After days of rain, enormous amounts of water are slowly but surely flowing down waterways in Eastern Norway.
On Saturday evening and Sunday there will be thunderstorms that characterize the areas that have been hardest hit by floods and landslides after the extreme weather “Hans”, but it is uncertain how powerful the showers are and exactly where they hit.
This is explained by meteorologist Siri Wiberg at the Meteorological Institute to Dagbladet.
– The water is still rising
– Right now it seems that it is hitting Innlandet, but also Viken in the areas that make up the old Buskerud county. We would most like to have a stay now, but it won’t be like that at all, says Wiberg to Dagbladet early on Saturday evening.
The storm will probably continue through the night and through Sunday, the meteorologist explains. However, the showers do not look very scary, she emphasizes.
– It seems that they may have the potential for 10-15 mm of rain, so in that sense it is not too bad. But if the showers are stagnant for a couple of hours, they can cause more mischief.
Danger warning still in place
In several parts of the region, the flood will still cause problems, explained NVE section manager, Øyvind Leirset, to Dagbladet on Saturday morning.
– Now some time has passed since the rainfall came, and it is now in the lower and large waterways that there are flooding problems.
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The Norwegian Watercourses and Energy Directorate (NVE) maintains a flood warning at red level for the Drammensvassdraget and for the lower parts of Glomma. This was stated by NVE in a press release Saturday afternoon.
– The Tyrifjorden can rise by around 30 centimeters more from the level it had on Saturday morning, says flood watcher Erik Holmqvist here.
On Saturday afternoon, Tyrifjorden was at orange level. The measuring stations in the Drammensvassdraget at red level have already reached the flood peak or leveled off.
Here the flood hits:
The Drammensvassdraget
The flood peak has been reached in most places in the watercourse, but the water level is still rising in Tyrifjorden.
Krøderen: The water level culminated on Thursday afternoon at a red level in Krøderen. The water level is now on the way down.Sperillen: Friday morning at 10 the water level in Sperillen was 154.1 m. The water level seems to have reached the flood peak. Randsfjorden: Friday at 12 noon the water level is 136.1 m. The water level will continue to rise by just under 0.1 m until Saturday. Tyrifjorden : Friday at 12, the flood water level is 64.9 m. The flood water level can rise approx. 0.6 m towards the flood peak which is expected on Monday. Storelva in Hønefoss: On Friday the water flow is in excess of 1200 m3/si Storelva. No major changes in the water flow are expected now, but it will remain at a high level throughout the weekend.Bagn in Begna: The flood is the largest since measurements began in the 1940s. The flood peak in Bagn culminated on Thursday. On Friday, the water flow is still at the red level and somewhat decreasing, but will be high for several days to come. Mjøndalen bridge: The water flow in the Drammen river has culminated during the night to Friday at the orange level. The water level at Mjøndalen bridge is approx. 3.1 m, and is expected to be high in the days ahead.
Glomma and Lågen
The flood is still rising in Mjøsa and Øyeren. The flood peak has been reached for the small and medium-sized waterways, as well as Gudbrandsdalslågen upstream of Mjøsa.
Lågen: The water flow at Losna culminated at a red level on Thursday. On Friday morning, the water flow is down to the orange level. Mjøsa: The water level may rise approx. 0.3-0.4 meters more, from the level on Friday at 3pm at 124.9 m above sea level. This corresponds to approx. 125.2-125.3 m. on Saturday or Sunday. The water level will remain at this level for several days. This corresponds to a high orange level. The forecasts are uncertain. The flood near Elverum culminated on Thursday morning in approx. 2230 m3/s, which corresponds to the orange level. On Friday morning, the water flow at Elverum is at a yellow level. Rånåsfoss: On Friday afternoon, the water flow at Rånåsfoss is 3470 m3/s, and is expected to rise to 3600 m3/s during Sunday. Øyeren v/ Mørkfoss: The flood may rise approx. 0.9-1.2 meters more, from the level on Friday at 3pm of 102.8 m above sea level. The water level will then culminate on Sunday or Monday at a level between 103.7 m. and 104.0 m. The forecasts are uncertain. Downstream of Øyeren (Solbergfoss): The water flow is expected to reach approx. 3350 m3/s on Tuesday.
(NVE)
sea view
The landslide warning is maintained at yellow level and is also extended to apply to the municipalities in the north of the interior. The risk of landslides will be mostly linked to possible erosion and landslides along the flood-sized rivers.
The risk of landslides is closely related to the intensity of the rain and water saturation in the ground, writes NVE.
A flood of derisive laughing faces
Sommercomeback
In Western Norway, the rainfall will be more intense this weekend, says Wiberg.
At the same time, she brings good news to people in southern Norway: the forecasts suggest that summer may make an ever-so-small comeback towards the end of next week.
– I have seen hope in the forecasts that summer may return towards the end of next week and perhaps last until August.
She emphasizes that there is naturally some uncertainty in the forecasts so far ahead.
– But I cling to the hope that it will now be our turn for some sun and warmth again, says Wiberg.
Emptying the cabin completely: – Sad
According to the weather reports, it seems that the temperature can dip above 20 degrees, which quickly means ice and swimming for many.
On that occasion, the municipal superintendent in Oslo, Miert Skjoldborg Lindboe, made a clear call:
– The advice is to wait 24 hours before swimming in the inner Oslofjord after heavy rain. The reason for that is that there may be overflow from sewage from the treatment plant inside the fjord, he recently told Dagbladet.
On Saturday, Lillehammer municipality asked people to keep their distance from Mjøsa because contaminated sewage flows into the water.
2023-08-12 18:53:20
#Summer #comeback
