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, i 



im 





Wind Resultants 









1989 



1980- 



1989 





1989 



Total 



59 





1978-1989 



Speed 



m/sec 



2.1 



Direction 

 deg 



Speed C 

 m/sec 

 2.6 



lirection 



Month 



1989 

 8.1 



1983-1989 

 5.4 



1989 1983-1989 

 1019.3 1017.9 



Mean 

 96 



Maxima 

 180 



Minima 

 44 



deg 



Jan 



316 



337 



Feb 



7.0 



6.1 



1019.5 1017.4 



113 



76 



113 



20 



3.5 



352 



2.0 



350 



Mar 



10.0 



9.3 



1017.5 1016.3 



206 



92 



206 



35 



3.0 



16 



1.6 



1 



Apr 



13.4 



13.5 



1014.5 1013.4 



104 



96 



182 







0.3 



53 



0.3 



324 



May 



18.5 



18.7 



1013.2 1016.0 



97 



67 



239 



20 



1.5 



212 



0.5 



186 



Jun 



25.0 



23.5 



1014.1 1015.4 



117 



84 



130 



27 



2.8 



196 



1.2 



198 



Jul 



25.9 



26.0 



1015.1 1016.4 



275 



100 



275 



19 



1.4 



183 



1.7 



212 



Aug 



25.6 



25.9 



1013.3 1016.3 



63 



101 



221 



30 



0.9 



75 



0.5 



94 



Sep 



24.6 



22.4 



1015.9 1017.8 



226 



88 



226 



5 



3.7 



65 



2.0 



40 



Oct 



17.7 



17.4 



1016.7 1019.6 



63 



64 



143 



17 



1.8 



10 



2.4 



26 



Nov 



13.1 



13.3 



1014.8 1018.3 



92 



93 



145 



26 



1.5 



294 



1.8 



353 



Dec 



2.9 



7.4 



1015.7 1019.5 



113 



66 



131 



4 



4.1 



338 



2.3 



333 



Average 



16.0 



15.7 



1015.8 1017.1 



127 



85 







0.9 



356 



0.9 



357 



Total 









1528 



1023 















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 



