Muleshoe NWR
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Muleshoe NWR clear sky chart from 2005-11-05 to 2017-09-23.

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
54%
15674
33%
46702
21%
15632
66%
15632
47%
23682

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
48%
882
34%
2313
16%
880
60%
880
51%
1230
January16th to endNight
47%
768
41%
2304
22%
768
65%
768
51%
1111
February1st to 15thNight
42%
702
32%
2112
18%
700
55%
700
42%
1097
February16th to endNight
38%
632
37%
1894
14%
632
58%
632
46%
944
March1st to 15thNight
41%
720
33%
2160
16%
720
55%
720
43%
1105
March16th to endNight
40%
605
34%
2018
18%
605
58%
605
44%
951
April1st to 15thNight
35%
539
33%
1798
16%
539
55%
539
42%
848
April16th to endNight
36%
540
34%
1800
18%
540
61%
540
50%
797
May1st to 15thNight
42%
540
29%
1682
19%
540
59%
540
45%
848
May16th to endNight
52%
563
28%
1684
20%
561
66%
561
45%
885
June1st to 15thNight
55%
540
23%
1608
16%
540
64%
540
49%
801
June16th to endNight
68%
540
28%
1440
22%
540
73%
540
58%
730
July1st to 15thNight
76%
510
25%
1369
22%
510
79%
510
49%
756
July16th to endNight
84%
564
26%
1671
30%
531
84%
531
47%
837
August1st to 15thNight
82%
539
27%
1789
35%
536
82%
536
40%
928
August16th to endNight
78%
573
24%
1910
29%
573
78%
573
37%
1031
September1st to 15thNight
72%
540
25%
1842
26%
540
75%
540
32%
1030
September16th to endNight
67%
516
35%
1903
33%
516
75%
516
42%
908
October1st to 15thNight
58%
495
38%
1815
29%
495
72%
495
44%
837
October16th to endNight
64%
731
39%
2139
24%
731
73%
731
58%
993
November1st to 15thNight
62%
875
38%
2275
18%
875
72%
875
64%
1098
November16th to endNight
55%
900
38%
2340
19%
900
65%
900
55%
1213
December1st to 15thNight
45%
900
37%
2340
16%
900
59%
900
50%
1271
December16th to endNight
41%
960
35%
2496
15%
960
54%
960
43%
1433

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
5%313323346%61%
48127
Night
5%312323346%63%
46896
Cloud CoverDay
5%313323346%61%
48125
Night
5%313323346%63%
46896
TransparencyDay
23%48%21%26%15%
47824
Night
21%38%19%27%18%
46703
SeeingDay
7%421%33%26%7%
5600
Night
6%5%30%40%17%
15679

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
5%413212236%65%
1567
16th to endDay
4313323245%64%
1920
February1st to 15thDay
5%42321222466%
1750
16th to endDay
46%23223335%62%
1580
March1st to 15thDay
6%312322347%61%
1800
16th to endDay
442221333466%
2203
April1st to 15thDay
6%312213436%64%
2150
16th to endDay
322112245%71%
2160
May1st to 15thDay
9%313224336%59%
2268
16th to endDay
6%212323347%61%
2430
June1st to 15thDay
332332345%7%60%
2346
16th to endDay
321232445%9%60%
2520
July1st to 15thDay
7%313435%46%9%50%
2507
16th to endDay
3213335%5%5%8%57%
2378
August1st to 15thDay
3213325%5%6%10%54%
2160
16th to endDay
5%5%245%35%45%8%49%
2292
September1st to 15thDay
9%4245%35%45%7%47%
2118
16th to endDay
7%313323345%61%
1893
October1st to 15thDay
8%41322223463%
1815
16th to endDay
221221222475%
1719
November1st to 15thDay
311121343471%
1583
16th to endDay
6%21221224469%
1620
December1st to 15thDay
7%412312346%61%
1620
16th to endDay
6%5%14323446%58%
1728
January1st to 15thNight
5%33213345%65%
2313
16th to endNight
4311213345%67%
2304
February1st to 15thNight
6%413223245%63%
2102
16th to endNight
6%312213345%63%
1894
March1st to 15thNight
5%323323346%62%
2160
16th to endNight
5%312223236%64%
2018
April1st to 15thNight
5%322222345%64%
1798
16th to endNight
5%21213346%68%
1800
May1st to 15thNight
6%223223345%64%
1681
16th to endNight
6%212313447%61%
1683
June1st to 15thNight
2222245%6%10%59%
1608
16th to endNight
11232335%9%65%
1440
July1st to 15thNight
421332447%9%57%
1449
16th to endNight
221332447%10%58%
1786
August1st to 15thNight
42125%245%6%10%53%
1800
16th to endNight
42235%345%6%10%50%
1910
September1st to 15thNight
8%42342445%8%50%
1842
16th to endNight
6%313323345%62%
1903
October1st to 15thNight
6%31321233467%
1815
16th to endNight
41221223473%
2139
November1st to 15thNight
212212336%72%
2275
16th to endNight
431221333468%
2340
December1st to 15thNight
6%5%13212246%63%
2340
16th to endNight
7%424213345%58%
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
5%413222226%65%
1567
16th to endDay
4313322335%65%
1920
February1st to 15thDay
5%41321223466%
1750
16th to endDay
45%33223236%62%
1580
March1st to 15thDay
7%31322335%7%60%
1800
16th to endDay
442222233466%
2201
April1st to 15thDay
6%311223436%64%
2150
16th to endDay
421113346%70%
2160
May1st to 15thDay
9%313224346%59%
2268
16th to endDay
6%31222335%6%61%
2430
June1st to 15thDay
421332345%7%60%
2346
16th to endDay
321232446%8%61%
2520
July1st to 15thDay
7%31343446%8%51%
2507
16th to endDay
3213335%5%5%8%56%
2378
August1st to 15thDay
3223446%6%10%55%
2160
16th to endDay
5%425%425%45%8%50%
2292
September1st to 15thDay
10%4245%3445%7%47%
2118
16th to endDay
7%413313335%62%
1893
October1st to 15thDay
8%41331223463%
1815
16th to endDay
321221222474%
1719
November1st to 15thDay
311221233472%
1583
16th to endDay
6%31211223469%
1620
December1st to 15thDay
7%41232347%61%
1620
16th to endDay
6%5%23323446%58%
1728
January1st to 15thNight
5%313213445%65%
2313
16th to endNight
4212213335%67%
2304
February1st to 15thNight
6%413213245%63%
2102
16th to endNight
6%3221335%5%64%
1894
March1st to 15thNight
5%313323337%62%
2160
16th to endNight
5%312213336%64%
2018
April1st to 15thNight
5%313312236%65%
1798
16th to endNight
5%111213336%68%
1800
May1st to 15thNight
6%313213345%64%
1681
16th to endNight
6%212323347%62%
1683
June1st to 15thNight
21222446%10%59%
1608
16th to endNight
12222345%9%64%
1440
July1st to 15thNight
42122235%6%10%57%
1449
16th to endNight
321232446%11%57%
1786
August1st to 15thNight
42135%35%47%10%52%
1800
16th to endNight
43145%345%6%10%50%
1910
September1st to 15thNight
8%423435%45%8%50%
1842
16th to endNight
5%313313345%63%
1903
October1st to 15thNight
6%31321133467%
1815
16th to endNight
41121223473%
2139
November1st to 15thNight
212212336%72%
2275
16th to endNight
431221233468%
2340
December1st to 15thNight
6%413212335%63%
2340
16th to endNight
8%413313345%59%
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
22%18%25%26%15%
1568
16th to endDay
22%16%19%34%15%
1920
February1st to 15thDay
23%26%20%26%20%
1751
16th to endDay
24%2314%36%18%
1580
March1st to 15thDay
22%25%17%33%17%
1800
16th to endDay
21%26%21%27%20%
2203
April1st to 15thDay
21%45%14%30%23%
2150
16th to endDay
16%27%20%29%24%
2160
May1st to 15thDay
26%37%17%23%22%
2268
16th to endDay
22%49%17%22%22%
2434
June1st to 15thDay
22%411%22%20%18%
2346
16th to endDay
20%6%11%23%20%17%
2520
July1st to 15thDay
29%6%12%24%20%7%
2359
16th to endDay
22%7%15%31%21%2
2230
August1st to 15thDay
22%7%17%26%19%4
2147
16th to endDay
30%6%14%22%19%5%
2292
September1st to 15thDay
36%6%12%20%17%7%
2118
16th to endDay
25%45%20%29%14%
1893
October1st to 15thDay
25%28%19%28%16%
1815
16th to endDay
15%2320%36%22%
1719
November1st to 15thDay
15%45%19%36%19%
1583
16th to endDay
19%1416%32%26%
1620
December1st to 15thDay
23%28%25%30%9%
1620
16th to endDay
26%37%24%27%10%
1728
January1st to 15thNight
21%27%21%29%16%
2313
16th to endNight
19%25%17%34%20%
2304
February1st to 15thNight
25%25%17%26%23%
2112
16th to endNight
22%2415%30%24%
1894
March1st to 15thNight
23%35%17%29%21%
2160
16th to endNight
21%27%21%24%21%
2018
April1st to 15thNight
21%39%15%26%24%
1798
16th to endNight
17%38%18%27%25%
1800
May1st to 15thNight
22%310%13%25%24%
1682
16th to endNight
21%6%10%16%20%24%
1685
June1st to 15thNight
18%6%13%20%20%19%
1608
16th to endNight
16%417%24%18%18%
1440
July1st to 15thNight
21%6%15%26%22%7%
1369
16th to endNight
19%7%16%28%25%3
1671
August1st to 15thNight
24%6%15%24%22%6%
1789
16th to endNight
26%7%14%25%19%5%
1910
September1st to 15thNight
31%5%13%23%15%9%
1842
16th to endNight
23%48%19%29%14%
1903
October1st to 15thNight
21%48%20%26%18%
1815
16th to endNight
15%2316%36%24%
2139
November1st to 15thNight
13%26%18%35%22%
2275
16th to endNight
19%2414%35%23%
2340
December1st to 15thNight
23%25%22%30%15%
2340
16th to endNight
27%25%19%31%12%
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%232%23%15%5%
90
16th to endDay
313%32%36%10%4
96
February1st to 15thDay
10%227%33%24%2
90
16th to endDay
12%338%28%13%3
81
March1st to 15thDay
3433%35%21%2
90
16th to endDay
413%30%33%14%3
217
April1st to 15thDay
9%18%36%24%10%
269
16th to endDay
414%40%31%5%2
270
May1st to 15thDay
7%9%38%34%9%
405
16th to endDay
9%329%35%19%2
517
June1st to 15thDay
5%123%43%23%2
495
16th to endDay
3113%36%36%10%
495
July1st to 15thDay
7%5%33%41%12%
475
16th to endDay
3226%48%16%
427
August1st to 15thDay
5%427%46%16%
315
16th to endDay
8%7%29%39%14%
332
September1st to 15thDay
5%19%41%28%14%
273
16th to endDay
10%19%28%40%8%
111
October1st to 15thDay
20%114%46%12%5%
90
16th to endDay
6%17%38%28%9%
96
November1st to 15thDay
12%5%21%25%18%16%
90
16th to endDay
11%14%33%22%13%5%
90
December1st to 15thDay
10%344%26%11%4
90
16th to endDay
11%15%43%23%5%
96
January1st to 15thNight
7%6%34%39%11%1
885
16th to endNight
5%5%39%37%11%
768
February1st to 15thNight
7%7%39%35%8%
704
16th to endNight
9%7%41%36%4
632
March1st to 15thNight
6%9%39%36%8%
720
16th to endNight
6%9%40%36%6%
605
April1st to 15thNight
5%12%45%32%3
539
16th to endNight
47%50%33%4
540
May1st to 15thNight
6%7%42%37%6%
540
16th to endNight
6%235%39%14%
563
June1st to 15thNight
3235%48%10%
540
16th to endNight
224%50%21%
540
July1st to 15thNight
410%51%31%1
510
16th to endNight
3343%45%2
564
August1st to 15thNight
31438%50%1
539
16th to endNight
5%7%43%41%1
573
September1st to 15thNight
8%19%44%34%1
540
16th to endNight
6%118%47%25%1
516
October1st to 15thNight
7%229%44%15%
495
16th to endNight
5%324%40%24%2
731
November1st to 15thNight
3426%44%19%
875
16th to endNight
7%5%28%39%19%
900
December1st to 15thNight
9%5%36%37%11%
900
16th to endNight
10%8%35%34%8%
960
Page generated at 2017-09-24 08:15:46. Version ac04

Copyright 2017 A. Danko


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