Table 31. -- Height of ceiling by hour of day, and number of days per month In each height cla£^ --Continued 



(Av. 1950-58) 



Time 

 of 



Ceiling in hundreds of feet 



day 







1-2 



3-4 





1 -19 20-29 



30-49 



50-95 



96-199 



Unlim. 



April 



0300 









0.1 



0. 3 



1.3 



2.9 



5.2 



2.2 



: :■' . 



0900 









. 3 



.8 



1 .2 



1.6 



4.4 



4.6 



17.1 



1200 









.1 



.8 



1.0 



2.2 



4.3 



2.9 



18.7 



1600 









.1 



.8 



.1 



2.7 



5.1 



4.3 



16.9 



1800 









.2 





.8 



2.0 



5.7 



3.2 



18.1 



2100 











.4 



1.3 



3.2 



4.5 



2.5 



18.0 



Av . 









. 1 



.5 



1.0 



2 . 4 



4.9 



3.3 



17.8 















May 











0300 



0. 1 





0.1 



. 1 



.6 



1.0 



2.0 



8.9 



2.4 



15.8 



0900 









.1 



1 . 1 



1.4 



2.0 



7.1 



3.0 



16. 3 



1200 











.8 



.9 





7.1 



3.4 



14.0 



1600 











.6 



.8 



5.0 



8.9 



3.4 



12.3 



1800 









.1 



.3 



.6 



4.8 



. ; 



2.9 



13.9 



2100 









.2 



.7 



.2 



3.4 



8 . 6 



1.8 



16.1 



Av. 



.0 





.0 



.1 



.7 



.8 



3.7 



3.2 



2.8 



14.7 















June 











0300 









.3 



1.3 



.9 



2.1 



7.9 



3.1 



13.9 



0900 









.3 



1.3 



.9 



3.0 



7.0 



3.3 



14.2 



1200 









.3 



.4 



1.1 



4.2 



9.2 



3.4 



11.4 



1500 









.1 



.3 



1.0 



3.9 



9.6 



3.4 



11.7 



1800 









.1 



.4 



.6 



3.8 



9.1 



3.0 



13.0 



2100 









.1 



.2 



.3 



2.9 



8.9 



3.4 



14.2 



Av. 









.2 



.6 



.8 



3.4 



8.6 



3.3 



13.1 















July 











) 300 





0.1 





1.4 



1.9 



2.2 



2.9 



6.8 



1.6 



14.1 



0900 









1.2 



3.0 



1.7 



4.4 



6.6 



1 . 4 



12.7 



1200 









1.0 



2.1 



2.6 



5.8 



6.2 



2.0 



11.3 



1500 









.4 



2.1 



2.4 



5.4 



6.4 



3.6 



10.7 



1800 









.7 



1.0 



1.8 



5.2 



7.2 



3.4 



11.7 



2100 









.4 



1.7 



: .7 



3.1 



8.2 



.'.7 



13.2 



Av. 





.0 





.8 



2.0 



. 1 



4.5 



6.9 



.4 



12.3 













August 











0300 





.3 



.2 



.7 



2.1 



2.1 



5.7 



9.4 



1.6 



8.9 



0900 





.1 



.2 



1.0 



3.6 



3.4 



3.1 



8.4 



2.2 



9.0 



1200 







.3 



.4 



2.4 



3.6 



6.3 



6.3 



2.9 



8.8 



1500 









.6 



1.8 



2.9 



7.2 



7.6 



2.6 



8.3 



1800 









.1 



1.1 



2.2 



5.7 



9.7 



2.1 



10.1 



2100 











1.6 



2.7 



5.2 



9.1 



2.4 



10.0 



Av. 





.1 



.1 



.5 



2.1 



2.8 



5.5 



8.4 



. 



9.2 



Time 

 of 









Ceiling in hundreds 



of feet 











day 







1-2 



3-4 



5-9 



10-19 20-29 



30-49 



50-95 



2i 



-199 



Unlim . 



April 



0300 



0.1 



0.2 



. 6 



0.4 



2 . 4 



2 , g 



4 1 3 



4.6 



1 







0900 





t ]_ 



_ 4 



1 . 1 



2.2 



1 . 6 



4.0 



5.7 





3 



14 1 



1200 





.1 



.2 



.3 



1.9 



1 .6 



4.4 



5.3 



1 



3 



14.9 



1500 







.1 



1.1 



1.6 



1 . 8 



3.2 



5.3 



1 



.9 



15.0 



1800 



.1 





.1 



.8 



2.6 



1.6 



3.1 



4.2 



2 



1 



15.4 



2100 







. 3 



1.0 



2.1 



1.8 



2.7 



4. 4 



1 



8 



15.9 



Av . 



.0 



.1 



. ' 



.8 



2.1 



May 



1.8 



; , , 



5.0 



1 



.5 



14.8 



0300 



. 1 



.1 



.8 



1.7 



2.0 



. 9 



3.9 



7 . 1 



1 



.6 



12 . 8 



0900 







i 



2.3 



1 _ g 



] _ ] 



4_q 



6.2 



1 



.4 





1200 







.1 



1.6 



1.8 



1.2 



4.1 



6.7 



1 



.3 



14.2 



1500 





.1 



.4 



1.1 



1.4 



1.9 



3.8 



7.2 



1 



.6 



13.5 



1800 





.4 



.4 



.7 



1.2 



1.6 



3.2 



8 . a 



2 



.6 



12.4 



: !;::.) 



.2 



.2 



.8 



. 9 



1.0 



1.3 



2 . 5 



8.1 



] 



.8 



14.2 



Av. 



.1 



.1 



. 4 



1 . 4 



1.5 



1 . 3 



3.6 



7.3 



1.8 



13.5 













June 















0300 



. l 



. 4 



. 4 



1 . 1 



2 . 9 



. ; 



3.1 



6.0 



1 



.6 



10.0 



0900 





.2 



.3 



1.2 



3.0 



2.7 



4.6 



6.0 



1.1 



10.9 



1200 





.3 



.2 



1.4 



2.4 



2.3 



5.4 



5.1 



1 



.8 



11.1 



1500 





.3 



.2 



1.3 



2.6 



1.9 



4.9 



6.6 



1 



.2 



11.0 



1800 





. 3 



.3 



1.2 



2.1 



1.4 



4.3 



7.1 



1 



.5 



11.8 



2100 



. i 



. 6 



. 3 





2.0 



1.7 



4. 4 



6.9 



I 



.3 



11 . 6 



Av . 





. 4 



. 3 



1.2 



2.5 



July 



2.1 



4.4 



6.6 



1 



.4 



11 . 1 



0300 







.2 



1.4 



5.2 



4.0 



4.9 



5 . 8 



1 



. 3 



8.2 



0900 









2.3 



4.7 



3.7 



5 . 2 



5.0 



1 



.6 



8.7 



1200 









2 . 2 



4.3 



' .?. 



4.6 



5.9 



1 



.6 



8.6 



1500 







.4 



.8 



4.6 



2.3 



6.6 



5.2 



1 



.4 



9.7 



1800 







.1 



.9 



4.3 



3.3 



5.6 



6.7 



1 



.8 



8.3 



2100 





.1 



.2 



.9 



5.1 



3 .. 8 



4.8 



6.3 



] 



.1 



8.7 



Av. 





.0 



.2 



1.4 



4.7 



3.5 



5.2 



5.8 



1 



.5 



8.7 













August 













0300 





.1 



.2 



1.6 



5.1 



4.7 



6.7 





1 



.0 



5.4 



0900 









2.0 



4.7 



4.3 



6.0 



5.7 



2 



.0 



6.3 



1200 





.1 





1.6 



3.9 



6.4 



6.2 



4.6 



2 



.2 



6.0 



1500 





.2 





.8 



4.8 



3.9 



7.1 



6.9 



1 



.7 



5.6 



1800 





.1 





1.1 



3.8 



4.1 



6.7 



7.9 



1 



.8 



5.5 



2100 







.3 



1 . c 



4.0 



3.3 



5.8 



7.0 



1 



.7 



7.1 



Av. 





.1 



.1 



1.5 



4.4 



4.4 



6.4 



6.4 



1 



.7 



6.0 



Source: United States Weather Bureau coded data. 



137 



