores-HP to Biscay, France Germany, Poland and Russia. During the day, the trough near Ireland swings E'wards across the country to be followed by a small ridge into the SW and S of the country moving quickly E'wards. Winds will be SW veering NW for a while but becoming lighter from the W or SW later Rain associated with the trough will move E'wards followed by improving weather from the W. On 10th February LP lies to the SW and NW of the British Isles. In the SW, a secondary LP is positioned just SW of Ireland, moving NE and filling. To the NW a LP is fixed near Iceland. HP covers the near continent and the North Sea. Winds are mostly from the S or SW. Rain showers move from Ireland along to Scotland but fair weather covers the E and SE parts of the country. Cheers, Keith |
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