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Israel, monthly climate summary
Record in israel


November is a month last fall for the usual distribution of monthly rain but in terms of character is perhaps the most typical autumn month.
In it is felt a clear drop at a temperature as opposed to October weather can carry during a winter storm a real character with a temperature similar temperatures average in the winter months and sometimes even with lower temperatures. On the other hand in November may also still summer temperatures (no summer humidity). Temperature winter summer alternating with each other often during the month and sometimes going beyond one month away temperature values arise not repeat previously recorded but towards spring.
Another feature of the month autumn rainfall is expressed in it. Unlike in November from October precipitation amounts are already significant numerically and in terms of importance to agriculture. Variability of rainfall in November and to a year high, sometimes very hot and dry month average and sometimes high amounts of precipitation which in rare cases they even exceed the monthly rainfall amounts more months of the season. Earlier this month, still has a relatively high probability of precipitation Mhuaricia rainy autumn system, sea bus, but as you go through to the end of the month the greater frequency of rain events of low pressure systems from the Mediterranean decreasing the probability of obtaining the Red Sea Bus Rains active.

Temperature Humidity November climatic comfort indices

November temperatures drop significantly relative to October and winter temperatures often more than summer temperatures.
Coastal Plain temperature range from 23-24 degrees Celsius in the afternoon to 12-13 degrees Celsius at night, the mountains are range from 18-19 degrees Celsius at noon to about - 11 degrees Celsius at night, in the valleys They range between 24 degrees Celsius to 10 degrees Celsius Arava and Eilat between 27-26 degrees Celsius in the afternoon to 15 degrees Celsius at night.
Last month, November is characterized by change temp are the days of the month and the month of November one another. About one third of the month from daily maximum temperatures average deviate at 4 degrees Celsius and minimum temperatures by 3 degrees Celsius or more. This variability is very high and almost equal to change the temperature around the average during the torrid spring April and May.
The main reason for this change is in November is the month in which significant cooling occurs fastest between winter and summer temperature during this month tend to be higher than the monthly average in several low cost him earlier this month end.
Unlike the summer and early autumn months of November the annual change is characterized by relatively great. About one third of cases, the average monthly temperature in November a national exam multi-year average deviates by more than 1.5 degrees Celsius every direction. This is reminiscent of the winter months while summer temperatures margins monotone two-thirds of the cases the temperature does not exceed the monthly average higher up above or below average rabbi Annual (both inside the country). This is the difference between November and have come to our region where winter storms frequently almost winter Olmeolme low rainfall in November which dominated shallow sea channel that streams in our region southeast winds dry and warm most days of the month.
Sometimes the month itself is divided into two parts hot, dry first half second half rainy and cold and comes out almost all the transition temperatures almost summer running from October into the first half of November temperatures and winter and the beginning the second half of the month and continue into December, takes place within a day or a few days. The two most prominent cases of sharp contrast between the first half than half of the second month occurred in November 2004 and November 1964, when the temperature average the second half of the month was down more than 6 degrees Celsius temperature average in the first part of the month. An example of the drastic change in temperature In November 2004 can be seen in Figure 1 shows the temperatures in this month at Haifa University.

Figure 1 - changes in temperature during November 2004, the University of Haifa

(To enlarge click on image)

Many still may visit the country in November especially when they are accompanied by significant due to ride bus south of the Red Sea. Earlier this month, still occur occasionally cases in which the temperature crossing the 30 degrees Celsius and rarely even the 35 degrees Celsius. But then the rapid autumn cooling of the land east and south of us does not allow temperatures to soar to such values even when southeast winds.
The most extreme hot events in November occurred many stations the first week of November 1941 and November 2, 1961. These dates were recorded on the coastal plain of the Jordan rift temperatures ranging around 35 degrees Celsius (Lod even recorded temperature of 38 degrees Celsius), while the mountains the temperature was more moderate, moving from 30 to 32 degrees Celsius.
On the other hand the second part of the month have been recorded temperature lower than 5 degrees Celsius throughout the country and low temperatures from 0 degrees Celsius in the mountains north valleys despite temperatures in sea is still warm and end up going on about 21 degrees Celsius and sometimes even more. -25.11.1961 visited happened in the depths of the north and temperatures close to 0 were also the inner lowland. temperature Be'er Sheva fell to 2 degrees Celsius level David is a stand that morning, the only minus 1.8 degrees Celsius. Event Rare more occurred in 28 and 29 November 1953, when temperatures were higher throughout the season and first two weeks of this month all at once night fell between these two mountains and also dropped to below 0 (minus 0.6 and minus 1.7 degrees Celsius in Jerusalem on Mount Canaan!) . Since cooling was accompanied by little precipitation, the event was accompanied by a decline in the mountains of snow are North and Central Mountains including Jerusalem. While snow in Jerusalem was easy and not piled up but it was very rare event likes happened only once since the beginning of the measurements in the capital.
Snow in the north a little less rare soft snow, which fell at a temperature higher than 0 occurred during the last ten precipitation events of November both in 1983 and in 2004. In 2004 two events occurred despite the thin layer of snow piled peaks northern Golan Heights within a week, it was the first ever case of two snow fall in November in 37 years of Israeli control over the Golan Heights.
Relative humidity is already playing a significant role in November in terms of comfort indices climate, warm days and dry days are characterized by unusually wet temperature and the humidity is relatively low and does not creates the heat stress. Relative humidity on the coast and inside the country begins to share more equally in the mountains when she clearly felt the humidity between October and November and felt a slight drop at the beach. Overall average daily relative humidity reaches -65-70% coast, 55-60% inland mountains and bush is going on less than 50%.
In early November, average temperatures in most regions of the country are in a bubble of comfort that is there is no heat stress and cold stress but there is usually towards the second part of the month inside the country and even more so in the mountains the temperature drops below the bubble of comfort and wake up to start heating.
Accepted definition of load index is a measure cold heating degree days (Ym"ah). This index examines the number of days in the month in which the temperature drops to less than -18.3 degrees Celsius Waffle them within a temperature between this entry temperature of the time average . For example, if in 10 days a month temperature average is 16.3 degrees Celsius and more time is greater than -18.3 degrees Celsius so that month will be 20 Ym"ah.
In November, average, coastal residents still not a real need for heating in this region recorded 30 Ym"ah. Mountains on the other hand already have to heat the houses in quite a long while subscribers where 120 to 150 Ym"ah. Negev also exist cold starts in November and received it about 100 Ym"ah. Him"ah values deep in the North East around the 50 range so that for convenience Ym"ah coastal climate suffered all summer heat and humidity in this region becomes a favorite.


Amounts of rainfall in Israel's Mediterranean range from about 100 mm in the western Galilee and 70-90 mm on the coastal plain to the upper Galilee - 50-60 mm inner lowland Mountain Platform of the Judean hills. As October November quantities too precipitation vary mainly according to how close to the sea and less significant in order of Cponiotho of the region. topography continues to play a relatively small role in November, increasing the annual average rainfall amounts low precipitation amounts in the mountains on the coast, so that increasing rainfall due to the topographical lift fails to overcome the decrease in precipitation amounts resulting distance from moisture sediments provides to our region, the Mediterranean Sea. This is expressed by the relative rainfall in November of total annual amount is minimal maximum offshore eastern mountain stations as you can see in Figure 2.
Remember Distribution of rain events depends Vsinopttika and in rainfall, but the situation Ahsinuptti waterfalls accompanying temperature bromine November rain storms most beneficial to the coastal zone. However, when events occur in November because of wintry classics deep systems of low pressure are characterized by soil and bromine in the cold too unusual, there may be distribution of precipitation "winter" rainfall amounts in the mountains where no lag after the beach and sometimes even exceed them significantly, as happened in November 2004.

Figure 2 - Relative amounts of precipitation in November

(To enlarge click on image)

Context relative quantities of November should be noted that although November is one of the three-month rain season record, but coastal stations where the average monthly precipitation amounts very frequently in November February precipitation amounts are also a few stations are those slightly in November and a few stations located in the same quantities of the third month sediments (eg Nir Port waves near average in November in 1954-2004 83.8 mm and 79.8 mm average February). Yet even these stations is most years in November brings more rain since February, but the frenetic nature of November makes rainy November, (which may be rainy on average up to 3.5 times around the average of the years to more than 5 times individual stations), compensate the November increase the average dry-free and rarely any rain at all (see Figure 3). February contrast, we never without precipitation, but on the other side is rarely more spatial average rain from two multi-year average.

Figure 3 - Average rainfall amounts around November in the years 1954-2003

(To enlarge click on image)

Figure 3 shows that the inter annual variability of rainfall amounts is very high in November on average once every decade the amount of rain coming down over the Mediterranean region to Israel's semi-arid high by more than two multi-year average in this region falls in November. The fact that much of rains in November falling rain cells with high precipitation intensities causes mainly in the coastal area there are stations in November rainy daily volumes of more than 100 mm monthly summary quantities of 300 mm or more. Monthly amounts higher than 300 mm are very rare and occurred in seven different cases which were recorded at the stations in such quantities in 70 years time ie the time back to decade. The following month, and the region in which these amounts were recorded:
1938: central coastal plain (the Dan region over 400 mm) in some northern coastal plain stations in Caramel. 432 mm high amount of Ramat Gan.
1944: Some of the stations on the coastal plain, Galilee and Caramel Mountains also unusual in the Judean Hills.
1953: in the Beer Tuvia
1955: East Tel Aviv. To 380 mm in Petah Tikva - Head Eye - Kfar Kassem including 255 mm one day in Kafr Qasem.
1964 East Sharon. 425 mm high amount Kfar Yona.
1986: in the southern coastal plain stations (though a few stations over 400 mm), some stations in Caramel and the Upper Galilee and again at stations on Mount Judah.
1994: In most stations, the southern coastal plain from the southward and northward, the central coastal plain, Sharon (Sharon West over 400 mm 455 mm Samuel garden!) In the northern coastal plain stations in the Western Galilee and Upper Galilee.
Two recent cases (shown in Figure 4) are most extreme in the 7th though in November 1938 and November 1944 did not much behind them and quite a few stations in the country where the monthly peak of November is not registered in either of these months. That is why even though in November 1986 and November 1994 stand out above the rest of the month of November in 50 years is not seen as unique cases remote probability of their return. On the other side of November are the average balance arid portions of the stations have already occurred in November, where not a single one in the rain gauge. prominent Bioabshm In the past 50 years in November 1958, 1977 and 1980 which recorded an average rainfall of around 7 mm or less that is less than 10% of the average monthly. Above all stood out in November 1962 in which most of the stations recorded no rain in the amount of rain that fell at the same month reached an average of around 1.4 mm that is about 2% of the average monthly amount this space to annual average. Because of the asymmetric distribution November Rains around the average (in the rain deviations above average rainy exceptional high dry years), many more than the average dry November rainy from November, so no surprise about the existence of November following sequences characterized by dryness.

Figure 4 - November 1986 rainfall in November 1994 in relation to multi-year average of November residue

(To enlarge click on image)

Like the rest of the fall months usually down most of the sediments in November at the other end of the month. Although November was rainy almost every Mshkeaiam got the second half of the month as November 1992 and November 1953. November 1964 and November 2004 no precipitation fell at the first part of the month in most stations the whole season rains started in fact just the second part of November, in 17 month. However many sediment down the second half of the month covered most of the stations not only the monthly rainfall deficit that had opened the first part of the month but the accumulated deficit from the beginning of the season. Indeed there were stations that received these in November after precipitation of 150% and 200% more relative to the average amount that down to annual average in the fall.
November 1976 occurred in a case in which only opened in November of the third ten month yet ended unusually rainy rainy Ramot Menashe even 3 times normal.
There were cases in which in November was a dry month but ended four days of rain this month have made it significantly in relation to, for example, in November 1979 and November 1991 (although in November 1991 were stations where the amount of rain was unusually high at the beginning of the month due to heavy rains that fell on third month).
November 2000 Some of the stations in the north were the average for the last two days of November 2001 the last day of the month when Caramel got 80-120 mm in some northern coastal stations, many stations could bounce a lot in this area to above average after the monthly amount which until that day did not pass the 50% monthly average.
Increasing rainfall during the month was also reflected in Figure 5 indicates the cumulative rainfall in five days a month.

Figure 5 - The average rainfall for periods of five days in November

(To enlarge click on image)

Precipitation strengthening trend of the month progresses clear though the first third of this month no less quantities quantities second trimester. This finding is not temporary and it is obtained from a comprehensive sampling of 30 stations in a long time period of 50 years, and indeed occurred in cases where actually been the first trimester of the month contributed to the most precipitation.
In November 1986, one such was the rainiest November, long rains fell between 1 month to 11 month. The most rainy days of rain that month were the 2nd and 7th month, including floods and floods were recorded. Rainy day in November 1955 most of the month was on the 8th during which there were more than 200 mm in Petah Tikva - Head of the eye - Kafr Qasem.
Tel Aviv in November 1938 decreased by 5 the first ten consecutive days of November, 405 mm from 425 mm down there in total in that month. It was rainy in the history of TA measurements many other stations in the Dan region of large floods have occurred Tel Aviv and its surroundings especially at 6 in the amounts Ymmtiut recorded about 200 mm and a bit beyond that at the Dan stations. Daily amounts higher than 200 mm are rare in amounts and when this occurs has been recorded in November (1938, 1955) or near (24 October 2000, 9 December 1923), except for the storm that occurred in Kerem Maharal last day of 1998 .
Unlike the rare occurrence Ahctabrotan high daily amounts of 200 mm, daily amounts higher than 100 mm and sometimes even over 150 mm recorded in November, one coastal stations somewhat tax-years. In 1964 there were no stations which occurred in two consecutive rainy days where the daily high was 100 mm in 20 and 21 a month.
Daily precipitation amounts higher than 100 mm above the mountains rarely substantially equivalent amounts in the coastal area. And yet such cases have occurred on 23 November 1955 Central Mountains, on 20 November 1964 the Northern Mountains, on 12 November 1983 the Northern Mountains, On 3 November 1992 and November 2004 in the Western Galilee individual stations western slopes of the Judean hills. the daily highest mountains in November fell Beloved days on Mount Meron (Yael Castle station) on 20 November 1964, amounting to -179 mm.

Rainy days

November rains in the north down to approximately -7-10 days (Ayalon also recorded 12 days of rain in a multi-year average) and 5-8 days of rain stations in central Israel. Semi-arid region bordering the Negev recorded an average of 4-5 days of annual rain. Volatile nature of November brings high deviations from tax, the average rain days of various months. In November, most Perhaps Ahshachunim month total rainfall will be characterized not stop it even happens one rainy day (in November 1962 in most stations) but on the other hand there may be the month of November with the number of days of rain double or even triple in relation to the average (for example, grouping Hasolelim - 21 days of rain in November 1994 compared with 7 days to annual average).
Sometimes even though the minority share of rain days in November's local bake some rain from him, is an impressive sequence of rainy days throughout the country. November 1986 were received early this month almost 10 days in a row between the 1st and 11 with only 5th interrupts the sequence. In 1994 there were slightly stations 9 consecutive days of rain in 22 to end this sequence continued until December 4, but belongs to debut November 1964 (Fig. 6) rains started only in 17 month but declined for 11 consecutive days in almost all stations are characterized by Mediterranean climate, the amount accumulated in the Sharon High storm than 300 mm bull dove (not excellent illustration) the amount of 425 mm!

Figure 6 - absolute storm precipitation amounts of rain between 17 to 27 November 1964

(To enlarge click on image)

Rain intensity

November is a month characterized by high rain intensity. The main reason for the high rain intensities is the warm sea air is blowing over it which is due to the relative temperature can have a lot of water vapor in relation to the humid air that comes to our region in winter. With the rise of air Vahatckerrotho water vapor forming clouds Armtiym despise with impressive water content. Like - it must be remembered in November and especially the first half pipe events often occur in the Red Sea which is also characterized by clouds and rain intensity of fictitious developed strong, but events are not strong rain intensities are made in the coastal area but in the south and east.
Felt strong intensities average daily intensity (obtained by dividing the total deposits in the days of rain this month) which is the highest daily volume in relation to the other months of the season. In addition, when examining the percentage of rain this month over different thresholds of high intensity (20 mm / h and above) relative to other months of the season, revealed that most stations this month recorded the highest percentage of precipitation falling at high volumes of total monthly rain.
High rain intensities are also naturally expressed strengths highlights strengths exceptional events that took place this month.
Coastal plain recorded Technoda in Hadar in very unusual rain event on 23 November 1949 (in most regions of the country was very dry November). During this event there were 71.6 mm in an hour at high volumes even more short intervals within the same hour: 23.2 mm within 10 minutes, 32 mm in fifteen minutes, 40 mm in 20 minutes, 53.3 mm in half an hour and -64.5 mm within 45 minutes. Although already signed up from 71 mm at the country, but some of the strengths recorded this occasion shorter periods are still in the peak intensities recorded so far in the country.
Maximum precipitation intensity for a period of 20 minutes was recorded as a result of Israel's Ashdot Yaakov in the Jordan Valley on 7 November 1957 when 52 mm fell instead of rain accompanied by heavy hail SR.
Very high intensity was recorded as a result of Mi"as Eilat there fell -11.11.1973 21 mm (about 70% average annual amount) within 10 minutes.
Unlike October, characterized by high rain intensity only short periods of rain, rain in November strengths high can last over time accumulate very significant amounts of rain. Exceptional event that befell the eastern Gush Dan on November 8, 1955 is the best example of this. Accumulation beyond day 255 Kfar Kassem platoon commander in this event were the strengths records shorter periods such as 220 mm in nine eye wax eye near the top three and 170 mm in 5 hours Kibbutz plow is also found in the same area. May be marry these were broken in the incident had happened at Kerem Maharal on 31 December 1998 incident that occurred in the memory on 4 December 2001 but in the absence of strengths measurers which the focus values were not recorded storm broke the record above. It should be noted that this event was also recorded impressive power Very briefly Spinoza Street in Tel Aviv, 16.5 mm in 5 minutes.
Strengths not only records a continuous rain for November but also set an event record of non-sequential rain intensity for a period of 5 days. This record was set in Tel Aviv in November 1938 when -5-9 where 405 mm fell. Amounts close to those stations down in the streets of the southern coastal plain single five-day period between 29 November to 3 December 1991.

The review relied on data Ahshm"te, including age groups by summarizing the monthly summaries rain seasons out in 1949-1975.
Historical data regarding the incident of 1938 were grouped by Dov Ashbel book: one hundred seventeen years of rainfall measurements in

The review also helped write Yair Goldreich's book: The climate in Israel - Applied Research Observations
Jacob Katznelson's book: the Land of Israel as a material element of the country's water economy

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