PART II: METEOROLOGY 



9. This section summarizes the meteorological measurements made during 

 the current year and in combination with all previous years. Meteorological 

 measurements during storms are given in Part IX. 



10. Mean air temperature, atmospheric pressure, and wind speed and 

 direction were computed for each data file, which consisted of data sampled 

 two times per second for 34 min every 6 hr beginning at or about 0100, 0700, 

 1300, and 1900 eastern standard time (EST); these hours correspond to the time 

 that the National Weather Service (NWS) creates daily synoptic weather maps. 

 During storms, data recordings were made more frequently. The data are 

 summarized in Table 2. 



Table 2 

 Meteorological Statistics 































Mean 



Air Temperature 



deg C 



Mean 

 Atmospheric Pres. 

 mb 



Precipitation, r 







Wind Resultants 









1990 



1980- 



■1990 





1990 

 Total 





1978-1990 



Speed 

 m/sec 



Direction 



des 



Speed I 

 m/sec 



direction 



Month 



1990 



1983-1990 



1990 



1983-1990 



Mean 



Maxima 



Minima 



deg 



Jan 



8.0 



5.8 



1016.9 



1017.8 



118 



98 



180 



44 



2.4 



239 



2.3 



332 



Feb 



10.2 



6.6 



1019.3 



1017.6 



68 



75 



113 



20 



1.4 



248 



1.7 



346 



Mar 



11.3 



9.5 



1020.8 



1016.7 



114 



93 



206 



35 



0.7 



27 



1.5 



2 



Apr 



13.9 



13.5 



1016.0 



1013.6 



136 



99 



182 







0.4 



10 



0.3 



328 



May 



18.9 



18.8 



1012.9 



1015.8 



189 



76 



239 



20 



1.4 



216 



0.5 



193 



Jun 



22.7 



23. A 



1014.2 



1015.4 



136 



88 



136 



27 



1.2 



232 



1.1 



201 



Jul 



26.1 



26.0 



1014 . 8 



1016.3 



32 



95 



275 



19 



2.9 



187 



1.8 



209 



Aug 



25.5 



25.9 



1014.1 



1016.1 



63 



98 



221 



30 



0.3 



43 



0.5 



92 



Sep 



22.5 



22. A 



1015.1 



1017.6 



20 



83 



226 



5 



1.5 



15 



2.0 



39 



Oct 



20.3 



17.8 



1015.7 



1019.3 



73 



65 



143 



17 



1.1 



52 



2.3 



27 



Nov 



12.7 



13.2 



1017.3 



1018.2 



54 



90 



145 



26 



2.1 



285 



1.7 



346 



Dec 



10.7 



7.9 



1019.6 



1019.5 



57 



66 



131 



4 



1.1 



313 



2.2 



332 



Average 



16.9 



15.9 



1016.4 



1017.0 



88 



85 







0.5 



257 



0.8 



354 



Total 











1060 



1026 















Air Temperature 



11. The FRF enjoys a typical marine climate that moderates the temper- 

 ature extremes of both summer and winter. 



Measurement instruments 



12. A Yellow Springs Instrument Company, Inc. (YSI) (Yellow Springs, 

 OH), electronic temperature probe with analog output interfaced to the FRF's 

 computer was operated beside the NWS ' s meteorological instrument shelter 

 located 43 m behind the dune (Figure 2) . To ensure proper temperature 



8 



