Lemoore
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lemoore clear sky chart from 2005-11-05 to 2019-06-19.

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
73%
17830
33%
53962
29%
17794
77%
17794
52%
25978

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
65%
836
21%
2869
24%
836
67%
836
29%
1653
January16th to endNight
68%
896
25%
2912
27%
896
69%
896
34%
1650
February1st to 15thNight
68%
819
31%
2533
32%
819
70%
819
39%
1375
February16th to endNight
63%
736
26%
2207
26%
736
67%
736
40%
1218
March1st to 15thNight
66%
840
23%
2466
23%
840
70%
840
41%
1360
March16th to endNight
64%
896
26%
2353
19%
896
69%
896
48%
1317
April1st to 15thNight
55%
839
31%
2099
15%
839
63%
839
48%
1184
April16th to endNight
62%
832
33%
2080
14%
832
70%
832
65%
1014
May1st to 15thNight
69%
759
33%
2019
19%
759
75%
759
69%
925
May16th to endNight
59%
517
33%
1833
23%
517
71%
517
53%
757
June1st to 15thNight
64%
420
40%
1680
36%
420
80%
420
64%
561
June16th to endNight
82%
398
40%
1592
46%
398
88%
398
85%
440
July1st to 15thNight
87%
370
39%
1480
45%
370
92%
370
75%
449
July16th to endNight
90%
551
41%
1676
37%
518
92%
518
71%
644
August1st to 15thNight
88%
729
40%
1875
26%
726
90%
726
83%
806
August16th to endNight
93%
828
45%
2070
29%
828
94%
828
86%
900
September1st to 15thNight
92%
780
48%
1950
35%
780
94%
780
83%
861
September16th to endNight
86%
776
48%
2110
41%
776
91%
776
81%
872
October1st to 15thNight
77%
780
37%
2288
36%
780
83%
780
61%
1031
October16th to endNight
82%
832
42%
2496
44%
832
86%
832
64%
1085
November1st to 15thNight
81%
820
36%
2652
40%
820
83%
820
54%
1188
November16th to endNight
73%
840
28%
2730
30%
840
75%
840
42%
1372
December1st to 15thNight
70%
840
25%
2856
27%
840
73%
840
33%
1582
December16th to endNight
64%
896
24%
3136
26%
896
69%
896
32%
1734

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
4313212335%67%
54761
Night
5%312212235%67%
54146
TransparencyDay
20%27%21%26%21%
54443
Night
19%28%22%26%19%
53963
SeeingDay
6%211%23%33%22%
8180
Night
6%211%38%35%5%
17841

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%7%47%6%3445%7%35%
1728
16th to endDay
13%8%47%5%24447%36%
2016
February1st to 15thDay
13%7%25%42335%6%46%
1988
16th to endDay
11%5%25%42335%6%48%
1839
March1st to 15thDay
7%325%3245%6%7%50%
2151
16th to endDay
8%323424446%56%
2573
April1st to 15thDay
7%413313345%59%
2509
16th to endDay
4112313236%69%
2485
May1st to 15thDay
11212235%76%
2588
16th to endDay
322212235%73%
2983
June1st to 15thDay
111112225%80%
2940
16th to endDay
111290%
2776
July1st to 15thDay
11113285%
2730
16th to endDay
11111122381%
2734
August1st to 15thDay
11289%
2329
16th to endDay
1112287%
2484
September1st to 15thDay
11111287%
2340
16th to endDay
111122383%
2179
October1st to 15thDay
2211211345%74%
1999
16th to endDay
2112212335%73%
2080
November1st to 15thDay
5%32332335%7%59%
1867
16th to endDay
8%42443445%6%51%
1890
December1st to 15thDay
9%8%45%5%3445%6%41%
1761
16th to endDay
11%7%47%42435%7%40%
1792
January1st to 15thNight
11%8%1441335%7%47%
2869
16th to endNight
11%5%2432335%6%50%
2912
February1st to 15thNight
10%414222337%56%
2522
16th to endNight
12%313323346%56%
2207
March1st to 15thNight
6%31442345%8%54%
2466
16th to endNight
7%312313447%58%
2353
April1st to 15thNight
6%32332335%7%60%
2099
16th to endNight
312112226%75%
2080
May1st to 15thNight
211212225%77%
2019
16th to endNight
411221223473%
1832
June1st to 15thNight
1111122481%
1680
16th to endNight
1193%
1592
July1st to 15thNight
111112385%
1560
16th to endNight
11111222480%
1783
August1st to 15thNight
11111189%
1884
16th to endNight
1112288%
2070
September1st to 15thNight
1111288%
1950
16th to endNight
11112386%
2110
October1st to 15thNight
3112212235%73%
2288
16th to endNight
21211233476%
2496
November1st to 15thNight
4212212346%68%
2652
16th to endNight
6%32332235%6%59%
2730
December1st to 15thNight
8%5%25%32345%8%50%
2856
16th to endNight
12%5%2432335%6%51%
3136

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
46%413%19%14%2
1728
16th to endDay
46%413%17%13%4
2016
February1st to 15thDay
39%312%24%17%3
1988
16th to endDay
35%312%31%14%1
1839
March1st to 15thDay
30%416%27%16%3
2151
16th to endDay
29%315%27%20%3
2573
April1st to 15thDay
26%211%30%21%6%
2509
16th to endDay
17%311%29%29%8%
2485
May1st to 15thDay
11%19%28%36%12%
2588
16th to endDay
15%27%30%33%11%
2986
June1st to 15thDay
9%15%19%33%30%
2940
16th to endDay
5%18%31%52%
2776
July1st to 15thDay
6%117%25%58%
2581
16th to endDay
10%1110%25%50%
2578
August1st to 15thDay
5%9%31%51%
2313
16th to endDay
5%18%39%44%
2484
September1st to 15thDay
6%1211%34%43%
2340
16th to endDay
7%1119%43%27%
2179
October1st to 15thDay
13%26%26%29%21%
1999
16th to endDay
14%27%28%29%17%
2080
November1st to 15thDay
24%311%29%26%3
1867
16th to endDay
33%312%27%18%3
1890
December1st to 15thDay
42%6%9%20%17%4
1761
16th to endDay
42%413%23%13%1
1792
January1st to 15thNight
36%412%26%17%3
2869
16th to endNight
33%314%21%18%8%
2912
February1st to 15thNight
29%311%28%21%5%
2533
16th to endNight
30%213%29%20%3
2207
March1st to 15thNight
28%314%27%20%5%
2466
16th to endNight
25%214%29%22%5%
2353
April1st to 15thNight
24%210%32%22%7%
2099
16th to endNight
13%210%31%34%8%
2080
May1st to 15thNight
11%17%26%35%16%
2020
16th to endNight
16%17%24%35%14%
1833
June1st to 15thNight
9%1419%33%31%
1680
16th to endNight
316%28%59%
1592
July1st to 15thNight
6%16%23%62%
1480
16th to endNight
9%119%23%53%
1676
August1st to 15thNight
6%18%26%57%
1875
16th to endNight
418%35%50%
2070
September1st to 15thNight
6%1110%32%48%
1950
16th to endNight
6%117%41%32%
2110
October1st to 15thNight
15%25%23%28%25%
2288
16th to endNight
12%25%26%33%19%
2496
November1st to 15thNight
17%210%30%30%8%
2652
16th to endNight
25%312%26%27%5%
2730
December1st to 15thNight
31%5%12%24%18%7%
2856
16th to endNight
33%315%25%18%3
3136

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
19%14%28%23%13%
176
16th to endDay
15%311%21%31%17%
352
February1st to 15thDay
16%312%23%24%19%
368
16th to endDay
13%417%29%23%11%
342
March1st to 15thDay
11%419%24%25%13%
390
16th to endDay
12%419%25%25%12%
416
April1st to 15thDay
12%7%17%21%27%13%
389
16th to endDay
48%21%21%23%19%
378
May1st to 15thDay
2312%28%32%20%
408
16th to endDay
4315%26%28%20%
458
June1st to 15thDay
1111%22%35%27%
435
16th to endDay
418%42%32%
388
July1st to 15thDay
1315%42%37%
365
16th to endDay
112%45%39%
391
August1st to 15thDay
1422%44%26%
359
16th to endDay
318%43%33%
396
September1st to 15thDay
326%42%25%
375
16th to endDay
19%26%40%20%
375
October1st to 15thDay
1215%34%31%14%
375
16th to endDay
2310%23%35%25%
400
November1st to 15thDay
48%17%39%29%
193
16th to endDay
10%212%25%33%17%
180
December1st to 15thDay
14%36%28%31%15%
143
16th to endDay
12%110%24%33%17%
128
January1st to 15thNight
15%16%35%33%7%
840
16th to endNight
14%18%36%32%6%
896
February1st to 15thNight
12%28%36%31%7%
824
16th to endNight
14%312%40%25%3
736
March1st to 15thNight
8%213%39%30%5%
840
16th to endNight
8%318%40%28%1
896
April1st to 15thNight
7%6%25%38%21%1
839
16th to endNight
35%24%35%27%3
832
May1st to 15thNight
2222%43%27%1
760
16th to endNight
5%5%25%38%24%
518
June1st to 15thNight
3426%43%21%1
420
16th to endNight
1115%55%25%1
398
July1st to 15thNight
8%47%42%
370
16th to endNight
1334%54%5%
551
August1st to 15thNight
16%35%48%6%
729
16th to endNight
330%58%6%
828
September1st to 15thNight
1436%50%6%
780
16th to endNight
119%37%43%6%
776
October1st to 15thNight
4111%39%38%5%
780
16th to endNight
417%30%41%14%
832
November1st to 15thNight
416%35%40%10%
820
16th to endNight
8%18%35%38%8%
840
December1st to 15thNight
11%16%43%31%5%
840
16th to endNight
12%39%43%27%4
896
Page generated at 2019-06-20 05:02:30. Version ac04

Copyright 2019 A. Danko


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