Ragnar Heiðar Þrastarson

@RagnarHeidar
1.4K Followers
502 Following
365 Posts
Mapmaker, mountaineer and #GIS Coordinator of The Icelandic Met Office
GITHUBhttps://github.com/ragnarheidar
CODEPENhttps://codepen.io/ragnarheidar
SPONSORINGQGIS | OSGeo | Even Rouault

Today is world meteorological day #worldmetday 🌦️

DYK that the Icelandic Met Office has an API for weather observations. I´ve been having lots of fun building weather info screens for my new @trmnl
a brilliant little ePaper info screen

Our API: api.vedur.is/weather/

More on TRMNL: https://trmnl.com/

Check out public beta:
https://gottvedur.is/snjoflod/en/
Avalanche | Forecast

The Icelandic Meteorological Office publishes information on weather forecasts, severe weather warnings and weather observations for the public and emergency responders.

Icelandic Meteorological Office

Another milestone for us at Icelandic Met Office 🎉

This week we launched a new site with #avalanche forecasts and conditions, including recent avalanches. A major update was required in the background, migrating to #Postgres and building the APIs and of course the website handled by our friends at Origo & Metall with maps from MapTiler

November is my favorite time to look at #Sentinel2 images of Iceland. All the long shadows draw out the landscape is we are just about to hit the dark months in the visual spectrum acquisitions.

#iceland #glacier #remotesensing #copernicus

Before and after #flood

A pair of #Sentinel2 satellite images acquired on the 20th of August and 8th of September showing the lake where a glacial outburst flood aka #GLOF aka #Jökulhlaup occurred at the margin of #Langjökull glacier.

Check previous post for a short video from the field.

Throughout #Iceland the Icelandic Met Office operates small web cameras. These are co-located with other equipment like #GNSS and #Seismic stations. They are our eyes in the field. Some capture stunning #nofilter 24h time-lapse like this one looking West towards our old friend #Eyjafjallajokull

A nice #Landsat brightness temperature image from last night (ascending path). Data clipped to a union of all 9 lava outlines with the latest one on the right. Calculated from band 10 (level 1). Hotspots by the main crater and the thickest part of the lava field.

#NASA #USGS #Svartsengi #eruption

A few days ago, we had a glacial outburst flood AKA Jökulhlaup. The water originated from an ice dammed lake by Langjökull glacier. The flood did not cause any issues downstream, but its mechanics are interesting since water flows both beneath and on top of the glacier.
A short vid from the field 👇
https://youtu.be/W7p3Yjsy-tM?si=tk-9C43T5wUZJBX1
Hafrafellslón - jökulhlaup í ágúst 2025

YouTube
The most significant May heatwave ever recorded in Iceland | News | Icelandic Meteorological office

Icelandic Meteorological office

n May #Iceland was hit by a significant #heatwave

Several stations exceeded 20°C for 10 consecutive days 🔥

New record for maximum May temperature was set on the 15th, 26.6°C 🌡️

This is #EUMETSAT #MTG satellite images for those 10 days at 10 min interval (geo color image) 🛰️

More info in comment👇🏻