Logansport
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Logansport clear sky chart from 2005-11-05 to

2017-09-12
.

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
38%
15853
17%
46756
11%
15811
44%
15811
22%
31815

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
17%
900
13%
2506
5%
895
25%
895
14%
1936
January16th to endNight
20%
951
11%
2679
4%
951
25%
951
15%
2043
February1st to 15thNight
22%
701
10%
2121
4%
701
29%
701
16%
1553
February16th to endNight
22%
631
15%
1893
6%
631
30%
631
16%
1377
March1st to 15thNight
25%
720
13%
2154
8%
720
30%
720
16%
1578
March16th to endNight
29%
702
15%
2046
8%
702
36%
702
20%
1438
April1st to 15thNight
30%
539
15%
1797
9%
539
39%
539
20%
1201
April16th to endNight
36%
540
21%
1692
12%
540
45%
540
24%
1105
May1st to 15thNight
37%
540
15%
1620
9%
540
43%
540
21%
1146
May16th to endNight
50%
562
16%
1595
11%
561
54%
561
27%
1073
June1st to 15thNight
58%
540
16%
1440
11%
540
63%
540
38%
881
June16th to endNight
56%
540
17%
1440
12%
540
61%
540
34%
931
July1st to 15thNight
63%
510
17%
1360
14%
510
65%
510
37%
835
July16th to endNight
70%
564
22%
1428
17%
531
73%
531
41%
843
August1st to 15thNight
72%
539
22%
1609
19%
536
75%
536
38%
923
August16th to endNight
67%
573
20%
1902
20%
573
71%
573
33%
1072
September1st to 15thNight
63%
584
26%
1821
23%
584
67%
584
35%
1038
September16th to endNight
63%
657
26%
1815
20%
657
67%
657
35%
1089
October1st to 15thNight
51%
660
28%
1818
21%
660
57%
660
33%
1120
October16th to endNight
29%
704
17%
2280
12%
704
37%
704
20%
1514
November1st to 15thNight
37%
700
24%
2276
18%
700
47%
700
26%
1374
November16th to endNight
27%
720
16%
2340
11%
720
34%
720
16%
1666
December1st to 15thNight
21%
816
10%
2436
4%
816
26%
816
13%
1887
December16th to endNight
16%
960
9%
2688
3%
960
22%
960
11%
2192

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%3445%7%35%
47907
Night
15%8%35%5%24446%38%
46927
Cloud CoverDay
14%8%36%5%35%45%7%35%
47916
Night
15%8%35%5%24446%38%
46932
TransparencyDay
47%6%12%20%12%1
47596
Night
46%5%11%20%13%2
46756
SeeingDay
16%5%24%25%19%7%
5865
Night
19%8%27%29%13%1
15857

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%46%7%4435%422%
1432
16th to endDay
15%18%6%9%6%24246%23%
1543
February1st to 15thDay
15%14%5%9%5%35%35%5%25%
1738
16th to endDay
16%13%6%8%6%34336%26%
1580
March1st to 15thDay
20%12%5%7%6%24336%26%
1796
16th to endDay
19%10%37%5%2345%6%30%
2187
April1st to 15thDay
20%9%35%423446%35%
2151
16th to endDay
19%7%25%5%24447%35%
2268
May1st to 15thDay
20%8%35%5%3445%7%29%
2331
16th to endDay
14%5%25%5%35%46%7%38%
2518
June1st to 15thDay
11%425%4336%6%9%42%
2520
16th to endDay
9%5%25%6%36%6%6%9%39%
2520
July1st to 15thDay
9%425%5%35%5%6%9%42%
2520
16th to endDay
7%424436%5%7%10%42%
2643
August1st to 15thDay
6%425%5%36%5%6%9%44%
2340
16th to endDay
9%325%445%6%6%8%43%
2297
September1st to 15thDay
11%425%5%35%46%6%45%
2047
16th to endDay
11%4245%35%45%7%45%
1815
October1st to 15thDay
14%6%245%24446%43%
1810
16th to endDay
19%6%25%5%25%446%35%
1591
November1st to 15thDay
14%7%24414345%47%
1582
16th to endDay
20%11%45%5%3435%6%30%
1620
December1st to 15thDay
19%13%5%9%7%23346%24%
1522
16th to endDay
24%17%5%7%5%34335%19%
1536
January1st to 15thNight
21%13%5%7%6%3333428%
2506
16th to endNight
15%14%6%9%6%2434427%
2679
February1st to 15thNight
17%12%6%6%5%23345%31%
2119
16th to endNight
15%12%48%6%24345%32%
1893
March1st to 15thNight
18%11%46%5%3445%432%
2141
16th to endNight
16%7%46%5%24447%34%
2046
April1st to 15thNight
17%6%36%425%446%37%
1797
16th to endNight
19%6%2431436%7%39%
1692
May1st to 15thNight
21%5%26%5%25%446%35%
1620
16th to endNight
12%424425%5%6%7%41%
1593
June1st to 15thNight
9%42332446%8%50%
1440
16th to endNight
9%415%4345%6%8%46%
1440
July1st to 15thNight
7%4234345%5%9%49%
1440
16th to endNight
6%32433446%8%52%
1525
August1st to 15thNight
5%3243345%6%8%50%
1620
16th to endNight
7%3144345%6%7%50%
1902
September1st to 15thNight
9%423414347%53%
1821
16th to endNight
10%41442445%8%50%
1815
October1st to 15thNight
11%424423436%50%
1818
16th to endNight
20%6%245%24345%39%
2280
November1st to 15thNight
12%8%34323347%46%
2276
16th to endNight
19%9%5%5%5%24346%32%
2340
December1st to 15thNight
21%12%6%8%5%24335%26%
2436
16th to endNight
25%15%47%6%24345%20%
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
18%17%46%6%4435%422%
1432
16th to endDay
15%18%6%9%5%24346%23%
1543
February1st to 15thDay
16%14%5%10%5%35%345%25%
1738
16th to endDay
15%13%6%8%6%33436%26%
1580
March1st to 15thDay
20%12%5%8%6%24346%26%
1806
16th to endDay
18%9%47%6%2445%6%30%
2186
April1st to 15thDay
20%9%35%423346%35%
2151
16th to endDay
18%8%25%5%24447%34%
2268
May1st to 15thDay
20%8%36%5%35%45%7%29%
2331
16th to endDay
13%6%25%5%35%5%6%7%38%
2518
June1st to 15thDay
11%425%5%345%6%9%42%
2520
16th to endDay
9%5%25%6%36%6%5%9%39%
2520
July1st to 15thDay
9%4245%35%5%6%9%41%
2520
16th to endDay
6%425%436%5%7%10%41%
2643
August1st to 15thDay
6%425%5%35%5%6%9%44%
2340
16th to endDay
9%324445%6%6%9%42%
2297
September1st to 15thDay
11%425%5%25%46%6%45%
2047
16th to endDay
11%4245%35%447%45%
1815
October1st to 15thDay
14%5%25%5%24446%43%
1810
16th to endDay
19%7%25%435%5%46%35%
1591
November1st to 15thDay
14%7%24424345%46%
1582
16th to endDay
20%10%46%5%2435%6%30%
1620
December1st to 15thDay
19%13%6%8%6%24336%24%
1522
16th to endDay
23%17%5%7%5%34335%19%
1536
January1st to 15thNight
20%13%47%7%33335%27%
2506
16th to endNight
15%14%7%9%6%3444427%
2679
February1st to 15thNight
16%12%6%7%5%23345%31%
2112
16th to endNight
15%12%48%5%24245%31%
1893
March1st to 15thNight
18%11%46%5%3445%431%
2154
16th to endNight
16%7%46%5%245%47%34%
2046
April1st to 15thNight
17%6%36%425%446%37%
1797
16th to endNight
18%6%2442436%8%39%
1692
May1st to 15thNight
20%5%36%425%35%6%35%
1619
16th to endNight
12%5%24426%5%6%8%41%
1593
June1st to 15thNight
8%42332446%8%50%
1440
16th to endNight
8%415%4245%5%9%45%
1440
July1st to 15thNight
7%4234345%6%9%48%
1440
16th to endNight
5%324435%46%8%52%
1525
August1st to 15thNight
5%3143345%7%8%51%
1620
16th to endNight
7%4244335%5%7%50%
1902
September1st to 15thNight
9%423413447%53%
1821
16th to endNight
10%413424448%50%
1815
October1st to 15thNight
11%425%423436%51%
1818
16th to endNight
20%6%245%24345%38%
2280
November1st to 15thNight
12%8%2432345%6%46%
2276
16th to endNight
19%9%46%6%34346%31%
2340
December1st to 15thNight
21%13%6%7%5%2333426%
2436
16th to endNight
24%15%5%7%6%24335%20%
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
63%411%13%6%
1433
16th to endDay
62%413%12%6%
1543
February1st to 15thDay
61%411%14%7%1
1740
16th to endDay
58%5%12%18%4
1580
March1st to 15thDay
60%412%15%6%
1806
16th to endDay
53%5%14%20%5%1
2187
April1st to 15thDay
49%5%11%21%12%
2151
16th to endDay
48%5%12%18%10%4
2268
May1st to 15thDay
53%7%11%18%8%
2331
16th to endDay
43%7%11%21%13%2
2522
June1st to 15thDay
36%8%11%24%17%1
2520
16th to endDay
39%8%14%19%15%2
2520
July1st to 15thDay
38%7%11%21%17%3
2371
16th to endDay
35%8%16%23%13%2
2477
August1st to 15thDay
33%7%14%25%17%1
2327
16th to endDay
35%9%12%20%16%5%
2297
September1st to 15thDay
37%6%13%21%17%4
2047
16th to endDay
37%49%25%20%1
1815
October1st to 15thDay
41%5%10%23%16%1
1810
16th to endDay
48%6%11%22%10%
1591
November1st to 15thDay
39%410%23%17%3
1582
16th to endDay
54%412%21%6%
1620
December1st to 15thDay
61%5%11%17%3
1522
16th to endDay
68%410%11%3
1536
January1st to 15thNight
60%39%16%9%
2506
16th to endNight
59%314%15%6%
2679
February1st to 15thNight
55%414%16%8%1
2121
16th to endNight
55%411%19%8%
1893
March1st to 15thNight
54%5%11%17%8%2
2154
16th to endNight
49%6%13%21%8%1
2046
April1st to 15thNight
46%5%11%20%14%1
1797
16th to endNight
42%5%9%21%14%5%
1692
May1st to 15thNight
49%6%11%21%10%1
1620
16th to endNight
39%9%11%20%15%3
1595
June1st to 15thNight
31%6%13%25%21%1
1440
16th to endNight
34%8%14%23%16%3
1440
July1st to 15thNight
31%6%15%22%19%4
1360
16th to endNight
27%7%15%27%18%4
1428
August1st to 15thNight
27%7%15%22%24%2
1609
16th to endNight
30%7%12%22%21%5%
1902
September1st to 15thNight
30%5%11%26%20%5%
1821
16th to endNight
32%5%10%23%25%2
1815
October1st to 15thNight
34%5%9%26%22%1
1818
16th to endNight
46%5%10%25%11%1
2280
November1st to 15thNight
38%48%22%20%4
2276
16th to endNight
54%410%22%8%
2340
December1st to 15thNight
61%410%14%7%
2436
16th to endNight
67%49%13%5%
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
24%18%36%12%5%2
90
16th to endDay
33%13%32%17%3
96
February1st to 15thDay
21%15%48%11%3
90
16th to endDay
27%7%35%18%11%
81
March1st to 15thDay
33%14%31%17%3
96
16th to endDay
26%8%30%22%11%1
288
April1st to 15thDay
24%9%31%23%8%1
270
16th to endDay
22%7%26%25%12%6%
270
May1st to 15thDay
25%10%25%21%12%4
288
16th to endDay
16%428%24%17%7%
418
June1st to 15thDay
12%424%33%20%5%
495
16th to endDay
11%5%30%28%16%7%
495
July1st to 15thDay
11%224%28%21%10%
475
16th to endDay
9%15%31%27%15%
503
August1st to 15thDay
9%11%26%29%21%
313
16th to endDay
10%215%22%34%14%
332
September1st to 15thDay
11%216%28%30%10%
299
16th to endDay
14%311%23%37%9%
254
October1st to 15thDay
12%426%28%21%6%
250
16th to endDay
23%11%34%30%
96
November1st to 15thDay
11%7%23%26%22%8%
90
16th to endDay
31%13%34%14%6%
90
December1st to 15thDay
27%13%35%14%8%
90
16th to endDay
32%16%40%7%3
96
January1st to 15thNight
26%14%34%20%3
900
16th to endNight
21%14%34%26%3
951
February1st to 15thNight
24%10%34%27%2
704
16th to endNight
21%12%36%24%5%
631
March1st to 15thNight
22%12%32%27%5%
720
16th to endNight
19%9%35%26%6%1
702
April1st to 15thNight
19%11%35%26%7%
539
16th to endNight
22%7%30%27%10%1
540
May1st to 15thNight
24%426%33%10%
540
16th to endNight
16%322%38%17%1
563
June1st to 15thNight
10%222%46%17%
540
16th to endNight
10%123%40%22%
540
July1st to 15thNight
10%18%41%26%2
510
16th to endNight
6%113%37%35%4
564
August1st to 15thNight
6%12%43%31%5%
539
16th to endNight
9%113%33%36%5%
573
September1st to 15thNight
13%316%35%26%5%
584
16th to endNight
11%414%34%31%2
657
October1st to 15thNight
14%6%22%34%18%3
660
16th to endNight
24%11%31%23%10%
704
November1st to 15thNight
18%10%30%27%12%1
700
16th to endNight
24%13%30%23%8%
720
December1st to 15thNight
28%11%31%21%6%
816
16th to endNight
32%11%32%20%3
960
Page generated at 2017-09-13 07:39:09. Version ac04

Copyright 2017 A. Danko


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