Muleshoe NWR
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Muleshoe NWR clear sky chart from 2005-11-06 to 2024-11-25.

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 Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(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

By Month

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 Forecast	Data Points
Cloud Cover	Day	6% 4 1 4 3 3 3 3 5% 6% 63%	105618
	Night	5% 4 1 4 3 3 3 3 5% 7% 63%	102372
Transparency	Day	22% 4 8% 20% 27% 18%	105381
	Night	21% 4 8% 19% 28% 20%	102200
Seeing	Day	7% 6% 23% 32% 24% 7%	15212
	Night	6% 6% 32% 40% 15% 1	25218

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
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	8% 9% 2 5% 3 2 2 2 4 5% 58%	2680
	11th to 20th	Day	3 3 1 2 2 2 2 2 4 6% 73%	3077
	21st to end	Day	7% 6% 2 5% 4 3 4 3 5% 6% 54%	3487
February	1st to 10th	Day	4 6% 2 5% 3 3 3 2 5% 5% 64%	1900
	11th to 20th	Day	6% 6% 2 5% 4 2 3 2 4 5% 60%	1849
	21st to end	Day	2 6% 3 5% 3 2 3 3 5% 6% 62%	1570
March	1st to 10th	Day	4 3 1 3 3 2 3 3 5% 6% 66%	3130
	11th to 20th	Day	12% 5% 2 4 3 3 3 3 4 6% 56%	3253
	21st to end	Day	3 5% 2 5% 5% 4 4 4 5% 7% 57%	4147
April	1st to 10th	Day	4 3 1 2 3 2 3 3 4 6% 69%	2280
	11th to 20th	Day	7% 5% 2 4 2 2 3 2 3 5% 64%	2251
	21st to end	Day	4 3 1 2 2 2 3 3 6% 6% 68%	2280
May	1st to 10th	Day	6% 4 1 3 2 2 2 2 4 5% 69%	3955
	11th to 20th	Day	11% 3 1 3 2 3 3 3 4 6% 59%	4082
	21st to end	Day	7% 3 1 3 3 3 3 3 4 5% 66%	4489
June	1st to 10th	Day	5% 3 2 4 3 3 3 3 6% 9% 59%	2470
	11th to 20th	Day	3 3 1 3 3 3 3 3 6% 8% 65%	2575
	21st to end	Day	4 3 1 2 3 3 5% 4 6% 9% 60%	2660
July	1st to 10th	Day	7% 4 2 6% 5% 5% 5% 5% 6% 8% 48%	4430
	11th to 20th	Day	5% 3 1 4 3 4 4 3 5% 8% 60%	4244
	21st to end	Day	4 3 1 4 4 4 4 4 6% 11% 54%	4225
August	1st to 10th	Day	2 1 1 2 2 3 3 3 5% 9% 68%	3784
	11th to 20th	Day	3 3 1 3 3 3 4 3 5% 7% 66%	3726
	21st to end	Day	4 4 1 4 3 4 4 3 5% 8% 59%	4180
September	1st to 10th	Day	7% 5% 2 4 4 4 5% 3 5% 7% 54%	2280
	11th to 20th	Day	9% 6% 2 6% 4 4 4 3 5% 8% 50%	2118
	21st to end	Day	7% 3 1 3 3 3 3 2 3 4 66%	2090
October	1st to 10th	Day	5% 2 1 3 1 1 2 1 3 4 76%	3480
	11th to 20th	Day	12% 4 1 2 2 2 2 2 3 4 65%	3320
	21st to end	Day	4 3 1 2 1 2 2 2 3 5% 75%	3291
November	1st to 10th	Day	5% 3 1 3 2 2 3 2 4 5% 69%	1763
	11th to 20th	Day	2 3 1 3 2 2 3 3 4 6% 70%	1800
	21st to end	Day	8% 6% 2 3 2 3 3 2 4 5% 64%	1746
December	1st to 10th	Day	7% 4 2 4 3 3 4 3 4 5% 61%	1710
	11th to 20th	Day	5% 4 1 5% 4 4 3 3 5% 7% 58%	2161
	21st to end	Day	5% 5% 1 4 3 3 2 2 3 4 68%	3135
January	1st to 10th	Night	3 5% 2 5% 3 3 4 3 5% 6% 61%	4109
	11th to 20th	Night	3 3 1 3 2 2 3 2 5% 7% 69%	3923
	21st to end	Night	5% 5% 3 4 3 3 4 4 6% 7% 57%	4180
February	1st to 10th	Night	5% 5% 2 5% 3 3 3 2 5% 5% 63%	2280
	11th to 20th	Night	7% 4 2 4 3 3 3 2 5% 6% 61%	2218
	21st to end	Night	5% 4 1 3 3 3 4 3 4 6% 64%	1884
March	1st to 10th	Night	3 5% 2 4 2 3 2 2 4 5% 68%	3734
	11th to 20th	Night	9% 5% 2 4 3 3 3 3 4 7% 57%	3712
	21st to end	Night	3 5% 1 4 4 4 3 3 5% 6% 61%	3491
April	1st to 10th	Night	4 4 1 2 2 2 3 3 5% 6% 67%	1900
	11th to 20th	Night	6% 4 1 3 2 4 3 3 5% 6% 63%	1877
	21st to end	Night	5% 2 1 2 2 2 3 4 5% 5% 68%	1900
May	1st to 10th	Night	7% 4 1 3 2 2 2 2 3 5% 70%	3014
	11th to 20th	Night	8% 4 1 3 2 3 3 3 4 5% 62%	2823
	21st to end	Night	6% 3 1 3 2 2 3 3 4 6% 68%	3098
June	1st to 10th	Night	4 3 1 4 3 3 4 5% 8% 10% 55%	1710
	11th to 20th	Night	2 2 1 3 3 3 3 4 6% 9% 66%	1596
	21st to end	Night	2 3 1 4 3 3 3 3 5% 10% 61%	1520
July	1st to 10th	Night	4 4 2 4 3 4 4 5% 6% 9% 56%	2540
	11th to 20th	Night	3 3 1 5% 4 4 5% 5% 7% 10% 54%	2721
	21st to end	Night	3 3 1 4 3 4 4 4 8% 15% 52%	3333
August	1st to 10th	Night	3 2 1 3 4 3 4 4 7% 14% 55%	3155
	11th to 20th	Night	3 3 1 3 4 3 3 3 6% 9% 62%	3113
	21st to end	Night	4 3 2 4 4 4 4 4 8% 11% 54%	3487
September	1st to 10th	Night	6% 4 2 5% 3 5% 4 3 6% 7% 55%	1900
	11th to 20th	Night	8% 3 2 5% 4 4 4 3 5% 7% 56%	2061
	21st to end	Night	7% 3 1 4 2 2 3 2 4 5% 67%	2090
October	1st to 10th	Night	4 2 1 2 2 2 2 2 3 4 77%	3480
	11th to 20th	Night	13% 3 1 3 2 2 2 2 3 5% 65%	3586
	21st to end	Night	6% 2 1 2 2 2 2 1 3 5% 74%	4235
November	1st to 10th	Night	5% 3 1 2 1 2 2 3 4 6% 72%	2535
	11th to 20th	Night	2 3 1 3 2 3 2 2 4 7% 72%	2600
	21st to end	Night	7% 4 1 3 2 2 3 3 4 6% 63%	2529
December	1st to 10th	Night	6% 5% 1 4 2 2 3 2 4 7% 62%	2470
	11th to 20th	Night	5% 4 2 5% 3 3 3 3 6% 6% 60%	3036
	21st to end	Night	5% 4 2 4 3 3 3 2 4 6% 64%	4532

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	30% 2 6% 19% 29% 14%	2681
	11th to 20th	Day	14% 2 8% 26% 36% 14%	3077
	21st to end	Day	30% 4 7% 18% 30% 10%	3487
February	1st to 10th	Day	23% 3 7% 20% 27% 20%	1900
	11th to 20th	Day	27% 3 5% 18% 27% 20%	1859
	21st to end	Day	24% 3 3 12% 35% 23%	1570
March	1st to 10th	Day	19% 3 4 11% 34% 29%	3130
	11th to 20th	Day	28% 4 7% 20% 28% 12%	3253
	21st to end	Day	23% 6% 7% 17% 28% 19%	4147
April	1st to 10th	Day	17% 4 5% 14% 31% 28%	2280
	11th to 20th	Day	24% 3 5% 17% 25% 26%	2254
	21st to end	Day	17% 3 7% 21% 30% 21%	2280
May	1st to 10th	Day	18% 3 8% 15% 22% 34%	3955
	11th to 20th	Day	25% 5% 9% 17% 22% 22%	4086
	21st to end	Day	20% 5% 8% 14% 19% 35%	4489
June	1st to 10th	Day	21% 5% 14% 27% 20% 13%	2470
	11th to 20th	Day	17% 5% 8% 20% 26% 24%	2575
	21st to end	Day	20% 6% 11% 25% 24% 15%	2660
July	1st to 10th	Day	31% 7% 12% 23% 19% 7%	4361
	11th to 20th	Day	20% 6% 13% 31% 25% 6%	4171
	21st to end	Day	22% 7% 12% 29% 26% 4	4091
August	1st to 10th	Day	14% 6% 12% 29% 27% 12%	3772
	11th to 20th	Day	17% 5% 12% 21% 32% 14%	3762
	21st to end	Day	23% 5% 14% 27% 25% 6%	4179
September	1st to 10th	Day	28% 7% 12% 18% 21% 13%	2280
	11th to 20th	Day	32% 6% 8% 20% 26% 9%	2118
	21st to end	Day	22% 4 6% 19% 32% 16%	2090
October	1st to 10th	Day	14% 2 5% 12% 32% 35%	3480
	11th to 20th	Day	24% 3 7% 13% 27% 25%	3320
	21st to end	Day	14% 2 3 21% 32% 28%	3291
November	1st to 10th	Day	18% 4 6% 16% 35% 21%	1763
	11th to 20th	Day	17% 3 5% 22% 35% 19%	1800
	21st to end	Day	24% 2 5% 15% 31% 24%	1746
December	1st to 10th	Day	24% 3 6% 23% 30% 12%	1710
	11th to 20th	Day	25% 3 7% 21% 27% 17%	2159
	21st to end	Day	21% 2 6% 20% 32% 18%	3135
January	1st to 10th	Night	23% 5% 6% 22% 34% 11%	4109
	11th to 20th	Night	15% 4 12% 19% 38% 12%	3923
	21st to end	Night	25% 4 9% 21% 30% 11%	4180
February	1st to 10th	Night	24% 3 5% 17% 28% 23%	2280
	11th to 20th	Night	26% 3 5% 18% 27% 22%	2218
	21st to end	Night	21% 3 5% 14% 28% 29%	1884
March	1st to 10th	Night	19% 4 5% 12% 26% 35%	3734
	11th to 20th	Night	27% 4 8% 21% 23% 17%	3712
	21st to end	Night	21% 5% 8% 20% 25% 21%	3491
April	1st to 10th	Night	18% 3 7% 16% 27% 29%	1900
	11th to 20th	Night	21% 5% 8% 16% 25% 26%	1877
	21st to end	Night	17% 4 9% 20% 28% 22%	1900
May	1st to 10th	Night	19% 3 8% 15% 20% 35%	3014
	11th to 20th	Night	23% 5% 11% 17% 19% 25%	2824
	21st to end	Night	18% 5% 10% 12% 13% 42%	3099
June	1st to 10th	Night	20% 8% 15% 25% 18% 14%	1710
	11th to 20th	Night	14% 5% 12% 19% 26% 24%	1596
	21st to end	Night	19% 5% 15% 24% 21% 16%	1520
July	1st to 10th	Night	24% 7% 14% 31% 21% 4	2500
	11th to 20th	Night	23% 6% 12% 23% 30% 6%	2672
	21st to end	Night	19% 7% 13% 29% 27% 4	3228
August	1st to 10th	Night	18% 6% 13% 27% 25% 12%	3144
	11th to 20th	Night	18% 6% 9% 25% 33% 9%	3143
	21st to end	Night	22% 6% 16% 26% 24% 7%	3487
September	1st to 10th	Night	27% 7% 11% 20% 22% 14%	1900
	11th to 20th	Night	27% 5% 12% 21% 24% 10%	2061
	21st to end	Night	21% 4 7% 19% 31% 19%	2090
October	1st to 10th	Night	13% 4 6% 11% 28% 39%	3480
	11th to 20th	Night	24% 2 5% 16% 26% 25%	3586
	21st to end	Night	16% 2 3 17% 35% 28%	4235
November	1st to 10th	Night	15% 2 6% 19% 32% 25%	2535
	11th to 20th	Night	14% 3 5% 18% 38% 21%	2600
	21st to end	Night	22% 3 5% 16% 35% 19%	2529
December	1st to 10th	Night	23% 3 6% 22% 28% 18%	2470
	11th to 20th	Night	24% 3 5% 18% 31% 17%	3037
	21st to end	Night	22% 3 5% 18% 34% 17%	4532

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
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	10% 12% 33% 31% 11% 3	270
	11th to 20th	Day	9% 12% 32% 35% 10% 1	270
	21st to end	Day	7% 10% 35% 33% 14% 2	297
February	1st to 10th	Day	7% 9% 41% 32% 11%	270
	11th to 20th	Day	11% 11% 37% 30% 9% 2	270
	21st to end	Day	9% 10% 49% 25% 6%	225
March	1st to 10th	Day	6% 6% 41% 34% 13%	270
	11th to 20th	Day	14% 9% 32% 29% 13% 3	270
	21st to end	Day	8% 16% 38% 29% 9% 1	488
April	1st to 10th	Day	8% 12% 41% 30% 9%	460
	11th to 20th	Day	9% 11% 45% 27% 6% 1	452
	21st to end	Day	6% 12% 33% 34% 13% 1	460
May	1st to 10th	Day	6% 9% 38% 34% 13% 1	553
	11th to 20th	Day	9% 7% 28% 32% 20% 4	675
	21st to end	Day	8% 6% 29% 36% 19% 2	734
June	1st to 10th	Day	6% 3 21% 42% 24% 4	680
	11th to 20th	Day	3 2 21% 47% 23% 5%	680
	21st to end	Day	4 1 12% 39% 37% 7%	680
July	1st to 10th	Day	5% 1 8% 30% 40% 16%	671
	11th to 20th	Day	3 4 30% 48% 15%	668
	21st to end	Day	2 1 5% 25% 45% 23%	599
August	1st to 10th	Day	3 7% 27% 46% 17%	487
	11th to 20th	Day	5% 1 6% 27% 42% 20%	477
	21st to end	Day	6% 1 6% 26% 41% 20%	539
September	1st to 10th	Day	7% 2 7% 34% 37% 14%	490
	11th to 20th	Day	5% 9% 32% 39% 15%	328
	21st to end	Day	11% 3 11% 28% 34% 12%	300
October	1st to 10th	Day	14% 2 15% 35% 24% 9%	300
	11th to 20th	Day	10% 3 19% 39% 22% 8%	300
	21st to end	Day	10% 5% 24% 31% 22% 8%	330
November	1st to 10th	Day	11% 8% 31% 29% 17% 4	300
	11th to 20th	Day	3 11% 26% 36% 19% 5%	300
	21st to end	Day	13% 13% 34% 20% 16% 4	282
December	1st to 10th	Day	10% 7% 36% 31% 12% 4	270
	11th to 20th	Day	6% 9% 33% 44% 8%	270
	21st to end	Day	8% 9% 44% 29% 9%	297
January	1st to 10th	Night	7% 7% 36% 39% 10% 1	950
	11th to 20th	Night	6% 7% 39% 37% 10% 1	831
	21st to end	Night	6% 6% 40% 38% 9%	836
February	1st to 10th	Night	6% 8% 44% 35% 7%	760
	11th to 20th	Night	8% 9% 45% 33% 5%	744
	21st to end	Night	9% 11% 48% 30% 3	628
March	1st to 10th	Night	7% 9% 45% 33% 5%	760
	11th to 20th	Night	8% 13% 39% 32% 7%	711
	21st to end	Night	6% 12% 47% 30% 4	627
April	1st to 10th	Night	5% 12% 48% 31% 4	570
	11th to 20th	Night	7% 9% 53% 29% 2	563
	21st to end	Night	5% 9% 49% 32% 5%	570
May	1st to 10th	Night	5% 9% 47% 35% 5%	570
	11th to 20th	Night	7% 5% 37% 38% 11% 1	561
	21st to end	Night	6% 5% 40% 39% 10%	617
June	1st to 10th	Night	4 4 31% 51% 10%	570
	11th to 20th	Night	2 2 38% 50% 8%	570
	21st to end	Night	3 25% 52% 19%	570
July	1st to 10th	Night	5% 1 13% 50% 30% 1	555
	11th to 20th	Night	3 8% 50% 38% 1	552
	21st to end	Night	2 1 5% 47% 42% 2	624
August	1st to 10th	Night	3 1 5% 47% 42% 1	567
	11th to 20th	Night	4 1 9% 47% 38% 2	564
	21st to end	Night	5% 8% 46% 39% 1	627
September	1st to 10th	Night	6% 2 10% 47% 34% 1	570
	11th to 20th	Night	7% 1 15% 52% 23% 1	570
	21st to end	Night	7% 1 19% 49% 22% 1	570
October	1st to 10th	Night	7% 3 24% 48% 18% 1	570
	11th to 20th	Night	9% 3 31% 43% 13% 1	646
	21st to end	Night	9% 5% 27% 37% 20% 2	902
November	1st to 10th	Night	7% 5% 27% 46% 15% 1	975
	11th to 20th	Night	3 6% 33% 42% 16% 1	1000
	21st to end	Night	10% 7% 31% 37% 14% 1	973
December	1st to 10th	Night	9% 7% 35% 38% 10% 1	950
	11th to 20th	Night	8% 7% 40% 37% 8%	950
	21st to end	Night	10% 9% 38% 34% 8% 1	1045

Page generated at 2024-11-22 07:02:25. Version ac07

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