



Number of 





100R-, 



<J, 



Year 



Latitude 



Observations 



R 



percent 



degrees F 



MARCH 











1956 



30°N 



95 



0.82 



68.0 



2.0 





36° 



102 



0.65 



41.7 



2.3 





42° 



54 



0.17 



2.8 



2.3 





48° 



66 



0.71 



50.1 



1.6 



1957 



30°N 



110 



0.82 



66.8 



1.6 





36° 



107 



0.70 



49.3 



2. 





42° 



74 



0.60 



35.7 



2.1 





48° 



65 



0.15 



2.3 



2.0 



SEPTEMBER 











1956 



30°N 



67 



0.88 



77.8 



1.7 





36° 



96 



0.94 



88.2 



2.2 





42° 



52 



0.86 



74.2 



2.3 





48° 



66 



0.69 



48.2 



2.8 



1957 



30°N 



91 



0.75 



55.6 



2.0 





36° 



89 



0.69 



47.4 



2.5 





42° 



72 



0.66 



43.6 



3.0 





48° 



63 



0.62 



38.2 



1.4 



29 



