4th European Conference On sever Storms 10-14 September 2007 –Trieste –ITALY CHARACTERISTICS SEVER STORM OVER EGYPT Fathi Mohamed El-ashmawy ( Egyptian Meteorological Authority) P.O Box: 11784:Koubry El-quobba Cairo ,Egypt e-mail address
[email protected] 1- INTRODUCTION Egypt located in north east of Africa Dust storm Number of occurance of sandstorm over Cairo during the period phenomenon over Egypt is considered to be 1968-2005 most striking weather hazard ,dust ,sand are raised from the ground by strong southerly wind 14 13 or south west coming from west Africa toward 12 11 11 east parallel to the coast of the Mediterranean to 10 depending on meteorological conditions &state 9 8 8 of soil including the size of the particles .we 7 discuss the meteorological conditions which 6 6 6 6 N ofoccarance causes dust &sand storm s over Egypt and 4 4 4 44 4 4 4 3 3 3 3 general patterns of 2 2 22 2 2 2 22 22 11 11 1 0 0 0 0 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2-Types of storms years There are three types of dust storms that 3-RESULTS AND CONCLUSIONS affect over north Africa & middle east After investigate the synoptic charts surface A- Sahara depression (desert cyclone ) and upper air levels we can restricts the formed in the lee side of Atlas Mount. reasons of sand storms over North Africa Range during spring and Egypt by the following * El-Tantawy ( 1969 ) showed that when In winter cold and dry southerly winds north air cross the mount .