Loggers Lake Campground
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Loggers Lake Campground clear sky chart from 2005-11-05 to 2017-10-16.

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%
15894
23%
47237
13%
15848
48%
15848
29%
28814

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
18%
900
23%
2407
5%
895
33%
895
23%
1561
January16th to endNight
19%
960
24%
2496
6%
960
31%
960
27%
1606
February1st to 15thNight
19%
847
19%
2256
4%
844
28%
844
23%
1478
February16th to endNight
18%
631
23%
1893
6%
631
32%
631
23%
1169
March1st to 15thNight
22%
606
20%
2046
9%
606
33%
606
19%
1328
March16th to endNight
25%
576
15%
2064
9%
576
33%
576
18%
1370
April1st to 15thNight
26%
539
22%
1797
10%
539
43%
539
27%
1031
April16th to endNight
31%
540
21%
1800
13%
540
45%
540
25%
1110
May1st to 15thNight
37%
540
19%
1731
12%
540
48%
540
29%
1055
May16th to endNight
46%
563
19%
1498
12%
561
51%
561
28%
1015
June1st to 15thNight
62%
540
22%
1440
15%
540
67%
540
43%
830
June16th to endNight
64%
540
25%
1440
17%
540
69%
540
46%
817
July1st to 15thNight
66%
510
18%
1360
15%
510
68%
510
39%
824
July16th to endNight
76%
564
23%
1591
22%
531
80%
531
44%
850
August1st to 15thNight
75%
539
23%
1664
26%
536
77%
536
40%
901
August16th to endNight
72%
573
25%
1910
28%
573
74%
573
37%
1031
September1st to 15thNight
64%
540
27%
1800
27%
540
68%
540
31%
1023
September16th to endNight
57%
636
31%
1941
22%
636
64%
636
35%
1099
October1st to 15thNight
47%
720
29%
2160
19%
720
55%
720
36%
1224
October16th to endNight
37%
708
30%
2124
17%
708
50%
708
32%
1230
November1st to 15thNight
35%
700
31%
2229
17%
700
51%
700
33%
1216
November16th to endNight
28%
762
24%
2382
14%
762
39%
762
24%
1488
December1st to 15thNight
23%
900
19%
2520
7%
900
34%
900
21%
1713
December16th to endNight
20%
960
20%
2688
6%
960
33%
960
21%
1845

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
13%6%25%5%3445%7%41%
48181
Night
12%6%24423447%47%
47422
TransparencyDay
40%411%24%15%2
47872
Night
37%311%25%18%3
47237
SeeingDay
15%8%24%27%18%5%
5920
Night
17%10%28%26%14%1
15894

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%5%25%424345%44%
1528
16th to endDay
14%7%25%423346%45%
1728
February1st to 15thDay
15%8%26%424435%39%
1603
16th to endDay
14%7%45%5%3445%5%39%
1580
March1st to 15thDay
17%8%36%424346%39%
1924
16th to endDay
18%10%35%5%35%445%32%
2158
April1st to 15thDay
13%7%35%424346%44%
2151
16th to endDay
20%6%35%5%23446%35%
2160
May1st to 15thDay
16%6%25%5%25%5%6%7%36%
2217
16th to endDay
13%5%35%6%35%46%7%37%
2617
June1st to 15thDay
8%426%6%45%5%6%8%41%
2520
16th to endDay
6%2135%35%6%7%9%48%
2520
July1st to 15thDay
9%425%6%35%5%7%9%39%
2520
16th to endDay
4326%5%46%7%7%11%40%
2466
August1st to 15thDay
9%425%5%45%6%7%9%38%
2285
16th to endDay
9%4246%37%6%6%9%39%
2292
September1st to 15thDay
11%5%244245%5%7%45%
2160
16th to endDay
12%6%14424446%48%
2006
October1st to 15thDay
13%6%35%423345%48%
1800
16th to endDay
14%42322324454%
1769
November1st to 15thDay
12%5%2431345%5%51%
1626
16th to endDay
18%7%25%42323444%
1575
December1st to 15thDay
18%7%37%424345%37%
1440
16th to endDay
18%10%34324445%37%
1536
January1st to 15thNight
15%7%24423346%44%
2407
16th to endNight
12%6%45%42345%6%45%
2496
February1st to 15thNight
14%8%35%423346%43%
2247
16th to endNight
13%7%36%423346%44%
1893
March1st to 15thNight
17%8%35%5%13445%41%
2046
16th to endNight
18%8%36%423446%36%
2064
April1st to 15thNight
10%425%423347%50%
1797
16th to endNight
16%5%35%423347%43%
1800
May1st to 15thNight
15%42332445%7%45%
1730
16th to endNight
11%7%26%44436%8%40%
1496
June1st to 15thNight
5%215%325%46%8%52%
1440
16th to endNight
5%2224136%6%11%52%
1440
July1st to 15thNight
7%3245%2345%7%53%
1440
16th to endNight
42233245%7%10%53%
1698
August1st to 15thNight
5%213435%5%7%9%51%
1674
16th to endNight
6%4244245%6%8%52%
1910
September1st to 15thNight
9%415%335%447%50%
1800
16th to endNight
9%5%14413347%53%
1941
October1st to 15thNight
10%5%23323346%53%
2160
16th to endNight
15%5%1331233455%
2124
November1st to 15thNight
10%5%23323345%55%
2229
16th to endNight
19%7%24412335%45%
2382
December1st to 15thNight
21%7%24423348%37%
2520
16th to endNight
19%9%35%323345%39%
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
41%210%26%16%2
1529
16th to endDay
40%213%28%13%2
1728
February1st to 15thDay
46%311%24%12%1
1605
16th to endDay
46%311%24%11%3
1580
March1st to 15thDay
46%39%21%14%3
1924
16th to endDay
52%412%20%9%1
2160
April1st to 15thDay
40%310%23%19%2
2151
16th to endDay
49%310%20%13%1
2160
May1st to 15thDay
45%6%12%22%13%
2217
16th to endDay
45%6%13%20%12%2
2621
June1st to 15thDay
38%5%12%26%16%1
2520
16th to endDay
28%7%17%26%17%3
2520
July1st to 15thDay
39%6%12%26%11%3
2371
16th to endDay
33%8%16%26%12%1
2311
August1st to 15thDay
36%6%14%25%15%1
2271
16th to endDay
37%6%14%21%14%5%
2292
September1st to 15thDay
36%5%10%26%17%4
2160
16th to endDay
35%5%7%28%21%2
2006
October1st to 15thDay
37%38%25%21%3
1800
16th to endDay
33%18%29%21%5%
1769
November1st to 15thDay
34%38%26%19%8%
1626
16th to endDay
44%17%26%18%1
1575
December1st to 15thDay
48%210%22%13%1
1440
16th to endDay
48%312%19%13%2
1536
January1st to 15thNight
41%210%24%18%2
2407
16th to endNight
39%212%27%16%1
2496
February1st to 15thNight
41%311%26%14%2
2256
16th to endNight
40%212%25%17%1
1893
March1st to 15thNight
45%48%21%17%3
2046
16th to endNight
48%412%22%11%
2064
April1st to 15thNight
34%412%26%18%4
1797
16th to endNight
40%310%28%14%2
1800
May1st to 15thNight
37%416%22%17%1
1731
16th to endNight
40%7%14%19%14%3
1498
June1st to 15thNight
28%416%29%20%1
1440
16th to endNight
23%6%15%30%18%5%
1440
July1st to 15thNight
31%5%15%27%15%4
1360
16th to endNight
22%7%18%33%17%1
1591
August1st to 15thNight
25%6%16%29%19%2
1664
16th to endNight
28%5%14%25%20%5%
1910
September1st to 15thNight
33%47%27%21%5%
1800
16th to endNight
31%49%25%25%3
1941
October1st to 15thNight
32%29%26%22%5%
2160
16th to endNight
33%27%27%22%5%
2124
November1st to 15thNight
30%28%27%21%7%
2229
16th to endNight
42%26%25%20%1
2382
December1st to 15thNight
47%311%20%15%1
2520
16th to endNight
48%211%21%13%3
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
36%20%36%6%
90
16th to endDay
20%32%34%10%2
96
February1st to 15thDay
24%26%38%6%3
90
16th to endDay
28%14%41%11%3
81
March1st to 15thDay
35%15%37%11%
90
16th to endDay
27%20%33%14%4
144
April1st to 15thDay
20%13%34%22%8%
270
16th to endDay
25%14%28%18%10%2
270
May1st to 15thDay
14%17%34%22%9%2
336
16th to endDay
16%10%35%23%11%3
517
June1st to 15thDay
8%5%23%35%20%7%
495
16th to endDay
6%427%38%17%5%
495
July1st to 15thDay
13%317%36%24%5%
475
16th to endDay
4112%32%36%13%
515
August1st to 15thDay
12%113%31%32%9%
438
16th to endDay
15%113%30%28%10%
332
September1st to 15thDay
13%6%13%25%29%12%
315
16th to endDay
13%416%27%25%11%
271
October1st to 15thDay
16%12%28%31%8%2
135
16th to endDay
15%10%30%35%8%1
99
November1st to 15thDay
12%7%33%30%13%3
90
16th to endDay
45%17%15%14%6%
90
December1st to 15thDay
21%20%36%15%33
90
16th to endDay
26%28%39%5%1
96
January1st to 15thNight
24%20%35%16%3
900
16th to endNight
17%20%40%19%3
960
February1st to 15thNight
21%19%37%19%1
847
16th to endNight
21%18%39%18%2
631
March1st to 15thNight
25%13%35%22%2
606
16th to endNight
22%12%35%22%6%
576
April1st to 15thNight
14%15%39%25%4
539
16th to endNight
19%9%35%25%8%
540
May1st to 15thNight
17%6%35%28%11%
540
16th to endNight
14%427%33%15%3
563
June1st to 15thNight
7%220%39%27%3
540
16th to endNight
7%122%40%26%2
540
July1st to 15thNight
9%113%40%29%5%
510
16th to endNight
5%19%35%39%9%
564
August1st to 15thNight
6%9%32%45%5%
539
16th to endNight
7%112%34%37%6%
573
September1st to 15thNight
10%314%30%35%5%
540
16th to endNight
13%418%26%31%4
636
October1st to 15thNight
13%6%27%26%22%3
720
16th to endNight
20%10%29%27%10%
708
November1st to 15thNight
14%12%34%26%12%
700
16th to endNight
24%13%30%24%6%
762
December1st to 15thNight
27%15%30%21%4
900
16th to endNight
27%15%32%21%2
960
Page generated at 2017-10-17 15:35:21. Version ac04

Copyright 2017 A. Danko


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