Peri od III - 4 March to 6 March 1967 Synoptic Weather Conditions 



On the first day, a cyclone with a 956-millibar center, moving north- 

 eastward, was located about 300 miles southwest of Iceland. Whole gale winds 

 extended to 600 miles over most of the southern sector. At the same time a new 

 cyclone was developing about 300 miles southeast of Cape Race, Newfoundland 

 with whole gale winds to 300 miles from the center by early on the 5th. Frontal 

 systems extended southward and southwestward from each of the two cyclones. 

 By 0000Z on the 5th, the low to the southwest of Iceland had moved directly 

 across Iceland in a northeastward direction and began to fill. The new low 

 developing east of Cape Race moved rapidly eastnortheastward passing to the 

 north of the British Isles and into the Norwegian Sea early on the 6th. It did 

 not develop into as intense a cyclone as the more northerly one that crossed 

 Iceland. 



From the beginning of the period, station J was in the cold air behind 

 the frontal system associated with the deep low center which later crossed Iceland. 

 At this time J was experiencing winds up to 48 knots, while wave heights reached 

 a maximum about 18 hours later of 29.2 feet. Station A, at the beginning was 

 also experiencing winds of about the same speed but the wave heights did not 

 reach a maximum until 0000Z on the 5th when they were recorded at 22.4 feet. 

 At station K, however, the winds were calm at this time. With the approach 

 of the second cyclone on the 5th, the winds at station J reached a maximum of 

 55 knots just prior to the passage of the cold front associated with the system. 

 The wave heights recorded at J were as high as 32.3 feet at 0000Z on the 6th. 

 The highest wave heights were also recorded at station K at the same time but 

 they were only 16.5 feet. The strongest winds at K were 27 knots at 1800Z 

 6 March. As the second storm moved rapidly eastward, the winds at station J 

 died down quickly to 15 knots by 0600Z on the 6th. 



A-2 



