Early warnings
Early warnings supplement the normal warnings that extend up to 24 hours. The purpose of the early warnings is to provide information on dangerous or adverse weather events earlier than before, usually three days in advance. The exceptions are warnings on hot weather spells and severe frost, which can be issued as much as five days in advance, and warnings on thunderstorm wind gusts, which are issued two days in advance.
The weather events and risk levels are the same as in the 24-hour warnings, but not all warnings apply the lowest or highest risk level. The lowest warning levels have sometimes been eliminated because the warning is repeated so often (reducing the impact of the warning). The highest risk levels are mainly in use for events that give rise to the greatest direct danger.
The wording of the early warning texts differs from that of the 24-hour warnings. The texts describe the probability of the events, which means the probability that the event will occur in a randomly selected 100 x 100 km square within the danger zone at the time stated.
The early warnings were adopted in April 2011.
The events, the risk levels in use, the probability limits and other characteristics are listed in the table below. The regional limits for the sea water level are available in the warnings on the sea water level.
| Warning | Maximum coverage of warnings | Probabilities in use | Risk level 1 | Risk level 2 | Risk level 3 |
| Hot weather | 5 days | 30,70 % | 27° C | 30° C | |
| Cold weather | 5 days | 30,70 % | -20/-25/-30° C | -30/-35/-40° C | |
| Thunderstorm wind gusts | 2 days | 20,40 % | 15 m/s | 25 m/s | 30 m/s |
| Rain | 3 days | 30,70 % | 50 mm/24 h | 70 mm/24 h | |
| Wind warning for sea areas | 3 days | 30,70 % | 14 m/s (only May–October) | 21 m/s | 33 m/s |
| Wind warning for land areas | 3 days | 30,70 % | 20 m/s | 25 m/s | 30 m/s |
| Sea water level | 3 days | 30,70 % | regional | regional | regional |
| Rough waves | 3 days | 30,70 % | 2.5 m (only May–October) | 4 m | 7 m |
| Traffic weather | 3 days | 30,70 % | | very bad | |
Check the up-to-date warnings on the warnings page.
Photo: Destruction after the Asta storm , Marita Waenerberg, Itä-Savo.
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