caldera
covered by 150- to 250-m-thick ice (Figure
1). Its highest peak, Grímsfjall, on the southern
caldera rim, reaches an elevation of 1722 m.
Volcanic eruptions there, numbering several
per century, are phreatomagmatic because
of the ice cover, and they usually persist for
days to weeks. Geothermal activity continu-
ously melts the overlying ice, and meltwater
accumulates in a subglacial
/media/jar/myndsafn/2005EO260001.pdf
and snow on higher ground, especially in the North. It is not possible yet to predict the actual path of the low-pressure and hence it is not possible to say which area of the country will be most affected.
Readers are encouraged to check the updated text forecast regularly. For the time being the forecast for the next few days is such:
On Thursday: Southerly wind 5 to 10 m/s and some rain
/about-imo/news/nr/2728
-DEM (5x5 m
spatial resolution with accuracy <2 m in elevation) was used as a reference map for co-
registering and offset-correction of the HRS-DEMs (40x40 m) and the DMA-DEMs (40x40 m
interpolated from 20 m contour lines). The average specific mass balance was estimated as
the mean elevation difference between glaciated areas of the DEMs. The glacier mass
balance declined significantly between
/media/ces/glacier_mass_balance_poster.pdf
gale or severe gale warning (average wind velocity 20 to 28 m/s) is in effect for all parts of Iceland today, and in Westfjords and tonight and tomorrow.
Weather forecast for the next 26 hours:
Today (Wednesday): East winds, 20 to 28 m/s with snow in the south and west part of Iceland, but later sleet and rain by the coast. East 18 to 28 m/s in the afternoon, strongest winds by the coast
/about-imo/news/nr/3093
Violent storm expected in the South
3.12.2015
A strong gale warning (average windspeed above 20 m/s) is effect in Iceland on Friday afternoon, and a violent storm (average wind speed, above 28 m/s) is expected in the southern
/about-imo/news/nr/3242
9th, lasting well into Saturday morning.
Wind speeds measuring 20 m/s and higher were recorded at half of the automatic weather stations in the lowland areas and similar speeds were recorded at 80% of automatic weather stations in the highland areas.
In the town of Heimaey in the Westman Islands, wind-speed* of 28 m/s and gusts measuring 45.8 m/s were recorded at the height of the storm, setting
/about-imo/news/nr/1732
A great storm passed over Iceland on Friday night, October 9th, lasting well into Saturday morning.
Wind speeds measuring 20 m/s and higher were recorded at half of the automatic weather stations in the lowland areas and similar speeds were recorded at 80% of automatic weather stations in the highland areas.
In the town of Heimaey in the Westman Islands, wind-speed* of 28 m/s
/about-imo/news/nr/1732/
in a gully below a shelf in the middle of the mountainside at approximately 340 m a.s.l. It flowed down the gully and onto a road above a recently constructed catching dam which is a short distance above the uppermost houses in the village. The avalanche hit the dam along a more than 50 m distance and left rocks and branches that it picked up on its way on the damside. It was approximately 2 m short
/about-imo/news/nr/3041
uses wind speed at an average height of 1.5 m, the typical height of an adult human face, based on readings from the national standard height of 10 m, which is the typical height of an anemometer. It incorporates heat transfer theory, i.e. heat loss from the body to its surroundings, during cold and breezy or windy days.
The table below covers the range of likely wind speeds and temperatures
/weather/articles/nr/1827