NE 5-15 m/s, but 15-23 in the northwest part until early morning. Becoming dry in the south- and west but rain in the north and east until evening. Temperature 5 to 12 deg. C., mildest in the south part.
Forecast made 25.09.2016 01:01
NE gale in the northwest part until early morning with strong windgusts near mountains.
Prepared by the meteorologist on duty 25.09.2016 01:01
|3.1||24 Sep 01:11:30||Checked||229.8 km N of Kolbeinsey|
|3.0||24 Sep 00:36:00||Checked||274.8 km NE of Kolbeinsey|
|2.7||24 Sep 12:30:28||Checked||4.7 km N of Hábunga|
|2.6||24 Sep 06:14:32||Checked||150.8 km N of Kolbeinsey|
|2.5||24 Sep 00:48:37||Checked||149.2 km N of Kolbeinsey|
|2.4||24 Sep 10:11:20||Checked||4.3 km NE of Bárðarbunga|
Around 800 earthquakes were detected last week by the national seismic network of the Icelandic Meteorological Office. An earthquake swarm began in Hellisheiði on 17 September. The largest quake of the sequence was magnitude 3.6 on 18 September at 22:29; it was felt in many places in south Iceland and in the capital. Another earthquake of magnitude 3.2 occurred the same day at 23:32 and it was also felt in many places. In total, over 400 earthquakes were measured in the swarm. The largest earthquake of the week was magnitude 3.8 in Bárðarbunga caldera on 18 September at 20:42. Seven earthquakes over magnitude 3.0 occurred this week, four in Bárðarbunga and three in Hellisheiði. An earthquake of magnitude 0.8 was detected in Hekla on 12 September. More
|Jökulsá á Fjöllum||Grímsstaðir||209.2 m³/s||4.8 °C|
|Ölfusá||Selfoss||332.9 m³/s||7.2 °C|
Generally stable springsnow conditions in the mountains. Avalanche bulletins will not be released any more this winter unless special conditions develop in the mountains.
Written by a specialist at 27 May 17:45 GMT
The avalanche forecast is written for large areas and doesn't necessarily represent avalanche danger in urban areas.
In June 2016 a weather station was established on the upper reaches of Dyngjujökull, about 10 km north of the Grimsvötn caldera, at 1689 m above sea level.
A seismometer has been in operation by the IMO at the site since the
autumn of 2014 and the main purpose of the new weather station is to monitor conditions at this important location in the network, amongst the
volcanoes of Vatnajökull.
Heavy rainfall in the East fjords and heavy rain is forecast for the North. River levels are elevated due to rain, with the possibility of mud flows.
Heavy rain and discharge is forecast for Northern Iceland. Flash flows cannot be excluded.Checking on drainage near buildings is encouraged. Read more
8.9.2016: The level of Skaftá river has risen significantly. This suggests that a glacial outburst flood is in progress.
Hydrogen sulphide is released from the floodwater as it drains from the ice-cap and H2S is particularly potent at the ice margin (poisonous levels). Travellers must stay away from the edges of Skaftárjökull and Tungnaárjökull while the flood occurs.
Crevasses will develop rapidly around the ice cauldron, so travellers on Vatnajökull should stay away from the region.Read more
Since mid-June, there has been heightened earthquake activity in the Katla caldera. Summertime increases in caldera seismicity are an almost annual occurrence at Katla, often associated with the drainage of geothermal meltwater in the form of minor floods in glacial rivers from Mýrdalsjökull
These are not necessarily precursors to an imminent volcanic eruption.
Similar unrest has taken place at Katla several times since the 1950s
without culminating in an explosive eruption.
Travellers are urged to not spend time close to Múlakvísl, especially the upper reaches of the river, as measurements near to the source show unhealthy levels of hydrogen sulphide, signifying high concentrations of geothermal fluids.Read more
The 47th Nordic Seismology Seminar will be held in Reykjavík, 11-13 October 2016.
The meeting will commence on Tuesday in the early afternoon and last until Thursday evening.
Those who are interested in attending, are encouraged to apply for participation.
The eruption in Holuhraun in central Iceland in 2014 - 2015 was the largest seen in Iceland since 1783. The ice-filled caldera of Bárðarbunga central volcano collapsed during the eruption as 1.9 km³ of magma flowed laterally from a magma reservoir under the volcano. Eruptions of this type are not common. This caldera collapse is the first where it has been possible to carry out detailed observations during the events. Unique data was obtained that threw new light on the mechanism of caldera collapses and their interaction with the associated eruptions. A large team of scientists has analyzed the data from Bárðarbunga and published the results in the journal Science.Read more
HARMONIE is a numerical weather prediction model (NWP) that is non-hydrostatic and convection-permitting. It is operated at 2.5 km horizontal resolution over a domain that covers Iceland and the surrounding seas. At this resolution it is possible to simulate explicitly some processes that are important for clouds and precipitation as well as meteorological phenomena related to up- and downdrafts. In order to simulate the interaction between the atmosphere and the surface, the model takes into account different types of land surface as well as processes in and at the surface.Read more