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 2018-04-23.

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%
16533
31%
49530
20%
16488
61%
16488
43%
26094

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
45%
974
33%
2522
14%
970
57%
970
47%
1388
January16th to endNight
46%
1038
37%
2702
17%
1038
58%
1038
49%
1472
February1st to 15thNight
39%
764
29%
2292
15%
760
51%
760
39%
1238
February16th to endNight
31%
684
31%
2050
11%
684
47%
684
37%
1128
March1st to 15thNight
35%
644
31%
2204
15%
644
52%
644
35%
1168
March16th to endNight
33%
624
27%
2288
16%
624
49%
624
34%
1164
April1st to 15thNight
28%
584
25%
2105
12%
584
48%
584
34%
1046
April16th to endNight
34%
558
30%
1726
17%
558
54%
558
41%
924
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
65%
537
34%
1980
32%
537
72%
537
36%
1007
October1st to 15thNight
59%
564
34%
2004
30%
564
66%
564
41%
984
October16th to endNight
54%
768
39%
2304
22%
768
65%
768
53%
1107
November1st to 15thNight
50%
896
31%
2416
14%
896
60%
896
51%
1252
November16th to endNight
44%
975
38%
2535
17%
975
56%
975
48%
1388
December1st to 15thNight
46%
975
34%
2535
16%
975
56%
975
46%
1416
December16th to endNight
37%
1040
32%
2704
14%
1040
49%
1040
39%
1620

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%413323346%57%
49985
Night
7%313313346%60%
49726
Cloud CoverDay
8%313323346%57%
49983
Night
7%313313346%60%
49726
TransparencyDay
27%410%23%25%9%
49683
Night
24%49%21%26%12%
49531
SeeingDay
9%422%32%24%7%
6289
Night
9%5%30%37%16%
16535

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
8%5%23223336%58%
1746
16th to endDay
8%313323235%62%
1885
February1st to 15thDay
9%424212245%59%
1900
16th to endDay
14%6%2321122456%
1710
March1st to 15thDay
12%314323446%53%
2084
16th to endDay
11%5%24323245%53%
2288
April1st to 15thDay
10%413213435%59%
2170
16th to endDay
10%313213346%57%
2347
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
8%31431445%6%54%
1980
October1st to 15thDay
9%313232345%60%
1944
16th to endDay
5%21221233470%
1920
November1st to 15thDay
6%313222336%64%
1771
16th to endDay
8%2231333466%
1755
December1st to 15thDay
9%6%24324335%55%
1755
16th to endDay
13%6%24313335%52%
1872
January1st to 15thNight
7%312222346%62%
2522
16th to endNight
7%213212235%65%
2702
February1st to 15thNight
10%5%12213335%59%
2282
16th to endNight
11%422312335%59%
2050
March1st to 15thNight
11%413313346%56%
2204
16th to endNight
9%323223347%57%
2288
April1st to 15thNight
7%323323347%57%
2105
16th to endNight
8%313222347%59%
1726
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
7%31442345%5%56%
1980
October1st to 15thNight
8%312213346%62%
2004
16th to endNight
6%21221222470%
2304
November1st to 15thNight
6%21331334466%
2416
16th to endNight
8%312212235%65%
2535
December1st to 15thNight
11%312212345%61%
2535
16th to endNight
11%5%24312345%54%
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
8%5%13322336%58%
1746
16th to endDay
8%313223235%62%
1885
February1st to 15thDay
9%424212345%59%
1900
16th to endDay
13%7%2331122456%
1710
March1st to 15thDay
12%424323345%53%
2084
16th to endDay
11%5%24323345%53%
2286
April1st to 15thDay
10%322313345%59%
2170
16th to endDay
10%413323346%56%
2347
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
8%3144235%46%55%
1980
October1st to 15thDay
9%312323245%60%
1944
16th to endDay
5%21221223470%
1920
November1st to 15thDay
6%313212336%64%
1771
16th to endDay
8%212212225%66%
1755
December1st to 15thDay
9%6%24313335%55%
1755
16th to endDay
13%5%24313235%52%
1872
January1st to 15thNight
7%312322346%61%
2522
16th to endNight
7%312312235%65%
2702
February1st to 15thNight
10%412212335%60%
2282
16th to endNight
11%413312335%59%
2050
March1st to 15thNight
11%413322335%57%
2204
16th to endNight
8%423313347%57%
2288
April1st to 15thNight
8%323323347%57%
2105
16th to endNight
8%323322337%59%
1726
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
6%31432345%6%56%
1980
October1st to 15thNight
8%312212346%62%
2004
16th to endNight
5%21221222470%
2304
November1st to 15thNight
5%21331334466%
2416
16th to endNight
8%312212245%65%
2535
December1st to 15thNight
11%212212245%61%
2535
16th to endNight
11%5%24312345%55%
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
27%47%23%29%8%
1747
16th to endDay
25%25%21%33%10%
1885
February1st to 15thDay
27%46%23%28%9%
1901
16th to endDay
33%25%17%28%11%
1710
March1st to 15thDay
32%48%21%23%10%
2084
16th to endDay
33%48%24%19%8%
2288
April1st to 15thDay
27%49%24%20%14%
2170
16th to endDay
27%49%21%25%10%
2347
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
28%5%9%22%22%11%
1980
October1st to 15thDay
25%310%22%25%11%
1944
16th to endDay
17%37%20%33%17%
1920
November1st to 15thDay
22%39%25%26%12%
1771
16th to endDay
22%35%21%31%14%
1755
December1st to 15thDay
31%37%23%26%6%
1755
16th to endDay
34%37%23%23%6%
1872
January1st to 15thNight
23%38%19%31%13%
2522
16th to endNight
23%36%17%33%16%
2702
February1st to 15thNight
27%38%20%25%13%
2292
16th to endNight
29%36%20%24%16%
2050
March1st to 15thNight
30%27%17%26%15%
2204
16th to endNight
26%411%25%21%9%
2288
April1st to 15thNight
26%312%18%22%16%
2105
16th to endNight
25%410%20%26%12%
1726
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
27%47%20%25%14%
1980
October1st to 15thNight
23%49%22%22%16%
2004
16th to endNight
18%25%18%32%21%
2304
November1st to 15thNight
20%39%23%25%17%
2416
16th to endNight
23%35%18%33%16%
2535
December1st to 15thNight
25%38%22%27%11%
2535
16th to endNight
31%37%20%25%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
16%8%28%37%7%2
135
16th to endDay
47%40%34%11%2
144
February1st to 15thDay
5%8%40%34%10%
135
16th to endDay
25%5%39%23%5%
120
March1st to 15thDay
11%13%41%24%8%
135
16th to endDay
10%11%38%28%9%2
144
April1st to 15thDay
16%13%34%26%9%
169
16th to endDay
12%11%40%26%7%1
420
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
11%5%29%37%15%
135
October1st to 15thDay
6%14%42%23%11%
135
16th to endDay
7%424%33%25%4
144
November1st to 15thDay
11%6%23%34%20%3
135
16th to endDay
12%14%32%25%11%3
135
December1st to 15thDay
9%437%34%11%1
135
16th to endDay
18%7%36%29%6%
144
January1st to 15thNight
8%7%35%38%9%
975
16th to endNight
8%7%34%39%8%
1038
February1st to 15thNight
13%6%37%35%6%
764
16th to endNight
14%10%42%29%3
684
March1st to 15thNight
13%8%40%32%5%
644
16th to endNight
9%9%45%29%5%
624
April1st to 15thNight
9%12%48%26%3
584
16th to endNight
8%6%47%29%6%
558
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
8%16%43%28%2
537
October1st to 15thNight
9%325%40%20%
564
16th to endNight
6%432%38%16%
768
November1st to 15thNight
7%5%32%37%14%2
896
16th to endNight
10%7%35%32%12%
975
December1st to 15thNight
12%6%33%39%8%
975
16th to endNight
14%6%37%33%7%
1040
Page generated at 2018-04-24 09:03:00. Version ac04

Copyright 2018 A. Danko


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