Kansas City
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kansas City clear sky chart from 2005-11-05 to 2017-08-12.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.
Observation TypeMinimum conditions for hour to be usableOut of hours
Clear of CloudsTransparencySeeingSky Brightness
Planetary:50%(no limit)Average(no limit)Nighttime Hours
Deep Sky:70%Average(no limit)5.9Nighttime Hours
CCD Imaging:70%Below AveragePoor(no limit)Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

PlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
Night
40%
15780
23%
46604
13%
15733
49%
15733
31%
27915

By Month

MonthDays of MonthPlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
January1st to 15thNight
29%
900
23%
2327
9%
895
40%
895
32%
1458
January16th to endNight
26%
960
25%
2496
8%
960
37%
960
31%
1591
February1st to 15thNight
21%
879
16%
2288
5%
875
29%
875
23%
1617
February16th to endNight
24%
672
24%
1934
7%
672
37%
672
28%
1187
March1st to 15thNight
31%
540
22%
1980
12%
540
44%
540
24%
1141
March16th to endNight
25%
576
15%
2112
9%
576
34%
576
18%
1392
April1st to 15thNight
31%
539
21%
1848
13%
539
46%
539
27%
1064
April16th to endNight
29%
540
21%
1713
13%
540
43%
540
24%
1104
May1st to 15thNight
37%
539
19%
1620
14%
539
45%
539
26%
1043
May16th to endNight
44%
563
20%
1631
14%
561
52%
561
33%
985
June1st to 15thNight
61%
540
20%
1440
11%
540
65%
540
42%
820
June16th to endNight
57%
540
26%
1440
14%
540
62%
540
53%
764
July1st to 15thNight
68%
510
18%
1514
14%
510
71%
510
43%
829
July16th to endNight
70%
564
26%
1594
24%
531
75%
531
44%
829
August1st to 15thNight
73%
527
25%
1575
28%
524
76%
524
45%
820
August16th to endNight
67%
525
26%
1663
28%
525
71%
525
40%
895
September1st to 15thNight
61%
495
28%
1688
29%
495
65%
495
31%
963
September16th to endNight
60%
492
29%
1815
24%
492
69%
492
34%
920
October1st to 15thNight
42%
657
30%
1977
21%
657
49%
657
36%
1125
October16th to endNight
36%
704
28%
2112
14%
704
48%
704
35%
1175
November1st to 15thNight
38%
758
29%
2158
13%
758
51%
758
39%
1183
November16th to endNight
30%
900
24%
2513
10%
900
41%
900
32%
1518
December1st to 15thNight
28%
900
18%
2520
7%
900
37%
900
24%
1676
December16th to endNight
26%
960
21%
2646
7%
960
37%
960
23%
1816

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

Occurrence of each ForecastData
Points
Cloud CoverDay
12%6%25%42445%7%43%
47354
Night
11%6%24423446%49%
46799
TransparencyDay
40%413%25%14%2
47054
Night
35%312%27%17%3
46604
SeeingDay
14%8%27%29%16%3
5764
Night
14%9%31%31%11%1
15782

By Month

Percentage Cloud Cover SE (2006-)
Color Meanings:
Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
11%6%26%5%33336%45%
1611
16th to endDay
12%11%46%314435%40%
1728
February1st to 15thDay
13%8%5%5%5%3335%6%38%
1575
16th to endDay
12%10%46%5%23345%41%
1549
March1st to 15thDay
12%9%46%424447%36%
1980
16th to endDay
21%10%46%42333434%
2110
April1st to 15thDay
16%8%25%433346%41%
2100
16th to endDay
20%7%35%5%2445%7%32%
2244
May1st to 15thDay
18%8%36%5%34345%36%
2331
16th to endDay
14%6%35%5%25%45%8%37%
2481
June1st to 15thDay
8%5%24435%5%6%9%43%
2520
16th to endDay
5%313435%5%7%10%49%
2520
July1st to 15thDay
8%314435%6%6%9%45%
2352
16th to endDay
6%3146%35%6%6%8%48%
2466
August1st to 15thDay
7%3144345%7%10%47%
2289
16th to endDay
10%41443445%7%48%
2185
September1st to 15thDay
13%5%245%23347%46%
1939
16th to endDay
8%4235%245%5%7%51%
1805
October1st to 15thDay
13%5%3432335%5%50%
1650
16th to endDay
13%5%1432335%6%50%
1760
November1st to 15thDay
10%5%13313446%55%
1698
16th to endDay
17%7%24312335%48%
1446
December1st to 15thDay
14%11%35%5%23446%38%
1440
16th to endDay
14%9%37%42435%7%36%
1575
January1st to 15thNight
8%6%25%5%23346%49%
2327
16th to endNight
10%8%35%433336%47%
2496
February1st to 15thNight
11%10%46%5%34446%37%
2278
16th to endNight
11%7%35%323345%48%
1934
March1st to 15thNight
12%6%35%323446%46%
1980
16th to endNight
19%8%3442335%6%37%
2112
April1st to 15thNight
12%6%24323436%50%
1848
16th to endNight
19%6%25%423345%42%
1713
May1st to 15thNight
12%6%25%6%24446%43%
1619
16th to endNight
10%425%424348%49%
1629
June1st to 15thNight
5%3143345%6%9%52%
1440
16th to endNight
4123245%5%10%59%
1440
July1st to 15thNight
6%2123245%6%9%52%
1604
16th to endNight
422332448%9%53%
1702
August1st to 15thNight
3223325%5%6%10%55%
1585
16th to endNight
7%424323436%57%
1663
September1st to 15thNight
10%435%32345%7%48%
1688
16th to endNight
6%3234245%5%6%54%
1815
October1st to 15thNight
14%5%1321234455%
1977
16th to endNight
11%5%23312335%57%
2112
November1st to 15thNight
8%423313236%58%
2158
16th to endNight
15%6%23323235%51%
2513
December1st to 15thNight
14%8%35%4245%45%41%
2520
16th to endNight
16%9%45%423445%40%
2646

Transparency (when cloud cover <= 30%)
Color Meanings:
Too cloudy to forecast Poor Below Average Average Above average Transparent
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
42%311%24%16%1
1612
16th to endDay
46%215%23%10%1
1728
February1st to 15thDay
47%315%23%8%1
1576
16th to endDay
44%215%22%13%2
1549
March1st to 15thDay
46%312%24%10%1
1980
16th to endDay
54%313%18%8%1
2112
April1st to 15thDay
44%312%23%15%
2100
16th to endDay
51%412%20%11%
2244
May1st to 15thDay
49%411%23%10%
2331
16th to endDay
43%6%15%21%11%1
2485
June1st to 15thDay
35%5%14%28%13%1
2520
16th to endDay
27%6%17%30%16%2
2520
July1st to 15thDay
33%6%16%27%13%2
2213
16th to endDay
29%5%14%33%15%1
2311
August1st to 15thDay
30%6%16%28%16%1
2275
16th to endDay
33%6%11%25%16%6%
2185
September1st to 15thDay
38%310%22%18%6%
1939
16th to endDay
31%311%30%20%1
1805
October1st to 15thDay
35%29%29%19%4
1650
16th to endDay
34%311%26%19%4
1760
November1st to 15thDay
30%312%28%21%4
1698
16th to endDay
39%110%29%17%
1446
December1st to 15thDay
47%315%23%9%
1440
16th to endDay
48%313%22%10%2
1575
January1st to 15thNight
36%214%26%18%1
2327
16th to endNight
38%213%27%15%1
2496
February1st to 15thNight
48%311%22%12%1
2288
16th to endNight
38%212%23%20%2
1934
March1st to 15thNight
38%311%26%15%3
1980
16th to endNight
48%412%22%10%2
2112
April1st to 15thNight
36%39%27%19%2
1848
16th to endNight
43%310%24%16%1
1713
May1st to 15thNight
41%413%23%16%1
1620
16th to endNight
34%5%16%26%14%1
1631
June1st to 15thNight
27%418%31%16%2
1440
16th to endNight
19%415%35%22%2
1440
July1st to 15thNight
26%414%33%16%3
1514
16th to endNight
23%413%36%19%2
1594
August1st to 15thNight
22%5%16%33%18%2
1575
16th to endNight
28%38%28%23%7%
1663
September1st to 15thNight
34%49%23%21%7%
1688
16th to endNight
28%49%30%24%3
1815
October1st to 15thNight
32%27%28%22%6%
1977
16th to endNight
30%29%29%23%4
2112
November1st to 15thNight
28%213%24%23%8%
2158
16th to endNight
36%210%30%18%2
2513
December1st to 15thNight
44%314%25%11%
2520
16th to endNight
47%312%21%12%2
2646

Seeing (when cloud cover <= 80%)
Color Meanings:
Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
23%22%33%18%2
90
16th to endDay
23%18%40%12%4
96
February1st to 15thDay
14%26%36%17%4
90
16th to endDay
17%27%32%17%6%
81
March1st to 15thDay
18%26%44%8%1
90
16th to endDay
30%17%34%16%1
96
April1st to 15thDay
21%14%29%25%8%
219
16th to endDay
25%12%35%17%8%
354
May1st to 15thDay
21%10%33%24%8%
468
16th to endDay
19%9%35%21%11%2
517
June1st to 15thDay
9%5%29%34%17%3
495
16th to endDay
6%334%35%16%2
495
July1st to 15thDay
13%119%39%20%4
475
16th to endDay
6%16%41%29%5%
515
August1st to 15thDay
6%113%39%32%6%
474
16th to endDay
11%413%35%27%7%
353
September1st to 15thDay
12%320%37%20%6%
214
16th to endDay
6%327%36%14%11%
90
October1st to 15thDay
10%7%32%28%13%7%
90
16th to endDay
10%9%40%35%4
96
November1st to 15thDay
46%30%35%18%4
90
16th to endDay
37%16%26%14%4
90
December1st to 15thDay
17%26%33%13%44
90
16th to endDay
21%27%36%12%2
96
January1st to 15thNight
12%15%38%25%7%
900
16th to endNight
13%13%41%26%3
960
February1st to 15thNight
16%14%40%25%3
880
16th to endNight
16%14%40%23%4
672
March1st to 15thNight
17%10%35%29%6%
540
16th to endNight
24%11%35%23%4
576
April1st to 15thNight
14%12%36%30%5%
539
16th to endNight
23%10%33%26%6%
540
May1st to 15thNight
16%6%33%31%10%1
540
16th to endNight
12%5%33%35%11%1
563
June1st to 15thNight
6%423%45%18%1
540
16th to endNight
5%232%41%16%1
540
July1st to 15thNight
9%16%47%24%1
510
16th to endNight
6%15%45%30%
564
August1st to 15thNight
5%13%46%33%1
527
16th to endNight
9%114%38%31%3
525
September1st to 15thNight
14%215%42%20%4
495
16th to endNight
8%321%39%23%3
492
October1st to 15thNight
17%6%29%28%15%2
657
16th to endNight
15%10%33%29%10%
704
November1st to 15thNight
11%11%34%29%11%
758
16th to endNight
19%13%35%25%6%
900
December1st to 15thNight
20%13%35%26%5%
900
16th to endNight
21%11%34%27%4
960
Page generated at 2017-08-13 13:16:48. Version ac04

Copyright 2017 A. Danko


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