Pardee Lake
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Pardee Lake clear sky chart from 2005-11-05 to 2018-10-27.

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
37%
17393
16%
51386
10%
17351
43%
17351
21%
35440

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%
975
10%
2716
4%
970
23%
970
13%
2139
January16th to endNight
20%
949
8%
2821
3%
949
25%
949
12%
2231
February1st to 15thNight
18%
761
10%
2438
4%
761
24%
761
11%
1866
February16th to endNight
24%
683
15%
2049
6%
683
32%
683
15%
1498
March1st to 15thNight
28%
780
16%
2262
9%
780
34%
780
19%
1612
March16th to endNight
33%
832
19%
2288
11%
832
40%
832
22%
1597
April1st to 15thNight
27%
620
14%
1957
7%
620
34%
620
18%
1362
April16th to endNight
36%
579
20%
1735
9%
579
45%
579
25%
1134
May1st to 15thNight
39%
585
15%
1755
9%
585
45%
585
22%
1207
May16th to endNight
51%
610
14%
1800
11%
609
55%
609
30%
1135
June1st to 15thNight
54%
585
15%
1560
12%
585
58%
585
34%
977
June16th to endNight
58%
585
16%
1560
12%
585
62%
585
37%
970
July1st to 15thNight
67%
555
19%
1480
16%
555
69%
555
41%
870
July16th to endNight
68%
612
20%
1620
17%
579
71%
579
42%
936
August1st to 15thNight
68%
575
21%
1715
18%
572
71%
572
37%
998
August16th to endNight
63%
621
21%
1902
17%
621
67%
621
33%
1115
September1st to 15thNight
59%
712
26%
2077
20%
712
63%
712
34%
1223
September16th to endNight
58%
777
25%
2145
18%
777
62%
777
34%
1300
October1st to 15thNight
44%
780
19%
2229
15%
780
49%
780
25%
1505
October16th to endNight
27%
816
17%
2569
10%
816
37%
816
18%
1767
November1st to 15thNight
35%
760
18%
2471
16%
760
40%
760
21%
1616
November16th to endNight
25%
780
15%
2538
9%
780
33%
780
16%
1810
December1st to 15thNight
18%
821
8%
2771
3%
821
24%
821
10%
2126
December16th to endNight
15%
1040
8%
2928
2%
1040
21%
1040
9%
2446

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%8%47%6%35%45%7%33%
52154
Night
15%8%36%5%34446%35%
51563
Cloud CoverDay
14%8%47%6%35%45%7%33%
52164
Night
15%9%36%5%34446%35%
51567
TransparencyDay
49%411%21%11%1
51849
Night
48%411%21%12%1
51386
SeeingDay
17%7%26%24%16%7%
7354
Night
19%7%27%30%13%1
17397

By Month

Percentage Cloud Cover NE (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
18%16%6%11%7%45%445%15%
1552
16th to endDay
16%18%8%9%7%44435%16%
1752
February1st to 15thDay
16%14%6%10%8%45%44419%
1751
16th to endDay
16%14%6%11%7%2445%5%20%
1710
March1st to 15thDay
15%11%5%8%6%34446%28%
2017
16th to endDay
18%9%47%5%33345%32%
2288
April1st to 15thDay
20%10%46%5%34446%29%
2331
16th to endDay
16%8%36%5%33346%38%
2500
May1st to 15thDay
18%7%26%5%35%446%32%
2526
16th to endDay
13%5%35%5%35%45%8%38%
2664
June1st to 15thDay
10%5%35%6%35%5%5%8%41%
2730
16th to endDay
10%5%25%6%37%6%7%10%34%
2730
July1st to 15thDay
7%425%435%5%6%9%46%
2730
16th to endDay
7%5%25%6%36%5%7%9%39%
2798
August1st to 15thDay
8%5%26%6%46%5%6%8%39%
2487
16th to endDay
11%5%25%5%35%5%6%8%38%
2649
September1st to 15thDay
12%5%26%5%346%5%8%40%
2200
16th to endDay
11%5%26%5%245%6%8%40%
2145
October1st to 15thDay
15%7%38%6%24445%37%
2060
16th to endDay
19%10%36%6%33346%32%
1911
November1st to 15thDay
16%8%36%5%34446%36%
1717
16th to endDay
17%12%5%8%5%35%346%28%
1748
December1st to 15thDay
15%13%8%10%6%3445%5%21%
1517
16th to endDay
21%15%8%11%8%3334416%
1641
January1st to 15thNight
22%12%5%7%6%34445%22%
2716
16th to endNight
13%12%8%12%7%45%5%5%6%19%
2821
February1st to 15thNight
16%15%5%8%6%35%34425%
2436
16th to endNight
17%11%5%8%6%34446%27%
2049
March1st to 15thNight
16%10%46%6%34445%33%
2250
16th to endNight
15%7%45%5%35%5%47%35%
2288
April1st to 15thNight
19%9%35%5%3445%6%32%
1957
16th to endNight
16%7%25%5%2445%6%39%
1735
May1st to 15thNight
19%6%25%4345%47%34%
1755
16th to endNight
12%5%24435%349%43%
1798
June1st to 15thNight
10%4245%25%46%8%46%
1560
16th to endNight
9%415%4235%6%9%44%
1560
July1st to 15thNight
7%21443445%7%53%
1560
16th to endNight
5%42443436%10%51%
1722
August1st to 15thNight
5%315%5%35%45%10%48%
1726
16th to endNight
9%424423446%51%
1902
September1st to 15thNight
11%5%1442445%6%50%
2077
16th to endNight
10%5%15%424447%48%
2145
October1st to 15thNight
16%7%25%5%34446%39%
2229
16th to endNight
20%8%25%5%34445%35%
2569
November1st to 15thNight
15%8%35%5%24446%38%
2471
16th to endNight
19%11%5%5%5%2345%5%29%
2538
December1st to 15thNight
19%13%6%8%6%35%435%22%
2771
16th to endNight
21%16%6%9%6%35%34416%
2928

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
18%16%5%11%8%44445%16%
1552
16th to endDay
16%18%8%9%7%35%435%16%
1752
February1st to 15thDay
15%14%6%10%8%45%445%19%
1751
16th to endDay
16%14%6%10%8%2446%5%20%
1710
March1st to 15thDay
16%11%5%8%6%335%46%27%
2028
16th to endDay
18%9%5%7%5%34346%31%
2287
April1st to 15thDay
20%10%46%5%24446%29%
2331
16th to endDay
15%8%36%5%34346%38%
2500
May1st to 15thDay
19%7%26%6%35%446%32%
2526
16th to endDay
13%6%35%5%35%46%8%38%
2664
June1st to 15thDay
10%5%35%5%35%5%5%8%41%
2730
16th to endDay
10%5%25%5%46%6%7%10%34%
2730
July1st to 15thDay
7%424425%5%6%9%46%
2730
16th to endDay
7%5%25%6%35%5%8%9%39%
2798
August1st to 15thDay
8%5%26%6%47%5%5%8%39%
2487
16th to endDay
11%5%25%6%35%5%6%8%38%
2649
September1st to 15thDay
11%6%26%5%35%5%5%8%40%
2200
16th to endDay
11%5%26%5%345%6%8%40%
2145
October1st to 15thDay
14%7%38%6%34436%37%
2060
16th to endDay
19%11%35%6%24336%32%
1911
November1st to 15thDay
16%8%37%5%34446%36%
1717
16th to endDay
17%12%5%8%5%35%346%28%
1748
December1st to 15thDay
15%13%8%9%6%35%446%20%
1517
16th to endDay
20%16%8%10%7%3434416%
1641
January1st to 15thNight
22%12%47%7%34445%23%
2716
16th to endNight
14%12%7%12%7%45%446%19%
2821
February1st to 15thNight
16%16%5%8%6%4434425%
2429
16th to endNight
16%11%5%8%7%34447%26%
2049
March1st to 15thNight
16%10%46%5%34446%33%
2262
16th to endNight
15%7%35%5%35%447%36%
2288
April1st to 15thNight
19%9%36%5%2445%6%32%
1957
16th to endNight
16%7%25%5%2445%6%39%
1735
May1st to 15thNight
18%6%16%4345%5%7%34%
1754
16th to endNight
12%5%25%434449%43%
1798
June1st to 15thNight
10%5%25%425%45%7%46%
1560
16th to endNight
9%425%4335%6%10%43%
1560
July1st to 15thNight
7%21442445%8%53%
1560
16th to endNight
5%4235%3445%9%51%
1722
August1st to 15thNight
5%4145%35%5%6%9%48%
1726
16th to endNight
9%5%2442345%7%50%
1902
September1st to 15thNight
11%5%1442435%6%50%
2077
16th to endNight
11%426%423447%48%
2145
October1st to 15thNight
16%6%26%434446%39%
2229
16th to endNight
20%9%25%5%34445%35%
2569
November1st to 15thNight
15%8%36%424446%38%
2471
16th to endNight
19%12%45%5%3445%6%29%
2538
December1st to 15thNight
19%13%6%9%5%45%44422%
2771
16th to endNight
21%16%6%10%6%35%44416%
2928

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
69%410%11%3
1553
16th to endDay
70%310%10%4
1752
February1st to 15thDay
67%48%13%6%
1753
16th to endDay
63%39%16%5%
1710
March1st to 15thDay
55%5%11%17%8%
2028
16th to endDay
53%310%22%9%
2288
April1st to 15thDay
55%49%20%10%
2331
16th to endDay
46%313%17%15%2
2500
May1st to 15thDay
52%411%19%10%1
2526
16th to endDay
42%412%25%12%1
2668
June1st to 15thDay
39%5%12%25%15%1
2730
16th to endDay
41%6%13%21%15%
2730
July1st to 15thDay
33%5%11%25%19%4
2581
16th to endDay
37%6%13%23%16%2
2637
August1st to 15thDay
40%5%12%26%12%2
2474
16th to endDay
40%6%10%25%15%1
2649
September1st to 15thDay
41%5%11%25%14%1
2200
16th to endDay
39%5%11%29%13%
2145
October1st to 15thDay
47%410%22%12%1
2060
16th to endDay
53%314%20%7%
1911
November1st to 15thDay
47%411%22%11%1
1717
16th to endDay
56%313%19%6%
1748
December1st to 15thDay
63%311%16%4
1517
16th to endDay
72%311%8%3
1641
January1st to 15thNight
63%310%14%7%
2716
16th to endNight
64%414%12%4
2821
February1st to 15thNight
62%410%15%6%
2438
16th to endNight
57%311%19%7%
2049
March1st to 15thNight
51%411%19%12%1
2262
16th to endNight
47%5%10%23%11%1
2288
April1st to 15thNight
50%410%19%13%
1957
16th to endNight
44%311%19%18%3
1735
May1st to 15thNight
48%410%23%11%2
1755
16th to endNight
38%5%13%23%15%3
1800
June1st to 15thNight
35%5%13%28%15%1
1560
16th to endNight
33%5%16%26%16%
1560
July1st to 15thNight
29%5%10%30%21%4
1480
16th to endNight
28%416%26%20%3
1620
August1st to 15thNight
30%5%13%32%15%2
1715
16th to endNight
32%6%10%28%18%3
1902
September1st to 15thNight
33%410%28%21%1
2077
16th to endNight
34%411%30%17%
2145
October1st to 15thNight
44%5%10%22%15%1
2229
16th to endNight
49%411%23%10%
2569
November1st to 15thNight
45%412%23%12%1
2471
16th to endNight
54%413%20%6%
2538
December1st to 15thNight
62%412%14%6%
2771
16th to endNight
69%410%11%3
2928

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
19%13%40%20%5%
135
16th to endDay
31%11%40%13%3
144
February1st to 15thDay
28%19%40%9%2
135
16th to endDay
30%14%37%15%2
120
March1st to 15thDay
25%12%33%22%6%
213
16th to endDay
24%6%31%26%8%1
352
April1st to 15thDay
27%9%31%21%7%1
330
16th to endDay
18%10%31%20%14%5%
319
May1st to 15thDay
24%9%27%18%13%6%
348
16th to endDay
16%7%21%25%19%9%
420
June1st to 15thDay
12%5%29%29%17%5%
570
16th to endDay
11%6%30%28%17%5%
570
July1st to 15thDay
8%422%28%23%12%
550
16th to endDay
9%319%30%24%12%
514
August1st to 15thDay
9%215%28%23%20%
358
16th to endDay
14%417%20%27%15%
396
September1st to 15thDay
13%5%14%20%25%20%
375
16th to endDay
13%5%17%22%25%15%
374
October1st to 15thDay
19%6%26%26%15%5%
375
16th to endDay
24%10%31%27%6%
259
November1st to 15thDay
17%12%28%25%13%2
135
16th to endDay
20%20%39%15%3
133
December1st to 15thDay
22%24%31%14%7%
90
16th to endDay
24%26%37%10%
139
January1st to 15thNight
27%11%34%20%5%
975
16th to endNight
20%10%36%26%5%
949
February1st to 15thNight
25%12%35%23%3
764
16th to endNight
23%12%32%27%4
683
March1st to 15thNight
22%11%32%26%7%
780
16th to endNight
17%11%31%28%8%1
832
April1st to 15thNight
24%10%33%25%5%
620
16th to endNight
20%6%33%27%10%1
579
May1st to 15thNight
22%5%27%32%10%1
585
16th to endNight
14%324%36%18%2
611
June1st to 15thNight
11%322%46%16%
585
16th to endNight
10%118%47%20%
585
July1st to 15thNight
9%115%39%30%3
555
16th to endNight
5%215%47%26%2
612
August1st to 15thNight
7%15%45%27%3
575
16th to endNight
11%214%35%31%5%
621
September1st to 15thNight
14%317%29%28%6%
712
16th to endNight
13%318%30%28%6%
777
October1st to 15thNight
19%6%24%32%15%2
780
16th to endNight
25%11%32%24%6%
816
November1st to 15thNight
20%10%28%28%11%1
760
16th to endNight
25%12%31%23%7%
780
December1st to 15thNight
25%13%34%22%4
821
16th to endNight
29%10%34%21%3
1040
Page generated at 2018-10-28 08:41:00. Version ac04

Copyright 2018 A. Danko


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