Tupelo
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Tupelo clear sky chart from 2005-11-06 to 2024-01-14.

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
51%
23836
24%
74419
18%
23781
57%
23781
30%
45039

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 10thNight
29%
950
23%
2631
10%
946
40%
946
28%
1709
January11th to 20thNight
29%
920
23%
2392
10%
920
37%
920
24%
1689
January21st to endNight
29%
863
28%
2447
12%
863
41%
863
29%
1552
February1st to 10thNight
29%
720
22%
2160
11%
720
39%
720
24%
1419
February11th to 20thNight
27%
703
20%
2098
10%
699
36%
699
23%
1384
February21st to endNight
23%
592
22%
1776
8%
592
34%
592
21%
1218
March1st to 10thNight
35%
720
22%
2160
12%
720
43%
720
27%
1367
March11th to 20thNight
33%
644
19%
2084
13%
644
40%
644
22%
1363
March21st to endNight
36%
594
23%
1985
15%
594
46%
594
25%
1229
April1st to 10thNight
42%
540
27%
1800
18%
540
54%
540
31%
1039
April11th to 20thNight
45%
533
28%
1775
23%
533
55%
533
32%
1000
April21st to endNight
46%
540
25%
1800
21%
540
55%
540
30%
1036
May1st to 10thNight
53%
540
22%
1782
20%
540
60%
540
32%
1019
May11th to 20thNight
56%
531
21%
1592
17%
531
60%
531
31%
974
May21st to endNight
71%
582
22%
1744
20%
582
73%
582
33%
1055
June1st to 10thNight
68%
540
22%
1513
19%
540
69%
540
33%
942
June11th to 20thNight
80%
540
26%
1440
23%
540
82%
540
47%
807
June21st to endNight
77%
540
24%
1440
21%
540
79%
540
45%
821
July1st to 10thNight
76%
525
19%
1400
17%
525
76%
525
36%
884
July11th to 20thNight
78%
522
22%
1410
21%
522
79%
522
39%
846
July21st to endNight
78%
591
18%
1809
21%
558
78%
558
33%
1047
August1st to 10thNight
82%
537
20%
1778
24%
534
83%
534
37%
964
August11th to 20thNight
76%
534
18%
1776
21%
534
77%
534
27%
1083
August21st to endNight
73%
594
21%
1980
25%
594
73%
594
29%
1209
September1st to 10thNight
75%
540
26%
1800
28%
540
75%
540
32%
1020
September11th to 20thNight
67%
639
25%
1899
24%
639
68%
639
32%
1160
September21st to endNight
69%
720
33%
1980
25%
720
72%
720
42%
1125
October1st to 10thNight
70%
720
34%
1980
29%
720
73%
720
48%
1076
October11th to 20thNight
56%
720
31%
2143
23%
720
64%
720
37%
1225
October21st to endNight
51%
792
31%
2394
26%
792
57%
792
32%
1436
November1st to 10thNight
57%
740
29%
2406
27%
740
63%
740
37%
1297
November11th to 20thNight
45%
760
29%
2470
22%
760
57%
760
34%
1368
November21st to endNight
42%
760
25%
2470
20%
760
51%
760
29%
1454
December1st to 10thNight
35%
760
25%
2470
16%
760
46%
760
23%
1594
December11th to 20thNight
35%
758
25%
2902
16%
758
46%
758
23%
1714
December21st to endNight
30%
1032
13%
4733
10%
1021
39%
1021
15%
2914

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
12%6%25%5%35%5%6%7%44%
74852
Night
12%5%25%43445%7%47%
74898
TransparencyDay
39%6%11%21%19%5%
74575
Night
36%5%10%21%21%6%
74697
SeeingDay
14%7%19%24%23%13%
13999
Night
15%6%23%31%22%4
23848

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 10thDay
21%8%25%323335%45%
1531
11th to 20thDay
21%7%35%5%34445%38%
1647
21st to endDay
16%6%24434445%48%
1905
February1st to 10thDay
19%8%345%23447%40%
1800
11th to 20thDay
21%7%36%5%34445%39%
1748
21st to endDay
22%8%35%43335%5%40%
1480
March1st to 10thDay
17%7%38%5%3445%5%42%
1800
11th to 20thDay
15%7%35%6%45%5%5%7%37%
1890
21st to endDay
14%6%36%5%35%5%5%7%39%
2369
April1st to 10thDay
12%434435%5%6%7%46%
2160
11th to 20thDay
16%7%24424446%47%
2134
21st to endDay
11%5%25%5%345%5%8%46%
2160
May1st to 10thDay
14%5%25%425%45%6%47%
2173
11th to 20thDay
9%6%36%6%35%5%6%8%44%
2301
21st to endDay
9%5%35%6%45%6%7%10%41%
2531
June1st to 10thDay
8%6%36%5%45%5%7%9%42%
2440
11th to 20thDay
4325%5%36%7%7%9%48%
2520
21st to endDay
6%325%7%45%5%6%9%49%
2520
July1st to 10thDay
8%6%36%7%5%8%7%8%10%33%
2520
11th to 20thDay
9%5%25%5%38%7%8%11%37%
2498
21st to endDay
5%5%36%7%47%7%9%11%36%
2401
August1st to 10thDay
5%426%6%5%6%7%9%11%39%
2148
11th to 20thDay
9%5%37%6%46%6%7%9%38%
2125
21st to endDay
11%6%25%5%346%7%9%41%
2376
September1st to 10thDay
8%425%6%46%5%6%7%46%
2160
11th to 20thDay
12%5%26%5%45%45%7%45%
2041
21st to endDay
11%4135%24447%55%
1980
October1st to 10thDay
10%42442345%6%57%
1980
11th to 20thDay
9%5%245%3445%6%55%
1814
21st to endDay
15%5%24433435%52%
1962
November1st to 10thDay
11%5%14323346%59%
1672
11th to 20thDay
12%5%24434435%54%
1710
21st to endDay
16%6%25%5%34347%45%
1710
December1st to 10thDay
20%8%35%5%4445%437%
1710
11th to 20thDay
15%8%35%6%34445%43%
2153
21st to endDay
14%9%36%6%35%45%6%38%
2783
January1st to 10thNight
19%6%24433346%45%
2631
11th to 20thNight
19%9%36%5%2345%440%
2392
21st to endNight
17%6%345%24346%46%
2447
February1st to 10thNight
18%7%36%433345%43%
2160
11th to 20thNight
20%6%35%5%23445%44%
2098
21st to endNight
23%6%36%5%33446%38%
1776
March1st to 10thNight
16%6%2443445%7%45%
2160
11th to 20thNight
16%6%36%5%3445%7%40%
2084
21st to endNight
16%7%35%424447%44%
1985
April1st to 10thNight
12%5%25%42445%9%47%
1800
11th to 20thNight
13%5%245%3345%7%50%
1775
21st to endNight
11%5%25%5%3445%7%50%
1800
May1st to 10thNight
11%5%25%42445%8%52%
1782
11th to 20thNight
9%6%25%5%36%45%9%47%
1592
21st to endNight
6%325%5%46%6%6%11%46%
1744
June1st to 10thNight
7%426%6%36%5%5%10%47%
1513
11th to 20thNight
4323325%6%7%11%56%
1440
21st to endNight
442443446%11%55%
1440
July1st to 10thNight
5%5%35%5%446%7%12%45%
1440
11th to 20thNight
7%3234346%7%12%49%
1458
21st to endNight
4325%435%6%8%14%45%
1915
August1st to 10thNight
33146%35%6%8%13%48%
1790
11th to 20thNight
6%425%6%45%6%8%12%42%
1776
21st to endNight
8%5%35%5%346%5%10%45%
1980
September1st to 10thNight
9%5%245%445%6%7%50%
1800
11th to 20thNight
11%425%5%25%46%8%48%
1899
21st to endNight
8%5%2432345%8%56%
1980
October1st to 10thNight
7%214323337%64%
1980
11th to 20thNight
11%5%2443335%6%55%
2143
21st to endNight
16%5%25%423335%53%
2394
November1st to 10thNight
11%424323346%57%
2406
11th to 20thNight
11%5%25%42445%7%53%
2470
21st to endNight
16%5%34423345%50%
2470
December1st to 10thNight
18%7%35%5%24445%43%
2470
11th to 20thNight
15%6%26%434335%49%
3042
21st to endNight
17%7%35%5%45%6%6%7%36%
4866

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 10thDay
44%37%20%21%5%
1532
11th to 20thDay
49%47%19%18%3
1647
21st to endDay
39%46%24%24%4
1905
February1st to 10thDay
46%47%20%18%5%
1800
11th to 20thDay
49%45%19%18%5%
1758
21st to endDay
48%47%15%20%7%
1480
March1st to 10thDay
44%5%6%16%18%11%
1800
11th to 20thDay
46%7%9%16%18%4
1890
21st to endDay
45%5%10%22%17%1
2369
April1st to 10thDay
37%6%9%23%19%6%
2160
11th to 20thDay
39%5%7%21%22%7%
2134
21st to endDay
36%5%9%26%23%2
2160
May1st to 10thDay
39%6%8%24%19%4
2173
11th to 20thDay
37%9%14%23%15%2
2305
21st to endDay
38%9%13%26%13%2
2531
June1st to 10thDay
38%7%12%22%19%2
2440
11th to 20thDay
30%8%14%26%19%3
2520
21st to endDay
33%8%15%23%18%4
2520
July1st to 10thDay
41%12%16%17%12%3
2451
11th to 20thDay
37%10%21%21%10%2
2423
21st to endDay
38%10%18%24%10%1
2268
August1st to 10thDay
34%11%19%26%10%1
2136
11th to 20thDay
41%9%14%20%14%2
2125
21st to endDay
38%9%15%22%12%4
2376
September1st to 10thDay
35%8%12%22%18%5%
2160
11th to 20thDay
39%6%13%14%23%6%
2041
21st to endDay
29%5%11%24%22%9%
1980
October1st to 10thDay
29%5%8%24%24%10%
1980
11th to 20thDay
30%48%22%27%9%
1814
21st to endDay
37%35%19%28%8%
1962
November1st to 10thDay
29%48%20%30%10%
1672
11th to 20thDay
34%36%19%27%9%
1710
21st to endDay
41%37%19%24%5%
1710
December1st to 10thDay
50%45%17%17%5%
1710
11th to 20thDay
45%36%20%21%5%
2150
21st to endDay
45%411%21%17%2
2783
January1st to 10thNight
42%37%20%23%4
2631
11th to 20thNight
48%47%19%18%4
2392
21st to endNight
41%37%21%23%5%
2447
February1st to 10thNight
45%38%19%20%5%
2160
11th to 20thNight
45%46%19%20%6%
2099
21st to endNight
49%46%16%18%8%
1776
March1st to 10thNight
40%49%15%20%12%
2160
11th to 20thNight
45%5%9%18%18%5%
2084
21st to endNight
41%49%21%20%4
1985
April1st to 10thNight
35%411%24%20%7%
1800
11th to 20thNight
34%37%22%25%8%
1775
21st to endNight
34%6%10%24%22%4
1800
May1st to 10thNight
33%5%10%25%23%4
1782
11th to 20thNight
35%7%15%22%18%4
1593
21st to endNight
30%10%13%27%18%2
1745
June1st to 10thNight
34%7%12%24%21%3
1513
11th to 20thNight
22%8%16%28%23%4
1440
21st to endNight
24%7%18%24%23%5%
1440
July1st to 10thNight
29%11%19%25%13%4
1400
11th to 20thNight
27%9%20%27%14%3
1410
21st to endNight
28%11%21%26%13%1
1809
August1st to 10thNight
24%10%22%29%15%
1778
11th to 20thNight
32%12%18%21%13%4
1776
21st to endNight
34%9%17%22%12%6%
1980
September1st to 10thNight
31%7%13%22%21%6%
1800
11th to 20thNight
35%6%12%16%24%7%
1899
21st to endNight
27%5%10%24%26%9%
1980
October1st to 10thNight
23%5%9%24%26%13%
1980
11th to 20thNight
32%48%18%27%11%
2143
21st to endNight
37%35%17%29%9%
2394
November1st to 10thNight
30%48%21%26%11%
2406
11th to 20thNight
32%37%19%28%10%
2470
21st to endNight
37%38%20%24%8%
2470
December1st to 10thNight
44%47%20%21%4
2470
11th to 20thNight
39%36%20%26%5%
3044
21st to endNight
46%411%19%15%5%
4866

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 10thDay
23%21%32%18%7%
270
11th to 20thDay
25%17%35%15%5%3
249
21st to endDay
18%19%41%19%4
264
February1st to 10thDay
20%18%35%18%8%1
240
11th to 20thDay
34%16%36%12%2
240
21st to endDay
34%15%35%13%3
198
March1st to 10thDay
24%17%31%21%7%1
240
11th to 20thDay
18%20%35%23%31
240
21st to endDay
19%14%33%25%9%1
455
April1st to 10thDay
16%15%28%27%13%1
420
11th to 20thDay
19%12%26%26%13%3
412
21st to endDay
16%13%22%30%16%3
420
May1st to 10thDay
16%9%22%29%19%4
423
11th to 20thDay
10%423%28%21%14%
447
21st to endDay
11%316%27%28%16%
485
June1st to 10thDay
11%312%27%29%17%
550
11th to 20thDay
6%310%26%36%19%
630
21st to endDay
9%211%27%32%19%
630
July1st to 10thDay
8%28%25%34%24%
621
11th to 20thDay
8%26%21%32%31%
618
21st to endDay
6%16%21%36%30%
539
August1st to 10thDay
7%26%18%41%26%
446
11th to 20thDay
10%27%26%36%20%
439
21st to endDay
13%29%17%30%29%
495
September1st to 10thDay
10%26%21%42%19%
450
11th to 20thDay
10%211%22%33%22%
450
21st to endDay
12%110%28%33%15%
450
October1st to 10thDay
9%218%28%31%13%
450
11th to 20thDay
10%7%29%33%17%3
284
21st to endDay
21%8%24%28%14%4
297
November1st to 10thDay
15%8%24%30%20%4
270
11th to 20thDay
13%10%36%30%10%1
270
21st to endDay
17%17%27%22%14%4
270
December1st to 10thDay
25%15%30%20%9%
270
11th to 20thDay
18%15%33%22%10%2
270
21st to endDay
23%16%34%22%41
297
January1st to 10thNight
22%11%34%27%6%
950
11th to 20thNight
25%10%32%25%8%
920
21st to endNight
21%9%38%29%4
863
February1st to 10thNight
23%9%33%31%4
720
11th to 20thNight
24%12%32%29%3
703
21st to endNight
26%10%38%23%2
592
March1st to 10thNight
18%11%32%33%6%
720
11th to 20thNight
20%8%35%30%7%
644
21st to endNight
19%8%32%29%12%
594
April1st to 10thNight
15%8%31%32%13%
540
11th to 20thNight
14%6%29%36%14%1
533
21st to endNight
14%431%35%14%1
540
May1st to 10thNight
13%425%36%20%2
540
11th to 20thNight
11%222%35%25%4
531
21st to endNight
9%110%39%34%7%
584
June1st to 10thNight
7%211%37%36%7%
540
11th to 20thNight
317%33%45%10%
540
21st to endNight
5%9%31%45%11%
540
July1st to 10thNight
5%15%25%50%13%
525
11th to 20thNight
6%15%23%46%19%
522
21st to endNight
5%16%24%50%15%
591
August1st to 10thNight
4425%52%14%
537
11th to 20thNight
6%1430%47%12%
534
21st to endNight
9%16%23%49%11%
594
September1st to 10thNight
11%16%32%45%5%
540
11th to 20thNight
11%111%29%41%6%
639
21st to endNight
10%212%33%39%4
720
October1st to 10thNight
8%213%37%34%5%
720
11th to 20thNight
13%420%40%21%2
720
21st to endNight
19%421%33%21%2
792
November1st to 10thNight
14%420%38%23%2
740
11th to 20thNight
12%8%30%37%12%1
760
21st to endNight
19%7%27%33%13%1
760
December1st to 10thNight
21%9%31%31%8%1
760
11th to 20thNight
20%7%33%31%9%
760
21st to endNight
25%9%31%29%6%
1040
Page generated at 2024-01-11 12:32:02. Version ac07

Copyright 2024 Attilla Danko


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