Wichita
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Wichita 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
46%
15731
26%
46550
16%
15685
55%
15685
38%
26058

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
36%
900
30%
2327
13%
895
48%
895
40%
1360
January16th to endNight
39%
960
34%
2496
15%
960
50%
960
44%
1417
February1st to 15thNight
33%
830
22%
2238
9%
826
41%
826
32%
1407
February16th to endNight
33%
632
29%
1894
11%
632
46%
632
35%
1055
March1st to 15thNight
36%
576
25%
2016
15%
576
47%
576
30%
1104
March16th to endNight
33%
576
19%
2112
12%
576
43%
576
25%
1227
April1st to 15thNight
31%
539
22%
1926
13%
539
46%
539
29%
1063
April16th to endNight
33%
540
21%
1620
15%
540
44%
540
29%
986
May1st to 15thNight
39%
539
22%
1620
16%
539
49%
539
31%
967
May16th to endNight
50%
562
19%
1684
17%
561
55%
561
36%
983
June1st to 15thNight
55%
540
18%
1620
11%
540
61%
540
41%
868
June16th to endNight
64%
540
24%
1620
16%
540
71%
540
52%
797
July1st to 15thNight
72%
510
20%
1530
18%
510
74%
510
43%
815
July16th to endNight
77%
564
26%
1594
26%
531
79%
531
47%
819
August1st to 15thNight
76%
527
23%
1575
28%
524
77%
524
42%
851
August16th to endNight
70%
525
24%
1620
24%
525
74%
525
41%
873
September1st to 15thNight
57%
495
24%
1815
24%
495
64%
495
31%
979
September16th to endNight
58%
492
31%
1815
29%
492
65%
492
38%
897
October1st to 15thNight
48%
575
32%
1895
25%
575
55%
575
35%
1023
October16th to endNight
45%
704
35%
2112
17%
704
58%
704
50%
1018
November1st to 15thNight
44%
845
31%
2245
13%
845
56%
845
46%
1228
November16th to endNight
40%
900
30%
2340
12%
900
51%
900
42%
1349
December1st to 15thNight
37%
900
26%
2340
11%
900
47%
900
37%
1419
December16th to endNight
38%
960
29%
2496
14%
960
48%
960
36%
1553

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
9%42442445%7%50%
47424
Night
8%423323447%54%
46746
Cloud CoverDay
9%5%2442445%7%50%
47422
Night
8%423323347%54%
46746
TransparencyDay
32%412%27%18%4
47122
Night
29%312%27%21%5%
46551
SeeingDay
11%5%25%32%20%4
5699
Night
11%6%31%36%13%
15733

By Month

Percentage Cloud Cover SW (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
7%5%14413345%56%
1611
16th to endDay
8%5%14324448%52%
1728
February1st to 15thDay
7%7%35%423436%49%
1633
16th to endDay
8%6%1332345%7%53%
1580
March1st to 15thDay
11%6%25%424446%47%
1944
16th to endDay
16%8%25%423335%44%
2112
April1st to 15thDay
12%42443345%7%47%
2019
16th to endDay
15%6%25%5%33445%43%
2340
May1st to 15thDay
12%6%25%423447%45%
2331
16th to endDay
11%6%25%5%245%5%7%41%
2430
June1st to 15thDay
6%413425%45%8%53%
2340
16th to endDay
5%11232446%8%57%
2340
July1st to 15thDay
7%3135%25%5%6%10%47%
2340
16th to endDay
4214336%5%7%8%51%
2466
August1st to 15thDay
44245%35%6%6%9%48%
2289
16th to endDay
6%31442446%8%52%
2229
September1st to 15thDay
9%5%245%2445%6%48%
1815
16th to endDay
7%41332445%7%56%
1815
October1st to 15thDay
13%313322345%54%
1723
16th to endDay
7%424323346%58%
1760
November1st to 15thDay
5%313323436%61%
1611
16th to endDay
11%313312235%61%
1620
December1st to 15thDay
13%6%3331335%6%49%
1620
16th to endDay
11%7%45%424345%46%
1728
January1st to 15thNight
7%5%14324345%57%
2327
16th to endNight
7%42332323461%
2496
February1st to 15thNight
10%6%35%423336%49%
2228
16th to endNight
9%424323436%55%
1894
March1st to 15thNight
9%6%1442445%6%50%
2016
16th to endNight
16%6%23322346%47%
2112
April1st to 15thNight
13%413423348%49%
1926
16th to endNight
14%5%2342335%7%47%
1620
May1st to 15thNight
12%424422448%48%
1619
16th to endNight
8%4243345%7%9%47%
1683
June1st to 15thNight
431333345%11%53%
1620
16th to endNight
4122245%6%9%60%
1620
July1st to 15thNight
5%3133345%6%10%52%
1620
16th to endNight
331333447%12%52%
1702
August1st to 15thNight
32133346%6%10%52%
1585
16th to endNight
44244245%5%8%54%
1620
September1st to 15thNight
8%5%245%23346%51%
1815
16th to endNight
6%31431346%6%56%
1815
October1st to 15thNight
12%423323335%56%
1895
16th to endNight
7%312212235%67%
2112
November1st to 15thNight
6%323213346%62%
2245
16th to endNight
10%422222335%60%
2340
December1st to 15thNight
10%6%2332335%7%51%
2340
16th to endNight
11%6%24423346%49%
2496

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
7%5%24423345%56%
1611
16th to endDay
8%6%1432335%7%51%
1728
February1st to 15thDay
8%7%35%433436%49%
1633
16th to endDay
8%6%1342245%7%52%
1580
March1st to 15thDay
11%6%25%423446%47%
1944
16th to endDay
16%7%35%423336%43%
2110
April1st to 15thDay
12%425%43345%7%46%
2019
16th to endDay
15%6%25%5%23446%43%
2340
May1st to 15thDay
12%6%25%423447%45%
2331
16th to endDay
11%6%35%5%345%5%8%41%
2430
June1st to 15thDay
6%414325%45%8%52%
2340
16th to endDay
5%21332446%8%56%
2340
July1st to 15thDay
7%3145%245%6%10%47%
2340
16th to endDay
4213436%5%7%9%50%
2466
August1st to 15thDay
44245%35%5%6%9%47%
2289
16th to endDay
6%31442445%9%52%
2229
September1st to 15thDay
9%5%35%42435%7%48%
1815
16th to endDay
7%413324446%56%
1815
October1st to 15thDay
13%31332335%5%54%
1723
16th to endDay
7%323324346%58%
1760
November1st to 15thDay
5%3143235%36%61%
1611
16th to endDay
10%422312235%61%
1620
December1st to 15thDay
13%6%23313346%49%
1620
16th to endDay
12%7%35%424335%46%
1728
January1st to 15thNight
7%5%24324346%56%
2327
16th to endNight
7%423313235%61%
2496
February1st to 15thNight
10%7%35%324346%48%
2228
16th to endNight
8%424324346%54%
1894
March1st to 15thNight
9%6%2441445%7%49%
2016
16th to endNight
16%6%23422336%47%
2112
April1st to 15thNight
12%424323348%49%
1926
16th to endNight
13%6%14324347%46%
1620
May1st to 15thNight
12%414423447%48%
1619
16th to endNight
8%4243335%7%8%47%
1683
June1st to 15thNight
43234245%5%10%53%
1620
16th to endNight
41122245%5%9%60%
1620
July1st to 15thNight
5%213335%5%6%10%53%
1620
16th to endNight
321242447%13%52%
1702
August1st to 15thNight
42134346%6%10%51%
1585
16th to endNight
442442345%8%54%
1620
September1st to 15thNight
8%425%5%3345%6%51%
1815
16th to endNight
6%31332346%7%56%
1815
October1st to 15thNight
12%423323335%56%
1895
16th to endNight
7%312212235%67%
2112
November1st to 15thNight
6%313213246%62%
2245
16th to endNight
10%422322335%60%
2340
December1st to 15thNight
10%6%2332425%7%51%
2340
16th to endNight
11%6%25%42335%6%49%
2496

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
30%212%31%20%2
1612
16th to endDay
30%214%31%17%3
1728
February1st to 15thDay
36%414%27%13%4
1634
16th to endDay
30%313%29%19%3
1580
March1st to 15thDay
37%310%24%19%4
1944
16th to endDay
43%311%24%14%2
2112
April1st to 15thDay
36%413%26%16%2
2019
16th to endDay
41%311%27%12%2
2340
May1st to 15thDay
37%412%22%20%1
2331
16th to endDay
40%5%14%25%12%1
2434
June1st to 15thDay
28%5%16%26%18%3
2340
16th to endDay
23%5%14%29%22%5%
2340
July1st to 15thDay
30%5%15%28%17%2
2201
16th to endDay
24%6%14%30%19%3
2311
August1st to 15thDay
29%6%15%26%16%5%
2275
16th to endDay
29%5%12%29%15%7%
2229
September1st to 15thDay
35%412%23%15%8%
1815
16th to endDay
28%312%29%21%5%
1815
October1st to 15thDay
30%310%25%25%4
1723
16th to endDay
27%210%28%25%5%
1760
November1st to 15thDay
24%311%26%25%9%
1611
16th to endDay
27%29%31%24%4
1620
December1st to 15thDay
36%213%30%15%1
1620
16th to endDay
39%310%26%15%3
1728
January1st to 15thNight
29%28%30%24%3
2327
16th to endNight
27%211%30%23%4
2496
February1st to 15thNight
37%313%24%16%4
2238
16th to endNight
30%212%28%19%6%
1894
March1st to 15thNight
33%310%25%20%7%
2016
16th to endNight
38%312%25%16%2
2112
April1st to 15thNight
34%311%24%22%3
1926
16th to endNight
38%313%21%18%4
1620
May1st to 15thNight
35%413%24%18%3
1620
16th to endNight
31%5%21%24%14%2
1685
June1st to 15thNight
25%418%29%18%2
1620
16th to endNight
18%5%14%32%23%6%
1620
July1st to 15thNight
24%5%13%29%23%3
1530
16th to endNight
23%314%32%23%2
1594
August1st to 15thNight
24%5%16%29%17%5%
1575
16th to endNight
25%5%13%26%20%7%
1620
September1st to 15thNight
32%412%23%17%10%
1815
16th to endNight
26%310%24%28%6%
1815
October1st to 15thNight
31%310%22%24%8%
1895
16th to endNight
20%18%29%32%6%
2112
November1st to 15thNight
24%39%24%28%10%
2245
16th to endNight
28%27%29%24%7%
2340
December1st to 15thNight
32%312%30%18%1
2340
16th to endNight
35%213%27%14%6%
2496

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
12%12%33%34%5%2
90
16th to endDay
13%10%46%25%31
96
February1st to 15thDay
7%14%48%24%4
90
16th to endDay
312%46%32%31
81
March1st to 15thDay
14%11%48%22%3
90
16th to endDay
17%12%37%25%6%1
96
April1st to 15thDay
16%12%34%26%9%
138
16th to endDay
21%9%39%21%6%1
450
May1st to 15thDay
14%9%32%30%10%3
468
16th to endDay
18%7%29%28%11%3
517
June1st to 15thDay
7%325%36%24%1
495
16th to endDay
6%221%41%23%4
495
July1st to 15thDay
9%213%37%32%4
475
16th to endDay
6%7%37%37%9%
515
August1st to 15thDay
6%10%42%34%5%
474
16th to endDay
7%114%33%35%6%
397
September1st to 15thDay
5%117%47%24%3
90
16th to endDay
11%27%21%23%16%
90
October1st to 15thDay
8%6%24%34%14%11%
90
16th to endDay
4242%27%18%5%
96
November1st to 15thDay
4227%36%20%8%
90
16th to endDay
22%21%30%21%32
90
December1st to 15thDay
14%8%43%24%6%2
90
16th to endDay
19%11%38%21%8%
96
January1st to 15thNight
9%9%38%33%8%
900
16th to endNight
10%7%38%36%6%
960
February1st to 15thNight
14%10%36%34%5%
830
16th to endNight
11%12%37%32%5%
632
March1st to 15thNight
13%8%36%35%6%
576
16th to endNight
19%9%35%29%5%
576
April1st to 15thNight
17%9%39%26%7%
539
16th to endNight
17%9%36%29%7%
540
May1st to 15thNight
14%6%35%33%10%
540
16th to endNight
9%5%30%36%15%2
563
June1st to 15thNight
6%428%39%19%
540
16th to endNight
4225%47%18%
540
July1st to 15thNight
6%13%54%22%1
510
16th to endNight
5%18%47%34%2
564
August1st to 15thNight
5%9%51%31%1
527
16th to endNight
6%112%41%34%2
525
September1st to 15thNight
11%222%38%22%3
495
16th to endNight
10%322%37%22%2
492
October1st to 15thNight
16%329%28%19%2
575
16th to endNight
8%5%37%34%12%
704
November1st to 15thNight
9%8%34%34%13%
845
16th to endNight
13%9%34%33%8%
900
December1st to 15thNight
15%8%35%35%5%
900
16th to endNight
14%7%34%37%5%
960
Page generated at 2017-08-13 13:16:14. Version ac04

Copyright 2017 A. Danko


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