Extreme weather Knud: Read the warning

Weather statistics for Svelvik observation site, Svelvik (Vestfold)

  1. Warning sign

    Ongoing: Extreme winds (Vestfold, Oestfold, Oslo and Akershus)

    From Friday afternoon south storm force 10 on the coast, and locally strong wind gusts, up to 35 m/s in costal areas. Inner areas can also experience wind gusts up to 25-30 m/s . The wind is veering west and decreases early Saturday morning.


    1. Friday September 21, 2018 12:00
      Wind increases
    2. Saturday September 22, 2018 02:00
      Wind wanes

    ConsequencesIt is dangerous to be outside due to items taken by the wind. Expect major delays and cancellations. Very strong wind will likely shut down all public transportation and may cause major power outages and closed roads. High risk of major damage to buildings and infrastructure.

    InstructionsStay indoors. Follow orders from officials to ensure safety.

  2. Warning sign

    Expected: High water level (Telemark, Vestfold, Oestfold, Oslo, Akershus and Buskerud)

    Forecast for the area Swedish border to Langesund: Saturday high water level is expected, estimatet to 70-90 cm above the height given in the tide tables, in combination with high waves. The water level is expected at its highest level Saturday morning between 03 and 05 and Saturday afternoon between 14 and 16. More information about water level and tides at sehavniva.no.


    1. Saturday September 22, 2018 03:00
      Increasing danger
    2. Saturday September 22, 2018 18:00
      Danger is over

    ConsequencesLocal flooding and risk of minor damage to infrastructure and buildings in the beach zone.

    InstructionsBe careful in coastal areas.

Svelvik observation station (26950)

The station is located in Svelvik municipality, 4 m.a.s.l. It is the closest official weather station, 0.0 km away from Svelvik observation site. The station was established in January 2005. The station measures precipitation and temperature. There may be missing data.

Last 30 days: Average temperature was 14.4 °C, 1.3 °C above the normal. Highest temperature was 21.2 °C (30 August), and the lowest was 3.5 °C (16 September). The total precipitation was 130.0 mm. Highest daily precipitation was 38.2 mm (10 September), measured at 7am (8am daylight savings) for the past 24 hours.

Last 13 full months: Highest temperature was 33.3 °C (27. Jul. 2018) and the lowest -17.1 °C (26. Feb. 2018). Highest daily precipitation was 38.2 mm (10. Sep. 2018).

Graph explanation. Hide explanation

The black line shows mean value (both precipitation and temperature). Some stations does not have mean values, and hence no black line.

The red/blue line shows average temperature during the day (24h) (equalized for 30 days). The line is red by pluss degrees, and blue by minus degrees.

The red/blue areas shows the temperature variations throughout the day (24h) with max- and min. temperature as endpoints. The area is red by pluss degrees, and blue by minus degrees.

The lightblue bars shows total precipitation this month. The black lines crossing is the normal (mean) value for precipitation.

The dark grey bars behind the precipitation bars shows snowdepth measured day by day.

Some stations only measures precipitation, while others only measures temperature. If an area or bar is missing the station does not measure this data.

NB! Precipitation is measured at 07 hours Norwegian time. The value (in mm) shows last 24 hours until 07 hours (08 hours summertime). Download other weather statistics from eklima.met.no.

Tabular view for temperature and precipitation per month
Months Temperature Precipitation
Average Normal Warmest Coldest Total Normal Highest
daily value
Aug 2018 16.3°C 15.6°C 27.0°C Aug 4 5.8°C Aug 25 53.0 mm 88.0 mm 8.8 mm Aug 10
Jul 2018 21.0°C 16.9°C 33.3°C Jul 27 8.5°C Jul 1 14.6 mm 76.0 mm 5.4 mm Jul 13
Jun 2018 17.4°C 15.5°C 30.7°C Jun 28 6.0°C Jun 23 33.8 mm 61.0 mm 14.2 mm Jun 17
May 2018 14.6°C 10.7°C 30.4°C May 30 1.4°C May 4 40.6 mm 63.0 mm 15.2 mm May 1
Apr 2018 5.5°C 4.3°C 17.3°C Apr 15 -7.6°C Apr 3 45.0 mm 0.2 mm Apr 25
Mar 2018 -2.9°C -1.0°C 10.0°C Mar 25 -17.1°C Mar 18 57.0 mm
Feb 2018 -4.0°C -5.0°C 2.6°C Feb 14 -17.1°C Feb 26 48.0 mm
Jan 2018 -2.2°C -4.8°C 6.5°C Jan 24 -14.4°C Jan 7 65.0 mm
Dec 2017 -1.7°C -2.9°C 8.7°C Dec 7 -12.1°C Dec 17 66.0 mm
Nov 2017 1.8°C 1.2°C 11.7°C Nov 2 -6.8°C Nov 22 91.0 mm 19.0 mm Nov 5
Oct 2017 7.6°C 7.0°C 17.6°C Oct 6 -2.4°C Oct 30 149.6 mm 110.0 mm 31.2 mm Oct 2
Sep 2017 12.6°C 11.7°C 20.1°C Sep 2 6.5°C Sep 1 122.6 mm 100.0 mm 31.4 mm Sep 12
Aug 2017 15.4°C 15.6°C 23.0°C Aug 10 6.1°C Aug 14 136.4 mm 88.0 mm 28.0 mm Aug 16