Paper 1 



ridge nort h-oort heast wa rd from the Azores hiqh brought high 

 temperatures and drought conaitions to northwestern Europe. 



The western North Pacific was dominated by a strong surface high 

 pressure cell. The pressure gradient was very weak* and the 

 paths of the storm centers were diffuse. 



At 700 mb/' there was a trough at ^75Vlr and a subtropical ridge 

 over the eastern Pacifier which progressed eastward to bring the 

 west coast trough over the western States. There was an 

 anomalous stri?ngthening of the subtropical jet stream approaching 

 the southwestern United States* while pressures rose to the east. 

 The trough S-outh of Greenland deepened* and the ridge over 

 western Europe strengthened- 



JuJLj^ - The North Atlantic was relatively ouiet* with diffuse 

 cyclone centers. The sea level pressure pattern was near normal 

 for the month. The few storms that reached Europe did not 

 alleviate the drought or ease the reco ro -break i ng heat. 



The North Pacific storm tracks were about 5 degrees farther south 

 and more easterly than normal into the Gulf of Alaska. There was 

 an anomalous surface low at 55N'* 180W* with lower than normal 

 pressures over the entire eastern North Pacific. 



The 700 mb f loy over the Pacific was fast and zonal between the 

 Gulf of Alaska low and a strong subtropical high northwest of 

 Hawaii. The western U.S. trough retroaraded into the eastern 

 Pacific. Ridging over the Great Plains induced a strong trough 

 over eastern North America. The strong blocking ridge over 

 Europe continued* extending southward from a +55 m 700 mb height 

 anomaly over the North Sea. 



Ayoust - The major North Atlantic storm centers traveled eastward 

 from the Gulf of St. Lawrence* then curved northeasterly and 

 passed into the Denmark Strait. The usual storm paths south of 

 Iceland and across the British Isles were not followed this 

 month. Hurricane Belle brought heavy rainfall tc Long Island and 

 southern New tngland. 



The principal North Pacific storm track was from Japan northeast- 

 ward into the Bering Sea. The sea Level pressure pattern closely 

 matched the cl imato I og i ca I mean for the month* although pressures 

 were slightly lower (-5 mb ) than normal over the Aleutian chain. 



The 700 mb wind flow was zonal between 40N and 5CN across the 

 entire Pacific Ocean. Troughs lay over both coasts of the United 

 States* with a ridge over the central States. A deep low over 

 the Davis Strait intensified the d r ought -produci ng ridge over 

 western Europe. 



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