Morganton
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Morganton clear sky chart from 2005-11-05 to 2017-09-18.

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%
15698
21%
46921
15%
15659
57%
15659
27%
29730

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
33%
718
24%
2327
12%
716
49%
716
25%
1371
January16th to endNight
33%
768
24%
2496
12%
768
49%
768
27%
1492
February1st to 15thNight
34%
700
24%
2223
13%
700
48%
700
29%
1303
February16th to endNight
28%
631
26%
1893
12%
631
42%
631
27%
1158
March1st to 15thNight
38%
720
26%
1980
14%
720
48%
720
29%
1242
March16th to endNight
37%
768
18%
2112
10%
768
44%
768
26%
1416
April1st to 15thNight
43%
718
22%
1940
11%
718
51%
718
34%
1173
April16th to endNight
48%
585
22%
1665
12%
585
55%
585
30%
1058
May1st to 15thNight
46%
540
15%
1620
8%
540
50%
540
23%
1106
May16th to endNight
63%
562
16%
1684
12%
561
64%
561
26%
1105
June1st to 15thNight
66%
540
12%
1620
12%
540
67%
540
24%
1098
June16th to endNight
70%
540
15%
1620
13%
540
70%
540
29%
1037
July1st to 15thNight
70%
510
10%
1530
10%
510
70%
510
25%
1049
July16th to endNight
73%
564
13%
1595
11%
531
75%
531
26%
1075
August1st to 15thNight
64%
539
13%
1609
12%
536
64%
536
22%
1139
August16th to endNight
66%
634
18%
1798
15%
634
67%
634
25%
1242
September1st to 15thNight
63%
720
18%
1980
16%
720
63%
720
26%
1357
September16th to endNight
55%
669
18%
1848
16%
669
57%
669
23%
1300
October1st to 15thNight
55%
660
29%
1917
26%
660
61%
660
34%
1161
October16th to endNight
53%
704
32%
2112
26%
704
65%
704
37%
1194
November1st to 15thNight
53%
700
28%
2176
22%
700
62%
700
36%
1217
November16th to endNight
48%
720
27%
2340
21%
720
58%
720
29%
1356
December1st to 15thNight
44%
720
24%
2340
17%
720
53%
720
25%
1434
December16th to endNight
35%
768
22%
2496
14%
768
46%
768
20%
1647

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%5%24435%5%5%8%42%
47871
Night
13%42442445%7%45%
47118
TransparencyDay
38%8%13%19%16%3
47572
Night
37%7%11%20%18%4
46921
SeeingDay
16%5%17%25%21%14%
5547
Night
15%5%21%31%21%3
15705

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
14%5%244335%45%47%
1611
16th to endDay
14%42332335%6%50%
1728
February1st to 15thDay
13%5%2432345%8%45%
1638
16th to endDay
13%323424447%48%
1580
March1st to 15thDay
15%414323446%47%
1979
16th to endDay
17%5%24424445%42%
2111
April1st to 15thDay
11%2233235%6%8%49%
2008
16th to endDay
14%5%234345%5%6%43%
2304
May1st to 15thDay
13%5%35%435%5%6%8%38%
2331
16th to endDay
11%425%5%35%5%6%10%40%
2431
June1st to 15thDay
8%4346%48%6%7%10%34%
2340
16th to endDay
6%4246%46%6%8%11%38%
2340
July1st to 15thDay
10%5%26%6%47%6%7%10%31%
2340
16th to endDay
8%425%6%48%8%8%11%30%
2465
August1st to 15thDay
13%6%36%6%46%8%7%9%27%
2340
16th to endDay
10%5%37%7%46%6%7%10%30%
2387
September1st to 15thDay
12%5%26%5%345%5%8%38%
1980
16th to endDay
19%7%15%435%446%37%
1837
October1st to 15thDay
16%413311235%55%
1713
16th to endDay
12%41431323358%
1760
November1st to 15thDay
10%413312346%57%
1680
16th to endDay
15%424313346%50%
1620
December1st to 15thDay
13%6%25%42445%5%46%
1620
16th to endDay
18%6%33423345%43%
1728
January1st to 15thNight
15%313324446%49%
2327
16th to endNight
14%5%2332445%6%46%
2496
February1st to 15thNight
12%5%1432335%6%50%
2214
16th to endNight
12%5%24424446%47%
1893
March1st to 15thNight
13%42442345%7%47%
1980
16th to endNight
16%5%25%424446%42%
2112
April1st to 15thNight
11%42432436%7%51%
1940
16th to endNight
13%424424347%48%
1665
May1st to 15thNight
15%5%35%445%45%6%39%
1619
16th to endNight
10%5%25%5%35%5%5%9%41%
1682
June1st to 15thNight
8%425%5%37%5%8%11%35%
1620
16th to endNight
7%3147%36%6%7%10%40%
1620
July1st to 15thNight
7%5%35%6%35%7%9%10%34%
1620
16th to endNight
5%5%25%6%45%7%8%12%35%
1703
August1st to 15thNight
12%6%36%5%436%8%8%35%
1620
16th to endNight
10%5%25%6%36%6%6%11%35%
1798
September1st to 15thNight
12%5%26%6%35%46%8%40%
1980
16th to endNight
19%6%245%34446%39%
1848
October1st to 15thNight
16%41331234453%
1917
16th to endNight
12%32332333458%
2112
November1st to 15thNight
11%413312335%57%
2176
16th to endNight
14%32332445%5%51%
2340
December1st to 15thNight
15%5%25%423445%46%
2340
16th to endNight
19%6%24434445%39%
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
38%6%8%20%21%4
1612
16th to endDay
34%39%25%19%7%
1728
February1st to 15thDay
35%5%10%21%21%4
1640
16th to endDay
34%6%11%25%16%4
1580
March1st to 15thDay
36%48%23%20%5%
1979
16th to endDay
42%6%12%18%15%3
2112
April1st to 15thDay
30%6%12%26%20%4
2008
16th to endDay
40%7%10%18%16%6%
2304
May1st to 15thDay
41%9%15%19%12%1
2331
16th to endDay
38%9%16%21%11%2
2435
June1st to 15thDay
41%12%18%19%8%
2340
16th to endDay
35%13%17%17%15%1
2340
July1st to 15thDay
43%12%15%15%9%3
2201
16th to endDay
39%13%21%15%8%1
2310
August1st to 15thDay
46%13%16%14%7%1
2327
16th to endDay
44%11%16%19%7%1
2387
September1st to 15thDay
42%9%12%19%13%3
1980
16th to endDay
47%6%10%13%19%2
1837
October1st to 15thDay
32%411%21%24%5%
1713
16th to endDay
31%37%22%26%9%
1760
November1st to 15thDay
28%39%18%31%8%
1680
16th to endDay
35%48%23%22%5%
1620
December1st to 15thDay
38%7%9%20%18%5%
1620
16th to endDay
42%5%10%18%17%5%
1728
January1st to 15thNight
35%5%10%17%24%6%
2327
16th to endNight
36%5%8%22%22%5%
2496
February1st to 15thNight
34%49%22%23%5%
2223
16th to endNight
36%5%10%24%20%3
1893
March1st to 15thNight
36%5%8%22%19%6%
1980
16th to endNight
43%5%10%22%15%3
2112
April1st to 15thNight
32%5%11%25%20%4
1940
16th to endNight
36%6%11%18%18%7%
1665
May1st to 15thNight
44%7%12%20%14%1
1620
16th to endNight
37%10%15%23%11%2
1684
June1st to 15thNight
39%11%19%21%7%
1620
16th to endNight
34%10%19%19%12%3
1620
July1st to 15thNight
38%13%17%18%9%2
1530
16th to endNight
35%13%21%19%7%2
1595
August1st to 15thNight
42%12%17%16%10%1
1609
16th to endNight
40%10%16%21%8%1
1798
September1st to 15thNight
40%9%13%18%13%3
1980
16th to endNight
45%7%10%14%18%3
1848
October1st to 15thNight
34%5%10%23%21%5%
1917
16th to endNight
30%36%22%26%9%
2112
November1st to 15thNight
30%47%18%28%11%
2176
16th to endNight
33%5%7%22%24%6%
2340
December1st to 15thNight
38%5%10%18%20%6%
2340
16th to endNight
45%5%10%16%18%3
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
22%18%26%26%41
90
16th to endDay
18%25%39%13%3
96
February1st to 15thDay
21%12%50%15%1
90
16th to endDay
22%17%41%14%3
81
March1st to 15thDay
20%9%29%32%7%1
269
16th to endDay
19%7%29%31%10%1
288
April1st to 15thDay
15%10%21%27%21%4
270
16th to endDay
19%320%27%18%10%
270
May1st to 15thDay
15%10%22%26%15%9%
288
16th to endDay
15%29%28%24%19%
331
June1st to 15thDay
9%39%26%31%18%
315
16th to endDay
9%112%26%29%20%
315
July1st to 15thDay
9%111%24%25%28%
305
16th to endDay
6%16%20%30%34%
326
August1st to 15thDay
20%17%24%20%25%
313
16th to endDay
12%7%16%31%31%
332
September1st to 15thDay
16%310%17%28%23%
315
16th to endDay
25%112%20%24%14%
262
October1st to 15thDay
21%214%27%22%11%
255
16th to endDay
15%5%14%34%22%7%
272
November1st to 15thDay
20%423%27%16%6%
188
16th to endDay
17%12%21%25%22%1
90
December1st to 15thDay
18%11%30%28%10%1
90
16th to endDay
34%10%33%17%4
96
January1st to 15thNight
18%12%31%29%8%
720
16th to endNight
16%9%35%35%2
768
February1st to 15thNight
16%9%34%36%3
704
16th to endNight
14%13%38%28%4
631
March1st to 15thNight
15%8%32%37%6%
720
16th to endNight
19%7%28%33%11%
768
April1st to 15thNight
15%10%27%31%14%
718
16th to endNight
16%5%23%34%20%
585
May1st to 15thNight
17%322%35%18%
540
16th to endNight
12%112%31%34%7%
563
June1st to 15thNight
10%111%30%37%9%
540
16th to endNight
8%17%30%41%10%
540
July1st to 15thNight
11%5%25%48%8%
510
16th to endNight
5%5%26%46%14%
564
August1st to 15thNight
14%5%28%43%7%
539
16th to endNight
11%15%23%45%11%
634
September1st to 15thNight
13%110%24%40%9%
720
16th to endNight
24%10%29%30%5%
669
October1st to 15thNight
18%319%27%25%5%
660
16th to endNight
14%421%36%20%2
704
November1st to 15thNight
13%423%37%17%4
700
16th to endNight
16%8%22%34%16%
720
December1st to 15thNight
18%7%23%38%11%
720
16th to endNight
23%9%26%34%5%
768
Page generated at 2017-09-19 07:32:32. Version ac04

Copyright 2017 A. Danko


Morganton Clear Sky Chart | Charts Home