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Northern lights in Sundsvall

Tonight's aurora chance in Sundsvall — Kp index, darkness and cloud cover hour by hour.

Last updated 03:20 — the weather source is under heavy load right now, so these are the latest known values (we try again in about 4 min).

Kp right now

2.7

Highest Kp tonight

3.0

Needed here

Kp 4

What is Kp?

  • Kp is a 0–9 scale for how disturbed the Earth's magnetic field is. The higher the Kp, the further south the aurora reaches.
  • Here in Sundsvall you normally need about Kp 4 for the aurora to reach the sky.
  • Clouds beat everything: with an overcast sky even a strong storm stays invisible.
SmallClouds: 0% · Clear window 01:00–21:00

Chance hour by hour tonight

01:00

Small

9 % clouds

Best hour

02:00

Small

15 % clouds

03:00

Small

1 % clouds

04:00

Small

0 % clouds

20:00

Small

20 % clouds

21:00

Small

31 % clouds

22:00

Small

50 % clouds

23:00

Small

61 % clouds

00:00

None

88 % clouds

Full forecast

What do the numbers mean?

Cloud cover

The percentage is tonight's lowest cloud cover. Lower numbers mean a clearer sky.

?Aurora chance

The badge combines Kp index, latitude and cloud cover.

NoneSmallPossibleGoodVery good

Clouds are decisive: even a strong storm stays invisible under an overcast sky.

All places

Clouds = percentage, badge = aurora chance.