Batesville
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Batesville clear sky chart from 2005-11-05 to 2018-01-12.

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
47%
16004
23%
48368
15%
15961
56%
15961
27%
29972

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
28%
765
23%
2472
10%
761
44%
761
20%
1518
January16th to endNight
26%
768
25%
2496
10%
768
44%
768
21%
1533
February1st to 15thNight
30%
702
27%
2109
11%
699
46%
699
26%
1238
February16th to endNight
27%
631
24%
1893
10%
631
40%
631
22%
1203
March1st to 15thNight
33%
720
24%
2045
12%
720
44%
720
25%
1312
March16th to endNight
36%
768
20%
2112
11%
768
44%
768
28%
1341
April1st to 15thNight
40%
665
25%
1923
15%
665
51%
665
32%
1131
April16th to endNight
49%
540
24%
1666
16%
540
57%
540
29%
994
May1st to 15thNight
49%
540
18%
1620
10%
540
56%
540
28%
1014
May16th to endNight
61%
561
18%
1683
13%
561
64%
561
30%
1047
June1st to 15thNight
63%
540
14%
1620
12%
540
65%
540
28%
1044
June16th to endNight
74%
540
16%
1620
13%
540
76%
540
33%
975
July1st to 15thNight
69%
510
11%
1530
10%
510
70%
510
25%
1024
July16th to endNight
72%
564
15%
1595
12%
531
74%
531
29%
1038
August1st to 15thNight
65%
539
16%
1609
14%
536
66%
536
25%
1086
August16th to endNight
66%
574
19%
1882
20%
574
66%
574
24%
1236
September1st to 15thNight
60%
720
17%
1980
15%
720
61%
720
27%
1324
September16th to endNight
60%
717
25%
1980
20%
717
64%
717
30%
1256
October1st to 15thNight
51%
720
31%
2016
24%
720
59%
720
35%
1203
October16th to endNight
51%
768
36%
2304
26%
768
65%
768
37%
1259
November1st to 15thNight
51%
760
29%
2439
24%
760
61%
760
33%
1351
November16th to endNight
42%
780
28%
2535
19%
780
55%
780
27%
1477
December1st to 15thNight
36%
780
24%
2535
14%
780
49%
780
22%
1575
December16th to endNight
29%
832
22%
2704
11%
832
43%
832
18%
1793

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%5%25%5%35%5%5%7%39%
48958
Night
14%5%2442445%7%44%
48569
TransparencyDay
41%5%11%19%17%4
48659
Night
37%5%11%20%19%5%
48372
SeeingDay
17%7%18%22%20%13%
5806
Night
17%8%19%28%21%4
16008

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
19%5%245%23335%44%
1710
16th to endDay
16%5%13323445%47%
1728
February1st to 15thDay
16%6%2432445%6%44%
1747
16th to endDay
17%425%324436%44%
1580
March1st to 15thDay
18%5%23324346%43%
1914
16th to endDay
17%5%245%25%446%40%
2111
April1st to 15thDay
13%425%425%5%6%8%41%
2034
16th to endDay
14%4245%2445%5%45%
2292
May1st to 15thDay
13%6%26%435%5%5%7%40%
2331
16th to endDay
11%416%7%46%6%5%8%35%
2431
June1st to 15thDay
10%5%26%7%5%8%6%7%10%30%
2340
16th to endDay
5%325%7%47%7%8%10%36%
2340
July1st to 15thDay
10%5%37%8%5%9%7%8%9%23%
2340
16th to endDay
7%427%8%6%8%8%8%10%26%
2465
August1st to 15thDay
11%5%26%5%5%8%8%7%10%28%
2340
16th to endDay
13%6%36%7%46%7%7%8%26%
2304
September1st to 15thDay
14%5%26%6%46%7%6%7%32%
1980
16th to endDay
16%5%25%5%2435%7%40%
1980
October1st to 15thDay
16%412312246%53%
1942
16th to endDay
13%41331322459%
1920
November1st to 15thDay
14%313223335%55%
1747
16th to endDay
17%413323345%49%
1755
December1st to 15thDay
19%6%2441445%441%
1755
16th to endDay
26%7%13413345%38%
1872
January1st to 15thNight
19%424423345%46%
2472
16th to endNight
16%5%25%423345%45%
2496
February1st to 15thNight
14%314423445%50%
2103
16th to endNight
15%5%25%5%2445%6%43%
1893
March1st to 15thNight
16%5%14324445%45%
2045
16th to endNight
14%7%135%23446%46%
2112
April1st to 15thNight
14%313323447%50%
1923
16th to endNight
11%415%42445%6%48%
1666
May1st to 15thNight
12%4244335%6%8%43%
1619
16th to endNight
9%5%25%435%5%6%7%45%
1682
June1st to 15thNight
9%5%25%6%35%6%9%10%38%
1620
16th to endNight
5%313445%6%7%12%44%
1620
July1st to 15thNight
9%425%6%47%6%8%12%33%
1620
16th to endNight
6%4246%26%7%9%13%34%
1703
August1st to 15thNight
13%5%25%5%36%5%7%11%34%
1620
16th to endNight
12%5%26%5%35%5%8%10%34%
1882
September1st to 15thNight
12%6%25%435%6%5%8%37%
1980
16th to endNight
14%5%1442445%7%44%
1980
October1st to 15thNight
14%413413335%53%
2016
16th to endNight
11%31341224458%
2304
November1st to 15thNight
14%423313235%55%
2439
16th to endNight
16%413333345%50%
2535
December1st to 15thNight
18%5%25%413345%44%
2535
16th to endNight
22%7%144235%5%6%36%
2704

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
44%37%15%23%6%
1711
16th to endDay
38%36%21%21%8%
1728
February1st to 15thDay
38%38%20%24%4
1749
16th to endDay
40%38%21%18%6%
1580
March1st to 15thDay
41%37%19%20%6%
1914
16th to endDay
43%411%20%16%3
2112
April1st to 15thDay
37%5%10%21%19%5%
2034
16th to endDay
37%49%21%20%5%
2292
May1st to 15thDay
41%412%19%18%2
2331
16th to endDay
42%7%14%19%13%2
2435
June1st to 15thDay
44%8%19%20%5%1
2340
16th to endDay
37%9%16%19%14%2
2340
July1st to 15thDay
49%9%17%16%6%1
2201
16th to endDay
43%10%18%17%7%1
2310
August1st to 15thDay
44%9%15%20%8%1
2327
16th to endDay
50%8%14%17%8%
2304
September1st to 15thDay
45%6%13%17%14%3
1980
16th to endDay
41%411%18%19%4
1980
October1st to 15thDay
32%310%18%27%7%
1942
16th to endDay
29%15%19%30%13%
1920
November1st to 15thDay
32%37%16%30%10%
1747
16th to endDay
36%25%17%28%8%
1755
December1st to 15thDay
43%37%18%19%7%
1755
16th to endDay
48%28%17%15%6%
1872
January1st to 15thNight
40%37%15%25%6%
2472
16th to endNight
41%25%18%23%7%
2496
February1st to 15thNight
35%27%21%25%7%
2112
16th to endNight
40%47%21%22%4
1893
March1st to 15thNight
38%5%8%19%19%7%
2045
16th to endNight
38%311%23%18%3
2112
April1st to 15thNight
32%310%25%22%5%
1923
16th to endNight
35%49%23%20%6%
1666
May1st to 15thNight
37%5%15%21%17%1
1620
16th to endNight
35%6%16%25%11%2
1684
June1st to 15thNight
36%9%21%22%8%1
1620
16th to endNight
29%10%20%22%14%2
1620
July1st to 15thNight
40%9%22%19%7%1
1530
16th to endNight
34%10%22%20%8%1
1595
August1st to 15thNight
40%9%17%21%10%1
1609
16th to endNight
40%8%18%20%9%1
1882
September1st to 15thNight
41%7%14%19%14%3
1980
16th to endNight
37%6%12%22%17%4
1980
October1st to 15thNight
33%310%19%26%6%
2016
16th to endNight
29%2421%29%12%
2304
November1st to 15thNight
32%26%18%28%11%
2439
16th to endNight
35%45%20%25%9%
2535
December1st to 15thNight
41%38%18%19%8%
2535
16th to endNight
47%39%16%17%5%
2704

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
26%17%31%17%5%
123
16th to endDay
20%33%31%12%2
96
February1st to 15thDay
18%25%43%12%
90
16th to endDay
29%16%40%11%2
81
March1st to 15thDay
23%13%27%25%8%
204
16th to endDay
20%14%25%25%12%1
288
April1st to 15thDay
17%10%23%27%17%4
270
16th to endDay
15%8%20%28%20%8%
270
May1st to 15thDay
16%9%26%17%14%15%
288
16th to endDay
17%5%16%20%22%17%
331
June1st to 15thDay
15%37%24%27%21%
315
16th to endDay
9%116%24%23%24%
315
July1st to 15thDay
10%112%20%25%29%
305
16th to endDay
6%16%17%32%34%
326
August1st to 15thDay
20%7%20%23%26%
313
16th to endDay
18%17%20%28%23%
332
September1st to 15thDay
16%411%18%30%18%
315
16th to endDay
18%19%25%30%13%
314
October1st to 15thDay
21%316%31%20%6%
315
16th to endDay
15%7%18%29%23%5%
336
November1st to 15thDay
24%10%20%25%15%3
165
16th to endDay
18%6%31%26%14%2
135
December1st to 15thDay
27%17%28%20%5%
135
16th to endDay
39%10%34%13%1
144
January1st to 15thNight
23%15%24%26%8%
765
16th to endNight
21%17%28%29%3
768
February1st to 15thNight
18%16%29%31%4
704
16th to endNight
19%18%29%27%4
631
March1st to 15thNight
20%15%28%30%5%
720
16th to endNight
19%11%25%30%12%
768
April1st to 15thNight
18%12%25%27%14%1
665
16th to endNight
13%7%21%34%19%2
540
May1st to 15thNight
16%5%20%31%22%3
540
16th to endNight
13%115%27%33%8%
563
June1st to 15thNight
11%110%29%37%10%
540
16th to endNight
6%110%27%39%13%
540
July1st to 15thNight
11%17%20%47%11%
510
16th to endNight
8%16%24%41%18%
564
August1st to 15thNight
17%15%20%41%13%
539
16th to endNight
14%1425%41%12%
574
September1st to 15thNight
15%110%25%35%11%
720
16th to endNight
18%211%32%30%4
717
October1st to 15thNight
16%6%18%27%24%6%
720
16th to endNight
13%8%19%31%22%4
768
November1st to 15thNight
16%7%19%31%20%3
760
16th to endNight
18%11%22%30%15%1
780
December1st to 15thNight
21%13%22%32%10%1
780
16th to endNight
27%11%26%27%6%
832
Page generated at 2018-01-12 22:01:37. Version ac04

Copyright 2018 A. Danko


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