Mankota
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Mankota clear sky chart from 2005-11-05 to 2017-12-01.

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
36%
16025
15%
47661
9%
15985
43%
15985
24%
31335

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
23%
895
12%
2685
5%
895
30%
895
17%
1920
January16th to endNight
23%
960
15%
2721
5%
960
33%
960
18%
1949
February1st to 15thNight
31%
714
11%
2303
6%
711
37%
711
18%
1595
February16th to endNight
32%
632
13%
2022
9%
632
38%
632
17%
1466
March1st to 15thNight
33%
720
14%
2088
7%
720
40%
720
24%
1408
March16th to endNight
30%
710
13%
2054
7%
710
37%
710
18%
1523
April1st to 15thNight
34%
539
16%
1798
10%
539
43%
539
22%
1153
April16th to endNight
36%
540
16%
1581
10%
540
42%
540
23%
1087
May1st to 15thNight
41%
539
15%
1440
7%
539
46%
539
32%
925
May16th to endNight
38%
560
9%
1495
5%
558
40%
558
23%
1078
June1st to 15thNight
46%
360
6%
1260
5%
360
49%
360
25%
748
June16th to endNight
53%
360
7%
1260
7%
360
56%
360
33%
680
July1st to 15thNight
59%
340
9%
1190
9%
340
62%
340
38%
607
July16th to endNight
61%
499
18%
1352
12%
467
66%
467
50%
688
August1st to 15thNight
64%
539
19%
1467
13%
536
68%
536
47%
811
August16th to endNight
62%
573
28%
1776
21%
573
68%
573
45%
916
September1st to 15thNight
57%
540
20%
1800
19%
540
63%
540
34%
992
September16th to endNight
51%
625
27%
1967
21%
625
60%
625
38%
1092
October1st to 15thNight
36%
720
21%
2160
11%
720
46%
720
30%
1305
October16th to endNight
33%
870
21%
2406
9%
870
41%
870
26%
1592
November1st to 15thNight
28%
950
17%
2657
7%
950
35%
950
22%
1829
November16th to endNight
23%
975
16%
2730
5%
975
32%
975
22%
1865
December1st to 15thNight
24%
905
9%
2569
4%
905
30%
905
14%
2016
December16th to endNight
24%
960
13%
2880
4%
960
33%
960
16%
2090

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
10%7%36%5%35%45%7%38%
48788
Night
8%8%36%5%35%5%5%7%39%
47818
Cloud CoverDay
10%7%36%5%35%45%7%38%
48789
Night
8%8%36%6%35%5%5%7%39%
47820
TransparencyDay
43%5%16%23%9%1
48449
Night
43%5%15%23%11%1
47661
SeeingDay
13%9%28%29%15%3
6374
Night
12%8%33%32%11%1
16036

By Month

Percentage Cloud Cover NW (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
6%11%6%9%7%5%6%5%5%6%27%
1253
16th to endDay
49%48%8%48%7%8%8%26%
1501
February1st to 15thDay
8%11%6%12%9%45%345%27%
1569
16th to endDay
5%13%7%11%8%46%6%6%7%22%
1452
March1st to 15thDay
6%10%49%6%47%6%7%8%28%
1869
16th to endDay
9%12%6%9%7%35%5%5%9%25%
2168
April1st to 15thDay
11%9%46%7%445%6%7%32%
2150
16th to endDay
14%10%37%4345%5%7%33%
2376
May1st to 15thDay
14%8%35%5%25%46%6%37%
2511
16th to endDay
22%6%35%5%25%45%7%30%
2616
June1st to 15thDay
17%5%35%5%35%5%6%7%32%
2700
16th to endDay
10%424435%5%7%8%43%
2700
July1st to 15thDay
5%3144245%6%9%49%
2700
16th to endDay
431232345%8%59%
2719
August1st to 15thDay
8%42442445%8%49%
2484
16th to endDay
7%313323348%57%
2426
September1st to 15thDay
11%6%14423346%49%
2160
16th to endDay
13%41432345%8%49%
1992
October1st to 15thDay
13%7%35%42345%6%43%
1800
16th to endDay
9%8%36%42445%8%42%
1806
November1st to 15thDay
8%10%35%6%3345%7%40%
1528
16th to endDay
6%9%38%7%35%45%8%35%
1560
December1st to 15thDay
7%13%5%10%8%5%8%5%47%21%
1404
16th to endDay
5%11%413%9%5%6%45%8%24%
1344
January1st to 15thNight
6%10%49%5%47%5%5%8%31%
2685
16th to endNight
410%49%8%5%6%5%6%8%31%
2721
February1st to 15thNight
5%10%5%9%7%45%6%5%7%32%
2292
16th to endNight
6%12%6%10%8%3436%7%28%
2022
March1st to 15thNight
6%8%46%7%45%5%6%10%34%
2088
16th to endNight
9%10%5%10%7%45%5%48%27%
2051
April1st to 15thNight
9%8%35%6%35%5%6%7%39%
1798
16th to endNight
12%10%36%435%5%5%6%35%
1581
May1st to 15thNight
11%7%24424448%43%
1439
16th to endNight
16%7%26%7%3435%7%33%
1495
June1st to 15thNight
13%4244345%6%9%42%
1260
16th to endNight
6%314435%5%48%51%
1260
July1st to 15thNight
6%32332345%9%54%
1260
16th to endNight
331322436%8%59%
1446
August1st to 15thNight
6%412333347%58%
1475
16th to endNight
8%312322336%61%
1776
September1st to 15thNight
10%414433347%52%
1800
16th to endNight
10%42332345%7%54%
1967
October1st to 15thNight
11%7%25%42345%7%46%
2160
16th to endNight
8%9%36%4245%6%8%38%
2406
November1st to 15thNight
8%10%46%6%45%5%45%39%
2657
16th to endNight
6%10%47%6%45%5%5%7%36%
2730
December1st to 15thNight
7%12%6%11%8%6%6%5%5%7%22%
2569
16th to endNight
7%11%48%7%46%7%6%7%27%
2880

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%11%6%9%7%6%7%5%46%28%
1253
16th to endDay
49%5%8%8%48%6%8%8%26%
1501
February1st to 15thDay
8%11%7%11%10%45%345%27%
1569
16th to endDay
5%13%7%11%8%45%5%6%7%23%
1452
March1st to 15thDay
6%10%5%8%7%47%5%6%7%29%
1869
16th to endDay
9%12%5%10%6%35%5%5%9%25%
2169
April1st to 15thDay
11%9%37%6%445%6%7%32%
2150
16th to endDay
14%11%35%5%3445%7%33%
2376
May1st to 15thDay
14%8%35%6%2445%7%37%
2511
16th to endDay
22%6%25%5%25%45%7%31%
2616
June1st to 15thDay
17%6%25%5%36%46%8%32%
2700
16th to endDay
10%424425%5%6%9%43%
2700
July1st to 15thDay
6%325%43447%9%49%
2700
16th to endDay
432232345%8%59%
2719
August1st to 15thDay
9%3144345%5%8%49%
2484
16th to endDay
7%323323348%57%
2426
September1st to 15thDay
12%6%24423346%49%
2160
16th to endDay
13%41431335%7%49%
1992
October1st to 15thDay
14%7%35%323446%43%
1800
16th to endDay
9%8%36%42445%8%42%
1806
November1st to 15thDay
9%9%36%6%33448%39%
1528
16th to endDay
6%9%39%6%36%46%7%35%
1560
December1st to 15thDay
7%13%6%10%8%5%8%5%5%7%22%
1404
16th to endDay
6%11%5%12%10%5%6%45%8%24%
1344
January1st to 15thNight
6%10%5%8%6%46%5%5%7%32%
2685
16th to endNight
49%49%8%46%5%6%8%31%
2721
February1st to 15thNight
6%11%5%9%6%45%6%5%7%32%
2292
16th to endNight
7%12%6%11%7%35%46%5%29%
2022
March1st to 15thNight
6%8%5%6%7%36%46%10%34%
2088
16th to endNight
9%10%5%10%7%45%5%5%7%28%
2054
April1st to 15thNight
9%7%36%5%25%5%6%7%38%
1798
16th to endNight
12%10%36%5%26%5%5%6%35%
1581
May1st to 15thNight
11%7%2443445%7%43%
1439
16th to endNight
17%6%26%7%3445%7%33%
1494
June1st to 15thNight
13%5%244345%6%8%42%
1260
16th to endNight
7%213427%449%51%
1260
July1st to 15thNight
6%31332436%9%54%
1260
16th to endNight
332232445%9%58%
1446
August1st to 15thNight
6%31433335%7%57%
1475
16th to endNight
7%322312346%61%
1776
September1st to 15thNight
10%414424447%52%
1800
16th to endNight
10%41332245%6%54%
1967
October1st to 15thNight
11%6%3443335%7%46%
2160
16th to endNight
8%9%36%4345%6%8%38%
2406
November1st to 15thNight
8%10%46%6%35%446%39%
2657
16th to endNight
7%10%47%6%35%5%5%6%36%
2730
December1st to 15thNight
7%12%6%11%8%5%6%5%5%6%22%
2569
16th to endNight
7%12%48%8%46%7%5%8%28%
2880

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
56%5%12%18%6%
1253
16th to endDay
50%7%19%15%5%
1501
February1st to 15thDay
59%413%15%7%
1569
16th to endDay
58%416%12%7%
1452
March1st to 15thDay
51%7%21%15%3
1869
16th to endDay
54%7%18%16%3
2169
April1st to 15thDay
48%6%16%20%7%
2150
16th to endDay
49%417%21%6%1
2376
May1st to 15thDay
45%412%28%9%
2511
16th to endDay
51%5%15%19%7%
2620
June1st to 15thDay
47%5%17%20%8%
2700
16th to endDay
36%5%18%30%8%
2700
July1st to 15thDay
29%419%30%14%2
2541
16th to endDay
23%414%32%21%4
2550
August1st to 15thDay
31%417%28%14%2
2468
16th to endDay
25%313%35%18%3
2426
September1st to 15thDay
36%213%28%15%3
2160
16th to endDay
32%412%31%15%1
1992
October1st to 15thDay
40%417%27%9%
1800
16th to endDay
39%5%19%28%7%
1806
November1st to 15thDay
43%417%25%8%1
1528
16th to endDay
46%7%19%19%6%
1560
December1st to 15thDay
60%6%14%16%1
1404
16th to endDay
57%5%19%12%4
1344
January1st to 15thNight
49%7%17%19%5%
2685
16th to endNight
49%6%17%19%5%1
2721
February1st to 15thNight
50%5%18%18%6%1
2303
16th to endNight
54%414%17%8%
2022
March1st to 15thNight
43%5%20%21%7%
2088
16th to endNight
54%5%14%19%5%
2054
April1st to 15thNight
42%6%14%25%10%1
1798
16th to endNight
48%313%21%11%1
1581
May1st to 15thNight
38%411%30%14%
1440
16th to endNight
49%5%13%19%11%
1495
June1st to 15thNight
37%5%17%24%13%1
1260
16th to endNight
29%5%21%31%10%
1260
July1st to 15thNight
26%415%31%18%3
1190
16th to endNight
20%416%32%21%5%
1352
August1st to 15thNight
26%215%35%16%2
1467
16th to endNight
24%310%28%27%5%
1776
September1st to 15thNight
32%310%28%19%6%
1800
16th to endNight
28%411%30%21%2
1967
October1st to 15thNight
36%415%26%16%
2160
16th to endNight
41%5%15%25%10%1
2406
November1st to 15thNight
46%5%14%22%9%1
2657
16th to endNight
45%5%21%19%7%
2730
December1st to 15thNight
60%5%14%15%3
2569
16th to endNight
51%7%17%17%6%
2880

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
6%6%21%38%20%6%
60
16th to endDay
13%14%27%24%19%1
91
February1st to 15thDay
17%8%43%26%3
90
16th to endDay
14%7%44%22%8%2
81
March1st to 15thDay
14%13%42%20%8%
159
16th to endDay
13%14%40%21%7%1
288
April1st to 15thDay
15%17%32%25%7%
269
16th to endDay
22%11%27%27%10%
333
May1st to 15thDay
16%8%28%26%15%3
468
16th to endDay
22%8%20%26%14%7%
517
June1st to 15thDay
16%9%29%26%15%2
495
16th to endDay
10%10%25%31%17%3
495
July1st to 15thDay
9%220%41%20%5%
475
16th to endDay
5%427%35%23%3
515
August1st to 15thDay
10%322%33%22%7%
457
16th to endDay
9%7%20%34%22%6%
332
September1st to 15thDay
13%9%25%36%11%3
315
16th to endDay
17%9%21%29%16%4
237
October1st to 15thDay
27%6%29%21%10%4
135
16th to endDay
15%14%33%21%13%2
144
November1st to 15thDay
11%10%40%25%10%1
135
16th to endDay
8%19%37%22%11%1
135
December1st to 15thDay
10%7%40%25%10%5%
84
16th to endDay
12%12%46%21%41
64
January1st to 15thNight
12%13%41%24%7%1
900
16th to endNight
10%15%40%24%7%1
960
February1st to 15thNight
9%9%36%29%11%2
719
16th to endNight
12%6%32%30%15%2
632
March1st to 15thNight
9%8%38%31%9%2
720
16th to endNight
14%9%34%31%8%1
710
April1st to 15thNight
12%9%35%33%8%
539
16th to endNight
18%8%29%34%8%
540
May1st to 15thNight
15%6%30%34%12%1
540
16th to endNight
19%8%23%30%16%1
560
June1st to 15thNight
13%8%26%36%13%
360
16th to endNight
9%5%28%39%17%
360
July1st to 15thNight
9%222%48%15%1
340
16th to endNight
5%324%47%17%1
499
August1st to 15thNight
7%220%45%21%2
539
16th to endNight
8%420%43%22%1
573
September1st to 15thNight
12%223%40%19%2
540
16th to endNight
12%328%39%14%1
625
October1st to 15thNight
15%6%33%30%12%1
720
16th to endNight
13%9%35%32%8%
870
November1st to 15thNight
13%12%38%26%8%
950
16th to endNight
11%12%44%26%5%
975
December1st to 15thNight
14%9%37%27%10%1
905
16th to endNight
12%10%38%26%10%1
960
Page generated at 2017-12-02 08:14:22. Version ac04

Copyright 2017 A. Danko


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