Posts Tagged ‘SMHI’

The year when “hot air avoided Sweden with uncanny precision.”

September 5, 2012

One summer (or one winter) does not a climate make – but ……..

The Swedish Meteorological and Hydrological Institute (SMHI) has posted its summary of the 2102 summer.

In summary, one can say that the summer of 2012 was the year when “hot air avoided Sweden with uncanny precision.”

The summer of 2012 was not one of the wettest and coldest, but was probably still a disappointment for most vacationers. There was not a single extended period of warmth, sunshine and clear blue skies throughout the summer. It is twelve years since it happened last. Previously, this type of summer occurred more frequently. 1987, 1993, 1998 and 2000 are examples.

Otherwise, there was absolutely no shortage of hot air over the Northern Hemisphere. But it avoided Sweden with uncanny precision.


The big freeze: Sun and wind and clouds – not climate scientology or carbon dioxide

February 8, 2012

We have been down to -22°C over the weekend and it’s -10°C today. The cold spell is likely to last another 10 days or so. There are few clouds and day time temperatures are 10+°C higher than at night.

It’s only weather of course but a timely reminder that – anywhere in the world –  daily temperature variations are of the order of 10-15 °C and seasonal variations every year are of the order of 30 – 50 °C. And this variation is entirely due to the effects of the sun and the winds and the cloud cover. The effects of carbon dioxide and climate scientology are insignificant. But it’s only weather.

An extract from the Swedish Meteorological and Hydrological Institute (SMHI) for 4th February makes the point:


All of Sweden has had it much colder than normal for the season. 

In parts of northern Norrland it was more than 20 °C colder than normal. It was coldest in Kvikkjokk-Årrenjarka in Lapland with a temperature of -42.7 °C, which is the lowest temperature recorded there since surveys began in 1888. It was 25°C colder than what is normal for the season where “normal temperature” means the average daily temperature between the years 1961-1990. 

The reason for the extreme cold was the northern and easterly winds in combination with very clear weather. Without any insulating cloud cover night-time temperatures plummeted.

For the country as a whole it was a fairly even distribution of about 20 °C colder in the north to over 10 °C colder than normal in southern Götaland. At the Norwegian border, with Lakes Vänern and Vättern and along the Östergötland and Småland coast, it was between 8 and 10 °C  colder than normal. It was mildest in southern Öland, with temperatures of only 6 to 7 °C lower than normal.

Sweden temparature anomalies on 4th February 2012 - SMHI

Spring is here and so is the snow!

March 18, 2011

The official definition of Spring in Sweden is when the average daily temperature exceeds 0°C for 7 days in a row. This was the picture on 14th March (blue indicating temperatures below zero, yellow for temperatures currently above zero and green for regions where spring had arrived with 7 consecutive days with average temperatures above zero). The headlines were celebrating the arrival of spring.

Arrival of Spring in Sweden

Årstidskarta, 2011

Arrival of Spring in Sweden 2011-03-14: map by SMHI

Yesterday it felt almost spring like with bright sunshine through the temperature was only 3 C°. The snow and ice from the winter were melting away and it was time to sweep away the gravel and sand laid down at various places through the very cold winter.

But the view from my window this morning has brought us crashing back to reality >>>>>>>


Finspång, 0800 18th March 2011: image k2p


Baltic sea ice highest in 25 years

February 26, 2011

From The Local:

Baltic Sea: image Wikipedia

Deep freeze puts Baltic on track for record ice

Following another extended stretch of sub-zero temperatures, ice coverage on the Baltic Sea is greater than it’s been in nearly a quarter century, Sweden’s meteorological agency reports. About 250,000 square kilometres of the Baltic Sea are now covered in ice according to the Swedish Meteorological and Hydrological Institute (SMHI).

The last time so much of the Baltic was frozen was the winter of 1986-87, when ice covered nearly 400,000 square kilometres of the sea’s surface.

SMHI warns that ice coverage on the Baltic could expand further in the coming days, possibly setting a new record. “The surface water is cold and if winter-like temperatures continue in the region a few more weeks, we’ll probably get an icy winter on par with 1984-85, one of the toughest winters in the 1980s,” SMHI oceanographer Amund E. B. Lindberg said in a statement.

According to SMHI’s estimates, ice may eventually connect the Swedish mainland all the way out to the Baltic island of Gotland, which lies about 90 kilometres off of Sweden’s eastern coast.

Baltic ice cover is not only unusually wide this winter, but also unusually thick, especially in Gulf of Bothnia off Sweden’s northeastern coast, where air temperatures have consistently hovered around -30 degrees Celsius in recent months.

In some areas far out at sea, ice is more than 60 centimetres thick in the northern parts of the gulf. Recent cold temperatures near the southern areas of the Gulf of Bothnia have resulted in ice thickness growing by 30 centimetres in just two weeks.

Icebreakers from the Swedish Maritime Administration (Sjöfartsverket) have been working round the clock to ensure that sea routes on the Baltic remain open, but strong winds expected at the weekend may complicate their work.

SMHI’s daily ice report says:

During the next two days  heavy ice drifting and ridge forming is expected in all waters of the Baltic Sea north of N58 °.

A detailed sea ice map is available here:

Baltic Sea ice levels 20110225: image smhi

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