February 1947:Exceptionally and persistently cold; dull; heavy
snowfall.
The weather of the month was distinguished by exceptional and
prolonged cold, accompanied by persistent easterly winds. It was very
dull except in the west of Scotland and snowfall was heavy, with deep
drifts.
The pressure distribution was dominated by anticyclones over Scandinavia
and Greenland. In consequence Atlantic depressions followed tracks to
the south of the British Isles. From the 1st to the 5th a secondary
depression off south-west Ireland moved very slowly east-south-east
to northern France where it filled. Gales were reported locally from
the 1st-4th. Heavy precipitatioon occurred in the south-west on the
1st;the precipitation spread north over most of England, Wales and Ireland
on the 2nd and 3rd to parts of Scotland on the 3rd and 4th. Snow lay
over most of the country during this period, though there was a thaw
in the extreme south; for example, day temperatures rose to 40°F
(4.4°C) at Kew, 41°F (5.0°C) at manston and 42°F (5.6°C)
at the Scilly Isles on the 4th. On the 5th snow was widespread but not
generally very heavy;nevertheless on the morning of the 6th,
level snow was 20" (51cm) deep at Huddersfield and 44" (112cm)
at Forrest-in-Teesdale. By the 7th another disturbance was
situated off our south-west coasts;subsequently it moved very slowly
east-south-east and filled up over central France on the 12th. Weather
continued very cold on the 7th and 8th, apart from a thaw on the extreme
south-west coasts, and considerable snow occurred in the south-east,
east and east Midlands of England. On the 9th and 10th an occlusion
spread north over England and somewhat higher temperatures were registered
with further precipitation, although it continued cold.
Thereafter the anticyclones completely dominated conditions and mainly
dry weather prevailed until the 20th. Meanwhile temperature remained
continuously below freezing point in many places from the 11th to the
22nd or 23rd or even longer. On the 20th yet another depression appeared
off our south-west coasts;widespread snow was reported in England and
Ireland from the 20th to the 22nd. A distinctive feature of the period
2nd -22nd inclusive was the long spell of north-east to east winds and
almost complete lack of sunshine in many areas.
On the 24th a feeble ridge of high pressure extended over south-west
Scotland and England to Germany, but on the 25th a depression approached
south-west Ireland and subsequently moved rather quickly north-east
across the British Isles to east Scotland and filled up. Local gales
occurred in south-west England on the 26th and in east Scotland on the
26th and 27th. The strong winds in the north and east were accompanied
by considerable snowfall, with deep drifts.
Pressure and Wind:Mean presure exceeded the average
in Scotland (Lerwick +12.2mb) and was below average in England and Wales
(Scilly Isles -11.1mb). Easterly or north-easterly winds prevailed until
the 22nd. Given that easterly winds also occurred in late January this
combined period was outstanding. (It was reported from Southport that
the persistence of easterly winds was greater than in any month going
back to 1871).
Among the highest wind speeds reported were 72mph at Pendennis Castle
(Cornwall) on the 8th, 67mph at Holyhead and Bell Rock Lighthouse on
the 26th.
Temperature: Mean temperature was exceptionally low;
as far as can be estimated it was the coldest month, apart from February
1895 over England and Wales, since before 1881; over Scotland there
were two colder months (January 1181 and February 1895). At Armagh in
Northrn Ireland it was the coldest month since February 1895. At the
Radcliffe meteorological station in Oxford it was the lowest temperature
for any month as back as 1815. In most areas the low mean temperature
was due to a large extent to the low mean maximum temperature. On the
whole the mean minimum temperature was not so exceptional.One of the
most striking features was the prolonged spell from the 11th to the
23rd when temperature remained continuously below freezing in many parts
of England. At Oxford, temperature in the screen remained below freezing
from 18h on the 10th to 6h on the 26th, the longest period since before
1881.
The extremes for the month were: (England and Wales) 52°F (11.1°C)
at Penzance on the 26th, -5°F (-20.8°C) at Woburn on
the 25th; (Scotland) 43°F (6.1°C) at Arbroath on the
18th, -2°F (-18.9°C) at Braemar on the 25th; (Northern Ireland)
42°F (5.6°C) at Armagh on the 27th, 12°F (-11.1°C) at
Garvagh on the 24th.
Precipitation:The general precipitation expressed as
a percentage of the average for the period 1881-1915 was 82% in England
and Wales, 43% in Scotland and 39% in Northern Ireland. More than the
average occurred in a narrow coastal belt of east Scotland; more than
200% was received over part of Durham and around Cromer in Norfolk.
Less than 50% occurred over practically the whole of Northern Ireland,
north-west England, and most of Wales and north Devon. Less than 10%
was registered over most of west Scotland and the Inner Hebdrides and
less than 5% in the Great Glen, the western Highlands and the western
Isles. The notoriusly wet stations Glenquoich, Gelncoe and Ardgour had
not a single fall throughout the month; a condition unprecedented throughout
the records at these places; the dryness was so acute that heather fires
were burning in some districts. Falls of more than 1 inch were measured
at numerous palces in the south of England on the 1st, locally in Wales
and the Midlands on the 25th and in south Scotland on the 26th.
Snow. The snowfall of the month was heavy in
eastern and Midland districts and over much of the country it lay throughout
the month. A foot or more of level snow lay in parts of Durham, Yorkshire,
Lincolnshire and the east Midlands by the 4th or 5th and, in many places
these conditions persisted with little change. For example at Ushaw
College, County Durham, snow was 15" (38cm) deep on the 5th, 22"
(56cm) on the 15th and 28" (71cm) on the 28th. At
Forrest-in-Teesdale, level snow lay 44" (118cm) deep on the 6th
and 53" (135cm) on the 18th. At Huddersfield snow was
20" (51cm) on the 5th, 25" (64cm) on the 12th, 15" (38cm)
on the 21st and 17"(43cm) on the 28th. At Waddington, Lincs, it
was 12" (30cm) deep on the 5th, increasing to 15" (38cm) on
the 22nd and 23rd, decreasing to 10" (25cm) on the 27th. The presistent
easterly winds, which were frequently strong, caused deep drifts and
great dislocation of traffic. In Scotland, on high ground in Angus,
up to 24" (61cm) of level snow was reported on the 8th, and in
south and east Scotland on the 25th-26th heavy snow, accompanied by
a south-easterly gale, caused deep drifts, which blocked main roads.
Sunshine. The month was very sunny in the north and
most of the west of Scotland and exceptionally dull in England and Wales,
the precentages of the average for the districts ranging from 36 in
England E to 146 in Scotland N. At stations with long records as far
apart as Kew, Falmouth and Aberdeen, it was the dullest February on
record. A number of stations also reported the longest run of sunless
days; at Kew there was no sunshine from the 2nd to 22nd inclusive.