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 2017-04-24.

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%
15222
31%
45591
20%
15177
61%
15177
43%
24103

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
35%
522
30%
1617
16%
522
54%
522
42%
857
May1st to 15thNight
34%
495
27%
1485
13%
495
53%
495
35%
852
May16th to endNight
53%
514
26%
1540
22%
513
64%
513
43%
825
June1st to 15thNight
57%
495
25%
1485
20%
495
67%
495
49%
749
June16th to endNight
69%
495
24%
1485
25%
495
73%
495
48%
755
July1st to 15thNight
75%
465
23%
1395
24%
465
77%
465
44%
743
July16th to endNight
87%
522
32%
1468
37%
489
89%
489
57%
681
August1st to 15thNight
87%
494
36%
1475
42%
491
88%
491
55%
708
August16th to endNight
81%
525
28%
1745
34%
525
83%
525
44%
870
September1st to 15thNight
65%
495
25%
1815
28%
495
69%
495
30%
1015
September16th to endNight
68%
492
34%
1815
33%
492
73%
492
37%
898
October1st to 15thNight
59%
517
36%
1837
30%
517
67%
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
61%
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%56%
46013
Night
7%313313346%60%
45787
Cloud CoverDay
8%413323346%56%
46011
Night
7%313313346%60%
45787
TransparencyDay
27%49%22%25%9%
45711
Night
24%49%21%26%13%
45592
SeeingDay
8%421%33%25%7%
4961
Night
9%5%30%37%15%
15224

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%413213346%57%
2201
May1st to 15thDay
12%6%24423445%49%
2136
16th to endDay
9%433435%46%7%46%
2222
June1st to 15thDay
6%21333346%8%56%
2145
16th to endDay
432332435%8%57%
2145
July1st to 15thDay
8%423435%46%10%47%
2145
16th to endDay
311332445%7%59%
2284
August1st to 15thDay
221332445%8%61%
2145
16th to endDay
5%213435%5%6%8%53%
2099
September1st to 15thDay
13%314434447%47%
1815
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%313222347%60%
1617
May1st to 15thNight
10%413323446%55%
1484
16th to endNight
6%21232445%7%59%
1539
June1st to 15thNight
5%2112135%5%11%59%
1485
16th to endNight
321331335%9%61%
1485
July1st to 15thNight
42134245%7%8%55%
1485
16th to endNight
211221335%10%65%
1576
August1st to 15thNight
1123245%6%10%61%
1485
16th to endNight
42133245%7%10%55%
1745
September1st to 15thNight
11%42442345%5%51%
1815
16th to endNight
5%31442345%5%58%
1815
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%
2201
May1st to 15thDay
12%5%24423446%49%
2136
16th to endDay
9%5%244345%7%7%46%
2222
June1st to 15thDay
6%21332445%9%56%
2145
16th to endDay
5%22332445%8%57%
2145
July1st to 15thDay
8%323435%47%9%47%
2145
16th to endDay
321332445%8%59%
2284
August1st to 15thDay
221332446%8%60%
2145
16th to endDay
4314435%46%8%52%
2099
September1st to 15thDay
13%3145%24447%47%
1815
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%323312347%60%
1617
May1st to 15thNight
9%41332345%7%54%
1484
16th to endNight
6%112324448%59%
1539
June1st to 15thNight
5%2221445%11%59%
1485
16th to endNight
431331335%9%61%
1485
July1st to 15thNight
42134245%6%9%54%
1485
16th to endNight
211121426%9%65%
1576
August1st to 15thNight
211232446%9%61%
1485
16th to endNight
4233245%7%11%55%
1745
September1st to 15thNight
10%5%25%423446%51%
1815
16th to endNight
5%32432345%5%58%
1815
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%11%
2201
May1st to 15thDay
36%5%10%17%20%9%
2136
16th to endDay
34%8%12%21%19%4
2226
June1st to 15thDay
25%5%14%24%24%6%
2145
16th to endDay
24%5%13%24%23%8%
2145
July1st to 15thDay
31%6%15%24%19%3
2006
16th to endDay
19%6%13%28%28%3
2129
August1st to 15thDay
20%5%13%25%27%8%
2131
16th to endDay
26%7%14%25%21%5%
2099
September1st to 15thDay
36%5%11%17%19%9%
1815
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%26%12%
1617
May1st to 15thNight
28%6%12%17%21%12%
1485
16th to endNight
22%7%17%23%22%6%
1541
June1st to 15thNight
19%5%13%31%23%7%
1485
16th to endNight
21%5%12%24%27%10%
1485
July1st to 15thNight
22%7%11%30%21%6%
1395
16th to endNight
15%412%28%35%4
1468
August1st to 15thNight
16%5%10%25%29%12%
1475
16th to endNight
20%6%13%24%26%7%
1745
September1st to 15thNight
33%5%9%19%21%11%
1815
16th to endNight
25%47%19%27%15%
1815
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%10%39%27%9%1
365
May1st to 15thDay
11%7%42%27%9%1
393
16th to endDay
13%431%30%15%3
437
June1st to 15thDay
7%119%42%24%4
420
16th to endDay
6%113%38%31%8%
420
July1st to 15thDay
7%8%43%35%5%
400
16th to endDay
4327%46%17%
445
August1st to 15thDay
3329%49%13%
418
16th to endDay
6%110%35%32%13%
267
September1st to 15thDay
3123%47%24%
90
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%
522
May1st to 15thNight
10%7%44%27%8%1
495
16th to endNight
6%134%37%17%1
515
June1st to 15thNight
6%30%44%17%
495
16th to endNight
3119%52%20%1
495
July1st to 15thNight
5%11%49%32%1
465
16th to endNight
2444%45%2
522
August1st to 15thNight
2247%44%2
494
16th to endNight
5%5%44%42%2
525
September1st to 15thNight
13%113%39%30%2
495
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 2017-04-25 06:48:27. Version ac04

Copyright 2017 A. Danko


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