Meteorology 



56. This section summarizes the meteorological measurements made at the 

 FRF in 1984. A discussion of the data and a comparison with previous years 

 are also presented. Appendix D contains atmospheric pressure, wind speed and 

 wind direction values during storm conditions. 



Air temperature 



57. The annual mean temperature for 1984 (based on four observations 

 per day) was 15.4° C with a 3.7° C standard deviation. Monthly mean tempera- 

 tures are shown in Table 3 and Figure 4. The marine climate at the FRF 

 moderates the extremes of both summer and winter. Summer temperatures were 

 relatively consistent with monthly averages near 25° C and low standard devia- 

 tions. During December through February, although infrequent, freezing tem- 

 peratures can be expected at the FRF. Large daily air temperature variations 

 were observed in the spring and fall caused primarily by the effect of 

 onshore/offshore winds and the temperature difference between the ocean and 

 land. 



58. A very cold January (see Figure 4) was a major reason the annual 

 average air temperature was 0.7° C lower than in 1983. 



Table 3 

 Monthly Mean Air Temperature and Atmospheric Pressure Statistics 























Air Temp* 



2rature 



Atmospheric 



Pressure 



Month 



1984 



1983 



1983 



and 1984 



1984 



1983 



1983 and 1984 



Jan 



3.3 



9.3 





6.2 



1020.8 



1017.6 



1019.2 



Feb 



7.2 



6.9 





7.1 



1015.9 



1015.5 



1015.7 



Mar 



7.2 



10.5 





8.9 



1014.2 



1010.0 



1012.1 



Apr 



12.7 



13.3 





13.1 



1012.8 



1013.1 



1012.9 



May 



19.1 



18.9 





19.0 



1015.8 



1016.9 



1016.4 



Jun 



23.6 



23.2 





23.4 



1016.2 



1016.5 



1016.3 



Jul 



25.3 



26.8 





26.1 



1017.0 



1016.8 



1016.9 



Aug 



25.4 



25.8 





25.6 



1015.2 



1016.7 



1016.0 



Sep 



21.3 



19.4 





20.3 



1018.6 



1018.3 



1018.4 



Oct 



18.2 



17.7 





17.9 



1020.4 



1020.4 



1020.4 



Nov 



11.2 



12.6 





11.9 



1020.4 



1015.4 



1017.9 



Dec 



10.6 



8.2 





9.4 



1021.1 



1020.4 



1020.8 



Annual 



15.4 



16.1 





15.7 



1017.4 



1016.5 



1016.9 



30 



