Logansport
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Logansport clear sky chart from 2005-11-06 to 2024-11-05.

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	14% 9% 3 7% 5% 4 4 4 6% 7% 36%	101119
	Night	15% 10% 4 7% 4 4 4 3 5% 6% 37%	97983
Transparency	Day	45% 7% 12% 22% 13% 1	104732
	Night	45% 6% 11% 21% 14% 2	102511
Seeing	Day	17% 8% 27% 25% 16% 7%	15677
	Night	19% 8% 28% 30% 13% 1	25498

By Month

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
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	15% 15% 9% 13% 5% 5% 4 4 6% 5% 19%	2527
	11th to 20th	Day	15% 17% 8% 14% 6% 5% 5% 8% 5% 3 15%	2530
	21st to end	Day	30% 22% 6% 10% 3 3 3 1 3 4 15%	2795
February	1st to 10th	Day	18% 15% 5% 11% 6% 5% 4 3 4 5% 25%	1881
	11th to 20th	Day	16% 12% 3 11% 6% 4 4 3 6% 6% 29%	1848
	21st to end	Day	17% 16% 6% 8% 5% 3 3 3 5% 6% 27%	1570
March	1st to 10th	Day	20% 18% 5% 8% 5% 3 4 2 4 5% 28%	3120
	11th to 20th	Day	12% 8% 3 7% 5% 3 5% 4 6% 7% 39%	3342
	21st to end	Day	18% 12% 5% 9% 6% 4 4 4 5% 7% 27%	4023
April	1st to 10th	Day	17% 11% 3 8% 4 4 5% 4 5% 7% 32%	2280
	11th to 20th	Day	17% 10% 3 6% 4 4 4 3 5% 6% 36%	2254
	21st to end	Day	19% 9% 3 6% 5% 3 5% 4 5% 8% 32%	2451
May	1st to 10th	Day	19% 9% 3 7% 5% 5% 5% 4 6% 9% 29%	4082
	11th to 20th	Day	18% 6% 2 6% 5% 4 4 4 6% 8% 36%	4081
	21st to end	Day	10% 6% 2 6% 4 4 5% 4 7% 10% 43%	4715
June	1st to 10th	Day	11% 6% 2 7% 5% 4 5% 4 6% 9% 41%	2660
	11th to 20th	Day	9% 5% 2 5% 4 4 5% 4 7% 9% 46%	2660
	21st to end	Day	11% 6% 2 6% 6% 5% 6% 5% 6% 8% 40%	2660
July	1st to 10th	Day	14% 7% 3 7% 5% 4 5% 4 7% 9% 37%	4440
	11th to 20th	Day	7% 4 2 5% 4 5% 5% 4 7% 11% 46%	4440
	21st to end	Day	9% 6% 2 7% 5% 4 5% 4 7% 9% 41%	4782
August	1st to 10th	Day	7% 4 2 6% 4 5% 5% 4 6% 10% 47%	4104
	11th to 20th	Day	8% 6% 2 5% 4 5% 5% 5% 6% 10% 45%	3894
	21st to end	Day	7% 4 2 6% 4 5% 4 4 6% 9% 50%	4180
September	1st to 10th	Day	10% 5% 2 7% 5% 5% 4 3 6% 6% 47%	2266
	11th to 20th	Day	10% 4 2 5% 5% 4 4 4 6% 8% 48%	2090
	21st to end	Day	13% 6% 2 5% 4 5% 4 4 5% 6% 45%	2090
October	1st to 10th	Day	13% 6% 2 6% 4 4 4 3 5% 7% 46%	2090
	11th to 20th	Day	16% 7% 3 6% 4 3 5% 4 5% 7% 40%	1904
	21st to end	Day	20% 9% 3 8% 5% 4 5% 4 6% 6% 31%	1881
November	1st to 10th	Day	12% 7% 2 5% 4 4 4 3 5% 6% 49%	1708
	11th to 20th	Day	18% 14% 3 7% 4 4 4 2 4 6% 35%	1710
	21st to end	Day	20% 11% 3 8% 5% 4 3 3 5% 6% 33%	1710
December	1st to 10th	Day	16% 15% 5% 10% 6% 4 4 2 4 6% 26%	1650
	11th to 20th	Day	14% 15% 6% 13% 5% 5% 4 3 4 5% 26%	1918
	21st to end	Day	26% 21% 8% 12% 5% 4 4 2 3 3 13%	2783
January	1st to 10th	Night	18% 17% 7% 11% 6% 4 4 3 4 4 22%	4428
	11th to 20th	Night	13% 22% 9% 14% 6% 5% 5% 3 4 3 17%	4440
	21st to end	Night	25% 18% 8% 10% 4 3 3 2 3 5% 19%	4870
February	1st to 10th	Night	19% 15% 5% 9% 5% 4 3 3 4 5% 27%	2295
	11th to 20th	Night	13% 13% 5% 9% 6% 4 5% 3 5% 6% 33%	2218
	21st to end	Night	20% 14% 3 10% 5% 3 3 2 5% 5% 30%	1884
March	1st to 10th	Night	18% 14% 4 7% 4 3 3 3 4 6% 35%	3733
	11th to 20th	Night	11% 7% 3 6% 4 5% 5% 4 5% 6% 45%	3618
	21st to end	Night	19% 9% 4 8% 5% 4 4 3 5% 6% 33%	3637
April	1st to 10th	Night	13% 10% 3 7% 4 4 4 3 6% 7% 39%	1900
	11th to 20th	Night	18% 8% 3 6% 4 3 4 3 6% 6% 38%	1875
	21st to end	Night	20% 8% 2 5% 5% 5% 4 4 6% 7% 36%	1729
May	1st to 10th	Night	17% 9% 3 8% 5% 4 5% 4 6% 8% 31%	2813
	11th to 20th	Night	20% 7% 2 6% 3 3 4 3 5% 8% 38%	2812
	21st to end	Night	10% 7% 2 5% 5% 4 5% 5% 6% 8% 43%	2846
June	1st to 10th	Night	9% 5% 2 5% 5% 4 4 3 6% 8% 50%	1520
	11th to 20th	Night	8% 6% 2 5% 4 3 4 5% 7% 8% 48%	1520
	21st to end	Night	10% 4 2 7% 5% 5% 4 4 6% 9% 44%	1520
July	1st to 10th	Night	10% 5% 2 6% 5% 5% 5% 4 6% 9% 45%	2530
	11th to 20th	Night	6% 4 2 5% 3 3 4 3 6% 9% 55%	2530
	21st to end	Night	8% 6% 2 8% 5% 5% 5% 4 7% 9% 41%	2780
August	1st to 10th	Night	10% 4 2 5% 3 5% 4 4 6% 9% 48%	2825
	11th to 20th	Night	7% 6% 2 6% 3 5% 4 4 6% 8% 50%	2931
	21st to end	Night	8% 5% 2 5% 4 4 3 3 5% 8% 52%	3476
September	1st to 10th	Night	10% 5% 2 6% 4 3 3 4 5% 7% 51%	1900
	11th to 20th	Night	8% 4 2 3 3 3 4 3 5% 7% 58%	2085
	21st to end	Night	12% 6% 1 5% 4 4 4 3 5% 6% 48%	2090
October	1st to 10th	Night	10% 5% 2 6% 4 4 4 3 4 6% 52%	2090
	11th to 20th	Night	17% 7% 2 6% 4 3 3 3 4 6% 45%	2271
	21st to end	Night	19% 8% 3 6% 4 5% 3 3 5% 6% 37%	2717
November	1st to 10th	Night	12% 9% 2 6% 4 4 4 3 5% 6% 46%	2470
	11th to 20th	Night	14% 10% 3 7% 5% 4 3 3 6% 7% 37%	2470
	21st to end	Night	18% 12% 4 8% 5% 4 5% 3 4 6% 31%	2470
December	1st to 10th	Night	17% 13% 5% 8% 6% 3 4 4 5% 5% 29%	2527
	11th to 20th	Night	17% 16% 5% 9% 5% 4 4 3 5% 5% 27%	3279
	21st to end	Night	25% 18% 7% 10% 5% 5% 4 3 4 5% 15%	4884

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	65% 6% 9% 15% 5%	2528
	11th to 20th	Day	70% 6% 9% 10% 5%	2530
	21st to end	Day	76% 3 7% 10% 4	2795
February	1st to 10th	Day	62% 5% 10% 14% 8% 2	1881
	11th to 20th	Day	55% 4 10% 22% 7% 1	1858
	21st to end	Day	57% 7% 12% 17% 6% 1	1570
March	1st to 10th	Day	60% 5% 8% 18% 9% 1	3120
	11th to 20th	Day	41% 7% 11% 30% 10% 1	3342
	21st to end	Day	54% 9% 16% 18% 3	4023
April	1st to 10th	Day	50% 7% 12% 19% 12%	2280
	11th to 20th	Day	47% 6% 11% 22% 11% 3	2254
	21st to end	Day	48% 7% 12% 20% 10% 3	2451
May	1st to 10th	Day	48% 9% 14% 21% 7%	4120
	11th to 20th	Day	43% 9% 14% 24% 9% 1	4085
	21st to end	Day	34% 8% 13% 24% 20% 2	4728
June	1st to 10th	Day	37% 8% 12% 24% 16% 3	2660
	11th to 20th	Day	33% 7% 12% 25% 20% 3	2660
	21st to end	Day	39% 9% 15% 19% 15% 3	2660
July	1st to 10th	Day	43% 6% 13% 22% 14% 2	4371
	11th to 20th	Day	30% 6% 16% 29% 18% 1	4365
	21st to end	Day	38% 8% 15% 18% 19% 2	4632
August	1st to 10th	Day	31% 8% 18% 28% 15% 1	4091
	11th to 20th	Day	32% 8% 13% 31% 16% 1	3933
	21st to end	Day	29% 7% 15% 26% 19% 4	4179
September	1st to 10th	Day	35% 7% 14% 22% 18% 4	2266
	11th to 20th	Day	32% 7% 11% 26% 22% 2	2090
	21st to end	Day	38% 5% 11% 24% 20% 2	2090
October	1st to 10th	Day	27% 4 10% 33% 25% 2	3480
	11th to 20th	Day	35% 5% 10% 22% 26% 1	3133
	21st to end	Day	44% 4 9% 27% 15% 2	3081
November	1st to 10th	Day	36% 6% 13% 26% 17% 2	1708
	11th to 20th	Day	51% 5% 11% 20% 12% 2	1710
	21st to end	Day	52% 5% 12% 22% 8% 1	1710
December	1st to 10th	Day	61% 4 12% 16% 7%	1650
	11th to 20th	Day	60% 6% 9% 22% 3	1915
	21st to end	Day	77% 4 7% 8% 3	2783
January	1st to 10th	Night	63% 7% 10% 14% 6%	4428
	11th to 20th	Night	73% 3 8% 12% 4	4440
	21st to end	Night	69% 4 9% 13% 5%	4870
February	1st to 10th	Night	59% 5% 12% 15% 8% 1	2295
	11th to 20th	Night	53% 5% 11% 19% 11% 1	2219
	21st to end	Night	56% 5% 10% 18% 9% 2	1884
March	1st to 10th	Night	51% 6% 9% 24% 9% 1	3733
	11th to 20th	Night	36% 8% 11% 27% 15% 2	3618
	21st to end	Night	50% 8% 14% 23% 6% 1	3637
April	1st to 10th	Night	44% 6% 13% 21% 14% 1	1900
	11th to 20th	Night	45% 6% 9% 21% 15% 3	1875
	21st to end	Night	46% 7% 10% 20% 13% 3	1729
May	1st to 10th	Night	48% 9% 11% 20% 11% 1	2840
	11th to 20th	Night	42% 9% 14% 24% 10% 1	2813
	21st to end	Night	35% 10% 12% 20% 20% 4	2854
June	1st to 10th	Night	32% 6% 12% 25% 21% 3	1520
	11th to 20th	Night	32% 8% 12% 24% 20% 4	1520
	21st to end	Night	35% 9% 15% 22% 15% 4	1520
July	1st to 10th	Night	35% 7% 14% 26% 12% 6%	2490
	11th to 20th	Night	25% 7% 14% 28% 25% 2	2482
	21st to end	Night	37% 7% 16% 17% 18% 4	2691
August	1st to 10th	Night	32% 7% 16% 28% 15% 1	2814
	11th to 20th	Night	31% 7% 13% 29% 18% 1	2958
	21st to end	Night	30% 6% 12% 28% 21% 3	3476
September	1st to 10th	Night	32% 7% 13% 23% 19% 6%	1900
	11th to 20th	Night	25% 6% 10% 28% 28% 3	2085
	21st to end	Night	35% 7% 10% 23% 22% 3	2090
October	1st to 10th	Night	22% 4 7% 34% 32% 1	3480
	11th to 20th	Night	32% 4 9% 24% 30% 1	3781
	21st to end	Night	35% 4 9% 27% 22% 2	4467
November	1st to 10th	Night	38% 5% 10% 24% 20% 3	2470
	11th to 20th	Night	46% 5% 11% 21% 15% 2	2470
	21st to end	Night	56% 4 9% 22% 8%	2470
December	1st to 10th	Night	57% 6% 12% 17% 9% 1	2527
	11th to 20th	Night	57% 7% 11% 17% 7% 1	3281
	21st to end	Night	72% 6% 9% 9% 4	4884

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	26% 16% 36% 14% 7% 1	270
	11th to 20th	Day	28% 13% 36% 19% 3 1	270
	21st to end	Day	31% 15% 32% 18% 4	297
February	1st to 10th	Day	27% 14% 35% 20% 4	270
	11th to 20th	Day	25% 16% 34% 18% 6% 1	270
	21st to end	Day	28% 16% 39% 13% 4	225
March	1st to 10th	Day	23% 17% 40% 17% 3	270
	11th to 20th	Day	25% 13% 34% 21% 6% 1	374
	21st to end	Day	30% 11% 32% 20% 6% 1	506
April	1st to 10th	Day	23% 11% 33% 22% 8% 2	460
	11th to 20th	Day	23% 12% 32% 17% 13% 2	452
	21st to end	Day	26% 13% 31% 20% 7% 2	460
May	1st to 10th	Day	24% 11% 29% 22% 11% 3	463
	11th to 20th	Day	20% 6% 30% 23% 15% 6%	487
	21st to end	Day	13% 5% 28% 26% 18% 11%	664
June	1st to 10th	Day	12% 7% 28% 28% 21% 5%	680
	11th to 20th	Day	10% 4 27% 31% 20% 7%	680
	21st to end	Day	13% 5% 28% 28% 19% 8%	680
July	1st to 10th	Day	12% 3 17% 27% 24% 16%	671
	11th to 20th	Day	8% 3 20% 32% 22% 15%	668
	21st to end	Day	11% 2 15% 32% 28% 12%	720
August	1st to 10th	Day	6% 2 14% 28% 31% 18%	486
	11th to 20th	Day	11% 3 19% 29% 26% 12%	479
	21st to end	Day	8% 2 14% 29% 33% 13%	539
September	1st to 10th	Day	10% 4 17% 30% 28% 10%	490
	11th to 20th	Day	10% 2 13% 28% 32% 15%	490
	21st to end	Day	16% 8% 22% 24% 22% 7%	490
October	1st to 10th	Day	12% 6% 26% 29% 19% 7%	490
	11th to 20th	Day	17% 17% 26% 28% 10% 2	387
	21st to end	Day	28% 12% 35% 20% 4 1	330
November	1st to 10th	Day	13% 12% 32% 27% 11% 4	282
	11th to 20th	Day	27% 13% 34% 16% 8% 1	270
	21st to end	Day	29% 11% 36% 20% 4	270
December	1st to 10th	Day	21% 17% 37% 17% 8%	270
	11th to 20th	Day	21% 14% 36% 23% 6%	270
	21st to end	Day	32% 14% 35% 17% 3	297
January	1st to 10th	Night	26% 14% 33% 23% 5%	950
	11th to 20th	Night	23% 14% 36% 22% 4	950
	21st to end	Night	24% 10% 35% 26% 4	1031
February	1st to 10th	Night	28% 9% 34% 27% 3	760
	11th to 20th	Night	22% 14% 36% 24% 4	743
	21st to end	Night	27% 13% 38% 19% 3	628
March	1st to 10th	Night	21% 13% 34% 26% 6%	760
	11th to 20th	Night	19% 12% 37% 27% 5% 1	760
	21st to end	Night	26% 8% 35% 26% 5%	733
April	1st to 10th	Night	18% 9% 39% 27% 7%	570
	11th to 20th	Night	22% 10% 33% 27% 7% 1	563
	21st to end	Night	25% 7% 32% 25% 8% 1	570
May	1st to 10th	Night	24% 5% 30% 33% 8%	570
	11th to 20th	Night	23% 4 24% 32% 16% 1	561
	21st to end	Night	12% 3 23% 41% 19% 2	617
June	1st to 10th	Night	11% 3 21% 46% 19% 1	570
	11th to 20th	Night	11% 3 26% 40% 19% 1	570
	21st to end	Night	12% 2 23% 38% 24% 1	570
July	1st to 10th	Night	10% 2 13% 41% 29% 6%	555
	11th to 20th	Night	9% 3 15% 39% 30% 5%	552
	21st to end	Night	7% 3 12% 43% 32% 3	624
August	1st to 10th	Night	6% 2 11% 44% 32% 4	567
	11th to 20th	Night	8% 2 12% 43% 30% 5%	564
	21st to end	Night	10% 1 13% 33% 38% 4	627
September	1st to 10th	Night	11% 2 15% 37% 29% 5%	570
	11th to 20th	Night	10% 3 13% 39% 31% 4	755
	21st to end	Night	14% 6% 18% 36% 23% 2	760
October	1st to 10th	Night	12% 5% 23% 37% 20% 3	760
	11th to 20th	Night	22% 10% 28% 28% 12%	760
	21st to end	Night	25% 10% 33% 25% 7%	836
November	1st to 10th	Night	17% 10% 33% 28% 11% 1	760
	11th to 20th	Night	20% 14% 32% 26% 7% 1	760
	21st to end	Night	26% 10% 31% 27% 7%	760
December	1st to 10th	Night	24% 11% 36% 24% 5%	817
	11th to 20th	Night	25% 11% 32% 26% 6%	950
	21st to end	Night	33% 11% 31% 22% 3	1045

Page generated at 2024-11-03 02:11:11. Version ac07

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