Includes all summits in the the northern half of Wales from Plynlimon northwards.
Snowdonia National Park
Saturday 29th February 2020
Last updated
Saturday 29th February 2020 at
7:34 AM
A complex weather situation. An early zone of rain and upland snow clears away eastwards, with cloud breaking widely. Then another area of heavy snow spreads in from the west into the afternoon. Wind speeds varied; least windy northern Scotland, but increasingly stormy across hills of England & Wales.
Upland gales increasingly stormy. Snow & hail showers, may set in.
Southwesterly; 30-40mph morning, but strengthening, to 50-60mph by midday or soon after, and abruptly 70-80mph across higher tops during afternoon.
Generally arduous conditions on the hills. Deteriorating to make any mobility difficult on higher terrain during afternoon. Severe wind chill.
Snow showers, risk setting in for a time.
Overnight snow & rain will clear by dawn. A few snow showers, but mid afternoon abruptly constant snow and whiteout for two hours or so. Perhaps briefly hail and chance isolated thunder. Rain only in and just above valleys. Very wet underfoot lower slopes following previous heavy rain; streams in spate or flood.
Forming widely in snow
Patches at dawn will largely clear, with most summits cloud free for several hours. However, anticipate abrupt deterioration from west middle of day as in precipitation fog quickly shrouds the hills.
30%
Patches of sun morning, particularly east Wales. Hazy before visibility becoming very poor or appalling in snow.
-3 or -4C. Where exposed to strongest winds, feeling close to -20C by afternoon on high tops.
600m, temporarily into afternoon lowering to 400m.
Snowdonia National Park
Sunday 1st March 2020
Last updated
Saturday 29th February 2020 at
7:34 AM
West or southwesterly 40 to 50mph; perhaps lower speeds for a time.
Risk of difficult conditions for walking; severe wind chill high tops.
Snow showers
Snow and hail showers sometimes frequent and heavy. Small risk thunder.
Extensive on higher areas
Cloud base will vary, though higher tops only fleetingly if at all clearing; generally between showers cloud base 900m, but patches near precipitation above about 450m.
30%
Bursts of sunshine and very good or excellent visibility - although temporarily very poor visibility in snow.
-2C
600 to 700m, lowest early in day.
Snowdonia National Park
Monday 2nd March 2020
Last updated
Saturday 29th February 2020 at
7:34 AM
Westerly, speeds varied (detail uncertain), occasional lulls, but often 25-30mph, risk at times 45mph.
Expect buffeting and significant wind chill across the hills; conditions may vary through the day.
Showers, snow on hills
A few showers spreading from west, snow or hail flurries on the hills, mostly rain lower slopes. May become frequent for a few hours western areas.
Often capping higher slopes
Cloud bases varied depending on extent of precipitation. Sometimes shrouding the hills for periods above 600-800m, lowest near west coast, and may often cover high tops. Breaks best toward east.
30%
Occasional sun, most common east Wales. Visibility often very good, but at times very poor if in snow.
-2C
500-600m, perhaps lower from dawn; may rise slightly further in afternoon.
Remaining cold into the start of March, with westerly winds generally prevailing. Scottish mountains staying sub-zero much of the time, whilst England & Wales will see periods of freeze and thaw, and snow more often confined to higher slopes. Precipitation remaining focused on western mountains. Lower terrain staying very wet underfoot. Wind speeds varied, occasional lulls, but also gales at times. Some indications of higher pressure into the second week of March.