Miramichi City (Newcastle)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Miramichi City (Newcastle) clear sky chart from 2005-11-05 to 2017-12-02.

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
22%
15093
13%
47719
5%
15054
32%
15054
16%
33750

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%
750
12%
2685
2%
746
25%
746
11%
1883
January16th to endNight
19%
773
18%
2627
4%
773
35%
773
16%
1732
February1st to 15thNight
18%
704
12%
2286
3%
701
30%
701
15%
1620
February16th to endNight
16%
631
11%
2021
2%
631
27%
631
11%
1537
March1st to 15thNight
18%
720
16%
2021
5%
720
28%
720
15%
1495
March16th to endNight
19%
768
18%
2112
5%
768
30%
768
18%
1523
April1st to 15thNight
19%
574
13%
1760
6%
574
26%
574
14%
1300
April16th to endNight
21%
540
15%
1620
7%
540
28%
540
17%
1153
May1st to 15thNight
25%
540
10%
1530
6%
540
30%
540
16%
1135
May16th to endNight
22%
510
10%
1445
2%
509
29%
509
15%
1084
June1st to 15thNight
31%
360
7%
1260
5%
360
34%
360
14%
906
June16th to endNight
29%
360
5%
1260
2%
360
33%
360
13%
932
July1st to 15thNight
34%
340
10%
1190
6%
340
40%
340
20%
787
July16th to endNight
36%
447
8%
1351
6%
420
39%
420
18%
953
August1st to 15thNight
36%
539
9%
1608
5%
535
40%
535
19%
1151
August16th to endNight
36%
573
15%
1725
7%
573
42%
573
24%
1125
September1st to 15thNight
28%
576
16%
1836
7%
576
38%
576
23%
1159
September16th to endNight
30%
717
22%
1983
11%
717
40%
717
29%
1245
October1st to 15thNight
29%
720
20%
2160
8%
720
39%
720
24%
1397
October16th to endNight
21%
768
15%
2367
5%
768
31%
768
16%
1674
November1st to 15thNight
21%
799
14%
2639
7%
799
30%
799
14%
1880
November16th to endNight
21%
825
13%
2730
5%
825
30%
825
12%
1998
December1st to 15thNight
13%
759
12%
2623
2%
759
24%
759
12%
1909
December16th to endNight
12%
800
11%
2880
3%
800
23%
800
9%
2172

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%8%36%5%34446%32%
48737
Night
19%8%35%5%34445%34%
47879
TransparencyDay
52%5%12%18%9%1
48416
Night
51%5%11%20%9%
47719
SeeingDay
26%14%30%19%7%1
7210
Night
24%13%33%21%6%
15093

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
16%12%35%6%3445%5%32%
1253
16th to endDay
14%9%46%5%34445%35%
1593
February1st to 15thDay
11%10%39%6%35%5%5%6%32%
1575
16th to endDay
16%14%5%8%6%35%435%26%
1449
March1st to 15thDay
19%12%45%5%24335%31%
1927
16th to endDay
17%11%47%424335%34%
2112
April1st to 15thDay
21%10%47%5%34345%30%
2185
16th to endDay
27%8%24423235%34%
2340
May1st to 15thDay
27%8%36%5%23335%30%
2422
16th to endDay
25%8%46%42445%6%26%
2678
June1st to 15thDay
27%8%35%5%2445%6%27%
2700
16th to endDay
27%6%26%6%3445%5%26%
2700
July1st to 15thDay
16%6%36%5%35%5%6%8%30%
2700
16th to endDay
19%6%36%6%46%5%6%7%27%
2708
August1st to 15thDay
18%6%35%6%45%6%6%6%30%
2340
16th to endDay
15%6%26%5%335%6%7%36%
2477
September1st to 15thDay
18%6%36%424446%37%
2123
16th to endDay
18%5%2342334446%
1976
October1st to 15thDay
16%7%25%5%24346%40%
1800
16th to endDay
26%7%25%313325%35%
1855
November1st to 15thDay
22%9%35%5%35%45%5%30%
1549
16th to endDay
19%10%36%5%3345%7%31%
1560
December1st to 15thDay
23%11%35%424345%31%
1371
16th to endDay
21%14%5%6%42333429%
1344
January1st to 15thNight
15%10%47%6%3445%6%31%
2685
16th to endNight
15%9%36%5%2445%6%36%
2627
February1st to 15thNight
13%12%45%5%35%5%5%5%33%
2285
16th to endNight
18%14%46%6%4434427%
2021
March1st to 15thNight
20%10%35%5%35%44432%
2009
16th to endNight
16%9%48%42433437%
2112
April1st to 15thNight
24%8%26%5%24445%29%
1760
16th to endNight
26%9%34323335%34%
1620
May1st to 15thNight
23%8%36%6%2335%6%30%
1530
16th to endNight
20%7%36%6%35%45%6%28%
1443
June1st to 15thNight
26%7%35%5%3444431%
1260
16th to endNight
23%6%35%5%35%5%46%29%
1260
July1st to 15thNight
12%7%35%5%25%5%5%8%37%
1260
16th to endNight
17%6%36%5%36%5%6%7%31%
1444
August1st to 15thNight
17%5%35%6%35%5%5%6%34%
1620
16th to endNight
13%6%25%4345%5%7%40%
1725
September1st to 15thNight
16%6%35%422336%45%
1836
16th to endNight
15%5%14422345%50%
1983
October1st to 15thNight
18%5%24423346%42%
2160
16th to endNight
23%7%35%424235%35%
2367
November1st to 15thNight
23%8%44434345%33%
2639
16th to endNight
21%8%36%6%34445%31%
2730
December1st to 15thNight
22%9%46%5%2443431%
2623
16th to endNight
23%11%47%6%2434426%
2880

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
51%6%14%16%10%
1254
16th to endDay
48%410%19%15%
1593
February1st to 15thDay
51%6%11%20%8%1
1578
16th to endDay
60%47%17%8%
1449
March1st to 15thDay
56%49%17%10%1
1938
16th to endDay
54%38%19%11%2
2112
April1st to 15thDay
56%47%15%12%3
2185
16th to endDay
54%38%16%13%3
2340
May1st to 15thDay
58%47%18%10%
2422
16th to endDay
57%6%10%18%6%
2682
June1st to 15thDay
57%6%11%14%8%1
2700
16th to endDay
57%6%12%15%8%
2700
July1st to 15thDay
46%7%16%20%8%
2541
16th to endDay
52%7%16%16%6%
2540
August1st to 15thDay
51%6%13%21%6%
2327
16th to endDay
44%7%17%22%7%
2477
September1st to 15thDay
46%6%13%22%11%
2123
16th to endDay
41%5%10%26%15%1
1976
October1st to 15thDay
44%5%13%26%8%1
1800
16th to endDay
52%412%20%9%
1855
November1st to 15thDay
53%5%14%15%10%
1549
16th to endDay
53%5%15%16%8%
1560
December1st to 15thDay
57%415%16%6%
1371
16th to endDay
59%49%16%8%
1344
January1st to 15thNight
52%5%13%17%9%
2685
16th to endNight
48%312%23%12%
2627
February1st to 15thNight
51%5%13%18%10%
2286
16th to endNight
61%48%14%10%1
2021
March1st to 15thNight
54%5%8%18%11%1
2021
16th to endNight
51%37%19%14%2
2112
April1st to 15thNight
56%48%15%11%3
1760
16th to endNight
52%49%15%15%2
1620
May1st to 15thNight
54%5%10%19%8%1
1530
16th to endNight
54%7%13%16%7%
1445
June1st to 15thNight
55%5%11%18%7%1
1260
16th to endNight
54%8%12%16%7%
1260
July1st to 15thNight
43%8%14%26%7%
1190
16th to endNight
49%8%16%17%8%
1351
August1st to 15thNight
48%9%14%22%5%
1608
16th to endNight
39%8%18%25%7%
1725
September1st to 15thNight
41%5%12%27%12%
1836
16th to endNight
36%5%13%29%13%1
1983
October1st to 15thNight
42%412%29%10%
2160
16th to endNight
51%411%22%9%
2367
November1st to 15thNight
53%5%13%18%9%
2639
16th to endNight
54%7%13%17%7%
2730
December1st to 15thNight
56%5%12%20%6%
2623
16th to endNight
60%5%8%16%8%
2880

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
30%18%40%11%
60
16th to endDay
18%17%37%18%7%
151
February1st to 15thDay
18%14%34%24%7%
236
16th to endDay
23%15%30%23%5%1
217
March1st to 15thDay
30%19%27%17%41
270
16th to endDay
27%18%27%17%7%2
288
April1st to 15thDay
30%19%28%15%41
270
16th to endDay
31%17%27%16%6%1
270
May1st to 15thDay
39%15%21%14%6%2
378
16th to endDay
31%15%29%15%6%
519
June1st to 15thDay
33%13%26%18%6%
495
16th to endDay
29%10%31%20%7%
495
July1st to 15thDay
19%9%38%20%10%1
475
16th to endDay
20%7%33%27%9%
463
August1st to 15thDay
16%9%36%23%10%2
313
16th to endDay
18%10%31%25%12%1
332
September1st to 15thDay
20%12%36%20%8%1
315
16th to endDay
20%12%32%24%6%3
312
October1st to 15thDay
21%16%27%20%10%4
270
16th to endDay
34%18%25%12%7%1
288
November1st to 15thDay
28%17%26%17%7%2
280
16th to endDay
27%16%32%17%41
285
December1st to 15thDay
33%15%30%16%4
164
16th to endDay
34%18%43%3
64
January1st to 15thNight
22%20%36%17%4
750
16th to endNight
21%16%36%20%4
773
February1st to 15thNight
21%15%38%19%5%
704
16th to endNight
28%14%32%19%5%
631
March1st to 15thNight
26%16%35%18%3
720
16th to endNight
21%17%35%18%6%
768
April1st to 15thNight
30%13%32%19%4
574
16th to endNight
32%12%30%18%5%
540
May1st to 15thNight
28%13%28%22%6%
540
16th to endNight
24%13%35%20%5%
510
June1st to 15thNight
29%7%25%30%7%
360
16th to endNight
27%8%28%24%11%
360
July1st to 15thNight
15%6%38%29%10%
340
16th to endNight
20%6%32%30%10%
447
August1st to 15thNight
18%6%30%32%10%
539
16th to endNight
16%8%32%28%11%1
573
September1st to 15thNight
21%8%36%25%7%
576
16th to endNight
18%10%37%23%9%
717
October1st to 15thNight
21%11%35%21%9%
720
16th to endNight
27%17%29%19%5%
768
November1st to 15thNight
27%14%32%18%6%1
799
16th to endNight
26%17%27%20%7%
825
December1st to 15thNight
29%16%36%14%3
759
16th to endNight
32%16%30%15%21
800
Page generated at 2017-12-03 12:16:47. Version ac04

Copyright 2017 A. Danko


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