Table 31. --Height of ceiling by hour of day, and number of days per month in each height class 



(Av. 1950-56) 



ANCHORAGE BETHEL 



Time 

 of 









Ceiling in 



hundreds 



of feet 









Time 

 of 









Ceiling in hundreds 



of f6et 









day 







1-2 



3-4 



5-9 10-19 



20-29 



30-49 



50-95 





Unlim. 



day 







i-a 



3-4 



5-? 



10-19 20-29 



30-49 



50-95 



96-199 



Unlim. 













April 





















April 











0300 

 0900 

 1200 

 1500 

 1600 

 2100 





0.1 



0.2 



0.4 1.1 

 .8 .3 

 .3 1.0 

 .6 .3 

 .6 .9 

 .2 1.3 



0.9 

 .8 

 .4 

 1.3 

 1.1 

 .8 



2.3 

 1.3 

 1.7 

 2.4 

 2.0 

 2.3 



6.7 

 7.1 

 8.4 

 8.1 

 8.8 

 8.9 



3.8 

 3.7 

 2.7 

 2.7 

 2.6 

 2.9 



14.7 

 15.8 

 15.6 

 14.6 

 14.0 

 13.6 



0300 

 0900 

 1200 

 1600 

 1800 

 2100 





0.3 

 .3 



.1 

 .2 

 . ] 



0.2 

 .6 

 .2 

 .2 

 .2 

 .7 



2 . 5 



.2 . 6 

 2.1 



.. 



3.3 



2.4 3.1 

 3.3 1.8 

 4.3 2.2 

 3.9 2.3 

 2.1 1.8 

 1.1 2.3 



3.2 

 2.3 

 3.7 

 3.1 

 3.2 

 4.5 



2.7 

 3.3 

 3.6 



2.7 



2.8 



1.8 



1.9 



L . . 

 2.7 

 3.6 

 1.7 



14.0 

 12.7 

 12.2 

 12.8 

 13.2 

 13.5 



Av. 





.0 



.0 



.5 .8 



.9 



2.0 



6.0 



3.1 



14.7 



Av. 







.4 



2.8 



2.6 2.2 

 May 



3. 3 



3.0 



2.2 



1 



0300 

 0900 

 1200 

 1500 

 1800 

 2100 







.1 

 .1 



.1 .7 

 1.0 

 .6 

 .4 

 .4 

 .7 



.7 

 .7 



.4 

 .9 



- .6 

 .7 



2.9 

 3.4 

 3.7 

 3.8 

 3.3 

 3.0 



13.2 

 10.3 

 10.3 

 11.6 

 13.2 

 11.7 



2.7 

 2.9 

 4.1 

 3.0 

 2.9 

 3.8 



10.6 

 12.6 

 11.9 

 11.3 

 10.6 

 11.1 



0300 

 0900 

 1200 

 1500 

 1800 

 2100 



0.1 



.4 



.4 

 .2 



.1 



1.9 

 4.9 

 1.3 

 .8 

 .7 

 .9 



3.3 1.8 

 3.1 .8 

 4.3 4.2 

 4.3 3.9 

 2.8 3.0 

 3.0 2.7 



5.8 

 2.8 

 6.1 

 7.9 

 6.7 

 5.1 



6.3 



4.7 

 2.9 



6.9 

 5.6 



1.9 

 3.2 

 1.9 

 1.7 

 1.2 

 1.4 



9.1 

 9.7 

 8.5 

 9.5 

 10.7 

 12.1 



Av. 







.0 



.0 .6 



.7 



June 



3.4 



11.7 



3.2 



11.4 



Av. 



.0 



.1 



.1 



1.8 



3.5 2.7 

 June 



5.7 



5.3 



1.9 



9.9 



0300 

 0900 

 1200 

 1600 

 1800 

 2100 







.1 



.8 .9 



.2 2.2 

 .2 .7 

 .3 



.2 .3 

 .2 .4 



.9 

 1.9 

 1.6 

 .7 

 .8 

 1.0 



5.0 

 3.1 

 3.4 

 2.6 

 2.4 

 ■'.« 



8.6 

 7.7 

 8.4 



10.2 

 9.0 

 9.4 



3.8 

 4.4 

 3.9 

 3.4 

 4.6 

 4.7 



9.9 

 10.5 

 11.8 

 12.8 

 12.7 

 11.5 



0300 

 0900 

 1200 

 1500 

 1800 

 2100 





.8 



1.1 



.1 



.2 



3.0 

 4.6 

 l.ti 

 .8 

 1..: 

 1.1 



2.4 3.0 

 6.4 2.9 

 6.4 4.3 

 4.7 4.9 

 3.0 4.6 

 2.7 3.5 



5.1 

 3.1 

 4.6 

 5.9 

 6.7 

 5.3 



4.9 

 6.1 

 4.0 

 4.3 

 4.2 

 5.1 



! . -■ 

 1.7 

 1.6 

 1.4 

 2.1 

 1.9 



8.3 

 6.1 

 7.1 



e.o 



8.3 



. ; 



Av. 







.0 



.3 .8 



1.2 

 July 



3.2 



8.9 



4.1 



11.5 



Av. 





.1 



.2 



2.1 



4.3 3.9 

 July 



5.1 



4.6 



1.7 



8.0 



0300 

 0900 

 1200 

 1500 

 1800 

 2100 







.1 

 .1 



.4 1.8 

 1.4 2.7 

 .7 2.0 

 .4 1.2 

 .3 .9 

 .4 .7 



1.6 

 1.7 

 1.2 

 .9 

 .9 

 1.3 



4.4 

 2.1 

 2.4 

 3.2 

 3.4 

 3.7 



10.8 

 8.6 

 8.2 

 8.9 

 10.7 

 10.0 



1.4 

 2.3 

 3.7 

 3.3 

 2.6 

 2.8 



10.5 

 12.2 

 12.8 

 13.1 

 12.2 

 12.0 



0300 

 0900 

 1200 

 1500 

 1800 

 2100 



.1 



.1 



.9 

 1.2 



.2 



.1 

 .6 



5.6 

 3.3 

 6.0 

 3.2 

 3.3 

 3.4 



5.2 1.9 

 4.9 1.8 



6.8 4.6 

 7.1 4.3 

 5.0 3.9 



3.9 2.6 



5.0 

 2.6 

 3.2 

 4.2 

 4.9 

 4.3 



4.9 

 4.6 

 4.2 

 4.3 

 3.8 

 5.6 



1.1 

 1.9 

 1.4 

 1.6 

 2.4 

 1.9 



6.0 

 5.8 

 5.6 

 6.3 

 7.6 

 8.7 



Av. 







.0 



.6 1.6 



1.3 

 August 



3.2 



9.5 



2 . 7 



12.1 



Av. 



.0 



.0 



.5 



4.8 



5.5 3.2 

 August 



4.0 



4.6 



1.7 



6.7 



0300 

 0900 

 1200 

 1600 

 1800 

 2100 





.3 

 .1 



.1 



.2 

 .2 



.1 



.2 1.1 

 1.0 1.6 

 .7 .9 



.2 .8 

 .6 .6 

 1.0 



1.0 

 1.0 

 .9 

 .7 

 .4 

 .9 



4.3 

 3.6 



3.2 

 3.3 

 4.2 

 4.8 



13.6 

 11.4 



10.9 

 11.6 

 10.8 

 11.7 



1.9 

 2.7 

 4.1 

 3.2 

 3.7 

 2.4 



8.4 

 9.4 

 10.3 

 11.2 

 10.7 

 10.0 



0300 

 0900 

 1200 

 1500 

 1800 

 2100 





1.0 

 .3 



1.4 

 1.2 

 .4 



.6 

 .8 



5.0 

 9.7 

 6.3 

 5. : 

 4.6 

 5.5 



4.6 4.6 

 6.6 2.7 

 8.3 4.2 

 6.8 6.4 



5.3 3.9 



5.4 3.7 



5.2 

 3.2 

 3.9 

 4.3 

 5.4 

 3.8 



3.6 

 3.7 

 3.8 

 3.8 

 4.7 

 4.8 



1.2 

 .8 

 .7 

 1.3 

 1.2 

 1.4 



4.4 

 2 . 8 

 3.4 

 3.2 

 5.3 

 5.6 



A". 





.1 



.1 



.4 1.0 



.8 



3.9 



11.7 



3.0 



10.0 



Av. 





.2 



.8 



6.0 



6.2 4.2 



4. ' 



4.1 



1.1 



4.1 



BETTLES 



Time 



of 









Ceiling in 



hundreds 



of feet 









day 







1-2 



3-4 



5-9 



10-19 



20-29 



30-49 



50-95 



92 -192 



Unlim. 



April 



0300 

 0900 

 1200 

 1600 

 1800 

 2100 









0-2 

 .3 



.2 

 .1 

 .1 



1.0 

 .7 

 .8 

 .6 

 .7 

 .3 



1.3 

 .8 

 .7 

 1.0 

 1.0 

 .8 



1.8 

 1.9 

 1.7 

 2.4 

 1.3 

 1.3 



6.9 

 5.7 

 5.0 

 4.3 

 4.7 

 5.7 



2.0 

 2.7 

 3.1 

 2.4 

 2.2 

 3.1 



16.8 

 17.9 

 18.7 

 19.1 

 20.0 

 18.7 



Av. 









.2 



.7 



.9 



1.7 



5.4 



. 



18.! 



BIG DELTA, 



Time 

 of 









Ceiling in 



hundreds 



of feet 









day 







1-2 



3-4 



5-9 



10-19 



20-29 



30-49 



50-95 



96-199 



Unlim. 



April 



0300 

 0900 

 1200 

 1500 

 1800 

 2100 









0.2 

 .3 



.2 



0.8 

 1.6 

 1.1 

 .7 

 .8 

 .4 



0.6 

 .9 

 1 . 1 

 1.2 

 .8 

 .6 



2.2 

 1.4 

 1.9 

 3.0 

 1.4 

 1.8 



3.8 

 2.4 

 2.9 

 2.1 

 3.9 

 3.3 



4.8 

 3.7 

 3.4 



4.2 

 3.7 



17.6 

 19.7 

 19.6 

 19.0 

 17.9 

 20.0 



Av. 









.1 



.9 



.9 



2.0 



.'.1 





i :> . • 



May May 



.•• : : 





0.1 



.2 



.4 



.7 



2.0 



10.6 



1.7 



15.3 



0300 



.2 



.8 



.8 



2.7 



5.7 



: 



2 



15.6 



0900 







.1 



.7 



1.2 



2.3 



6.8 



1.9 



18.0 



0900 



.4 



.9 



1.0 



2.4 



3.1 



4 



2 



19.0 



1200 



0.1 





.1 



.4 



.8 



3.8 



7.4 



2.7 



15.7 



1200 



.1 



i . 9 



.8 



4.1 



6.0 



3 



9 



16.1 



1500 







.2 



.4 



.4 



2.9 



10.1 



3.2 



13.8 



1500 



.1 



.7 



.7 



3.7 



5.8 



4 



4 



15.6 



1800 









.3 



.8 



1.9 



9.7 



3.2 



15.1 



1800 



.1 



.8 



.6 



1.7 



5.9 



5 



9 



15.1 



2100 









.8 



.2 



1.5 



9.1 



3.1 



15.8 



21 ■>■ 



.2 



.7 



.7 



2.1 



6.1 



■i 



4 



16.8 



Av. 



.0 



.0 



.1 



.6 



.7 



2.4 



9.0 



2.7 



15.6 



Av. 



.2 



.8 



.8 



2.8 



5.3 



4 



7 



16.4 



June June 



0300 





.3 



.7 



l.l 



10.3 



1.8 



15.8 



0300 



.3 



.7 



.8 



2 



2 



7.3 



4.3 



1-1 . -1 



0900 



. 3 



.7 



1.2 



2.3 



8.0 



2.6 



14.9 



0900 



.2 



1.3 



1.2 



2 



2 



5.3 



4.3 



15.5 



1200 





1.0 



.6 



3.2 



9.3 



2.0 



13.9 



1200 



.1 



.8 



1.3 



3 



2 



4.7 



3.9 



16.0 



1500 



.2 



.3 



1.0 



3.4 



8.0 



2.3 



14.8 



1500 



.3 



.2 



1.1 





7 



7.3 



4.6 



13.8 



1800 





.6 



1.0 



1.7 



8.2 



3.3 



15.2 



1800 



.1 





.8 



2 



9 



5.4 



5 .2 



15.6 



2100 



.1 







,9 



9.5 



2.6 



16.3 



2100 





.4 



.8 



2 



7 



7.1 



4.4 



14.6 



Av. 



.1 



.5 



.a 



2.1 



8.9 



2.4 



15.2 



Av. 



.2 



.6 



1.0 



2 



6 



6.2 



4.4 



15.0 



July 



0300 . 6 1.0 1.1 3.0 9.3 1.8 14.2 



0900 .3 2.4 1.6 3.1 7.3 2.7 13.6 



1200 .3 1.9 1.3 4.7 8.0 2.2 12.6 



1500 .1 1.3 .4 4.7 9.1 1.8 13.6 



1800 .1 .8 1.3 2.4 9.4 1.3 15.7 



2100 .1 .9 1.1 2.3 9.0 1.6 16.0 



Av. .2 1.4 1.1 3.4 8.7 1.9 14.3 



July 



0300 0.1 .8 1.7 . 7 3.7 7.8 3.7 12.5 



0900 1.1 2.9 .9 2.0 4.7 5.0 14.4 



1200 .4 1.8 .9 1.8 5.6 5.1 15.4 



1500 .1 1.0 .9 3.1 5.3 5.0 15.6 



1800 .3 .8 .3 2.2 6.9 4.3 16.2 



2100 .1 .4 1.2 3.0 8.0 3.8 14.5 



Av. .0 .5 1.4 .8 2.6 6.4 4.5 14.8 



August 



0300 .2 1.3 1.4 1.3 4.4 12.0 1.3 9.1 



0900 .1 1.6 3.3 2.2 4.3 8.1 2.2 9.2 



1200 .8 2.2 3.0 4.8 7.9 3.6 8.7 



1500 .4 1.1 3.1 3.7 10.3 2.3 10.1 



1800 .2 1.6 1.8 3.2 10.3 1.9 12.0 



2100 .1 1.1 2.1 3.0 10.8 2.0 11.9 



Av. .1 .7 1.8 2.2 3.9 9.9 2.2 10.2 



August 



0300 .1 .7 1.2 1.3 6.1 7.4 3.3 11.9 



0900 1.4 2.9 .9 1.2 5.4 4.8 14.4 



1200 .9 2.0 .9 2.3 4.4 4.3 16.2 



1500 .6 .8 1.1 1.9 5.1 5.9 15.6 



1800 . .1 .6 1.0 1.4 8.1 5.3 13.5 



2100 .3 .9 1.3 2.9 8.4 4.9 12.3 



Av. .0 .7 1.4 1.1 2.5 6.5 4.8 14.0 



133 



