Lake Mineral Wells State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lake Mineral Wells State Park clear sky chart from 2005-11-05 to 2018-10-08.

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%
16953
30%
51098
20%
16908
61%
16908
42%
27240

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
42%
972
33%
2522
14%
970
53%
970
44%
1420
January16th to endNight
42%
1037
36%
2701
15%
1037
54%
1037
45%
1504
February1st to 15thNight
39%
764
29%
2287
14%
758
50%
758
37%
1255
February16th to endNight
26%
684
30%
2050
10%
684
42%
684
35%
1146
March1st to 15thNight
34%
618
28%
2178
16%
618
48%
618
29%
1212
March16th to endNight
33%
624
27%
2288
16%
624
48%
624
32%
1181
April1st to 15thNight
31%
584
25%
2142
13%
584
48%
584
33%
1076
April16th to endNight
36%
579
29%
1798
17%
579
54%
579
40%
962
May1st to 15thNight
37%
585
26%
1755
16%
585
52%
585
36%
1011
May16th to endNight
51%
610
27%
1828
21%
609
63%
609
42%
1001
June1st to 15thNight
69%
585
25%
1755
24%
585
76%
585
54%
842
June16th to endNight
73%
585
27%
1755
28%
585
78%
585
50%
881
July1st to 15thNight
78%
555
25%
1665
27%
555
82%
555
48%
870
July16th to endNight
86%
612
33%
1738
40%
579
88%
579
60%
803
August1st to 15thNight
87%
575
36%
1717
40%
572
88%
572
56%
802
August16th to endNight
82%
621
29%
2089
35%
621
83%
621
42%
1048
September1st to 15thNight
71%
585
23%
2145
28%
585
73%
585
32%
1169
September16th to endNight
71%
582
32%
2145
33%
582
75%
582
36%
1098
October1st to 15thNight
63%
597
35%
2101
30%
597
70%
597
43%
1004
October16th to endNight
54%
768
39%
2304
22%
768
65%
768
52%
1109
November1st to 15thNight
50%
841
30%
2361
15%
841
60%
841
45%
1279
November16th to endNight
42%
975
37%
2535
16%
975
53%
975
45%
1426
December1st to 15thNight
42%
975
33%
2535
16%
975
52%
975
41%
1485
December16th to endNight
36%
1040
30%
2704
12%
1040
47%
1040
36%
1656

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
8%41332445%6%54%
52027
Night
7%313323347%59%
51299
Cloud CoverDay
9%413324446%54%
52025
Night
7%313313347%59%
51299
TransparencyDay
29%5%10%22%23%8%
51725
Night
25%49%22%25%12%
51104
SeeingDay
9%420%31%25%8%
6949
Night
9%5%29%37%16%1
16957

By Month

Percentage Cloud Cover SW (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
11%423323225%59%
1746
16th to endDay
10%413222345%59%
1885
February1st to 15thDay
10%423213435%57%
1900
16th to endDay
16%6%1421223455%
1710
March1st to 15thDay
14%5%13324445%49%
2110
16th to endDay
12%5%23323346%53%
2288
April1st to 15thDay
8%324424446%55%
2136
16th to endDay
9%5%2332335%6%55%
2432
May1st to 15thDay
11%5%2432335%6%49%
2526
16th to endDay
8%4245%35%5%5%7%47%
2638
June1st to 15thDay
431332446%7%57%
2535
16th to endDay
5%32342445%8%55%
2535
July1st to 15thDay
5%3145%35%5%6%9%49%
2535
16th to endDay
2113436%5%7%10%52%
2674
August1st to 15thDay
2213336%5%5%9%56%
2486
16th to endDay
4313435%5%7%9%49%
2461
September1st to 15thDay
10%415%5%2445%7%46%
2145
16th to endDay
10%41432445%7%50%
2145
October1st to 15thDay
8%323423345%59%
2015
16th to endDay
6%3321222470%
1920
November1st to 15thDay
8%413323345%58%
1823
16th to endDay
10%313211235%63%
1755
December1st to 15thDay
12%6%1432334453%
1755
16th to endDay
14%6%1422335%5%49%
1872
January1st to 15thNight
9%323312235%61%
2522
16th to endNight
10%412112235%62%
2701
February1st to 15thNight
10%5%22322335%58%
2282
16th to endNight
13%422213335%56%
2050
March1st to 15thNight
11%5%24414335%53%
2178
16th to endNight
8%324224347%57%
2288
April1st to 15thNight
7%31332435%6%57%
2142
16th to endNight
9%32332235%6%58%
1798
May1st to 15thNight
8%4134145%47%53%
1754
16th to endNight
6%31331335%10%55%
1827
June1st to 15thNight
11222346%10%62%
1755
16th to endNight
2113224348%64%
1755
July1st to 15thNight
321322446%10%58%
1755
16th to endNight
111122346%10%64%
1846
August1st to 15thNight
11222435%8%66%
1727
16th to endNight
421332446%12%54%
2089
September1st to 15thNight
8%424433447%52%
2145
16th to endNight
7%31432435%7%55%
2145
October1st to 15thNight
7%313323346%62%
2101
16th to endNight
6%2231123470%
2304
November1st to 15thNight
5%31432333364%
2361
16th to endNight
10%313212335%62%
2535
December1st to 15thNight
11%413213336%56%
2535
16th to endNight
11%6%24323336%52%
2704

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
10%423323235%59%
1746
16th to endDay
11%313213335%59%
1885
February1st to 15thDay
11%423312435%57%
1900
16th to endDay
16%5%1331222455%
1710
March1st to 15thDay
14%5%14324345%50%
2110
16th to endDay
12%5%24313436%53%
2286
April1st to 15thDay
8%325%323446%55%
2136
16th to endDay
9%42332345%6%55%
2432
May1st to 15thDay
11%435%42335%6%49%
2526
16th to endDay
8%424426%5%5%7%47%
2638
June1st to 15thDay
4313325%46%7%58%
2535
16th to endDay
5%3134235%5%9%54%
2535
July1st to 15thDay
5%2245%35%5%5%9%49%
2535
16th to endDay
3114345%5%6%11%52%
2674
August1st to 15thDay
2213435%5%6%8%56%
2486
16th to endDay
5%323435%47%9%49%
2461
September1st to 15thDay
10%415%5%3445%7%46%
2145
16th to endDay
11%41333445%7%50%
2145
October1st to 15thDay
8%313423345%58%
2015
16th to endDay
6%31321222470%
1920
November1st to 15thDay
8%413323345%58%
1823
16th to endDay
10%31321223464%
1755
December1st to 15thDay
12%6%1431334453%
1755
16th to endDay
14%6%14323346%49%
1872
January1st to 15thNight
9%323312235%61%
2522
16th to endNight
10%422112335%63%
2701
February1st to 15thNight
9%5%23323335%58%
2282
16th to endNight
13%422213335%56%
2050
March1st to 15thNight
11%5%24323335%54%
2178
16th to endNight
8%313223346%57%
2288
April1st to 15thNight
7%313323347%57%
2142
16th to endNight
9%323412346%58%
1798
May1st to 15thNight
9%3243145%46%53%
1754
16th to endNight
6%314213449%56%
1827
June1st to 15thNight
11231346%11%62%
1755
16th to endNight
212313448%65%
1755
July1st to 15thNight
31133245%6%9%58%
1755
16th to endNight
111121346%10%64%
1846
August1st to 15thNight
21211345%9%65%
1727
16th to endNight
421322446%12%54%
2089
September1st to 15thNight
8%424424447%52%
2145
16th to endNight
7%41432335%7%55%
2145
October1st to 15thNight
7%312313246%62%
2101
16th to endNight
6%21221123470%
2304
November1st to 15thNight
5%31332343364%
2361
16th to endNight
10%31321223462%
2535
December1st to 15thNight
11%412313336%57%
2535
16th to endNight
11%6%24323336%52%
2704

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
30%27%20%29%9%
1747
16th to endDay
27%36%18%30%13%
1885
February1st to 15thDay
29%47%21%26%11%
1901
16th to endDay
34%25%17%24%14%
1710
March1st to 15thDay
36%37%16%24%10%
2110
16th to endDay
32%410%22%20%9%
2288
April1st to 15thDay
29%410%23%17%13%
2136
16th to endDay
29%49%21%25%9%
2432
May1st to 15thDay
35%5%9%20%20%9%
2526
16th to endDay
33%7%12%22%20%2
2642
June1st to 15thDay
23%6%14%27%24%3
2535
16th to endDay
26%5%13%26%22%5%
2535
July1st to 15thDay
28%6%17%27%16%2
2396
16th to endDay
21%8%15%30%22%1
2519
August1st to 15thDay
22%6%14%27%25%3
2472
16th to endDay
27%7%15%28%17%3
2461
September1st to 15thDay
35%5%10%20%20%7%
2145
16th to endDay
32%5%8%20%23%10%
2145
October1st to 15thDay
26%49%24%20%13%
2015
16th to endDay
20%26%19%30%20%
1920
November1st to 15thDay
27%48%23%25%11%
1823
16th to endDay
25%25%20%28%16%
1755
December1st to 15thDay
34%36%20%26%9%
1755
16th to endDay
36%35%21%23%8%
1872
January1st to 15thNight
26%26%19%29%14%
2522
16th to endNight
25%26%17%30%17%
2701
February1st to 15thNight
29%37%16%25%17%
2292
16th to endNight
30%37%18%24%16%
2050
March1st to 15thNight
33%46%16%23%15%
2178
16th to endNight
27%6%11%22%24%8%
2288
April1st to 15thNight
27%410%20%19%16%
2142
16th to endNight
26%410%19%27%11%
1798
May1st to 15thNight
30%5%10%21%21%10%
1755
16th to endNight
24%6%14%26%23%3
1829
June1st to 15thNight
15%6%13%34%22%7%
1755
16th to endNight
18%6%11%28%27%7%
1755
July1st to 15thNight
20%6%13%34%20%4
1665
16th to endNight
13%5%16%33%27%4
1738
August1st to 15thNight
15%411%30%29%7%
1717
16th to endNight
22%6%11%30%23%5%
2089
September1st to 15thNight
30%5%10%21%22%8%
2145
16th to endNight
27%48%21%25%12%
2145
October1st to 15thNight
22%310%24%21%16%
2101
16th to endNight
19%25%16%32%23%
2304
November1st to 15thNight
24%46%24%22%17%
2361
16th to endNight
26%25%16%32%17%
2535
December1st to 15thNight
29%37%21%25%12%
2535
16th to endNight
34%26%20%23%11%
2704

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
15%8%33%32%8%1
135
16th to endDay
7%8%43%25%11%3
144
February1st to 15thDay
6%11%42%27%11%
135
16th to endDay
27%9%33%21%8%
120
March1st to 15thDay
17%14%31%31%5%
135
16th to endDay
11%11%38%30%6%2
144
April1st to 15thDay
13%18%32%22%12%
135
16th to endDay
11%13%38%23%11%1
444
May1st to 15thDay
12%7%36%32%9%1
543
16th to endDay
13%5%29%33%13%4
597
June1st to 15thDay
5%114%46%26%5%
570
16th to endDay
4114%38%32%8%
570
July1st to 15thDay
6%6%33%37%15%
550
16th to endDay
2425%48%19%
595
August1st to 15thDay
4330%45%15%
549
16th to endDay
7%15%31%36%18%
373
September1st to 15thDay
5%1316%43%31%
180
16th to endDay
17%5%21%37%16%
180
October1st to 15thDay
213%36%34%12%
157
16th to endDay
12%419%34%24%4
144
November1st to 15thDay
18%232%28%14%2
135
16th to endDay
17%12%28%24%12%3
135
December1st to 15thDay
16%5%34%29%11%2
135
16th to endDay
20%13%35%22%7%
144
January1st to 15thNight
11%8%32%36%9%
975
16th to endNight
12%8%33%36%8%
1037
February1st to 15thNight
13%7%36%36%5%
764
16th to endNight
16%9%45%26%2
684
March1st to 15thNight
13%9%39%31%5%
618
16th to endNight
9%11%43%31%4
624
April1st to 15thNight
9%11%45%28%4
584
16th to endNight
9%8%43%30%7%
579
May1st to 15thNight
10%6%42%31%7%1
585
16th to endNight
6%433%37%17%1
611
June1st to 15thNight
2123%52%18%1
585
16th to endNight
2117%51%24%2
585
July1st to 15thNight
4110%45%34%3
555
16th to endNight
35%47%41%2
612
August1st to 15thNight
1444%45%3
575
16th to endNight
5%442%41%4
621
September1st to 15thNight
9%18%37%39%3
585
16th to endNight
9%11%42%32%2
582
October1st to 15thNight
8%221%40%24%1
597
16th to endNight
8%5%30%36%18%
768
November1st to 15thNight
7%433%36%17%1
841
16th to endNight
13%7%35%31%11%1
975
December1st to 15thNight
16%6%31%37%7%
975
16th to endNight
15%7%37%31%7%
1040
Page generated at 2018-10-09 09:39:18. Version ac04

Copyright 2018 A. Danko


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