Download May Generally dry, in districts 19 57- sunny western

Monthly
Summary
from
compiled
Published
May
returns
Generally
19 57-
eastern
days
was warm
Scotland,
three
in Western
from
Scotland
the
into
well
rose
With
Weather
Atlantic.
the
arctic
the 4th
on
freshening
south
high
blocking
dry,
in
shine
persisted
but
an
on
the
across
swept
the
at
into
some
places.
until
mid-day
western
on
heavy
weather
in
and
month
local
and
fell
over
many
the
of
7th
the
and
weather
was
following
The
extension
in
12th,
Atlantic,
our
of the
country
west
the
on
south
coast
occurred
air, frost.
the
one
parts
deep
centre
and
of
central
upper
of
approaches
on
around
Winds
British
coast.
the
backed
milder
east-
trough
than
10 hr.
of
sunfog
early
morning
England,
southern
and
off
Canada
carried
north-east
was
over
the
thundery
thunderstorms.
rain
and scattered
giving
country
Ireland
during
few day;
the next
the west
to
of
pressure
remained
during
further
this time
outbreaks
especially
such
on the
were
and there
day
the wettest
of the month,
was
places
when
many
a
at
16th,
which
by strong
heavy
depression,
winds
accompanied
and
secondary
small
Sea to the northern
Irish
North
Sea. On
from
the
the
moved
showers,
England
formed
front
off south-west
on a trailing
cold
depression
17th
a
Irish
Sea and
up the
thence
to deepen
as it moved
to
continued
and
in places
and was heavy
Scotland
was widespread,
; rain
near
north-east
Valley
Ronaldsway
both
depression,
and
recording
the
of
centre
the
12 hr. As the depression
moved
away northward
pressure
inch
in
an
nearly
level
Isles
had been
than
on the 19th
rose to a higher
British
the
over
the passage
day since
the 6th, and after
of a further
rainany
on
reached
became
high
over the whole
established
pressure
country
belt on the 20th,
For
two weeks.
of the previous
wet spell
to an end the rather
brought
and
the highest
pressure
was to the north
of the month
remainder
the
of
most
in the south,
Scotland
winds
easterly
with
which
were
of
or north-west
By the 24th
Channel.
in the English
a deep
upper
trough
times
at
strong
Atlantic
flow
considerable
in central
with
meridional
to the
had formed
in the region
Isles.
The
blocking
the British
of
pattern
weak
a
east and
14 hr. of sunshine
than
with
more
sunny,
particularly
were
26th and 27th
days
the 31st,
the warmest
were
together
with
of the
and
places,
some
at
Scotland
dull
weather
reached
and spread
slowly
but on the 28th
month,
days
of the month
a ridge
of high
pressure
During
the last three
south.
from
Isles
British
an anticyclone
centred
near
the
the
over
extended
deal
in the
a good
of cloud
there
was
east and
Azores,
although
and
had long
sunny
periods.
of England
Midlands
the west
of
outbreaks
low
pressure
excess
at
Meteorological
and
9 h.
wind.
ranging
Office,
Pressure
from
Air
2.5
MinirtrY:
was
mb.
the average,
everywhere
above
Aldergrove
at Southampton
and
SIR
GRAHAM
SUTTON,
C. B. E.,
mb.
direction
ing
Stornoway.
at
Crown
Surface
6th
the
until
predominantly
and
in
the
to
D. Sc.,
copyright
reserved
districts
winds
a southerly
north-westerly
were
direction
19th
the
on
from
mainly
from
7th
to
20th.
and
a northerly
18th,
becomWinds
were
22nd,
the country
on the 21st and
between
they
otherwise
from
were
generally
east and
north-east
21st
Gales
in Scotland
locally
the end of the month.
until
occurred
on
Sth and 19th,
the 3rd,
6th,
17th,
and in England
and Wales
on the 5th,
18th
24th-27th;
fairly
in the Midlands
and
they
were
widespread
and
England
south-east
on the 24th
and in the west
of England
on the 18th
when
gusts
of 54 kt. and 56 kt. were
recorded
at Fleetwood
and Bidston
Observatory
respectively.
south-easterly
the
western
part
of
from
Mean
below
1921-50
the
generally
0.4°F.
in Scotland
and Wales,
temperature
was
being
1.1°F.
in England
7th,
Ireland.
former
the
on
Lowest
date
11°F.
temperatures
was
occurred
recorded
on
latter,
screen
the
on
ground
screen
at Leadhills,
and on the
temperature
to 26°F.
during
May
for 15 yr. The
at Dyce,
the lowest
there
recorded
in Scotland
70°F.
week
of the month
was the warmest,
was exceeded
27th
in England
several
places
on the 26th
and
while
temperature
highest
on the 31st.
the
Extreme
over
bridgeshire
and
than
occurred
Devonshire
the
average
southern
part
of
England,
north-west
Northern
4.40
in.
in.
17th
0.91
at
in.
18th
1.08
in.
16th
and
they
were
15th,
also
and
in
than
Early
in
in
the
part
24
hr.
south-eastern
were: Waterworks),
Co.
Down,
Scotland
a wide
area in
l7th.
on the 4th and
12th,
on the 11th
and
over
recorded
widely
19th
and
day
the
for
in
the
also
occurred
area
sunshine
England
Ireland.
The
Tenby
east;
May.
morning
England
fog
and
of
1.07
and
In
from
England
moderately
8 other
days
on
11th
to
Wales
and
widely
between
on
the
General.
western
recorded
locally
the
extreme
part
of the country
140 per cent.
of its
locally
was
until
south-west
aurora
10 days
on
fairly
about
The
and
On
and
at Hastings.
and
expressed
as a percentage
of
107 over
Scotland
and Wales,
was reported
Wales.
Fog
Phenomena.
Scotland.
Director
London
general
110 over
it persisted
when
fog occurred
in
Miscellaneous
F. R. S.,
the
Wales,
frequent
in Scotland
from
3rd to 7th
showers
were
England
6th.
eastern
and the Midlands
on the 5th and
were
reported
as far south
as East Anglia
and Thanet
The
sunshine
coast
in
sleet
average
was
Northern
over
11th
Dorsetshire,
and
in parts
of west
23rd.
50
12 days
More
Devonshire.
at Princetown,
Aberdeenshire.
at Huntly,
reported
16th
and
they
following
Fog.
falls
occurred
were
Sunshine.
of
Scotland.
north-east
(Belfast
at Annalong
Hartland
Point,
Devonshire.
Thunderstorms
sunnier
west
and
in Wiltshire
Cornwall,
and
Scotland
and
south-west
heavier
the
8th
the
in
and
locally
Ireland.
Among
occurred
the 5th
was
general
precipitation
expressed
as a percentage
of the
74 over Scotland
was 83 over England
and Wales,
and
Ireland.
Less
half
in Camthan
the average
occurred
locally
in
in
Yorkshire,
adjacent
counties,
parts
of
Derbyshire
and
Snow
at
The
Nottinghamshire,
the
8th
last
6th. the
on
average
Northern
80
and
fell
included:
the month
and Wales)
-(England
23°F.
House
the 31st,
at Lincoln
and Moor
on the
(Scotland)
74°F.
19°F.
at Colonsay
on the 27th,
7th;
(Northern
Ireland)
69°F.
at Armagh
on the 27th,
at Kincraig
on the
27°F.
at Aldergrove
Precipitation.
the
for
temperatures
76°F.
at Wakefield
on
6th and 7th respectively;
1881-1915
resulted,
flow
zonal
of the low latitude
depression
a large
complex
and
a
air
moved
4.1
and
20°F.
in
6th
observers
sunny in western
6th
5th
and
voluntary
the deficit
average,
0.4°F.
in Northern
and
the
Isles
and
OFFICE
Temperature.
rain
and a
8th.
On
the 9th
a front
in some
districts,
rain
prolonged
fine
with
more
day
extensive
intensification
the
south-west
Channel
moved
away
eastwards;
from
the Atlantic
and fronts
England
bringing
widespread
giving
extreme
as the
south
widespread
7th
as pressure
on the
Sea
the Norwegian
over
eastward
11 th and
the
as far
ground,
slow-moving
or
70°F.
the temperature
southward
over the country
lower
day and with
than
the previous
was 10°F.
winds
on the 5th snow
of the northerly
showers
temperatures
the whole
over
Ireland
and
into
ward
in the
change
marked
but
reached
locally
two
exceeded
air had
reached
south
of England
colder
in the
temperatures
first
the
temperatures
although
70°F.
during
air
occurred
spread
became
and
2nd
the
3rd,
the
on
was.
there
toward
on
sixties
a temporary
England
in eastern
lowest
The
6th.
and
when
sunny;
Isles
British
afternoon
north,
of
spread
the
and
the
places
at most
and
over
stations
STATIONERY
into
was divided
dry and dominated
May
during
weather
six days,
OFFICE
of official
MAJESTY'S
by HER
distinct
The
three
phases.
by a large anticyclone
to the
first
were
which
during
the
of the settled
a continuation
spell
constituted
of Ireland,
west
Most
the second
rain fell during
phase,
of the month's
latter
of April.
part
from
the 7th to the 20th.
extended
which
period
cyclonic
unsettled
an
days
and dry.
again
anticyclonic
last eleven
were
The
the upper
air flow over the Atlantic
of the month
was
At the beginning
in the
by a deep
trough
near the Canadian
seaboard
and a high
dominated
The
Report
METEOROLOGICAL
of observations
5
Number
74
Volume
Weather
THE
OF
M. O. 625
in
was
usual
1921-
the
and
generally
amount
Scotland
on the 10th
Patches
of sea
17th
to 20th.
extensive
mid-day.
from
was
visible
on
13
108
nights
and
and
and
in