"كتيّب سوريا (بما في ذلك فلسطين). لندن: إدارة استخبارات الأركان البحرية، يونيو ١٩١٩" [ظ‎‎٢‎٦] (٧٣٨/٥٧)

48
CLIMATE
During south winds and calms, mists frequently roll up the
valley from the Dead Sea which the sun disperses in the after
noon.
Wind .—The wind observations in the Jordan valley are very
scanty. As far as may be judged at Melhamiyeh west winds
predominate throughout the spring and summer, attaining a
maximum of frequency in July and changing to north-west in
August. In winter and spring north winds are fairly common,
and windless days, especially in winter, are frequent all through
the year. The average wind force at noon is much greater
than during the morning and evening. The morning and
evening forces are about equal. In summer the noon wind
force is on the average three to four times greater than in the
morning and evening. As in other parts of the country, the
maximum wind force observed is from 5-7 (Beaufort scale).
At Jericho conditions are somewhat different. While the
average noon wind force is much greater than the morning,
the evening wind is on the average 50 per cent, greater, thus
increasing the means of the three observations and making
the average wind force at Jericho greater than at Melhamiyeh.
Calms are also fewer, north and south winds more prevalent,
south-west rare, and the west winds change to north-west in
the spring instead of in autumn as at Melhamiyeh. On the
Dead Sea in the winter months, as already noted, sudden and
violent gusts and storms prevail till the end of April when
calmer weather accompanied by intense heat sets in. In the
calmer weather, from 9 hr. to 15 hr., it is generally windless or
a slight south wind may blow which after that time to sunset
changes to a north wind. Easterly and westerly winds are
rare.
Nekhl
Lat. 29° 54' N., long. 33° 45' E., alt. 1,300 ft.
This station is not in Syria but on the plateau of North Sinai
sufficiently near the frontier to give an idea of the climate of
the southern region in the absence of a station in Syria proper.
Temperature. The main characteristic of this region is the *