UHI Mahara

Dr. Eddy Graham's Hebridean Weather Blog

by Dr. Eddy Graham

Excellent Spring Convective Cloud Example - April 14, 2014

During spring, the average sea surface temperature surrounding the British Isles is only about 7-10degC, which is very cool relative to the temperature of the land surface during the day (which may get heated by strong spring sunshine to 15 or 20degC).

This combination of supressed sea-surface temperature and increased land surface temperature causes air thermals to bubble-up quickly over land during daytime, leading to the familiar cumulus clouds ("cotton-wool puffs") of an April afternoon.

This phenomenon was displayed magnificently over Ireland, Wales, England and southern Scotland yesterday, 14 April 2014 - being captured by the US NASA MODIS satellite sensor in space, as it orbited over the UK and Ireland -see image below.


N.B. Note the clear skies over the seas, but bubbles of white cumulus cloud over most land areas.


Attached files:
14apr2014_MODIS-Terra_BI.png (1.6MB) - Download
Posted by Dr. Eddy Graham on 15 April 2014, 11:26 AM | Comments (0)

Warm, hazy spell to continue

it won't be wall-to-wall sunshine everyday during this coming week (Mon 31.3.14 onwards), but the reasonably settled spell of weather looks like continuing across the Hebrides and Isles.

Expect a little rain Monday night into early Tuesday, and again perhaps later in the week, but overall the breeze will stay in an east or south-easterly direction bringing much sunshine and warm conditions (temperatures could even reach well into the teens degC). It will remain hazy during the first part of the week, perhaps freshening up by the end of the week.

Eddie, Stornoway, 30.03.2014

Posted by Dr. Eddy Graham on 30 March 2014, 10:52 PM | Comments (0)

Spring sunshine on the way (at last!)

At long, long last, some glorious spring sunshine is likely on the way later this week... but not after a short "hiccup" of an interruption Monday/Tuesday...

From Tuesday/Wednesday onwards, I am expecting fine weather, offshore easterly winds and glorious sunshine for a few days at least. Hopefully, this should brighten everyone's spirits, especially after us having to endure such dastardly weather for the past 4-5 months - it has even put grey hairs (..ahem blonde..?) on many a meteorologist's head... :)

Note on Today's "Sunday Snowflakes": Yes indeedy, a veritable whirl of Mother Nature's confetti blew down upon us for a few minutes this morning - but it's hardly worth a second-mention, as the rest of the day was fine and sunny, although the north wind stayed cold and treacherous. Here's a pic of the view from Gress Beach this afternoon by Eddie (23/3/2014):

Eddie, on World Meteorological Day 2014

Attached files:
tn_2014-03-23 14.53.13.jpg (66.1KB) - Download
Posted by Dr. Eddy Graham on 23 March 2014, 9:59 PM | Comments (0)

Wind speeds and Rain Totals for Wednesday

It was one of the wettest 24 hours in March in Stornoway for many years, with a total rainfall of 32.2mmm (1.27in). And wettest of all in the Hebrides was Lusa bridge (near Broadford) on Skye with 46.0mm (1.80in).

Max wind gusts were, as expected, 61mph at both Stornoway and South Uist.

There were intermittent power cuts during the evening across many communities.

Eddy, 10h05, Thursday 20 March 2014

P.S. Focus is now on much colder weather for a couple of days with snow flurries

Posted by Dr. Eddy Graham on 20 March 2014, 10:08 AM | Comments (0)

Severe gales Wednesday & Thursday

Update (Wed 11h30): I'm still expecting a strong gale to develop later today (this evening and overnight till the early hours of Thursday), accompanied by heavy rain. Gusts to 60mph are still possible. Snow and soft hail showers will follow by early Friday, but any snow is unlikely to be persistent or lie for long (except on hills).

Original Post (of Tuesday) continued...:

Another severe southerly gale is likely to pick-up through the Minch tomorrow (Wed) - average wind speeds may reach severe gale force 9 (or possibly even storm force 10 briefly), with gusts 60-70mph. Later Wednesday night into Thursday, the winds will die back temporarily, before veering southwesterly to westerly and increasing again during Thursday, with more severe gales off the Butt of Lewis.

Heavy rain is likely too, with the weather turning much colder from Thursday onwards as winds further veer northerly (but easing considerably), and snow could be seen right down to sea-level by Friday in many places.

Eddy, Stornoway, Tues. 18/3/2014

Posted by Dr. Eddy Graham on 18 March 2014, 2:34 PM | Comments (0)

A windy week ahead (esp. Thurs), then cold & possible snow for next weekend

With timely equinoxial gales, March has roared in like a lion recently... and whilst the anger will continue for a few more days yet (esp. Thursday coming, 20th),  softly flakes of snow and hail will usher in a much quieter and colder spell of "lambing weather" by next weekend (22-23rd March).

Of course, it's all no surprise really - in most winters when January and February are mild & stormy, there is a strong likelihood of snow and frost arriving after St. Patrick's Day (17 March) and continuing into early April.

So beware! Winter is not over yet... it may only just have started!

Happy St. Patrick's Day to One and All!

Eddie Stornoway, 17 March 2014.



Attached files:
tn_IMG_0881.JPG.1 (41KB) - Download
Posted by Dr. Eddy Graham on 17 March 2014, 9:07 AM | Comments (0)

St. Kilda makes a wave in the clouds!

The wake of St. Kilda was apparent in the low-cloud that was sweeping in from the south-west over Hebridean shores this afternoon. In much the same way that a boat moving through calm water leaves a wake of "herring-bone" waves... St. Kilda (an isolated island 56 miles west of North Uist, Outer Hebrides, Scotland) was leaving a wake in the clouds moving downstream (downwind) from the island.

From a meteorological point-of-view, stable meteorological conditions associated with high pressure, and low cloud with a top not much higher than the highest point on the island (430m), caused this phenomenon. Look at the arrow below to see the start of the wave train, moving northeast from the island (which is hidden beneath the cloud). Now you know from where Harris Tweed got its herring-bone pattern!

Image Courtesy NASA Terra, Eddy, 12/3/2014, Stornoway

Attached files:
12mar2014_st-kilda-waves.png (1.2MB) - Download
Posted by Dr. Eddy Graham on 12 March 2014, 6:44 PM | Comments (0)

Another satellite image beauty

The NASA satellite sensor MODIS took another beautiful image of Scotland this morning, under mostly clear skies.

Green = Land

Black = Sea

White = Cloud

Cyan = Snow or Ice

Eddy, 12/3/2014

Attached files:
12mar2014_HI_MODIS-Terra_.jpg (32.3KB) - Download
Posted by Dr. Eddy Graham on 12 March 2014, 2:40 PM | Comments (0)

A windy Saturday

It was certainly a windy day last Saturday (8th March) - which caught a few people on the hop, not just meteorologists!

What made it worse was the timing of the peak in windspeeds between 2pm and 4pm, at the height of the Saturday afternoon shopping / activity time.

Meteorological speaking, it was a "meso-scale" phenomenon of "wind-funnelling" up the Minch, due to a "stable" airflow situation (i.e. in layman speak, that means the wind was funnelled up the Minch between the mountains of Skye, Harris and the mainland).

Max gusts as follows:

Stornoway Airport: 67mph

South Uist: 68mph

Loch Glascarnoch & Aultbea (Wester Ross): 65mph

Eddy, 12/3/2014

Posted by Dr. Eddy Graham on 12 March 2014, 2:35 PM | Comments (0)

A few days of fair weather... then cold blasts to return

Although we'll have a few days of fair weather now (though not always sunny in the Hebrides, some occasional drizzly smirs of rain at times).. it's likely to turn colder again by the weekend with chilling winds blasting in, bringing hail & snow flurries again on the hills... so don't get complacent... it is March after all!

Eddie, Monday 10/3/2014, 3:25pm (a beautiful NASA Terra image of the Highlands and Islands today below)

Attached files:
STA60040.JPG (318.2KB) - Download
ScreenShot001.jpg.1 (157.6KB) - Download
Posted by Dr. Eddy Graham on 10 March 2014, 3:21 PM | Comments (0)

Adora la Aurora

The best show on Earth is free... and after endless weeks of rain, Mother Nature came to say "a wee sorry" last night, rewarding us with a magnificent Aurora Borealis (or Northern Lights) display.

Locals on Lewis are saying it was the best display since 2003 - it certainly looked like it!

(NASA image)

And here's a link (below) to a time-lapse movie loop of the lights, as seen from Eoropie Tearoom, Isle of Lewis (Scotland) last night (about 20 miles north of Stornoway ATCF). From Stornoway, where light pollution is greater, the colours were perhaps milkier/whiter, but the display was still very impressive, as seen even from the town centre. The waving and oscillating "curtains" of the aurora are clearly visible in this sped-up movie (the lines show the geomagnetic field lines of the Earth), but the highest frequency "pulses" of light (which seemed to last a few tenths of a second) are filtered out.


Eddy, 28/2/2014

Attached files:
Jokusarlon1_2000.jpg (610KB) - Download
Posted by Dr. Eddy Graham on 28 February 2014, 10:01 PM | Comments (0)

As more rain falls, the snow continues to tumble on high...

The very wet winter weather this year looks like continuing, with yet more heavy rain for much of the coming weekend. Localised flooding is expected in places, particularly SW & W Scotland.

But whilst all this rain has been falling on our soggy lands, up high on the mountains and munros, huge quantities of snow have fallen over the past 3 months. As of today (21 feb 2014), an astonishing 470cm (nearly 5 metres of level snow) is reported from Glencoe, with 300cm at Cairngorm. So certainly it's a skier's paradise up there at the moment... well, only if the Sun would come out!

A temporary thaw of some of this snow from lower mountain slopes is likely this weekend, however, and when combined with the expected heavy rain,  it will increase the risk of flooding in some places.

A recent BBC news item on the extraordinary snow depths on the Scottish mountains can be read here: http://news.bbcimg.co.uk/media/images/72626000/jpg/_72626643_snowsais.jpg

The daily Glencoe snow report can be accessed at: http://www.snow-forecast.com/resorts/Glencoe/snow-report

The Cairngorm mountain snow report can be accesed at: http://www.snow-forecast.com/resorts/Cairngorm/snow-report

Eddy, 21 Feb 2014


N.B. Total rainfall in Stornoway town (36hrs from Wed 19 Feb 8:30pm to Friday 21 Feb 8:30am: : 30.8mm (1.21in). Expect nearly as much again this coming weekend.

Attached files:
GOPR2854_zoom.JPG (476.8KB) - Download
Posted by Dr. Eddy Graham on 21 February 2014, 12:47 PM | Comments (0)

The Great Irish Storm of 12 Feb 2014

On 12th February 2014, parts of Ireland endured the most severe wind storm since "Hurricane Debbie" of 16th September 1961.

The worst effected areas were Munster and south Leinster), where windspeeds widely exceeded those of the last Great Storm of Christmas Eve 1997*, with full hurricane force (Category 1) winds being recorded at Mace head (Co. Galway).

Some of the notable features of the storm were as follows:

  • Mace Head recorded a mean 10-minute wind speed of 65kts (Hurricane Category 1 on the Saffir-Simpson scale).
  • The maximum gust of 86kt recorded at Shannon Airport was the highest since Hurricane Debbie in 1961.
  • Shannon also recorded a 10-minute mean wind speed of 61kts, its highest since records began there in 1939
  • Kinsale Energy Gas Platform (off Co. Cork) reported a maximum wave height of 25m in the afternoon, the largest ever wave recorded in Irish waters.

A full report from Met Eireann on the storm is available here.


A nice report on the storm's effects in Killkenny is given by Niall Dollard at KilkennyWeather.com

A fairly typical video that shows the full power of the storm at Tralee can be seen here.

*N.B. I will never forget the Christmas Eve storm of 1997, for I was the sole forecaster on evening duty in London, and the previous duty forecaster (the manager) missed the mesoscale development of the storm completely... So when I saw Valentia jump 23hpa/3hrs early that evening, I knew Munster/Leinster were in for a hooley to remember (and later N Wales, N England). I had to update all the forecasts urgently, and was quoted by  the Press Association as saying "People will die!" (Sadly, I was correct).  

Today, I actually get my met students to draw the weather chart from the synops of that day as an exercise in one of my classes - so some good has come out of the story in the end.


Original post of 12 Feb 2014 (below):


I have checked my records, and I believe Shannon Airport's (03962) max wind gust this afternoon of 86 knots is the highest at the station since the "Hurricane Debbie" storm of 16/9/1961.

Shannon Airport is an established meteorological station in Ireland and has (I believe so) a fairly homogenous wind record stretching back to 1939.

I rooted out all my old Monthly Weather Bulletins from the loft this evening, and here are the various records over the past 20-50 years):

  • 16/9/1961: 93 knots (note the palindromic date!)
  • 9/2/1988: 80 knots
  • 4/1/1991: 75 knots
  • 8/12/1993: 70 knots
  • 24/12/1997: 83 knots
  • 26/12/1998: 72 knots
  • 12/2/2014: 86 knots

Hence I believe today's max wind gust is the highest at the station since that infamous and remarkable day in 1961. This is certainly of note.

As I type, reports are still coming in of major disruption across counties Galway, Cork, Clare, Kilkenny and elsewhere. Remarkably, there are no reports of lives lost (yet): the "weaker" storm of 4/1/1991 was responsible for 14 deaths alone in Ireland.

And here's a satellite image (see above, courtesy EUMETSAT) of the storm at its peak this afternoon. I believe the banded structure in the cloud tip (where it looks like a bit like a scorpion's tail curled upon itself) is CISK ("Conditional Instability of the Second Kind"), otherwise known as "slantwise convection". This type is thought to help form a "sting jet" and the most extreme winds (Browning, 2004).

Eddie Graham Stornoway, Scotland


Browning, K. A. (2004). The sting at the end of the tail: Damaging winds associated with extratropical cyclones. Quarterly Journal of the Royal Meteorological Society130(597), 375-399.

Attached files:
BgSfL4ECYAEd1aj.jpg (63.8KB) - Download
Posted by Dr. Eddy Graham on 12 February 2014, 8:50 PM | Comments (0)

Cailleach na Mointeach with a Silver Breast

I took the following photos of Cailleach na Mointeach ("the old lady of the moor" - turn your head sideways to see her face & prominent nose) and the snow-capped Harris hills over the weekend - altogether making some of my favourite shots of Hebrides recently.

A silver-faced and silver-breasted Cailleach na Mointeach, after a recent dusting of snow.


The Clisham looks superb and Alp-like under a fresh white mantle.

Loch Bun na Abhainn Eadra looks a pristine aqua-blue, underneath the snow-capped harris hills.

The Sun "drawing water" over the Lewis peatlands and the view across to the Harris hills.

E. 10/2/2014

Attached files:
08feb2014_Cailleach-na-Mointeach.png (804.7KB) - Download
08feb2014_clisham_snow-covered_from_Ardhaisaig.png (1.4MB) - Download
08feb2014_2014-02-08 12.01.48.jpg (1.3MB) - Download
sun-drawing-water5.png (2.2MB) - Download
2014-02-09 15.29.17.jpg (2.2MB) - Download
Posted by Dr. Eddy Graham on 10 February 2014, 5:27 PM | Comments (0)

Outlook for week ahead 10-17 Feb 2014

The weather pattern will be staying very disturbed for all parts of the British Isles this week. Another major storm looks set to cross Ireland and the southern UK on Wednesday with wind gusts to 80mph. But as the "eyes" of the various lows will remain anchored near the Hebrides, less windy and occasional brighter spells of weather may occur here- though all parts remain at risk from strong winds, gales, heavy rain at times this week. Further flooding is almodt certain to result.

Tuesday: A short spell of sleet and wet snow is likey during Tuesday over the Highlands of Scotland, with disruption on high-level routes such as the A9. But most coasts should stay clear.

Wednesday: Another major storm passes over Ireland, Wales and central/northern parts of England

Rest of week: More rain, chill and strong winds likely.

Eddy, Mon. 10 Feb 2014, 5:15pm



Posted by Dr. Eddy Graham on 10 February 2014, 5:18 PM | Comments (0)

A further week of storms for Ireland, England, Wales ahead: But Hebrides to miss most.. and even a touch of Spring!.

On RTE news 3/2/2014 (the Irish national broadcasting corporation), the Taoiseach of Ireland (equivalent to Prime Minster) Mr. Enda Kenny said "The damage due to the recent flooding is unprecedented".

Indeed, this may be so for many coastal communities of Wales and south of England as well.

And it looks like the weather situation will only get worse during the rest of this week... with a further series of very powerful storms (of sub-944hPa category) expected to pound these regions.

As for the Hebrides: We'll largely escape, and although air pressure will remain extraordinarily low (as it has been all winter), frequent easterly winds will prevent too much rain from falling on the Isles...indeed, with the longer days now and a higher and stronger Sun, there'll even be a a "touch of Spring" about the weather for a few days yet...

Eastern and Southern Scotland, together with North Sea coasts are at a greater risk of heavy rain and storms too, however.

Eddy 3/2/2014 

Eddy's Updated Forecast, as of Friday 7/2/104, 2pm: Much the same pattern of weather continuing for the next 5 days. Another big storm will sweep into Ireland and SW Britain on Saturday, yet another storm next Tuesday too. Here in the Hebrides, still some nice early Spring sunshine for a few days yet, then one day rain, one day shine is the best description. Staying chilly, risk of occasional sleet flurries but no significant snow, except on the mountains.

Posted by Dr. Eddy Graham on 03 February 2014, 8:44 PM | Comments (0)

High tide & floods at North Beach/Bayhead, Stornoway

The high tide this morning (07-08h, Sat 1st Feb 2014) came streaming over the Stornoway Harbour quayside  - resulting in flooding of North Beach, Perceval Square and parts of Bayhead. But thankfully, it seems no properties were flooded.

Expect a repeat again tomorrow morning, and it could be slightly worse as a fresh WSW wind will pick up again, making larger waves.

Below a selection of pics and videos (please ask Eddie if you would like to use them).

I made a short video of the water rushing through Perceval Square onto North Beach too: http://youtu.be/HGrepUBSjwE

Eddy, 1/2/2014, 10h15

Attached files:
tn_2014-02-01 07.24.41.jpg (67KB) - Download
tn_2014-02-01 07.23.46.jpg (77.5KB) - Download
tn_2014-02-01 07.44.02.jpg (78.3KB) - Download
tn_2014-02-01 07.10.29.jpg (41.3KB) - Download
tn_2014-02-01 07.25.40.jpg (51.4KB) - Download
tn_2014-02-01 07.59.45.jpg (43.3KB) - Download
tn_2014-02-01 07.58.31.jpg (42KB) - Download
Posted by Dr. Eddy Graham on 01 February 2014, 9:25 AM | Comments (0)

High tides, low air pressure and a general meteorological melee...

Yes, a meteorological melee it certainly is...

There's a risk of a high tide up to +6.0m in Stornoway early this Saturday and Sunday mornings.... I'll be posting updates on twitter...

Snow over the Central Highlands today and tomorrow too, and a biting cold and strong south-east wind at first, veering westerly... but just rain for the coasts and Isles...

The worst of the waves and strong winds will stay south over Ireland and western England/Wales, infact there will be little wind tomorrow (Sat) as the eye of the low will pass over the Hebrides - but the wind will pick up again on Sunday (pm). But the very low atmospheric air pressure will still rise the tide significantly above an already high astronomical tide...

Rest of weekend, next week: Staying very unsettled with further heavy rain and gales... risk of more storms early next week, I'm afraid!

Eddy, Fri 31/1/2014, 9:15am, updated 17h45

p.s. Please check my twitter feed for all the latest info https://twitter.com/eddy_weather


Posted by Dr. Eddy Graham on 31 January 2014, 9:17 AM | Comments (3)

Chilly weather to continue: Now risk of sleet & ice

After yesterday's gale and torrential rain (see previous post), the focus is now switching to much colder weather bringing an increasing risk of sleet, ice and heavy snow (for high ground). A raw and bitter wind is likely mid-week, so please wrap-up warm as the weather will remain treacherous - like your worst enemy!

But on the plus side - some brighter spells of sunshine appearing in-between the cold east to south-east wind too.

Posted by Dr. Eddy Graham on 27 January 2014, 9:27 AM | Comments (0)

Max wind gusts and rainfall amounts: Sun 26th Jan '14

As expected, it blew a wee bit of a hooley yesterday... max windspeeds weren't record breaking by any means, but the duration of the gale (for 16-20 hours, from early in the morning right through 'till nearly midnight on Sunday night) was notable. Max gusts from around the Celtic fringe were as follows:

Stornoway:  65mph

South Uist: 81mph

Bealach na Ba (above Applecross): 93mph

Tiree: 68mph

Mace Head (Ireland): 81mph

The rain was also very heavy. No records broken, but still some impressive totals:

Stornoway (in 36 hours): 38.5mm (1.5 inches)

South Uist: 20.0mm

Skye (Breakish): 46mm (1.8 inches)

Tulloch Bridge: 42mm

Glasgow: 26mm

Eddy, 27/1/2014


Posted by Dr. Eddy Graham on 27 January 2014, 9:23 AM | Comments (0)

Lightning strike on house in Bernera

December 2013 was one of most stormy of months of recent decades in Stornoway.

As well as the record breaking rains (see my earlier blog posts) and frequent storm-force winds, there was an usually high incidence of thunder and lightning during the month - far above the long-term climatological average for Northern and Western Scotland. A total of 5 days of thunder and lightning were recorded in Stornoway during the month (the average is about 1 thunderstorm every 5 years i.e. December 2013 had 25 times more lightning than an average December!).


A consequence of all this lightning was some damage to houses and property - The West Highland Free Press reported a house on the Isle of Skye being destroyed during the Ball Lightning storm of 15/16 December, a further storm on 19 December severely damaged a house on Bernera, Isle of Lewis. Here are the details from the house owner, with whom I have corresponded directly by email:

"Our house got struck around midday on Thursday 19th December and by all accounts it was a tremendous flash! My younger son was the only person at home at the time and he got hit on the head by a small piece of shattered BT box which flew off the wall. The really lucky guy was my neighbour David who was walking across the Valasay Bridge towards the mobile library. Fortunately he did not have his hands on the rail as the bolt came over the bridge via the BT cable!!

We ended up with a great big hole in the roof and a chimney that is only 2/3 of what it was. The major headache is the electrics which have been goosed. The entire house will have to be rewired.

According to the driver of the Mobile Library who was parked at the Valasay Bridge, there was a spectacular explosion of roof slates and this would explain why there are shards of slate spread very widely around the garden! The builders have arrived now and are about to start repairing the chimney."

Why were these strikes so powerful? Well, Eddy writes "these lightning strikes from winter thunderstorms (such as those which prevailed across the Hebrides during December 2013) are the most powerful of all strikestypically having a voltage 10 times greater than those more common over the continent and inland parts of the UK during the summer. This is because  winter storm clouds have a much higher percentage of ice crystals, snow and hail than their summer counterparts, leading to a greater build-up of electric charge".

Eddy, 23/1/2014


Attached files:
nasa-lightning.jpg (4.3KB) - Download
tn_WP_20131220_001.jpg (17.5KB) - Download
tn_WP_20131220_002.jpg (16.5KB) - Download
tn_WP_20131220_008.jpg (19KB) - Download
tn_WP_20131220_012.jpg (33.6KB) - Download
Posted by Dr. Eddy Graham on 23 January 2014, 10:23 AM | Comments (1)

Return of winter in coming few days...

The non-descript weather pattern  of recent weeks is finally beginning to break down - and it seems likely now that an active "westerly" flow will resume by this coming weekend (Burns' Day, Sat. 25th January) onwards... there's a chance of another sizeable storm passing across the British Isles Sunday 26th /Monday 27th, bringing heavy rain and gales (see US Fleet and Navy Model prognoses below), before much colder air sweeps in from the north and north-east, increasing the chance of snow falling at low-levels by early next week.

Current forecasts (as of Thurs 23/1/14) indicate that Lewis and Hebrides will  escape, with the worst of the storm affecting western / northern Ireland and S. Scotland.

Most of the snow looks likely to fall across northern and eastern parts of Scotland and Northern England -  temporary blizzard conditions are possible across high-level parts of Caithness, Sutherland, Speyside, Aberdeenshire, Perthshire and the Borders (so please take advance notice!) but the Hebrides will probably escape!

N.B. This Thursday morning, as predicted by Eddy, snow has been falling across N & W of Scotland (including Lewis) but it won't last long... it'll be gone by tonight.

Eddie, 21/1/2014, 10h10

Attached files:
nvg10.thk.132.europe2.gif.1 (42.8KB) - Download
Posted by Dr. Eddy Graham on 21 January 2014, 9:58 AM | Comments (0)

Still no sign of any snow, nor further storms

Well, it's already well into January.... but there's still no sign of any significant snow on the horizon, at least for low-lying parts of Scotland. Instead, it looks like staying mostly unsettled with frequent spells of rain or sleety showers - but nothing particularly unusual. 

Having said that - the mountains and Munros will continue to see appreciable falls of snow (especially above 3,000 feet or 900m) over the coming week - so good news for any skiers or winter snowsport enthusiasts.

Thankfully, there are no signs either of any repeat of December's storms. 

Frost frequency (which has been very low so far this winter) may increase towards the end of the coming week though, but nothing too cold no inconvenient.

Eddie, 15/1/2014

Posted by Dr. Eddy Graham on 15 January 2014, 12:43 PM | Comments (0)

North American cold air to visit us for 1 day

It's interesting but hardly noteworthy - the extremely cold air that has caused the recent North American cold snap is currently spreading east from Canada across the Atlantic. Met models are currently predicting it will reach Scotland this Saturday 12th January 2014.

But don't get excited or worried, because as it crosses the ocean, it will warm up immensely (due to heat exchange from the warm sea water beneath), and by the time it gets here it will have warmed by an extra 20 or 30degC. This means that air temperatures in Scotland will remain mostly above freezing (though with a risk of some ice by night). Expect hail, sleet and the odd snow flurry as a result too.

Later next week, some more substantial cold air may arrive from the continent and Scandinavia - a source region that is much closer to home - so the chance of more widespread snow is possible therereafter, especially in southern and eastern parts of the country.

E.G. 8/1/2014

p.s. Toronto's air temperature of -24C (-11F) yesterday was just above the record low of -26.9C (-16F) set in 1968. So, US & Canadian friends, please stay warm!

Posted by Dr. Eddy Graham on 08 January 2014, 9:38 AM | Comments (0)

Huge waves and flooding at Lahinch, Ireland

It was in picturesque town of Lahinch, county Clare (Ireland) that, as a young child, some of my first memories come from - I recall my father driving with us out to Lahinch beach for a day trip from nearby Shannon (where we lived) in the early 1970s.

Alas, the town has taken a massive battering during the past week's dreadful weather; a combination of high astronomical tides, very low atmospheric air pressure (making the sea-level rise up), a very unusual fetch of wind from the mid-Atlantic (where the deepest "lows" have strangely settled), and also a smaller but ever-increasing contribution from rising sea-levels due to global warming - have all conspired to cause this misery.

Incredible and terrifying video of the sea crashing onto, and flowing down a street in Lahinch:


Photographs of the battered promenade by George Karbus:




When will it end? Will it get worse? ... From a scientific point-of-view, one thing seems certain: Previously very-rare events are becoming more common, and if sea-levels continue to rise due to global warming, such events may become more common (and widespread) later in the 21st century.

Eddy, 7/1/2014




Posted by Dr. Eddy Graham on 07 January 2014, 9:41 PM | Comments (0)
Comment removed
Comment removed by the owner |
Comment removed
Comment removed by the owner |
Comment removed
Comment removed by the owner |
Comment removed
Comment removed by the owner |