September 22 we are at a less rainy than could be expected 4 months ago. It is true that he began a stormy situation on 1 September and was given within of the peninsula from west to east. We also saw a situation of northwest between 6 and 10 September here remember the passage of two fronts that traversed the peninsula from northwest to southeast but gave little precipitation. This precipitation was more significant in the north of the peninsula and the Pyrenees. Remember the day 7, the passage of a storm with winds of 100 km / h in the Basque Country. Around day 17 we found another temperature drop with the arrival of northerly winds to the north of the peninsula, while the episode has been most severe storms in the interior of the Iberian Peninsula. We still have to wait two rain events, one would correspond to 23-26 and another must correspond to the first 5 days of October. In summary we have found to have been much less rain than expected. We would go much further because we can compare this with the file, more specifically, with some historical data. OCTOBER
: very dry and warm
began October with several days of precipitation and some drop in temperature during the first 4 days. Around day 6 start an anticyclonic time resulting in a long run (until day 19-20) of dry weather and sunny with mild temperatures, with very light winds from the south and southwest. Around day 20 will the only time of the month rainy season, first with south wind and rain and days later about 23 days temperature drop and rain will continue until day 25. And all this so widespread throughout the peninsula.
Again anticyclonic return to a situation that is the last 7 days would be days without precipitation south light winds and temperatures warm. NOVEMBER
: low rainfall and warm temperatures
November We are not conspicuous for the amount of precipitation and temperature variability. Now we will distinguish the most significant moments. We predict the first 5 days without precipitation and warm temperatures. The rain is beginning between 7 and 10. We see that lower the temperature by the arrival of a front with northwest winds giving more rainfall farther north and reaching this precipitation to the Mediterranean. The situation is very timely.
come again to an anticyclonic situation taking many days without rainfall at least until day 17 to 19 by the arrival of Atlantic fronts sliding down the north of the peninsula with winds from the south southwest.
Second stage will be the most important rain all month. We can consider the arrival of south westerly winds that would increase in intensity and reached the entire peninsula before 20. Days 20 to 23 days would be more precipitation in the peninsula and then turn to the northwest wind giving a significant drop in temperature and enough rainfall, as ever more rainfall farther north and farther east of the peninsula (area of \u200b\u200bthe Pyrenees and Catalonia). This drop in temperature will cause the lowering of the snow level for the first time around 1000 meters in what we're going to fall. The last days of November come back again to be dominated by the Azores anticyclone. But at low temperatures rising rapidly at first but just end of the month.
DECEMBER:
continue in a cyclonic situation (anticyclone of the Azores) surviving until the 4th. From December 6 -7 Northwest will begin a situation affecting the entire peninsula with high precipitation and temperature drop. This drop in temperature will be normal in a situation in the northwest, ie not be an excessive drop. Will be several days of precipitation amounts, with some storms and accumulated for the first time significant amounts of snow in all mountain systems of the Iberian Peninsula, especially in the Cantabrian Mountains and Pyrenees.
Anticyclonic situation again in mid-month. We will see a tendency to go up the temperature in these days without precipitation. We note a further deterioration of the time around December 20 with pretty significant drop in temperature.
The end of December, he forecast winter 2011 we will publish in late December.
NOTE: Today October 13 we add to the December forecast a change in the snow level. We said that the position would be around 1000 meters, the go down to 500 600 meters in the entire northern half of the peninsula and about 800 - 1000 meters in the southern half of the Penísula. And thus in the central days December will see frost.
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