Disclaimer: The forecaster is not responsible for losses or damage
incurred by the forecast-user. The forecast-user is responsible for his
own actions at all times.
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DRY, WARM WEATHER AT FIRST; COOLER AND SHOWERY IN THE MIDDLE, FOLLOWED
BY WARM AND DRY WEATHER JUST AT THE END. GENERALLY COOLER IN THE WEST
AND WARMEST IN THE SOUTH-EAST

The general pressure situation for the period 21st to 30th June shows a
LP area over Northern Ireland and NW Scotland. Cooler W or NW winds
come into the country from the west. SW winds cover E and SE areas.
There should be quite a few windy days especially off W Scotland. Over
Scotland, Northern Ireland and W parts of England and also Wales there
should be an abundance of rain and showers. A ridge of HP should bring
an improvement on 21st, and a new ridge should build up into SW areas
on 28th, moving eastwards across the southern half of the country by
30th. Otherwise, LP governs the weather and keeps HP to the S of the
country..

Windy days are frequent for the W of Scotland. .

Mild temperatures at first caused by SW winds last up to about 23rd then
temperatures start to cool off on 24th to reach their lowest about 27th
and 28th. This is caused by cool Atlantic air coming into the country
behind a depression to the W and NW of Scotland. After that,
temperatures begin to rise to reach a high on 30th.

The run of weather starts on 21st when a ridge of HP comes into the
country from the SW of England. Winds are expected to be light and
variable, but from a N'erly direction in the extreme SE of England.
Over Ireland and W Scotland, winds should have turned SW and rain
should be coming in from the Atlantic. Elsewhere, it should be fine
and dry.
On 22nd, The anticyclone has moved into the North Sea but it still
affects S, SE and E England. Cyclonically shaped isobars are into
Ireland and Scotland. Winds come generally from the S and SW over
the country. Rain is expected to fall in the N and NW of the country
but fair weather should hold on in the S and SE.
On 23rd, LP lies to the SW of Iceland and has a trough stretching
E'wards towards SW Norway. A new surge of HP from the Channel
northwards brings an improvement in the weather for England and Wales.
Winds will be mostly W or WSW but light and variable in the southern
half of the country. Showers are most likely in the W of the country.
Fine weather is expected in the E and NE of Britain.
On 24th, the HP of yesterday now stretches N/S over the North Sea and
the near continent. A LP area to the SW and S of Iceland has a small
secondary LP coming E'wards towards Ireland. Winds are S to SW and
rain can be expected in W'ern parts. In the S and SE of Britain, bright
intervals can be expected.
On 25th, LP lies just to the W and NW of Scotland with a secondary near
Ireland. The secondary is expected to fill as it moves NE'wards
towards Scotland. HP lies to E of the country. Winds are mostly S
turning SW later. Rain can be expected in the N and NE of the country,
showers elsewhere.
On 26th, a belt of LP stretches from Northern Ireland NE'wards
towards SW Norway. HP is well to the S and SE of the country. Winds
are SW. A belt of rain showers can be expected from Northern Ireland
to Cornwall, but bright intervals in the SE.
On 27th, a deep LP lies to the N of Scotland and a belt of HP runs
from WSW/ENE along the Channel. Winds will be W or SW and rain will
sweep across the country. It will be dry at first in the E, but
showers will spread into these areas during the day.
On 28th, once again a ridge of HP comes into SW'tern areas and moves
slowly into the rest of England. A small LP could build up over W
France bringing NW winds to SE England. Over the rest of the country
winds should be light and variable. Some rain showers could get into
the NW of the country and Northern Ireland. Improving weather over the
south.
On 29th, the HP ridge over England has not moved much. However, the
LP over W France could have deepened drawing cooler air down the
Channel. Winds should be light in the south - and W in the northern
half of the country. Weather should be fair over most of the country but
rain could come into the W of Ireland later.
On 30th, the HP ridge has moved eastwards and now lies SW/NE across SE
England and the North Sea. A deep depression to the SW of Iceland has
cyclonically curved isobars into the NW of Scotland and Northern
Ireland. Winds are mostly SW over the whole country. A belt of rain
stretching from NE Scotland down to SW England moves eastwards.

The next 10-day period lies in the month of July. Generally, for July,
I expect an increase in the frequency of NW winds, because Britain
lies generally on the cooler side of the HP over the Atlantic with
relatively LP over the Norwegian Sea and Scandinavia. This would
indicate a summer monsoonal weather-type for July.

Cheers, Keith.