Despite the increase of twelve points in one month, seven of the 10 Demand Units remain in a pre-alert scenario.
The water reserves of the Balearic Islands are at 59% in November. The heavy rains recorded in recent weeks have allowed an increase of twelve percentage points over the previous month. However, the situation is still worse than the same month last year when the reserves were at 61%.
By islands, the one that has experienced the greatest increase is Mallorca (from 47% to 60%), followed by Eivissa (from 47% to 60%). It is followed by Eivissa (from 46% to 52%), Formentera (from 53% to 56%) and Menorca (from 51% to 53%).
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Regarding the Demand Units (DU), despite the generalized rise, there are no changes in the scenarios because it takes three consecutive months to change. Therefore, seven of the 10 UDs of the Balearic Islands (Eivissa, Palma-Alcúdia, Tramuntana Norte, Tramuntana Sur, es Pla, Artà and Migjorn) remain in a drought pre-alert scenario.
Data from the State Meteorological Agency (AEMET) indicate that November has been a very wet month in terms of rainfall in the Balearic Islands, since an average of 240.7 l/m2 have accumulated, three times the usual. In Mallorca, for example, it has rained 256.4 l/m2 (the historical average is 78.4 l/m2); in Eivissa, 144.6 l/m2 (the historical average is 59.7 l/m2); in Formentera, 110.9 l/m2 (the historical average is 42.6 l/m2); and in Menorca, 246.4 l/m2 (the historical average is 78.4 l/m2).
The November rains have also reversed the inter-annual rainfall deficit in all the islands. Thus, in the archipelago as a whole, rainfall is 28% above average. By islands, Mallorca is 25 points below and Menorca, 36. The records of the Pitiüses are 35 percentage points above the historical average.
If the upward trend continues, it is foreseeable that UD Migjorn will leave the drought pre-alert scenario next month. The rest will need between two and three more months of records within the normal situation.