Great Bend
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Great Bend clear sky chart from 2005-11-05 to 2017-04-08.

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
44%
15394
26%
45444
15%
15350
54%
15350
38%
25469

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
37%
900
30%
2327
13%
895
48%
895
39%
1361
January16th to endNight
39%
960
33%
2496
14%
960
51%
960
43%
1418
February1st to 15thNight
35%
780
21%
2190
9%
777
45%
777
32%
1356
February16th to endNight
33%
632
30%
1894
12%
632
48%
632
35%
1051
March1st to 15thNight
39%
627
26%
2067
15%
627
51%
627
34%
1121
March16th to endNight
30%
576
21%
2112
13%
576
42%
576
24%
1235
April1st to 15thNight
31%
518
22%
1803
14%
518
46%
518
29%
997
April16th to endNight
32%
495
21%
1496
11%
495
47%
495
28%
920
May1st to 15thNight
36%
494
22%
1485
15%
494
48%
494
28%
924
May16th to endNight
47%
513
17%
1540
12%
513
54%
513
32%
918
June1st to 15thNight
47%
495
20%
1485
11%
495
55%
495
41%
797
June16th to endNight
58%
495
23%
1485
14%
495
66%
495
52%
731
July1st to 15thNight
65%
465
21%
1395
15%
465
69%
465
44%
741
July16th to endNight
68%
522
24%
1468
22%
489
72%
489
45%
776
August1st to 15thNight
70%
494
22%
1475
23%
491
73%
491
39%
809
August16th to endNight
64%
525
24%
1664
26%
525
69%
525
39%
904
September1st to 15thNight
53%
495
24%
1787
21%
495
63%
495
31%
984
September16th to endNight
53%
492
32%
1815
28%
492
62%
492
38%
882
October1st to 15thNight
45%
536
33%
1856
25%
536
53%
536
33%
972
October16th to endNight
46%
745
32%
2153
15%
745
57%
745
49%
1091
November1st to 15thNight
47%
875
33%
2275
15%
875
58%
875
51%
1217
November16th to endNight
43%
900
32%
2340
14%
900
54%
900
45%
1304
December1st to 15thNight
38%
900
26%
2340
12%
900
47%
900
37%
1413
December16th to endNight
37%
960
31%
2496
15%
960
48%
960
35%
1547

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
8%42442445%7%53%
45815
Night
8%423323347%55%
45640
Cloud CoverDay
8%42442345%7%53%
45813
Night
7%423323347%55%
45640
TransparencyDay
30%5%12%27%19%4
45513
Night
28%412%26%21%6%
45445
SeeingDay
10%6%29%34%16%2
5113
Night
9%7%33%36%11%
15399

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
5%5%24313346%58%
1611
16th to endDay
7%425%323448%53%
1728
February1st to 15thDay
5%7%35%6%25%445%49%
1681
16th to endDay
6%5%2332335%7%56%
1580
March1st to 15thDay
7%6%3332445%7%51%
1893
16th to endDay
14%6%23423346%47%
2112
April1st to 15thDay
12%6%2442335%6%48%
1981
16th to endDay
13%6%25%4245%45%43%
2134
May1st to 15thDay
11%42432435%7%50%
2136
16th to endDay
9%425%5%245%6%9%44%
2222
June1st to 15thDay
6%313424447%54%
2145
16th to endDay
4223235%5%9%60%
2145
July1st to 15thDay
4325%5%25%6%7%9%47%
2145
16th to endDay
5%2144245%6%8%53%
2284
August1st to 15thDay
7%31443347%10%48%
2145
16th to endDay
6%314325%448%54%
2184
September1st to 15thDay
10%424424446%51%
1843
16th to endDay
7%313314446%58%
1815
October1st to 15thDay
12%323212236%58%
1763
16th to endDay
7%5%12312336%62%
1717
November1st to 15thDay
5%212323336%64%
1583
16th to endDay
8%412211235%65%
1620
December1st to 15thDay
9%7%25%5%2335%6%50%
1620
16th to endDay
8%8%35%423336%49%
1728
January1st to 15thNight
6%5%34423235%58%
2327
16th to endNight
5%42431334461%
2496
February1st to 15thNight
7%7%35%5%24345%50%
2180
16th to endNight
7%42432335%5%55%
1894
March1st to 15thNight
8%42432345%7%53%
2067
16th to endNight
13%7%24313336%49%
2112
April1st to 15thNight
11%5%1421435%8%50%
1803
16th to endNight
13%5%2442335%7%47%
1496
May1st to 15thNight
12%5%2442345%6%48%
1484
16th to endNight
10%3233245%6%10%47%
1539
June1st to 15thNight
6%21222347%9%55%
1485
16th to endNight
21122135%5%12%61%
1485
July1st to 15thNight
41134235%6%10%54%
1485
16th to endNight
6%21231346%10%55%
1576
August1st to 15thNight
432342446%11%51%
1485
16th to endNight
6%3135%24446%57%
1664
September1st to 15thNight
9%42442335%7%51%
1787
16th to endNight
5%314323446%60%
1815
October1st to 15thNight
10%422312335%58%
1856
16th to endNight
7%31221224466%
2153
November1st to 15thNight
5%312212346%66%
2275
16th to endNight
8%412213335%62%
2340
December1st to 15thNight
8%5%24314346%54%
2340
16th to endNight
10%6%34313347%50%
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
5%6%2431335%6%58%
1611
16th to endDay
7%424422447%54%
1728
February1st to 15thDay
5%7%35%5%44436%49%
1681
16th to endDay
6%5%2332345%7%56%
1580
March1st to 15thDay
7%6%2432445%7%51%
1893
16th to endDay
14%6%24323346%47%
2110
April1st to 15thDay
11%6%24424346%48%
1981
16th to endDay
13%6%35%5%24446%43%
2134
May1st to 15thDay
11%42432445%6%50%
2136
16th to endDay
10%3245%25%46%9%44%
2222
June1st to 15thDay
6%31342445%7%55%
2145
16th to endDay
42123145%6%8%59%
2145
July1st to 15thDay
4325%5%45%5%6%10%47%
2145
16th to endDay
5%2243245%6%9%52%
2284
August1st to 15thDay
7%4144245%6%10%49%
2145
16th to endDay
6%31342445%8%53%
2184
September1st to 15thDay
10%4245%24446%51%
1843
16th to endDay
7%313324446%58%
1815
October1st to 15thDay
12%413312236%58%
1763
16th to endDay
7%413312336%62%
1717
November1st to 15thDay
5%212323345%64%
1583
16th to endDay
8%412212235%65%
1620
December1st to 15thDay
9%7%245%22446%49%
1620
16th to endDay
8%7%36%332337%48%
1728
January1st to 15thNight
6%6%25%423235%58%
2327
16th to endNight
5%425%32333461%
2496
February1st to 15thNight
7%7%34424446%50%
2180
16th to endNight
7%42441335%6%55%
1894
March1st to 15thNight
7%42442445%7%53%
2067
16th to endNight
13%7%34313336%49%
2112
April1st to 15thNight
11%42331345%7%51%
1803
16th to endNight
13%5%1432335%7%47%
1496
May1st to 15thNight
11%5%25%423446%48%
1484
16th to endNight
11%31332446%10%47%
1539
June1st to 15thNight
6%21332346%10%55%
1485
16th to endNight
212231346%11%61%
1485
July1st to 15thNight
421343447%10%54%
1485
16th to endNight
6%21232446%12%54%
1576
August1st to 15thNight
44145%145%7%9%51%
1485
16th to endNight
5%32432445%5%57%
1664
September1st to 15thNight
8%424424346%52%
1787
16th to endNight
5%314323445%61%
1815
October1st to 15thNight
10%413313336%58%
1856
16th to endNight
7%31221233466%
2153
November1st to 15thNight
5%212213346%65%
2275
16th to endNight
8%412213335%62%
2340
December1st to 15thNight
8%5%23413347%54%
2340
16th to endNight
9%7%34312347%50%
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
26%414%33%18%2
1612
16th to endDay
29%414%31%16%3
1728
February1st to 15thDay
35%6%17%24%10%5%
1682
16th to endDay
26%315%27%19%6%
1580
March1st to 15thDay
31%5%12%24%21%5%
1893
16th to endDay
38%5%11%24%15%3
2112
April1st to 15thDay
35%6%11%27%14%4
1981
16th to endDay
40%5%10%28%13%1
2134
May1st to 15thDay
33%6%14%24%18%2
2136
16th to endDay
36%7%14%25%12%3
2226
June1st to 15thDay
27%7%16%25%16%6%
2145
16th to endDay
20%6%11%28%25%7%
2145
July1st to 15thDay
30%7%12%25%19%4
2006
16th to endDay
25%7%13%26%21%4
2129
August1st to 15thDay
28%7%18%24%15%5%
2131
16th to endDay
27%6%11%28%18%7%
2184
September1st to 15thDay
33%5%9%25%16%9%
1843
16th to endDay
25%5%9%30%23%4
1815
October1st to 15thDay
29%311%25%23%6%
1763
16th to endDay
24%29%29%27%6%
1717
November1st to 15thDay
21%310%25%30%7%
1583
16th to endDay
23%29%30%27%6%
1620
December1st to 15thDay
34%5%13%28%16%1
1620
16th to endDay
36%311%26%18%2
1728
January1st to 15thNight
30%210%29%22%3
2327
16th to endNight
26%310%30%23%5%
2496
February1st to 15thNight
36%414%24%14%5%
2190
16th to endNight
29%411%26%19%8%
1894
March1st to 15thNight
29%411%24%21%8%
2067
16th to endNight
37%411%23%18%4
2112
April1st to 15thNight
31%5%13%24%21%3
1803
16th to endNight
36%5%14%20%20%2
1496
May1st to 15thNight
35%7%12%23%17%3
1485
16th to endNight
30%8%19%25%12%3
1541
June1st to 15thNight
22%7%19%26%19%4
1485
16th to endNight
16%7%14%28%27%6%
1485
July1st to 15thNight
22%6%14%28%22%5%
1395
16th to endNight
22%6%13%32%21%4
1468
August1st to 15thNight
26%6%15%29%16%5%
1475
16th to endNight
27%5%10%27%21%7%
1664
September1st to 15thNight
32%5%11%23%17%9%
1787
16th to endNight
24%5%9%23%31%5%
1815
October1st to 15thNight
28%5%9%23%25%8%
1856
16th to endNight
21%28%26%30%9%
2153
November1st to 15thNight
20%39%23%31%11%
2275
16th to endNight
25%38%28%25%9%
2340
December1st to 15thNight
30%412%29%19%2
2340
16th to endNight
33%412%25%19%4
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%6%41%32%7%
90
16th to endDay
15%8%47%17%9%1
96
February1st to 15thDay
10%5%48%27%7%
90
16th to endDay
217%43%22%13%1
81
March1st to 15thDay
416%50%18%10%
90
16th to endDay
16%11%36%28%7%
96
April1st to 15thDay
14%17%34%27%41
161
16th to endDay
18%14%33%25%7%1
364
May1st to 15thDay
11%11%36%27%11%1
393
16th to endDay
15%8%29%29%12%4
437
June1st to 15thDay
8%6%30%37%15%1
420
16th to endDay
3428%40%20%2
420
July1st to 15thDay
5%320%46%21%3
400
16th to endDay
5%115%42%29%3
445
August1st to 15thDay
9%111%45%28%3
418
16th to endDay
7%123%39%23%3
352
September1st to 15thDay
5%332%40%12%5%
118
16th to endDay
10%7%15%30%25%11%
90
October1st to 15thDay
7%435%31%18%2
90
16th to endDay
9%140%28%17%3
96
November1st to 15thDay
10%427%36%17%3
90
16th to endDay
20%7%43%20%7%1
90
December1st to 15thDay
13%13%44%20%5%3
90
16th to endDay
21%11%45%18%2
96
January1st to 15thNight
9%9%38%34%7%
900
16th to endNight
7%8%40%35%7%
960
February1st to 15thNight
11%7%39%36%4
782
16th to endNight
8%12%41%32%4
632
March1st to 15thNight
9%12%35%35%6%
627
16th to endNight
16%12%39%25%5%
576
April1st to 15thNight
14%13%38%27%6%
518
16th to endNight
15%12%36%27%6%
495
May1st to 15thNight
13%8%35%34%6%
495
16th to endNight
12%8%29%33%14%1
515
June1st to 15thNight
6%6%37%37%11%
495
16th to endNight
2232%48%12%1
495
July1st to 15thNight
5%121%52%18%1
465
16th to endNight
7%118%46%25%
522
August1st to 15thNight
5%15%55%20%1
494
16th to endNight
6%120%44%24%2
525
September1st to 15thNight
10%127%38%19%2
495
16th to endNight
6%429%39%17%1
492
October1st to 15thNight
12%8%30%31%15%1
536
16th to endNight
8%5%37%33%13%1
745
November1st to 15thNight
7%8%33%35%14%
875
16th to endNight
10%8%35%34%10%1
900
December1st to 15thNight
11%9%38%35%4
900
16th to endNight
13%9%34%35%7%
960
Page generated at 2017-04-09 05:54:17. Version ac04

Copyright 2017 A. Danko


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