Joe Kurz Wildlife Management Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Joe Kurz Wildlife Management Area clear sky chart from 2005-11-05 to 2017-09-22.

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
49%
15500
23%
47002
16%
15456
57%
15456
28%
28945

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
25%
720
23%
2327
9%
716
42%
716
21%
1439
January16th to endNight
26%
768
23%
2412
11%
768
40%
768
21%
1553
February1st to 15thNight
29%
704
25%
2110
10%
700
44%
700
26%
1295
February16th to endNight
25%
631
25%
1893
9%
631
40%
631
24%
1167
March1st to 15thNight
30%
720
24%
2071
11%
720
42%
720
27%
1273
March16th to endNight
39%
768
23%
2112
12%
768
47%
768
30%
1302
April1st to 15thNight
42%
626
25%
1884
18%
626
51%
626
31%
1090
April16th to endNight
48%
540
26%
1728
18%
540
58%
540
32%
973
May1st to 15thNight
52%
540
22%
1620
15%
540
59%
540
31%
977
May16th to endNight
63%
561
21%
1682
15%
561
66%
561
34%
1011
June1st to 15thNight
70%
540
17%
1620
15%
540
71%
540
29%
1039
June16th to endNight
75%
540
18%
1620
16%
540
76%
540
33%
989
July1st to 15thNight
75%
510
13%
1530
12%
510
75%
510
28%
1009
July16th to endNight
74%
564
15%
1595
15%
531
77%
531
29%
1027
August1st to 15thNight
75%
539
16%
1684
18%
536
75%
536
27%
1108
August16th to endNight
64%
573
18%
1910
19%
573
66%
573
22%
1280
September1st to 15thNight
66%
699
20%
1959
19%
699
67%
699
28%
1293
September16th to endNight
62%
685
24%
1892
19%
685
66%
685
29%
1239
October1st to 15thNight
56%
660
32%
1815
23%
660
64%
660
38%
1067
October16th to endNight
52%
704
34%
2100
26%
704
63%
704
38%
1153
November1st to 15thNight
50%
700
30%
2262
24%
700
62%
700
34%
1207
November16th to endNight
39%
720
27%
2340
17%
720
54%
720
28%
1339
December1st to 15thNight
35%
720
24%
2340
16%
720
48%
720
24%
1437
December16th to endNight
32%
768
20%
2496
14%
768
42%
768
19%
1678

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
12%5%25%5%35%5%5%7%40%
47869
Night
11%42442445%7%46%
47203
TransparencyDay
40%7%11%17%17%5%
47570
Night
35%6%11%19%19%7%
47006
SeeingDay
14%6%20%24%21%12%
5385
Night
14%8%22%28%22%4
15502

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
16%6%34423346%44%
1611
16th to endDay
16%6%34423345%44%
1809
February1st to 15thDay
15%7%24334446%44%
1750
16th to endDay
15%6%25%423447%42%
1580
March1st to 15thDay
15%7%26%423446%42%
1887
16th to endDay
15%5%245%2445%7%42%
2111
April1st to 15thDay
11%5%35%424446%46%
2073
16th to endDay
9%325%6%2345%6%50%
2232
May1st to 15thDay
10%5%25%5%3445%7%44%
2331
16th to endDay
8%426%6%35%6%6%8%41%
2431
June1st to 15thDay
9%5%26%7%47%6%7%10%31%
2340
16th to endDay
4325%6%5%7%6%7%12%39%
2340
July1st to 15thDay
9%5%26%7%5%8%6%9%12%26%
2340
16th to endDay
7%426%8%48%8%8%11%27%
2465
August1st to 15thDay
8%5%26%7%5%7%8%9%11%27%
2262
16th to endDay
13%6%36%6%47%7%6%9%27%
2292
September1st to 15thDay
14%5%26%6%36%6%6%6%35%
1986
16th to endDay
16%5%15%5%24446%40%
1881
October1st to 15thDay
14%5%13313336%53%
1815
16th to endDay
11%41232334358%
1771
November1st to 15thDay
11%413414335%55%
1594
16th to endDay
12%5%14423446%50%
1620
December1st to 15thDay
15%7%25%423446%44%
1620
16th to endDay
21%8%46%423445%35%
1728
January1st to 15thNight
15%6%24423345%46%
2327
16th to endNight
17%6%3442334443%
2412
February1st to 15thNight
14%415%422335%48%
2103
16th to endNight
14%5%2432435%5%47%
1893
March1st to 15thNight
12%5%24434246%49%
2071
16th to endNight
10%5%2432335%8%48%
2112
April1st to 15thNight
11%5%1342345%7%50%
1884
16th to endNight
8%32442445%7%52%
1728
May1st to 15thNight
8%414326%45%8%49%
1619
16th to endNight
7%3245%25%5%6%8%47%
1682
June1st to 15thNight
6%4245%35%6%6%10%43%
1620
16th to endNight
43245%35%6%9%14%40%
1620
July1st to 15thNight
6%226%5%37%6%8%12%37%
1620
16th to endNight
5%3245%46%8%8%12%36%
1703
August1st to 15thNight
4325%6%36%6%7%12%37%
1695
16th to endNight
10%6%36%5%35%5%6%11%35%
1910
September1st to 15thNight
8%416%5%35%5%7%10%40%
1959
16th to endNight
10%6%16%435%45%8%42%
1892
October1st to 15thNight
12%412213346%54%
1815
16th to endNight
9%31342333460%
2100
November1st to 15thNight
10%413322335%58%
2262
16th to endNight
12%424423345%52%
2340
December1st to 15thNight
13%5%26%5%23346%46%
2340
16th to endNight
19%6%35%424446%37%
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
40%48%14%26%5%
1612
16th to endDay
41%46%16%22%8%
1809
February1st to 15thDay
40%37%19%22%5%
1752
16th to endDay
42%46%17%22%6%
1580
March1st to 15thDay
42%5%7%16%20%7%
1887
16th to endDay
41%410%21%18%4
2112
April1st to 15thDay
38%48%20%19%8%
2073
16th to endDay
32%6%10%19%24%6%
2232
May1st to 15thDay
38%7%11%17%21%4
2331
16th to endDay
36%8%13%23%14%2
2435
June1st to 15thDay
45%9%15%20%8%1
2340
16th to endDay
36%10%17%20%14%2
2340
July1st to 15thDay
44%13%19%14%5%1
2201
16th to endDay
44%13%17%16%7%
2310
August1st to 15thDay
44%13%17%16%7%
2249
16th to endDay
49%12%14%13%9%
2292
September1st to 15thDay
45%9%12%14%13%3
1986
16th to endDay
42%6%9%20%16%3
1881
October1st to 15thDay
32%5%10%19%24%7%
1815
16th to endDay
30%36%15%31%12%
1771
November1st to 15thDay
32%36%16%27%13%
1594
16th to endDay
35%48%15%25%10%
1620
December1st to 15thDay
41%48%20%17%8%
1620
16th to endDay
50%37%16%13%7%
1728
January1st to 15thNight
40%46%18%24%6%
2327
16th to endNight
43%35%15%21%9%
2412
February1st to 15thNight
38%35%19%20%12%
2112
16th to endNight
38%46%17%24%8%
1893
March1st to 15thNight
36%49%19%20%8%
2071
16th to endNight
33%5%10%22%21%6%
2112
April1st to 15thNight
32%5%8%23%21%9%
1884
16th to endNight
30%5%10%21%21%9%
1728
May1st to 15thNight
32%8%12%19%23%3
1620
16th to endNight
31%7%15%24%15%4
1684
June1st to 15thNight
33%11%16%26%11%
1620
16th to endNight
30%10%20%23%13%2
1620
July1st to 15thNight
34%12%22%19%7%2
1530
16th to endNight
33%12%24%19%8%1
1595
August1st to 15thNight
36%11%20%21%10%1
1684
16th to endNight
41%10%16%16%12%1
1910
September1st to 15thNight
36%10%13%19%15%4
1959
16th to endNight
37%8%10%20%16%5%
1892
October1st to 15thNight
30%410%20%21%11%
1815
16th to endNight
28%45%14%32%16%
2100
November1st to 15thNight
29%36%15%29%15%
2262
16th to endNight
33%5%6%16%25%13%
2340
December1st to 15thNight
39%48%18%20%8%
2340
16th to endNight
47%47%16%17%6%
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
25%15%33%17%43
90
16th to endDay
20%25%45%26%
96
February1st to 15thDay
20%23%40%14%2
90
16th to endDay
22%16%49%12%
81
March1st to 15thDay
20%16%35%18%7%1
177
16th to endDay
14%14%31%26%12%
288
April1st to 15thDay
18%15%28%17%18%1
270
16th to endDay
11%7%32%23%19%5%
270
May1st to 15thDay
14%9%30%19%13%12%
288
16th to endDay
11%5%17%32%20%12%
331
June1st to 15thDay
10%113%26%28%20%
315
16th to endDay
6%15%28%24%23%
315
July1st to 15thDay
6%10%24%31%26%
305
16th to endDay
7%6%23%35%25%
326
August1st to 15thDay
12%17%26%31%20%
313
16th to endDay
14%19%27%29%17%
332
September1st to 15thDay
16%211%19%33%16%
315
16th to endDay
16%113%32%25%10%
278
October1st to 15thDay
18%320%27%21%7%
255
16th to endDay
15%6%19%27%23%7%
272
November1st to 15thDay
23%20%20%21%12%
102
16th to endDay
11%13%37%25%11%1
90
December1st to 15thDay
24%17%34%14%8%
90
16th to endDay
35%14%29%16%4
96
January1st to 15thNight
21%17%29%23%6%
720
16th to endNight
22%15%31%26%4
768
February1st to 15thNight
19%13%32%29%5%
704
16th to endNight
17%18%36%24%3
631
March1st to 15thNight
16%14%35%25%7%
720
16th to endNight
17%11%27%28%15%
768
April1st to 15thNight
15%11%27%29%15%
626
16th to endNight
10%8%27%33%17%1
540
May1st to 15thNight
9%6%27%29%24%3
540
16th to endNight
9%216%35%30%5%
563
June1st to 15thNight
7%11%35%33%10%
540
16th to endNight
5%18%29%42%12%
540
July1st to 15thNight
7%16%25%44%14%
510
16th to endNight
7%6%23%49%12%
564
August1st to 15thNight
5%6%28%46%12%
539
16th to endNight
13%8%24%39%12%
573
September1st to 15thNight
10%19%25%40%11%
699
16th to endNight
13%211%35%33%2
685
October1st to 15thNight
15%420%31%23%5%
660
16th to endNight
11%8%22%29%23%3
704
November1st to 15thNight
13%8%24%31%20%2
700
16th to endNight
15%13%27%28%14%
720
December1st to 15thNight
16%12%30%26%12%1
720
16th to endNight
23%12%27%28%7%
768
Page generated at 2017-09-23 06:43:35. Version ac04

Copyright 2017 A. Danko


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