Camping Portage (Laverendrie)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Camping Portage (Laverendrie) clear sky chart from 2005-11-05 to 2017-12-04.

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
25%
14840
10%
47563
7%
14808
30%
14808
13%
36352

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
13%
720
6%
2506
3%
716
16%
716
5%
2144
January16th to endNight
20%
768
8%
2652
5%
768
25%
768
8%
2161
February1st to 15thNight
19%
704
8%
2287
4%
701
25%
701
8%
1872
February16th to endNight
16%
631
8%
1997
4%
631
22%
631
9%
1608
March1st to 15thNight
19%
720
11%
2073
6%
720
25%
720
12%
1638
March16th to endNight
26%
768
18%
2055
8%
768
33%
768
19%
1491
April1st to 15thNight
23%
718
14%
1796
5%
718
28%
718
18%
1356
April16th to endNight
28%
575
16%
1655
8%
575
34%
575
19%
1190
May1st to 15thNight
30%
360
15%
1440
16%
360
37%
360
15%
994
May16th to endNight
29%
375
10%
1497
10%
374
36%
374
13%
1037
June1st to 15thNight
28%
360
6%
1424
5%
360
32%
360
13%
1025
June16th to endNight
38%
360
7%
1260
5%
360
42%
360
20%
821
July1st to 15thNight
40%
340
10%
1265
11%
340
44%
340
21%
796
July16th to endNight
46%
376
10%
1418
13%
354
50%
354
20%
891
August1st to 15thNight
44%
436
11%
1507
11%
434
47%
434
20%
1024
August16th to endNight
42%
660
17%
1806
9%
660
46%
660
28%
1213
September1st to 15thNight
34%
720
12%
1800
5%
720
37%
720
25%
1276
September16th to endNight
37%
717
16%
1971
10%
717
40%
717
24%
1369
October1st to 15thNight
23%
720
13%
2160
7%
720
30%
720
14%
1621
October16th to endNight
20%
768
9%
2394
6%
768
25%
768
10%
1944
November1st to 15thNight
20%
760
12%
2608
8%
760
27%
760
10%
2036
November16th to endNight
15%
780
7%
2730
5%
780
19%
780
6%
2292
December1st to 15thNight
13%
736
4%
2574
2%
736
16%
736
5%
2220
December16th to endNight
13%
768
7%
2688
5%
768
16%
768
5%
2333

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
20%12%47%6%34446%25%
48936
Night
19%13%48%6%34445%25%
47729
TransparencyDay
59%410%16%7%
48621
Night
60%410%16%7%
47563
SeeingDay
27%12%30%18%8%2
5882
Night
26%11%29%22%8%
14840

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
21%19%7%12%6%2344413%
1432
16th to endDay
16%14%6%11%7%5%5%6%45%14%
1572
February1st to 15thDay
8%16%7%13%12%5%6%345%14%
1575
16th to endDay
15%21%7%9%7%3443420%
1476
March1st to 15thDay
16%16%5%8%6%25%335%25%
1873
16th to endDay
13%12%46%435%45%6%33%
2169
April1st to 15thDay
24%14%36%32333428%
2152
16th to endDay
22%11%345%23335%33%
2316
May1st to 15thDay
22%9%36%6%34446%28%
2511
16th to endDay
23%8%36%5%2335%5%31%
2618
June1st to 15thDay
22%9%36%6%36%5%5%7%24%
2532
16th to endDay
18%7%36%6%35%6%6%8%26%
2700
July1st to 15thDay
19%6%36%6%5%5%5%6%7%28%
2616
16th to endDay
17%8%36%6%35%45%8%30%
2654
August1st to 15thDay
19%8%37%7%45%5%5%6%25%
2442
16th to endDay
19%7%36%6%35%5%46%31%
2384
September1st to 15thDay
22%8%35%5%34345%34%
2160
16th to endDay
22%8%23324347%35%
1985
October1st to 15thDay
25%12%47%423346%25%
1800
16th to endDay
31%19%47%42323415%
1828
November1st to 15thDay
19%19%7%9%42323423%
1577
16th to endDay
24%18%8%11%8%3322314%
1560
December1st to 15thDay
21%22%9%10%7%244339%
1468
16th to endDay
21%19%10%10%9%35%4249%
1536
January1st to 15thNight
20%18%7%12%7%35%33411%
2506
16th to endNight
13%16%7%10%9%5%5%5%5%5%14%
2652
February1st to 15thNight
10%13%6%11%12%6%7%5%45%15%
2285
16th to endNight
15%17%6%10%9%3444419%
1997
March1st to 15thNight
18%16%5%7%5%35%445%22%
2061
16th to endNight
15%11%48%5%2443435%
2055
April1st to 15thNight
21%11%5%6%5%1323432%
1796
16th to endNight
20%10%25%5%24445%33%
1655
May1st to 15thNight
21%10%46%5%24336%32%
1440
16th to endNight
20%8%35%6%25%446%31%
1495
June1st to 15thNight
21%10%36%5%35%45%6%28%
1424
16th to endNight
17%5%35%4245%6%8%34%
1260
July1st to 15thNight
15%5%37%5%2345%8%38%
1341
16th to endNight
12%6%25%5%35%5%6%8%37%
1514
August1st to 15thNight
16%7%25%5%345%7%7%34%
1517
16th to endNight
14%6%26%42445%6%42%
1806
September1st to 15thNight
20%8%25%423446%37%
1800
16th to endNight
21%6%345%23446%38%
1971
October1st to 15thNight
24%11%45%42344429%
2160
16th to endNight
29%16%46%5%2333420%
2394
November1st to 15thNight
21%14%5%8%6%2433423%
2608
16th to endNight
26%19%5%9%5%2323316%
2730
December1st to 15thNight
23%20%5%10%7%345%4312%
2574
16th to endNight
21%18%8%12%8%3432311%
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
74%28%9%3
1433
16th to endDay
69%37%12%6%
1572
February1st to 15thDay
71%36%12%5%
1577
16th to endDay
68%25%15%7%
1476
March1st to 15thDay
61%37%16%8%1
1884
16th to endDay
50%49%18%13%3
2169
April1st to 15thDay
59%28%15%10%2
2152
16th to endDay
53%38%18%14%1
2316
May1st to 15thDay
57%37%18%10%1
2511
16th to endDay
53%5%9%17%12%
2622
June1st to 15thDay
57%5%10%16%8%
2532
16th to endDay
51%8%12%19%8%
2700
July1st to 15thDay
49%7%12%21%8%
2464
16th to endDay
53%6%12%20%7%
2487
August1st to 15thDay
57%6%13%17%4
2428
16th to endDay
51%6%13%20%7%
2384
September1st to 15thDay
51%5%13%19%10%
2160
16th to endDay
48%5%17%22%6%
1985
October1st to 15thDay
61%311%16%6%
1800
16th to endDay
74%48%9%2
1828
November1st to 15thDay
65%311%12%6%
1577
16th to endDay
76%37%7%4
1560
December1st to 15thDay
79%37%8%1
1468
16th to endDay
78%46%7%3
1536
January1st to 15thNight
76%37%8%2
2506
16th to endNight
68%5%6%12%6%
2652
February1st to 15thNight
68%5%7%12%5%
2287
16th to endNight
68%37%12%7%
1997
March1st to 15thNight
64%38%15%7%
2073
16th to endNight
52%47%20%13%1
2055
April1st to 15thNight
56%37%18%12%2
1796
16th to endNight
52%47%18%14%2
1655
May1st to 15thNight
55%37%17%14%2
1440
16th to endNight
52%6%10%19%10%
1497
June1st to 15thNight
55%6%10%18%8%
1424
16th to endNight
45%6%14%22%11%
1260
July1st to 15thNight
42%6%15%25%9%
1265
16th to endNight
43%6%17%25%7%
1418
August1st to 15thNight
45%7%18%23%4
1507
16th to endNight
41%6%18%27%6%
1806
September1st to 15thNight
46%417%21%8%
1800
16th to endNight
46%415%27%5%
1971
October1st to 15thNight
58%410%16%9%
2160
16th to endNight
67%410%13%3
2394
November1st to 15thNight
64%410%14%5%
2608
16th to endNight
72%48%9%3
2730
December1st to 15thNight
74%5%9%7%1
2574
16th to endNight
77%35%7%4
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
31%23%30%13%1
60
16th to endDay
31%15%31%12%8%
70
February1st to 15thDay
23%13%51%10%2
90
16th to endDay
37%14%34%8%3
135
March1st to 15thDay
27%17%30%17%6%1
270
16th to endDay
21%14%39%15%6%1
288
April1st to 15thDay
33%18%22%16%7%1
270
16th to endDay
26%16%28%17%7%3
270
May1st to 15thDay
32%10%29%16%7%3
288
16th to endDay
30%13%30%13%9%2
331
June1st to 15thDay
30%11%32%17%7%
327
16th to endDay
20%12%32%22%10%1
495
July1st to 15thDay
18%7%39%25%7%1
398
16th to endDay
21%7%29%26%13%2
326
August1st to 15thDay
23%7%28%24%11%5%
313
16th to endDay
25%8%28%20%10%6%
332
September1st to 15thDay
26%7%27%20%13%4
315
16th to endDay
23%9%25%26%9%5%
314
October1st to 15thDay
25%15%30%19%7%1
315
16th to endDay
38%12%25%17%4
313
November1st to 15thDay
26%19%31%16%5%
141
16th to endDay
44%20%24%7%21
90
December1st to 15thDay
35%14%37%8%11
67
16th to endDay
35%21%39%11
64
January1st to 15thNight
31%14%29%20%3
720
16th to endNight
22%12%34%21%8%
768
February1st to 15thNight
17%14%36%23%6%
704
16th to endNight
24%13%34%21%5%
631
March1st to 15thNight
28%18%27%20%4
720
16th to endNight
21%13%33%20%9%1
768
April1st to 15thNight
27%14%28%22%5%
718
16th to endNight
26%11%31%23%7%
575
May1st to 15thNight
27%6%28%25%11%
360
16th to endNight
23%9%32%24%10%
375
June1st to 15thNight
28%6%29%24%10%
360
16th to endNight
17%7%31%29%12%
360
July1st to 15thNight
17%433%31%11%1
340
16th to endNight
14%5%27%38%13%
376
August1st to 15thNight
19%5%23%28%21%1
436
16th to endNight
16%6%29%27%17%2
660
September1st to 15thNight
24%5%30%21%15%1
720
16th to endNight
23%7%28%25%12%2
717
October1st to 15thNight
30%10%29%19%8%
720
16th to endNight
39%10%26%17%5%
768
November1st to 15thNight
31%13%29%17%6%
760
16th to endNight
38%15%24%16%5%
780
December1st to 15thNight
34%16%27%16%4
736
16th to endNight
33%15%27%17%41
768
Page generated at 2017-12-05 10:18:58. Version ac04

Copyright 2017 A. Danko


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