| Cloud Cover |
| Overcast |
90% covered |
80% covered |
70% covered |
60% covered |
50% covered |
40% covered |
30% covered |
20% covered |
10% covered |
Clear |
|
| Transparency |
| Poor |
Below Average |
Average |
Above average |
Transparent |
|
| Seeing |
| Bad 1/5 |
Poor 2/5 |
Average 3/5 |
Good 4/5 |
Excellent 5/5 |
|
| Darkness |
| -4 |
-3 |
-2 |
-1 |
0 |
1.0 |
2.0 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.2 |
5.4 |
5.6 |
5.8 |
6.0 |
6.2 |
6.4 |
6.6 |
|
| Blank |
|
| Smoke |
| No Smoke |
2 ug/m^3 |
5 ug/m^3 |
10 ug/m^3 |
20 ug/m^3 |
40 ug/m^3 |
60 ug/m^3 |
80 ug/m^3 |
100 ug/m^3 |
200 ug/m^3 |
500 ug/m^3 |
|
| Wind |
| >45 mph |
29 to 45 mph |
17 to 28 mph |
12 to 16 mph |
6 to 11 mph |
0 to 5 mph |
|
| Humidity |
| <25% |
25% to 30% |
30% to 35% |
35% to 40% |
40% to 45% |
45% to 50% |
50% to 55% |
55% to 60% |
60% to 65% |
65% to 70% |
70% to 75% |
75% to 80% |
80% to 85% |
85% to 90% |
90% to 95% |
95% to 100% |
|
| Temperature |
| < -40F |
-40F to -31F |
-30F to -21F |
-21F to -12F |
-12F to -3F |
-3F to 5F |
5F to 14F |
14F to 23F |
23F to 32F |
32F to 41F |
41F to 50F |
50F to 59F |
59F to 68F |
68F to 77F |
77F to 86F |
86F to 95F |
95F to 104F |
104F to 113F |
>113F |
|
