Fort Wayne
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Fort Wayne clear sky chart from 2005-11-05 to 2017-04-01.

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
38%
15343
16%
45297
11%
15300
43%
15300
21%
31404

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
18%
900
10%
2506
5%
895
23%
895
13%
1977
January16th to endNight
20%
897
10%
2625
4%
897
25%
897
12%
2035
February1st to 15thNight
19%
702
9%
2177
3%
701
24%
701
12%
1643
February16th to endNight
22%
631
13%
1893
6%
631
29%
631
14%
1400
March1st to 15thNight
29%
720
13%
2118
9%
720
31%
720
17%
1543
March16th to endNight
31%
756
17%
2100
8%
756
38%
756
21%
1485
April1st to 15thNight
31%
497
15%
1657
10%
497
39%
497
19%
1128
April16th to endNight
37%
495
20%
1510
10%
495
46%
495
24%
1012
May1st to 15thNight
34%
495
13%
1485
7%
495
39%
495
18%
1095
May16th to endNight
51%
514
15%
1510
11%
513
55%
513
29%
951
June1st to 15thNight
55%
495
18%
1320
12%
495
60%
495
34%
845
June16th to endNight
58%
495
15%
1320
11%
495
61%
495
31%
872
July1st to 15thNight
64%
465
18%
1240
15%
465
66%
465
37%
758
July16th to endNight
70%
522
17%
1355
14%
489
71%
489
38%
799
August1st to 15thNight
69%
494
23%
1474
18%
491
72%
491
36%
864
August16th to endNight
67%
525
18%
1682
16%
525
70%
525
32%
999
September1st to 15thNight
64%
577
27%
1732
25%
577
67%
577
35%
1002
September16th to endNight
61%
657
24%
1815
20%
657
63%
657
34%
1120
October1st to 15thNight
50%
660
25%
1845
20%
660
55%
660
32%
1139
October16th to endNight
30%
704
17%
2247
11%
704
38%
704
19%
1518
November1st to 15thNight
36%
700
23%
2276
17%
700
46%
700
25%
1398
November16th to endNight
27%
720
14%
2340
11%
720
32%
720
14%
1716
December1st to 15thNight
21%
762
8%
2382
4%
762
26%
762
11%
1873
December16th to endNight
16%
960
8%
2688
2%
960
20%
960
9%
2232

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
14%8%36%5%35%45%7%33%
45810
Night
15%8%36%5%2445%6%36%
45472
Cloud CoverDay
14%8%36%5%35%45%7%33%
45819
Night
15%8%46%5%24446%36%
45477
TransparencyDay
49%6%12%18%11%1
45503
Night
47%5%11%19%12%1
45297
SeeingDay
17%6%24%24%18%8%
5137
Night
19%8%27%29%14%1
15346

By Month

Percentage Cloud Cover NE (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
19%17%5%8%6%35%245%21%
1432
16th to endDay
13%19%8%10%7%34345%18%
1599
February1st to 15thDay
15%14%6%10%7%35%436%20%
1684
16th to endDay
15%14%6%11%6%35%436%22%
1580
March1st to 15thDay
20%12%5%7%7%25%35%5%24%
1832
16th to endDay
19%10%37%5%34446%29%
2133
April1st to 15thDay
20%9%36%5%2435%6%32%
1976
16th to endDay
19%7%35%424447%36%
2120
May1st to 15thDay
19%8%37%6%35%5%5%6%28%
2136
16th to endDay
11%5%26%5%46%46%7%38%
2251
June1st to 15thDay
12%5%25%5%36%46%8%38%
2310
16th to endDay
10%5%25%6%36%5%7%9%37%
2310
July1st to 15thDay
7%5%25%5%36%5%6%8%42%
2310
16th to endDay
6%436%5%36%7%7%10%38%
2402
August1st to 15thDay
7%425%5%45%6%6%8%42%
2145
16th to endDay
9%5%25%5%35%5%7%7%41%
2166
September1st to 15thDay
12%5%25%4345%5%6%45%
1887
16th to endDay
13%5%2442445%9%42%
1815
October1st to 15thDay
14%5%25%5%34445%42%
1785
16th to endDay
21%7%36%5%34447%30%
1624
November1st to 15thDay
14%7%24423446%45%
1582
16th to endDay
20%13%47%6%24345%26%
1620
December1st to 15thDay
18%16%7%8%6%34335%21%
1575
16th to endDay
22%15%7%10%6%24335%17%
1536
January1st to 15thNight
21%13%5%9%6%23335%24%
2506
16th to endNight
15%14%6%9%7%34336%24%
2625
February1st to 15thNight
16%13%5%7%5%34445%28%
2175
16th to endNight
16%11%47%7%44346%28%
1893
March1st to 15thNight
18%9%36%5%45%345%32%
2105
16th to endNight
14%8%46%5%3445%6%35%
2100
April1st to 15thNight
18%7%35%4345%5%7%35%
1657
16th to endNight
16%7%35%41345%6%40%
1510
May1st to 15thNight
20%7%35%6%26%45%6%30%
1485
16th to endNight
13%43441445%8%45%
1508
June1st to 15thNight
10%425%424448%47%
1320
16th to endNight
8%416%436%5%6%9%43%
1320
July1st to 15thNight
7%5%2442446%10%48%
1320
16th to endNight
6%32443446%9%49%
1456
August1st to 15thNight
5%4245%3445%9%48%
1485
16th to endNight
9%3244245%6%7%49%
1682
September1st to 15thNight
10%41342335%6%53%
1732
16th to endNight
13%424413446%50%
1815
October1st to 15thNight
11%5%2432345%7%48%
1845
16th to endNight
20%7%25%5%33346%36%
2247
November1st to 15thNight
14%8%24413347%43%
2276
16th to endNight
21%11%47%5%23346%28%
2340
December1st to 15thNight
20%13%6%7%5%34445%23%
2382
16th to endNight
24%14%6%8%6%24345%17%
2688

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
19%16%5%8%6%3434421%
1432
16th to endDay
13%18%8%11%6%4345%5%18%
1599
February1st to 15thDay
15%14%7%10%8%35%336%20%
1684
16th to endDay
15%14%6%10%7%34445%22%
1580
March1st to 15thDay
21%12%5%8%6%34446%24%
1842
16th to endDay
19%10%46%6%34446%29%
2132
April1st to 15thDay
19%9%35%6%24446%32%
1976
16th to endDay
19%6%35%424447%36%
2120
May1st to 15thDay
19%8%37%6%35%45%6%28%
2136
16th to endDay
11%5%26%5%36%46%7%39%
2251
June1st to 15thDay
12%5%25%446%5%6%8%38%
2310
16th to endDay
10%5%25%5%36%6%7%9%37%
2310
July1st to 15thDay
8%5%25%5%26%5%7%8%42%
2310
16th to endDay
5%435%5%46%6%7%10%38%
2402
August1st to 15thDay
7%425%5%35%5%6%9%42%
2145
16th to endDay
9%5%25%6%35%6%6%8%40%
2166
September1st to 15thDay
12%5%244345%5%6%45%
1887
16th to endDay
13%4244335%5%8%43%
1815
October1st to 15thDay
14%5%25%5%24445%42%
1785
16th to endDay
20%7%36%6%35%45%7%30%
1624
November1st to 15thDay
14%6%25%323446%45%
1582
16th to endDay
19%13%47%6%34345%26%
1620
December1st to 15thDay
17%16%6%9%6%4434421%
1575
16th to endDay
22%15%8%9%6%24335%17%
1536
January1st to 15thNight
20%13%5%9%6%23335%25%
2506
16th to endNight
15%14%5%10%6%35%336%24%
2625
February1st to 15thNight
16%13%5%8%6%24445%28%
2168
16th to endNight
16%11%5%7%7%4445%6%28%
1893
March1st to 15thNight
18%9%46%5%34445%32%
2118
16th to endNight
14%8%46%7%34446%35%
2100
April1st to 15thNight
18%7%35%4245%5%7%35%
1657
16th to endNight
16%7%35%42345%6%40%
1510
May1st to 15thNight
19%7%36%5%25%5%5%7%30%
1484
16th to endNight
13%42442345%8%45%
1508
June1st to 15thNight
10%435%42445%8%47%
1320
16th to endNight
7%425%5%26%6%6%7%44%
1320
July1st to 15thNight
7%425%42445%10%48%
1320
16th to endNight
6%324425%46%9%49%
1456
August1st to 15thNight
6%334435%35%9%49%
1485
16th to endNight
9%3244245%6%7%48%
1682
September1st to 15thNight
10%313424346%53%
1732
16th to endNight
13%423424446%51%
1815
October1st to 15thNight
12%5%2442335%7%48%
1845
16th to endNight
20%7%35%5%23446%36%
2247
November1st to 15thNight
14%7%345%2325%6%44%
2276
16th to endNight
21%11%46%5%24346%28%
2340
December1st to 15thNight
20%13%5%7%5%3445%5%23%
2382
16th to endNight
24%14%6%8%6%34345%18%
2688

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
66%412%11%5%
1433
16th to endDay
67%5%12%10%4
1599
February1st to 15thDay
65%49%13%6%
1686
16th to endDay
62%5%11%16%4
1580
March1st to 15thDay
61%5%10%15%6%
1842
16th to endDay
54%5%12%20%5%1
2133
April1st to 15thDay
52%5%10%20%11%
1976
16th to endDay
46%5%12%18%12%4
2120
May1st to 15thDay
55%7%11%18%7%
2136
16th to endDay
41%8%11%21%14%2
2255
June1st to 15thDay
42%7%11%22%14%1
2310
16th to endDay
40%9%13%18%16%2
2310
July1st to 15thDay
38%6%11%20%19%3
2161
16th to endDay
37%9%15%22%12%1
2240
August1st to 15thDay
35%7%15%23%16%2
2132
16th to endDay
38%8%13%18%16%4
2166
September1st to 15thDay
37%6%12%21%18%3
1887
16th to endDay
37%6%10%23%20%
1815
October1st to 15thDay
41%5%11%23%16%1
1785
16th to endDay
51%5%13%19%9%
1624
November1st to 15thDay
39%5%10%24%17%1
1582
16th to endDay
60%5%10%17%6%
1620
December1st to 15thDay
66%410%13%4
1575
16th to endDay
69%6%10%9%3
1536
January1st to 15thNight
62%310%14%8%
2506
16th to endNight
61%413%15%4
2625
February1st to 15thNight
58%6%12%13%7%
2177
16th to endNight
56%5%12%17%7%
1893
March1st to 15thNight
54%5%11%17%9%1
2118
16th to endNight
48%6%11%22%9%2
2100
April1st to 15thNight
47%6%11%18%15%
1657
16th to endNight
43%6%10%19%16%4
1510
May1st to 15thNight
51%8%12%17%9%
1485
16th to endNight
37%6%14%23%15%3
1510
June1st to 15thNight
35%5%11%26%18%1
1320
16th to endNight
35%9%15%21%14%3
1320
July1st to 15thNight
32%6%11%25%21%3
1240
16th to endNight
28%7%18%24%17%3
1355
August1st to 15thNight
31%5%13%25%20%2
1474
16th to endNight
31%8%12%22%20%4
1682
September1st to 15thNight
31%6%11%25%21%4
1732
16th to endNight
34%5%9%25%22%2
1815
October1st to 15thNight
34%6%10%25%21%
1845
16th to endNight
48%410%24%10%1
2247
November1st to 15thNight
41%311%22%18%2
2276
16th to endNight
57%411%19%7%
2340
December1st to 15thNight
61%6%11%13%7%
2382
16th to endNight
68%5%10%10%4
2688

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
25%17%36%12%6%1
90
16th to endDay
29%11%40%12%6%
96
February1st to 15thDay
18%26%37%15%1
90
16th to endDay
19%12%38%22%7%
81
March1st to 15thDay
34%12%23%23%5%
132
16th to endDay
25%10%32%21%7%2
288
April1st to 15thDay
24%10%29%22%13%
212
16th to endDay
20%5%30%16%18%8%
210
May1st to 15thDay
25%7%26%22%13%5%
228
16th to endDay
13%425%25%18%12%
295
June1st to 15thDay
13%5%28%32%15%5%
420
16th to endDay
16%5%26%24%21%6%
420
July1st to 15thDay
11%225%30%18%12%
400
16th to endDay
6%318%31%25%14%
388
August1st to 15thDay
12%17%27%31%19%
253
16th to endDay
12%114%20%32%19%
268
September1st to 15thDay
14%210%23%35%14%
255
16th to endDay
18%314%18%33%11%
254
October1st to 15thDay
14%7%21%28%18%9%
255
16th to endDay
22%13%27%29%5%
136
November1st to 15thDay
6%10%31%24%21%6%
90
16th to endDay
34%8%36%14%5%
90
December1st to 15thDay
21%17%40%15%5%
90
16th to endDay
29%22%39%7%1
96
January1st to 15thNight
27%13%34%19%4
900
16th to endNight
22%15%33%24%4
897
February1st to 15thNight
23%11%38%22%3
704
16th to endNight
21%11%35%25%4
631
March1st to 15thNight
24%9%30%27%8%
720
16th to endNight
18%8%34%28%8%
756
April1st to 15thNight
20%11%32%26%8%
497
16th to endNight
19%5%32%28%11%1
495
May1st to 15thNight
23%230%30%11%
495
16th to endNight
16%223%33%20%2
515
June1st to 15thNight
11%125%46%15%
495
16th to endNight
8%220%41%26%
495
July1st to 15thNight
9%117%41%28%1
465
16th to endNight
7%113%40%32%3
522
August1st to 15thNight
7%13%45%26%5%
494
16th to endNight
10%110%34%38%4
525
September1st to 15thNight
12%314%32%32%4
577
16th to endNight
15%314%33%29%3
657
October1st to 15thNight
16%5%23%30%21%2
660
16th to endNight
23%11%31%24%8%
704
November1st to 15thNight
18%10%31%25%13%1
700
16th to endNight
27%12%27%23%8%
720
December1st to 15thNight
27%13%32%21%5%
762
16th to endNight
30%11%34%19%4
960
Page generated at 2017-04-02 07:39:04. Version ac04

Copyright 2017 A. Danko


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