Wichita Falls
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Wichita Falls clear sky chart from 2005-11-05 to 2017-09-16.

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%
15648
31%
46917
20%
15603
61%
15603
43%
24735

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
44%
899
32%
2327
15%
895
56%
895
47%
1289
January16th to endNight
46%
958
36%
2494
17%
958
58%
958
48%
1378
February1st to 15thNight
38%
704
29%
2112
14%
700
50%
700
39%
1157
February16th to endNight
32%
632
33%
1894
12%
632
49%
632
40%
1006
March1st to 15thNight
35%
594
30%
2034
15%
594
51%
594
34%
1095
March16th to endNight
34%
576
26%
2112
17%
576
48%
576
33%
1083
April1st to 15thNight
29%
539
24%
1943
13%
539
47%
539
34%
976
April16th to endNight
34%
540
30%
1671
16%
540
53%
540
41%
894
May1st to 15thNight
36%
540
26%
1620
14%
540
54%
540
38%
910
May16th to endNight
53%
562
28%
1684
23%
561
65%
561
43%
891
June1st to 15thNight
58%
540
23%
1620
19%
540
68%
540
48%
825
June16th to endNight
70%
540
27%
1620
27%
540
73%
540
49%
816
July1st to 15thNight
76%
510
22%
1530
23%
510
78%
510
44%
812
July16th to endNight
87%
564
33%
1594
38%
531
89%
531
58%
738
August1st to 15thNight
86%
539
33%
1610
39%
536
86%
536
53%
788
August16th to endNight
82%
573
30%
1905
36%
573
84%
573
45%
940
September1st to 15thNight
67%
540
25%
1980
28%
540
70%
540
32%
1072
September16th to endNight
68%
492
34%
1817
33%
492
73%
492
37%
899
October1st to 15thNight
59%
517
36%
1837
30%
517
66%
517
41%
907
October16th to endNight
54%
704
38%
2112
21%
704
65%
704
52%
1021
November1st to 15thNight
51%
825
32%
2225
15%
825
62%
825
52%
1141
November16th to endNight
44%
900
36%
2340
16%
900
55%
900
46%
1301
December1st to 15thNight
45%
900
34%
2340
16%
900
56%
900
45%
1316
December16th to endNight
38%
960
32%
2496
14%
960
50%
960
40%
1480

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%313323346%57%
47822
Night
7%313313346%60%
47113
Cloud CoverDay
8%313323346%57%
47820
Night
7%313313346%60%
47113
TransparencyDay
27%410%23%25%9%
47520
Night
24%49%21%26%12%
46918
SeeingDay
8%420%32%25%8%
5628
Night
9%5%30%37%16%
15650

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
9%5%23213336%58%
1611
16th to endDay
9%414323235%60%
1740
February1st to 15thDay
9%423212345%60%
1750
16th to endDay
12%6%23211225%59%
1580
March1st to 15thDay
13%324323436%52%
1924
16th to endDay
11%5%23323245%54%
2112
April1st to 15thDay
10%313223445%58%
2002
16th to endDay
10%313213346%57%
2288
May1st to 15thDay
11%5%13423445%51%
2331
16th to endDay
9%433425%46%7%48%
2430
June1st to 15thDay
6%31333345%8%56%
2340
16th to endDay
432332435%8%58%
2340
July1st to 15thDay
7%313335%46%9%49%
2340
16th to endDay
311232446%8%59%
2466
August1st to 15thDay
321342445%8%59%
2340
16th to endDay
5%21343446%8%54%
2291
September1st to 15thDay
12%314434346%51%
1980
16th to endDay
7%31431445%6%56%
1815
October1st to 15thDay
9%31323335%5%58%
1782
16th to endDay
5%21221233469%
1760
November1st to 15thDay
5%312222336%66%
1632
16th to endDay
8%3231233466%
1620
December1st to 15thDay
10%6%14323335%55%
1620
16th to endDay
13%5%14312335%54%
1728
January1st to 15thNight
7%413222345%62%
2327
16th to endNight
8%313212236%63%
2494
February1st to 15thNight
10%5%12212235%59%
2102
16th to endNight
10%422212325%61%
1894
March1st to 15thNight
12%413323335%56%
2034
16th to endNight
9%423323346%57%
2112
April1st to 15thNight
8%323323347%56%
1943
16th to endNight
8%313322247%59%
1671
May1st to 15thNight
9%412313446%57%
1619
16th to endNight
6%21232445%7%60%
1683
June1st to 15thNight
42113135%5%11%59%
1620
16th to endNight
321331335%9%62%
1620
July1st to 15thNight
42134235%6%8%56%
1620
16th to endNight
21221336%10%64%
1702
August1st to 15thNight
2123245%6%10%60%
1620
16th to endNight
42133245%7%10%56%
1905
September1st to 15thNight
10%42442345%5%54%
1980
16th to endNight
5%31442345%5%58%
1817
October1st to 15thNight
8%412212346%61%
1837
16th to endNight
6%21221223470%
2112
November1st to 15thNight
421331334467%
2225
16th to endNight
9%312212235%63%
2340
December1st to 15thNight
11%312212345%61%
2340
16th to endNight
10%424322345%55%
2496

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
8%5%14222336%58%
1611
16th to endDay
9%313223235%60%
1740
February1st to 15thDay
9%42321233460%
1750
16th to endDay
11%6%2321122459%
1580
March1st to 15thDay
12%424324335%52%
1924
16th to endDay
10%5%23323345%54%
2110
April1st to 15thDay
10%312313345%58%
2002
16th to endDay
9%41332335%6%57%
2288
May1st to 15thDay
11%5%23423435%52%
2331
16th to endDay
8%5%244345%6%6%48%
2430
June1st to 15thDay
6%21332435%9%56%
2340
16th to endDay
5%22332445%8%58%
2340
July1st to 15thDay
7%323435%46%9%49%
2340
16th to endDay
311231446%8%59%
2466
August1st to 15thDay
321332446%8%59%
2340
16th to endDay
5%313425%46%8%53%
2291
September1st to 15thDay
12%314424346%51%
1980
16th to endDay
7%3144235%46%57%
1815
October1st to 15thDay
9%312323245%58%
1782
16th to endDay
5%212212335%69%
1760
November1st to 15thDay
5%312212336%66%
1632
16th to endDay
8%31231222466%
1620
December1st to 15thDay
10%6%24313335%55%
1620
16th to endDay
12%5%23313335%55%
1728
January1st to 15thNight
7%412322335%62%
2327
16th to endNight
7%312312245%63%
2494
February1st to 15thNight
11%41221223460%
2102
16th to endNight
11%412212325%61%
1894
March1st to 15thNight
11%413322335%56%
2034
16th to endNight
8%423313447%57%
2112
April1st to 15thNight
8%223323348%56%
1943
16th to endNight
8%323322347%59%
1671
May1st to 15thNight
9%31332345%7%56%
1619
16th to endNight
6%112324448%60%
1683
June1st to 15thNight
42221445%11%59%
1620
16th to endNight
331331335%9%61%
1620
July1st to 15thNight
4213425%5%6%9%55%
1620
16th to endNight
21121336%10%64%
1702
August1st to 15thNight
211232446%9%60%
1620
16th to endNight
4223245%7%11%56%
1905
September1st to 15thNight
9%424423346%54%
1980
16th to endNight
5%32432345%5%58%
1817
October1st to 15thNight
8%412212346%61%
1837
16th to endNight
6%21221222470%
2112
November1st to 15thNight
421321334467%
2225
16th to endNight
9%312212245%64%
2340
December1st to 15thNight
11%212212245%61%
2340
16th to endNight
11%424323345%56%
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
27%46%22%30%9%
1612
16th to endDay
27%35%21%32%8%
1740
February1st to 15thDay
26%46%22%29%9%
1751
16th to endDay
30%25%19%29%12%
1580
March1st to 15thDay
33%48%20%23%10%
1924
16th to endDay
33%47%24%21%9%
2112
April1st to 15thDay
27%49%24%19%14%
2002
16th to endDay
27%49%21%25%10%
2288
May1st to 15thDay
34%5%9%17%22%9%
2331
16th to endDay
32%7%12%21%20%4
2434
June1st to 15thDay
25%6%13%24%24%5%
2340
16th to endDay
23%5%13%25%23%8%
2340
July1st to 15thDay
29%6%15%25%20%2
2201
16th to endDay
18%6%14%29%27%3
2311
August1st to 15thDay
21%5%13%25%25%7%
2326
16th to endDay
26%7%13%25%21%5%
2291
September1st to 15thDay
33%5%10%20%21%8%
1980
16th to endDay
26%6%9%22%23%12%
1815
October1st to 15thDay
27%410%22%25%10%
1782
16th to endDay
18%37%21%32%15%
1760
November1st to 15thDay
20%39%25%28%13%
1632
16th to endDay
23%35%20%31%15%
1620
December1st to 15thDay
31%37%23%27%5%
1620
16th to endDay
32%37%24%25%7%
1728
January1st to 15thNight
24%38%18%31%14%
2327
16th to endNight
24%36%18%32%15%
2494
February1st to 15thNight
29%37%19%26%14%
2112
16th to endNight
26%26%22%25%16%
1894
March1st to 15thNight
31%27%18%24%15%
2034
16th to endNight
27%5%11%23%22%9%
2112
April1st to 15thNight
27%312%17%22%16%
1943
16th to endNight
25%410%20%25%12%
1671
May1st to 15thNight
27%6%12%17%23%13%
1620
16th to endNight
21%7%16%23%24%6%
1685
June1st to 15thNight
20%5%12%31%23%6%
1620
16th to endNight
20%411%24%28%10%
1620
July1st to 15thNight
22%6%11%30%23%5%
1530
16th to endNight
14%412%28%34%4
1594
August1st to 15thNight
17%5%11%25%28%11%
1610
16th to endNight
20%6%13%25%26%8%
1905
September1st to 15thNight
31%5%8%20%23%10%
1980
16th to endNight
25%47%19%27%15%
1817
October1st to 15thNight
24%49%22%22%16%
1837
16th to endNight
19%35%19%32%20%
2112
November1st to 15thNight
19%38%23%27%18%
2225
16th to endNight
24%35%17%31%17%
2340
December1st to 15thNight
25%37%23%28%10%
2340
16th to endNight
30%37%21%26%11%
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
21%6%28%34%5%3
90
16th to endDay
6%6%42%31%13%
96
February1st to 15thDay
411%36%40%7%
90
16th to endDay
13%244%29%8%1
81
March1st to 15thDay
14%14%38%27%4
90
16th to endDay
6%11%35%31%12%3
96
April1st to 15thDay
17%9%30%30%11%
121
16th to endDay
11%12%39%26%8%1
398
May1st to 15thDay
10%7%40%29%10%2
468
16th to endDay
12%5%32%30%14%3
517
June1st to 15thDay
7%118%43%23%5%
495
16th to endDay
6%112%37%32%9%
495
July1st to 15thDay
6%8%40%36%8%
475
16th to endDay
3325%47%19%
515
August1st to 15thDay
4330%47%13%
493
16th to endDay
6%19%33%34%14%
331
September1st to 15thDay
222%41%32%
135
16th to endDay
3130%43%22%
90
October1st to 15thDay
7%110%43%26%11%
90
16th to endDay
10%118%37%28%4
96
November1st to 15thDay
8%8%17%37%24%2
90
16th to endDay
17%15%34%22%6%3
90
December1st to 15thDay
10%5%40%30%12%2
90
16th to endDay
10%8%45%25%10%
96
January1st to 15thNight
9%7%35%37%9%
900
16th to endNight
9%7%34%40%8%
958
February1st to 15thNight
14%7%37%34%6%
704
16th to endNight
12%9%43%29%3
632
March1st to 15thNight
13%8%39%32%5%
594
16th to endNight
9%9%44%30%6%
576
April1st to 15thNight
9%12%47%27%3
539
16th to endNight
8%6%48%29%6%
540
May1st to 15thNight
9%6%45%27%9%1
540
16th to endNight
6%234%37%17%1
563
June1st to 15thNight
6%29%44%18%
540
16th to endNight
3118%53%21%1
540
July1st to 15thNight
5%11%48%33%1
510
16th to endNight
2443%46%3
564
August1st to 15thNight
2247%44%1
539
16th to endNight
45%43%43%2
573
September1st to 15thNight
12%112%39%32%2
540
16th to endNight
6%15%43%31%2
492
October1st to 15thNight
10%225%39%20%
517
16th to endNight
6%432%38%16%
704
November1st to 15thNight
6%5%32%38%14%2
825
16th to endNight
11%7%35%32%12%
900
December1st to 15thNight
13%6%33%39%7%
900
16th to endNight
12%7%37%33%8%
960
Page generated at 2017-09-16 16:07:01. Version ac04

Copyright 2017 A. Danko


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