October 2018 N.E. Italy analysis

I have considered the data from Treviso airport (N.E. Italy) to sum up the monthly analysis (Figure1) in the N.E. of Italy.

The mean minimum and maximum temperatures (11.84/21.17 °C) have been considerably above the 1971-2000 average (8.8/18.9 °C). This is due to the continuous mild conditions especially between the first and second decade, with no cold spells during the whole month (Figure1) and numerous days with maximum temperatures above 20 °C and minimum above 10°C.

Figure1. Max and min temperatures Treviso October 2018.

In fact, the number of days observing maximum temperatures above 20°C is 22, with 15 consecutive days (in the first two decades) when the maximum values never fall below 20°C. Moreover, during this period, for 3 consecutive days the maximum values reached 24°C, almost 6°C above the climatological average, and, during the whole month, this values has been reached 6 times.

During the long period of very mild maximum temperatures, also the minimum values were well above the average, with 18 consecutive days observing minimum temperatures above 10°C, 5 consecutive days above 13 °C (almost 6°C above the climatological average). To notice that, even if the maximum values decreased during the intense rainfall event occurred in the last week of October, the minimum values stayed high due to the strong southerly winds blowing from the Adriatic Sea which caused still mild conditions and due to the continuous overcast conditions which have limited the radiative cooling at surface during the night.

The observed rainfall (135 mm) ,instead, has been above the average (92 mm). This is due to the intense event occured in Italy during the last week of October,which has caused floods in several areas. Thus, though the total observed rainfall is above the climatological average, it was not evenly distributed during the month, with 20 consecutive days (between the 6th and 26th) with no rain (anticyclonic conditions), and only 9 with observed rainfall, 6 of them consecutively during the last week of the month.

Figure2. Daily rainfall Treviso October 2018.


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I am Edoardo and I am passionate about weather analysis and forecasing. I would like to share my knowledge and to learn more with others (both International and Italian community).

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