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 2017-09-22.

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%
15524
33%
46929
29%
15488
77%
15488
53%
22468

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
66%
716
20%
2457
23%
716
68%
716
31%
1370
January16th to endNight
68%
768
26%
2496
29%
768
69%
768
35%
1405
February1st to 15thNight
67%
699
28%
2165
29%
699
70%
699
38%
1183
February16th to endNight
62%
632
27%
1895
27%
632
66%
632
40%
1050
March1st to 15thNight
69%
720
24%
2114
23%
720
73%
720
45%
1115
March16th to endNight
64%
768
27%
2017
20%
768
70%
768
50%
1105
April1st to 15thNight
55%
719
31%
1799
15%
719
62%
719
49%
1008
April16th to endNight
61%
720
33%
1800
14%
720
69%
720
63%
883
May1st to 15thNight
68%
650
32%
1730
18%
650
73%
650
69%
794
May16th to endNight
61%
441
35%
1565
25%
441
73%
441
57%
619
June1st to 15thNight
61%
360
37%
1440
32%
360
77%
360
61%
496
June16th to endNight
80%
360
42%
1440
47%
360
88%
360
85%
400
July1st to 15thNight
87%
340
38%
1360
43%
340
92%
340
77%
406
July16th to endNight
90%
508
42%
1537
38%
475
93%
475
72%
586
August1st to 15thNight
88%
684
39%
1758
25%
681
90%
681
83%
759
August16th to endNight
93%
764
47%
1910
30%
764
94%
764
86%
831
September1st to 15thNight
91%
720
45%
1800
33%
720
93%
720
82%
801
September16th to endNight
85%
683
48%
1858
41%
683
90%
683
79%
778
October1st to 15thNight
76%
660
35%
1936
34%
660
81%
660
57%
898
October16th to endNight
81%
704
41%
2112
43%
704
85%
704
61%
938
November1st to 15thNight
80%
700
34%
2264
38%
700
82%
700
54%
1019
November16th to endNight
73%
720
29%
2340
30%
720
76%
720
44%
1152
December1st to 15thNight
69%
720
25%
2448
26%
720
72%
720
32%
1371
December16th to endNight
63%
768
24%
2688
25%
768
68%
768
31%
1501

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
4312212235%68%
47957
Night
5%312212235%68%
47113
TransparencyDay
19%27%21%26%21%
47639
Night
19%28%22%26%19%
46930
SeeingDay
5%311%24%33%21%
5931
Night
6%212%37%35%5%
15535

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%7%47%7%3445%7%38%
1480
16th to endDay
14%8%47%424447%38%
1728
February1st to 15thDay
13%7%24423246%46%
1697
16th to endDay
12%5%25%42335%6%47%
1579
March1st to 15thDay
6%325%3246%6%7%51%
1844
16th to endDay
7%323424446%56%
2205
April1st to 15thDay
8%413213345%61%
2149
16th to endDay
5%112313236%67%
2160
May1st to 15thDay
11212235%77%
2217
16th to endDay
21121223477%
2547
June1st to 15thDay
11111223479%
2520
16th to endDay
111289%
2520
July1st to 15thDay
111113285%
2520
16th to endDay
11111122381%
2522
August1st to 15thDay
1111289%
2193
16th to endDay
111111288%
2292
September1st to 15thDay
11111286%
2160
16th to endDay
111122382%
1913
October1st to 15thDay
2212211346%71%
1691
16th to endDay
2212212345%70%
1760
November1st to 15thDay
6%423323347%58%
1595
16th to endDay
7%42443435%6%52%
1620
December1st to 15thDay
10%8%35%5%3445%6%41%
1509
16th to endDay
12%7%37%42435%6%41%
1536
January1st to 15thNight
10%8%1431335%6%50%
2457
16th to endNight
12%5%24422346%51%
2496
February1st to 15thNight
10%5%14312347%55%
2154
16th to endNight
12%413323345%55%
1895
March1st to 15thNight
5%313323447%58%
2114
16th to endNight
7%312313448%59%
2017
April1st to 15thNight
6%323323347%61%
1799
16th to endNight
3112112226%74%
1800
May1st to 15thNight
211212226%77%
1730
16th to endNight
3122123477%
1564
June1st to 15thNight
2111122480%
1440
16th to endNight
1193%
1440
July1st to 15thNight
111112385%
1440
16th to endNight
1111222382%
1644
August1st to 15thNight
11111189%
1767
16th to endNight
11112388%
1910
September1st to 15thNight
111112287%
1800
16th to endNight
1111112385%
1858
October1st to 15thNight
3112212236%69%
1936
16th to endNight
2122233474%
2112
November1st to 15thNight
4212212246%68%
2264
16th to endNight
5%323322346%61%
2340
December1st to 15thNight
9%5%25%323447%51%
2448
16th to endNight
13%5%23323346%51%
2688

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
44%312%20%15%2
1480
16th to endDay
46%411%16%14%5%
1728
February1st to 15thDay
39%313%23%17%2
1697
16th to endDay
36%312%33%12%1
1579
March1st to 15thDay
28%417%27%18%4
1844
16th to endDay
28%316%27%20%4
2205
April1st to 15thDay
25%211%32%21%6%
2149
16th to endDay
18%312%28%28%9%
2160
May1st to 15thDay
10%18%26%38%13%
2217
16th to endDay
12%16%30%36%12%
2550
June1st to 15thDay
10%25%19%32%30%
2520
16th to endDay
5%17%32%52%
2520
July1st to 15thDay
6%117%23%60%
2371
16th to endDay
10%119%24%52%
2366
August1st to 15thDay
5%9%31%51%
2177
16th to endDay
5%18%39%45%
2292
September1st to 15thDay
7%1212%33%42%
2160
16th to endDay
7%1120%44%24%
1913
October1st to 15thDay
15%27%27%29%18%
1691
16th to endDay
15%27%29%27%15%
1760
November1st to 15thDay
25%312%29%26%2
1595
16th to endDay
31%311%28%19%4
1620
December1st to 15thDay
41%6%10%22%16%2
1509
16th to endDay
42%414%22%14%1
1536
January1st to 15thNight
34%312%25%19%4
2457
16th to endNight
33%213%20%20%9%
2496
February1st to 15thNight
30%212%28%20%5%
2165
16th to endNight
30%113%30%20%2
1895
March1st to 15thNight
24%315%28%22%5%
2114
16th to endNight
23%216%28%22%5%
2017
April1st to 15thNight
24%210%33%21%7%
1799
16th to endNight
13%211%29%32%9%
1800
May1st to 15thNight
11%17%25%35%18%
1731
16th to endNight
14%16%23%38%16%
1565
June1st to 15thNight
11%1420%30%31%
1440
16th to endNight
316%27%60%
1440
July1st to 15thNight
5%116%23%62%
1360
16th to endNight
9%18%22%56%
1537
August1st to 15thNight
6%18%26%56%
1758
16th to endNight
47%34%51%
1910
September1st to 15thNight
6%1111%31%47%
1800
16th to endNight
6%1119%42%29%
1858
October1st to 15thNight
16%26%25%28%20%
1936
16th to endNight
13%26%26%33%16%
2112
November1st to 15thNight
18%210%30%32%5%
2264
16th to endNight
24%211%26%28%5%
2340
December1st to 15thNight
32%5%12%25%17%6%
2448
16th to endNight
34%315%24%18%3
2688

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%18%29%18%13%
108
16th to endDay
16%312%21%27%19%
256
February1st to 15thDay
17%310%23%24%21%
257
16th to endDay
13%5%15%30%21%13%
238
March1st to 15thDay
8%418%24%27%16%
270
16th to endDay
10%5%20%25%25%12%
288
April1st to 15thDay
14%7%20%21%22%13%
269
16th to endDay
5%11%24%23%21%13%
270
May1st to 15thDay
2414%28%28%20%
288
16th to endDay
3414%26%29%21%
330
June1st to 15thDay
1214%26%35%19%
315
16th to endDay
6%19%41%31%
315
July1st to 15thDay
1315%43%36%
305
16th to endDay
114%45%36%
327
August1st to 15thDay
2423%45%23%
315
16th to endDay
320%42%31%
332
September1st to 15thDay
326%43%24%
315
16th to endDay
1211%25%41%18%
280
October1st to 15thDay
2214%32%31%16%
255
16th to endDay
2313%28%34%17%
272
November1st to 15thDay
5%7%11%30%43%
101
16th to endDay
6%312%35%32%10%
90
December1st to 15thDay
16%47%25%39%7%
71
16th to endDay
17%19%28%28%15%
64
January1st to 15thNight
15%16%33%34%8%
720
16th to endNight
15%17%36%31%6%
768
February1st to 15thNight
13%27%36%33%6%
704
16th to endNight
14%313%39%25%4
632
March1st to 15thNight
7%212%39%32%5%
720
16th to endNight
8%218%39%28%1
768
April1st to 15thNight
7%5%26%38%20%2
719
16th to endNight
45%24%36%27%2
720
May1st to 15thNight
3223%41%27%1
651
16th to endNight
5%5%24%38%24%
442
June1st to 15thNight
35%28%44%17%
360
16th to endNight
1116%55%23%1
360
July1st to 15thNight
8%47%42%
340
16th to endNight
1334%54%5%
508
August1st to 15thNight
17%37%48%5%
684
16th to endNight
330%58%6%
764
September1st to 15thNight
1435%50%7%
720
16th to endNight
119%36%43%7%
683
October1st to 15thNight
4111%36%39%5%
660
16th to endNight
418%32%40%12%
704
November1st to 15thNight
5%17%34%40%11%
700
16th to endNight
7%18%36%36%8%
720
December1st to 15thNight
11%16%43%31%5%
720
16th to endNight
13%310%42%26%3
768
Page generated at 2017-09-23 03:43:35. Version ac04

Copyright 2017 A. Danko


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