Smithville Reservoir
Clear Sky Chart
History

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

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
40%
24498
22%
74699
13%
24435
49%
24435
30%
45360

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
30%
950
23%
2458
9%
946
41%
946
30%
1589
January11th to 20thNight
26%
905
22%
2353
8%
905
35%
905
25%
1590
January21st to endNight
25%
990
21%
2574
6%
990
35%
990
27%
1737
February1st to 10thNight
22%
900
16%
2340
5%
900
29%
900
23%
1645
February11th to 20thNight
26%
879
18%
2274
6%
875
33%
875
26%
1535
February21st to endNight
20%
573
24%
1757
7%
573
34%
573
25%
1104
March1st to 10thNight
25%
540
25%
1980
10%
540
42%
540
26%
1120
March11th to 20thNight
31%
540
20%
1980
12%
540
42%
540
20%
1235
March21st to endNight
21%
594
13%
2178
7%
594
29%
594
15%
1490
April1st to 10thNight
30%
540
21%
1870
12%
540
44%
540
28%
1061
April11th to 20thNight
30%
533
22%
1775
15%
533
43%
533
25%
1066
April21st to endNight
28%
540
21%
1670
12%
540
43%
540
25%
1065
May1st to 10thNight
37%
540
17%
1620
11%
540
45%
540
23%
1060
May11th to 20thNight
44%
531
19%
1594
17%
531
50%
531
30%
977
May21st to endNight
47%
584
19%
1631
12%
582
54%
582
32%
1020
June1st to 10thNight
66%
540
23%
1440
15%
540
70%
540
46%
798
June11th to 20thNight
61%
540
23%
1440
15%
540
65%
540
43%
832
June21st to endNight
59%
540
27%
1440
16%
540
63%
540
54%
759
July1st to 10thNight
72%
525
19%
1507
15%
525
74%
525
42%
842
July11th to 20thNight
70%
522
24%
1566
22%
522
73%
522
51%
768
July21st to endNight
70%
591
25%
1673
23%
558
74%
558
41%
900
August1st to 10thNight
71%
537
22%
1601
23%
534
75%
534
43%
858
August11th to 20thNight
71%
534
29%
1600
30%
534
75%
534
42%
861
August21st to endNight
72%
594
29%
1926
33%
594
75%
594
44%
966
September1st to 10thNight
64%
540
27%
1800
28%
540
68%
540
35%
983
September11th to 20thNight
62%
540
30%
1944
29%
540
69%
540
36%
1013
September21st to endNight
59%
541
30%
1981
27%
541
67%
541
37%
983
October1st to 10thNight
48%
720
26%
2160
18%
720
53%
720
37%
1212
October11th to 20thNight
34%
720
28%
2160
13%
720
46%
720
35%
1236
October21st to endNight
33%
792
25%
2376
12%
792
44%
792
29%
1434
November1st to 10thNight
41%
742
31%
2222
16%
742
54%
742
40%
1163
November11th to 20thNight
33%
950
27%
2581
10%
950
46%
950
35%
1533
November21st to endNight
32%
950
23%
2660
9%
950
43%
950
31%
1645
December1st to 10thNight
32%
950
20%
2660
8%
950
42%
950
27%
1705
December11th to 20thNight
28%
949
21%
3133
8%
948
37%
948
23%
1935
December21st to endNight
23%
1042
13%
4775
7%
1026
36%
1026
11%
3640

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%7%36%5%3445%7%44%
74602
Night
11%7%35%43445%7%48%
75098
TransparencyDay
40%5%13%25%15%2
74325
Night
37%412%27%18%3
74895
SeeingDay
15%9%29%28%16%4
14521
Night
14%9%32%32%12%1
24502

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
12%8%47%6%35%448%41%
1707
11th to 20thDay
13%12%5%6%5%35%436%39%
1620
21st to endDay
12%9%5%9%5%4446%6%35%
1782
February1st to 10thDay
14%11%5%7%6%3345%6%37%
1620
11th to 20thDay
12%10%47%5%2435%7%40%
1574
21st to endDay
13%10%37%424446%42%
1511
March1st to 10thDay
13%9%47%5%2445%6%42%
1980
11th to 20thDay
19%11%37%5%24446%36%
1980
21st to endDay
20%12%46%6%34346%30%
2178
April1st to 10thDay
15%7%26%424447%44%
2089
11th to 20thDay
15%9%45%5%3445%7%39%
2134
21st to endDay
20%7%36%5%345%6%7%35%
2287
May1st to 10thDay
17%8%46%5%35%448%36%
2340
11th to 20thDay
15%7%36%6%3445%7%40%
2302
21st to endDay
14%8%36%6%45%6%6%6%37%
2644
June1st to 10thDay
7%4245%35%5%7%9%49%
2520
11th to 20thDay
7%4245%35%5%7%9%48%
2520
21st to endDay
7%325%436%5%6%9%50%
2520
July1st to 10thDay
9%424435%5%7%9%48%
2403
11th to 20thDay
6%325%435%5%7%9%52%
2340
21st to endDay
9%4245%35%5%6%9%47%
2546
August1st to 10thDay
7%426%5%45%5%6%11%44%
2328
11th to 20thDay
9%424435%5%5%9%48%
2301
21st to endDay
8%424335%5%6%7%54%
2430
September1st to 10thDay
12%424425%45%7%51%
2160
11th to 20thDay
9%5%245%345%5%7%50%
2013
21st to endDay
9%414433447%57%
1959
October1st to 10thDay
13%5%24424448%50%
1800
11th to 20thDay
14%5%24423345%54%
1800
21st to endDay
16%7%35%423347%47%
1980
November1st to 10thDay
9%5%34335%347%55%
1854
11th to 20thDay
14%6%24423446%51%
1596
21st to endDay
17%8%44424336%46%
1520
December1st to 10thDay
9%7%46%6%35%45%7%44%
1520
11th to 20thDay
12%9%47%6%34446%41%
1918
21st to endDay
17%14%7%13%5%2444425%
2826
January1st to 10thNight
8%7%36%6%3445%7%47%
2458
11th to 20thNight
11%9%5%7%435%46%7%41%
2353
21st to endNight
10%9%47%5%35%45%6%42%
2574
February1st to 10thNight
11%11%47%6%35%45%6%38%
2340
11th to 20thNight
13%8%47%5%345%47%42%
2273
21st to endNight
13%8%35%5%3435%6%45%
1757
March1st to 10thNight
12%7%35%42445%7%47%
1980
11th to 20thNight
16%8%36%5%3445%6%41%
1980
21st to endNight
21%10%46%5%25%446%33%
2178
April1st to 10thNight
10%7%35%5%34447%50%
1870
11th to 20thNight
13%8%345%23446%46%
1775
21st to endNight
17%6%25%5%24447%42%
1670
May1st to 10thNight
15%6%25%5%36%5%5%7%42%
1620
11th to 20thNight
13%5%35%5%2445%7%47%
1593
21st to endNight
10%426%5%445%5%8%46%
1630
June1st to 10thNight
5%322425%5%6%10%56%
1440
11th to 20thNight
5%324435%6%7%10%51%
1440
21st to endNight
5%32232345%9%62%
1440
July1st to 10thNight
6%3234245%6%10%53%
1552
11th to 20thNight
421341445%11%62%
1620
21st to endNight
6%3245%345%6%11%51%
1772
August1st to 10thNight
43135%36%5%6%11%53%
1611
11th to 20thNight
7%325%434347%58%
1600
21st to endNight
5%42442435%8%60%
1926
September1st to 10thNight
10%3145%235%46%56%
1800
11th to 20thNight
10%4234245%6%7%55%
1944
21st to endNight
7%325%5%34346%59%
1981
October1st to 10thNight
12%5%23323446%56%
2160
11th to 20thNight
14%6%2332335%6%55%
2160
21st to endNight
16%7%24422235%51%
2376
November1st to 10thNight
8%41342335%6%61%
2222
11th to 20thNight
11%6%24423446%54%
2581
21st to endNight
15%7%34323346%50%
2660
December1st to 10thNight
11%8%45%5%35%45%6%45%
2660
11th to 20thNight
12%8%37%5%2345%6%45%
3279
21st to endNight
20%16%7%9%5%2333428%
4823

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%311%26%15%1
1708
11th to 20thDay
50%311%23%12%1
1620
21st to endDay
49%5%15%20%10%1
1782
February1st to 10thDay
50%413%21%10%2
1620
11th to 20thDay
45%413%23%13%2
1583
21st to endDay
44%312%22%16%3
1511
March1st to 10thDay
44%412%24%13%3
1980
11th to 20thDay
51%48%23%12%2
1980
21st to endDay
57%413%17%8%1
2178
April1st to 10thDay
40%415%24%16%2
2089
11th to 20thDay
45%5%12%22%15%1
2134
21st to endDay
49%411%25%10%1
2287
May1st to 10thDay
49%5%12%21%12%1
2340
11th to 20thDay
45%5%15%23%13%
2306
21st to endDay
46%6%14%21%10%2
2644
June1st to 10thDay
30%6%16%32%14%2
2520
11th to 20thDay
31%6%15%28%18%1
2520
21st to endDay
29%6%16%30%15%4
2520
July1st to 10thDay
31%7%17%27%14%4
2339
11th to 20thDay
29%6%15%28%19%4
2271
21st to endDay
33%5%13%33%16%1
2405
August1st to 10thDay
33%7%18%28%12%1
2314
11th to 20thDay
31%6%12%33%17%1
2301
21st to endDay
29%6%12%27%21%6%
2430
September1st to 10thDay
33%5%12%27%18%6%
2160
11th to 20thDay
32%6%11%25%22%3
2013
21st to endDay
29%48%33%23%3
1959
October1st to 10thDay
34%413%28%19%3
1800
11th to 20thDay
35%27%28%23%5%
1800
21st to endDay
40%311%23%18%5%
1980
November1st to 10thDay
31%413%28%19%4
1854
11th to 20thDay
36%311%28%19%3
1596
21st to endDay
42%29%27%19%1
1520
December1st to 10thDay
41%414%26%14%1
1520
11th to 20thDay
46%314%27%8%1
1915
21st to endDay
64%310%15%7%1
2826
January1st to 10thNight
38%413%27%18%1
2458
11th to 20thNight
44%412%27%12%1
2353
21st to endNight
44%315%23%13%2
2574
February1st to 10thNight
48%411%21%13%3
2340
11th to 20thNight
43%412%22%16%3
2274
21st to endNight
41%410%22%18%6%
1757
March1st to 10thNight
36%411%27%18%4
1980
11th to 20thNight
45%410%23%15%3
1980
21st to endNight
53%413%19%9%2
2178
April1st to 10thNight
35%412%26%20%4
1870
11th to 20thNight
40%310%29%14%3
1775
21st to endNight
43%310%25%17%1
1670
May1st to 10thNight
43%5%13%24%14%1
1620
11th to 20thNight
37%5%14%26%17%1
1594
21st to endNight
37%5%16%27%13%2
1631
June1st to 10thNight
23%6%18%33%17%3
1440
11th to 20thNight
26%6%15%29%21%2
1440
21st to endNight
20%416%36%20%4
1440
July1st to 10thNight
27%6%14%33%17%4
1507
11th to 20thNight
19%5%16%34%23%3
1566
21st to endNight
27%412%38%18%1
1673
August1st to 10thNight
24%6%20%31%16%2
1601
11th to 20thNight
27%411%34%23%1
1600
21st to endNight
23%412%29%24%7%
1926
September1st to 10thNight
30%5%9%27%22%7%
1800
11th to 20thNight
28%5%10%28%24%4
1944
21st to endNight
27%47%30%28%4
1981
October1st to 10thNight
31%310%27%24%6%
2160
11th to 20thNight
32%37%27%22%8%
2160
21st to endNight
39%29%22%25%3
2376
November1st to 10thNight
26%414%28%23%6%
2222
11th to 20thNight
32%39%30%22%4
2581
21st to endNight
38%211%27%18%3
2660
December1st to 10thNight
41%312%28%15%1
2660
11th to 20thNight
41%312%30%13%1
3281
21st to endNight
62%37%18%8%1
4823

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
20%20%33%23%5%
270
11th to 20thDay
28%14%38%18%2
240
21st to endDay
15%17%45%22%2
264
February1st to 10thDay
23%21%42%13%2
240
11th to 20thDay
20%19%43%10%7%
240
21st to endDay
18%24%37%18%31
198
March1st to 10thDay
18%18%46%16%3
240
11th to 20thDay
34%9%33%20%4
240
21st to endDay
32%21%29%14%21
264
April1st to 10thDay
24%14%35%21%6%
349
11th to 20thDay
18%16%37%22%7%
412
21st to endDay
24%16%32%17%9%1
547
May1st to 10thDay
20%12%36%23%8%1
603
11th to 20thDay
20%11%30%25%12%2
625
21st to endDay
19%6%30%25%17%3
679
June1st to 10thDay
7%420%34%27%8%
630
11th to 20thDay
6%427%37%21%6%
630
21st to endDay
6%6%34%37%15%2
630
July1st to 10thDay
10%314%29%33%11%
621
11th to 20thDay
7%221%37%26%6%
618
21st to endDay
8%217%37%31%5%
684
August1st to 10thDay
7%217%40%29%6%
626
11th to 20thDay
8%417%37%29%5%
615
21st to endDay
9%216%32%31%9%
549
September1st to 10thDay
12%417%36%25%6%
450
11th to 20thDay
7%321%38%24%7%
303
21st to endDay
12%7%28%35%13%5%
270
October1st to 10thDay
16%6%27%30%16%6%
270
11th to 20thDay
12%19%41%20%6%1
270
21st to endDay
20%17%34%23%6%
297
November1st to 10thDay
16%8%40%26%8%3
270
11th to 20thDay
17%16%37%21%7%2
270
21st to endDay
22%13%35%21%8%
270
December1st to 10thDay
7%18%40%24%8%3
270
11th to 20thDay
21%14%35%24%5%1
270
21st to endDay
19%20%43%16%1
297
January1st to 10thNight
13%14%38%29%7%
950
11th to 20thNight
17%14%37%26%6%
905
21st to endNight
14%12%44%27%3
990
February1st to 10thNight
17%13%43%23%3
900
11th to 20thNight
17%14%37%28%3
879
21st to endNight
20%14%43%17%5%1
573
March1st to 10thNight
15%14%41%25%5%
540
11th to 20thNight
21%9%35%27%6%1
540
21st to endNight
27%10%39%21%3
594
April1st to 10thNight
12%13%42%28%4
540
11th to 20thNight
19%12%36%28%5%
533
21st to endNight
19%9%39%26%6%1
540
May1st to 10thNight
16%9%34%33%7%1
540
11th to 20thNight
16%7%29%36%12%1
531
21st to endNight
13%429%37%15%2
584
June1st to 10thNight
5%420%46%24%2
540
11th to 20thNight
6%225%46%19%2
540
21st to endNight
5%330%48%14%
540
July1st to 10thNight
6%214%43%31%4
525
11th to 20thNight
4216%47%29%2
522
21st to endNight
7%114%46%31%1
591
August1st to 10thNight
4217%47%30%1
537
11th to 20thNight
8%213%45%30%3
534
21st to endNight
7%114%41%34%3
594
September1st to 10thNight
11%217%42%24%4
540
11th to 20thNight
11%120%41%23%3
540
21st to endNight
7%6%23%43%20%2
541
October1st to 10thNight
15%5%29%32%17%2
720
11th to 20thNight
16%9%38%29%8%
720
21st to endNight
20%11%33%28%8%
792
November1st to 10thNight
10%10%36%34%9%1
742
11th to 20thNight
14%15%36%28%8%
950
21st to endNight
20%10%35%29%7%
950
December1st to 10thNight
16%13%35%29%6%1
950
11th to 20thNight
18%11%37%28%6%
950
21st to endNight
20%17%35%25%4
1045
Page generated at 2024-01-08 10:14:18. Version ac07

Copyright 2024 Attilla Danko


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