Air temperature anomalies for Croatia in September 2017
The analysis of air temperature anomalies reveals that the average monthly air temperature for September 2017 throughout Croatia was below the multi-annual average (1961 – 1990), with the exception of Dubrovnik, where the average monthly air temperature was on par with the above average. The lowest air temperature anomaly value was -1.9 (Zavižan).
Absolute maximum air temperature anomalies for September 2017 were mainly below the corresponding average (1961 – 1990) at all analyzed stations and were within the range from -2.7°C to 0.6°C. A comparison with the available data series for analyzed stations (Table 1) reveals that there were no maximum air temperatures exceeding the absolute maximum on record in September 2017.
According to percentile ranks and classification ratings, thermal conditions in Croatia for September 2017 fall in the following categories: cold (part of Northern and Central Adriatic and their hinterland, Central Croatia as well as part of the Northwestern and Eastern Croatia) and normal (the rest of Croatia).
Precipitation amounts for Croatia in September 2017
An analysis of the precipitation amounts for September 2017 expressed as percentages (%) of the 1961 – 1990 average shows the precipitation amounts to be above the average at all analyzed stations. A comparison with the multi-annual average reveals that corresponding precipitation amounts for September 2017 were within the range of 110%-470% of the above average for this month. In September 2017, the maximum daily precipitation amount observed at 7 a.m. (CET) at the main meteorological station Zadar was 213.4 mm (12 September 2017), less than the highest daily precipitation amount on record for Zadar (352.2 mm, 11 September 1986). The figures below show records for the main meteorological station Zadar for 10-11 September 2017 and 11-12 September 2017 as well as 10-11 September 1986. On 11 September 2017, rain shower started at 4:57 a.m. and lasted till noon, and then rain was recorded till 4:52 p.m. The maximum 10-minute precipitation amount for this day was 18.9 mm while the total precipitation amount during the period in question was 283.4 mm.
The precipitation amount for September 2017 at several stations (Zavižan, Zadar, Pazin, Ogulin and Zagreb-Maksimir) was the highest on record while some stations (Gospić, Pazin and Karlovac) had the highest daily precipitation amounts on record in September 2017 (Table 2).
According to percentile ranks and classification ratings, the precipitation amounts for September 2017 fall in the following categories: wet (part of Eastern Croatia, part of Central Adriatic and its hinterland as well as the wider areas of the towns of Rijeka and Dubrovnik), very wet (part of the Northern and Central Adriatic and their hinterland as well as part of Central and Northeastern Croatia), normal (part of the Southern Adriatic) and extremely wet (the rest of Croatia).