Texarkana
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Texarkana clear sky chart from 2005-11-06 to 2026-06-01.

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	13% 6% 2 6% 4 4 4 3 5% 7% 46%	132335
	Night	13% 5% 2 5% 3 3 3 3 5% 6% 50%	131089
Transparency	Day	36% 5% 10% 22% 19% 6%	135944
	Night	33% 5% 9% 21% 22% 9%	135557
Seeing	Day	13% 7% 21% 26% 24% 9%	17284
	Night	14% 6% 25% 33% 20% 2	27146

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	16% 8% 2 5% 3 3 3 2 4 5% 48%	5289
	11th to 20th	Day	11% 6% 2 5% 2 3 3 2 4 6% 56%	5310
	21st to end	Day	24% 8% 2 6% 3 3 3 2 3 5% 41%	5812
February	1st to 10th	Day	22% 8% 3 6% 5% 3 3 2 4 3 41%	1890
	11th to 20th	Day	20% 8% 3 6% 4 3 4 4 4 5% 40%	1960
	21st to end	Day	23% 7% 2 5% 4 3 3 3 3 5% 42%	1903
March	1st to 10th	Day	20% 8% 3 7% 3 2 3 2 4 6% 40%	5046
	11th to 20th	Day	13% 5% 2 5% 3 3 4 3 5% 6% 51%	5090
	21st to end	Day	16% 8% 3 6% 4 4 4 3 4 6% 42%	5583
April	1st to 10th	Day	14% 6% 3 7% 4 4 4 3 6% 6% 43%	2404
	11th to 20th	Day	17% 6% 2 5% 3 4 4 4 5% 7% 43%	2494
	21st to end	Day	13% 7% 3 7% 5% 4 4 4 5% 7% 42%	2520
May	1st to 10th	Day	20% 7% 2 6% 4 5% 5% 3 4 6% 38%	5683
	11th to 20th	Day	14% 6% 3 8% 5% 5% 4 4 5% 7% 39%	5992
	21st to end	Day	13% 7% 3 7% 5% 5% 5% 4 6% 8% 37%	6577
June	1st to 10th	Day	8% 4 2 6% 5% 5% 6% 5% 6% 9% 44%	2601
	11th to 20th	Day	7% 4 2 5% 5% 5% 6% 6% 7% 9% 44%	2600
	21st to end	Day	5% 4 2 4 4 4 6% 5% 7% 9% 51%	2600
July	1st to 10th	Day	8% 6% 2 7% 6% 5% 6% 6% 8% 12% 33%	5900
	11th to 20th	Day	5% 3 1 3 3 4 5% 4 6% 10% 56%	5900
	21st to end	Day	9% 6% 3 6% 5% 4 5% 4 7% 8% 43%	6422
August	1st to 10th	Day	2 1 1 3 3 3 3 4 6% 8% 66%	4234
	11th to 20th	Day	5% 3 1 5% 4 4 5% 4 7% 10% 51%	3984
	21st to end	Day	5% 4 2 7% 5% 5% 6% 6% 7% 8% 45%	4312
September	1st to 10th	Day	9% 5% 2 6% 4 4 4 4 6% 6% 50%	2400
	11th to 20th	Day	13% 4 1 5% 4 5% 5% 4 5% 8% 46%	2215
	21st to end	Day	9% 3 1 4 3 4 4 3 5% 7% 56%	2174
October	1st to 10th	Day	7% 3 1 4 2 4 4 3 5% 6% 62%	2000
	11th to 20th	Day	12% 6% 1 4 3 2 3 2 4 5% 59%	2000
	21st to end	Day	16% 6% 2 5% 3 3 4 2 3 4 53%	2200
November	1st to 10th	Day	14% 5% 2 5% 4 2 3 3 5% 5% 52%	2058
	11th to 20th	Day	10% 5% 2 6% 4 3 4 3 4 5% 55%	2100
	21st to end	Day	18% 7% 2 5% 4 3 3 3 3 5% 47%	1984
December	1st to 10th	Day	20% 7% 1 5% 3 3 2 2 3 4 51%	3030
	11th to 20th	Day	20% 9% 3 6% 4 3 3 3 3 5% 42%	3481
	21st to end	Day	18% 10% 3 6% 4 3 3 2 4 5% 43%	4587
January	1st to 10th	Night	16% 7% 2 5% 3 3 3 3 4 5% 49%	7634
	11th to 20th	Night	10% 3 1 3 2 2 2 2 3 5% 67%	7680
	21st to end	Night	26% 8% 2 6% 3 3 3 2 3 3 41%	8402
February	1st to 10th	Night	18% 7% 3 5% 4 3 3 3 3 6% 47%	2730
	11th to 20th	Night	21% 7% 3 5% 4 3 3 2 3 5% 44%	2561
	21st to end	Night	18% 7% 3 5% 3 2 3 2 2 4 51%	1903
March	1st to 10th	Night	20% 8% 2 5% 3 3 3 3 4 5% 43%	5029
	11th to 20th	Night	12% 5% 1 4 4 4 4 3 6% 7% 51%	5090
	21st to end	Night	14% 6% 2 6% 4 3 4 3 5% 6% 45%	5588
April	1st to 10th	Night	12% 4 2 6% 4 4 4 3 5% 6% 50%	2214
	11th to 20th	Night	12% 5% 2 5% 3 4 4 3 6% 7% 48%	2075
	21st to end	Night	12% 5% 2 6% 4 3 3 3 4 7% 50%	2100
May	1st to 10th	Night	18% 8% 3 6% 5% 5% 4 3 5% 7% 38%	4422
	11th to 20th	Night	15% 7% 2 8% 4 4 4 4 5% 6% 40%	4143
	21st to end	Night	14% 6% 2 5% 3 4 4 4 6% 9% 43%	4542
June	1st to 10th	Night	5% 3 2 4 4 3 5% 4 6% 10% 54%	1800
	11th to 20th	Night	5% 5% 1 3 2 4 4 3 4 9% 60%	1800
	21st to end	Night	4 2 1 3 3 4 3 4 6% 9% 60%	1800
July	1st to 10th	Night	7% 4 2 6% 5% 5% 5% 5% 9% 12% 40%	4078
	11th to 20th	Night	4 3 1 4 3 3 4 4 7% 11% 56%	4077
	21st to end	Night	7% 5% 2 5% 4 5% 5% 4 6% 9% 48%	4449
August	1st to 10th	Night	2 1 1 2 2 2 2 2 5% 7% 74%	2926
	11th to 20th	Night	4 3 1 4 3 3 4 4 7% 12% 55%	3066
	21st to end	Night	4 3 2 4 4 4 5% 5% 8% 10% 51%	3586
September	1st to 10th	Night	6% 4 2 5% 3 4 4 3 6% 7% 56%	2000
	11th to 20th	Night	10% 4 1 5% 3 4 5% 3 6% 7% 51%	2180
	21st to end	Night	7% 3 2 4 3 2 3 3 6% 7% 60%	2205
October	1st to 10th	Night	7% 2 1 4 2 3 3 2 5% 5% 65%	2400
	11th to 20th	Night	11% 4 1 3 2 3 3 2 4 5% 62%	2400
	21st to end	Night	15% 5% 2 4 2 2 3 2 3 4 57%	2640
November	1st to 10th	Night	13% 5% 1 4 3 3 3 3 3 5% 57%	2460
	11th to 20th	Night	10% 5% 2 5% 3 3 3 3 5% 6% 57%	2520
	21st to end	Night	15% 6% 2 5% 4 3 3 3 3 4 51%	2630
December	1st to 10th	Night	17% 6% 3 5% 3 3 3 3 4 5% 50%	4380
	11th to 20th	Night	16% 8% 3 7% 4 4 4 3 3 4 45%	4946
	21st to end	Night	17% 9% 3 5% 3 3 3 2 4 4 47%	6633

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	40% 2 9% 30% 16% 2	5290
	11th to 20th	Day	29% 4 6% 27% 30% 4	5310
	21st to end	Day	47% 3 5% 14% 21% 11%	5812
February	1st to 10th	Day	49% 4 6% 17% 18% 6%	1890
	11th to 20th	Day	48% 3 7% 19% 17% 6%	1969
	21st to end	Day	46% 3 6% 13% 23% 9%	1903
March	1st to 10th	Day	46% 4 5% 14% 20% 12%	5046
	11th to 20th	Day	33% 5% 6% 17% 21% 18%	5090
	21st to end	Day	44% 4 9% 21% 19% 3	5585
April	1st to 10th	Day	40% 6% 9% 21% 17% 7%	2404
	11th to 20th	Day	39% 7% 9% 18% 20% 7%	2494
	21st to end	Day	40% 7% 11% 20% 19% 3	2520
May	1st to 10th	Day	46% 6% 10% 26% 11% 2	5718
	11th to 20th	Day	43% 7% 11% 18% 19% 2	5996
	21st to end	Day	43% 8% 13% 20% 13% 4	6590
June	1st to 10th	Day	33% 10% 15% 25% 16% 1	2601
	11th to 20th	Day	33% 8% 15% 24% 18% 2	2600
	21st to end	Day	26% 8% 16% 30% 19% 2	2600
July	1st to 10th	Day	39% 8% 21% 23% 8%	5836
	11th to 20th	Day	22% 7% 18% 36% 16% 1	5831
	21st to end	Day	37% 7% 15% 29% 12% 1	6240
August	1st to 10th	Day	16% 6% 15% 30% 27% 6%	4220
	11th to 20th	Day	28% 6% 20% 35% 10% 1	4023
	21st to end	Day	32% 8% 15% 27% 16% 2	4311
September	1st to 10th	Day	33% 7% 12% 18% 21% 9%	2400
	11th to 20th	Day	35% 8% 10% 23% 18% 6%	2215
	21st to end	Day	26% 6% 11% 22% 24% 10%	2174
October	1st to 10th	Day	15% 3 6% 12% 26% 38%	3260
	11th to 20th	Day	19% 3 4 18% 33% 23%	3240
	21st to end	Day	29% 4 5% 24% 31% 7%	3538
November	1st to 10th	Day	35% 5% 6% 20% 25% 9%	2058
	11th to 20th	Day	32% 4 8% 18% 27% 11%	2100
	21st to end	Day	42% 4 5% 18% 24% 7%	1984
December	1st to 10th	Day	40% 3 5% 26% 22% 4	3030
	11th to 20th	Day	46% 3 5% 18% 21% 6%	3479
	21st to end	Day	45% 3 6% 19% 23% 4	4587
January	1st to 10th	Night	38% 4 7% 24% 23% 3	7635
	11th to 20th	Night	23% 2 5% 20% 37% 12%	7680
	21st to end	Night	50% 3 5% 14% 19% 10%	8402
February	1st to 10th	Night	41% 3 7% 19% 20% 9%	2730
	11th to 20th	Night	45% 3 6% 18% 20% 7%	2562
	21st to end	Night	40% 3 7% 15% 22% 13%	1903
March	1st to 10th	Night	44% 4 5% 13% 20% 14%	5029
	11th to 20th	Night	32% 5% 7% 16% 20% 20%	5090
	21st to end	Night	39% 4 8% 20% 23% 5%	5588
April	1st to 10th	Night	35% 5% 10% 22% 17% 11%	2214
	11th to 20th	Night	35% 6% 10% 18% 20% 11%	2075
	21st to end	Night	34% 5% 11% 23% 23% 4	2100
May	1st to 10th	Night	46% 7% 11% 21% 12% 4	4452
	11th to 20th	Night	44% 6% 11% 19% 19% 2	4144
	21st to end	Night	37% 7% 16% 20% 14% 6%	4551
June	1st to 10th	Night	24% 9% 16% 30% 18% 3	1800
	11th to 20th	Night	23% 7% 14% 29% 24% 4	1800
	21st to end	Night	20% 7% 16% 27% 26% 5%	1800
July	1st to 10th	Night	34% 8% 20% 28% 9% 1	4035
	11th to 20th	Night	20% 6% 20% 35% 18% 2	4026
	21st to end	Night	32% 6% 15% 31% 14% 2	4320
August	1st to 10th	Night	11% 5% 15% 28% 36% 6%	2916
	11th to 20th	Night	21% 6% 20% 33% 18% 3	3093
	21st to end	Night	26% 8% 15% 24% 25% 2	3586
September	1st to 10th	Night	26% 7% 14% 20% 23% 9%	2000
	11th to 20th	Night	30% 7% 11% 24% 20% 8%	2180
	21st to end	Night	22% 6% 10% 22% 27% 13%	2205
October	1st to 10th	Night	14% 3 6% 14% 23% 40%	3920
	11th to 20th	Night	17% 2 4 15% 34% 28%	3899
	21st to end	Night	24% 4 5% 21% 31% 16%	4252
November	1st to 10th	Night	31% 5% 8% 17% 27% 12%	2460
	11th to 20th	Night	29% 4 8% 17% 28% 13%	2520
	21st to end	Night	38% 4 5% 19% 26% 9%	2630
December	1st to 10th	Night	38% 4 6% 22% 24% 5%	4380
	11th to 20th	Night	44% 4 7% 15% 20% 10%	4947
	21st to end	Night	42% 3 7% 19% 25% 4	6633

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	23% 11% 38% 24% 5%	330
	11th to 20th	Day	20% 15% 38% 19% 7% 1	330
	21st to end	Day	24% 16% 36% 17% 7%	363
February	1st to 10th	Day	25% 12% 37% 19% 5% 2	330
	11th to 20th	Day	27% 15% 39% 14% 5%	330
	21st to end	Day	27% 20% 36% 12% 4	273
March	1st to 10th	Day	21% 19% 30% 23% 7%	330
	11th to 20th	Day	20% 21% 36% 18% 4	330
	21st to end	Day	15% 17% 39% 24% 5%	363
April	1st to 10th	Day	18% 13% 36% 23% 10% 1	424
	11th to 20th	Day	22% 13% 28% 27% 8% 2	532
	21st to end	Day	17% 12% 31% 27% 11% 2	540
May	1st to 10th	Day	18% 9% 30% 32% 10% 1	610
	11th to 20th	Day	15% 8% 26% 30% 18% 3	775
	21st to end	Day	10% 5% 22% 34% 23% 5%	844
June	1st to 10th	Day	7% 5% 13% 30% 35% 10%	731
	11th to 20th	Day	6% 2 13% 34% 36% 10%	730
	21st to end	Day	4 1 11% 30% 39% 16%	730
July	1st to 10th	Day	7% 1 7% 28% 43% 14%	721
	11th to 20th	Day	3 1 6% 27% 41% 22%	718
	21st to end	Day	8% 5% 22% 43% 21%	794
August	1st to 10th	Day	4 1 4 23% 49% 20%	726
	11th to 20th	Day	9% 2 3 22% 44% 21%	606
	21st to end	Day	10% 1 4 19% 40% 25%	583
September	1st to 10th	Day	9% 1 8% 25% 36% 22%	530
	11th to 20th	Day	7% 1 10% 22% 38% 23%	345
	21st to end	Day	11% 4 14% 27% 29% 16%	330
October	1st to 10th	Day	4 1 17% 38% 33% 7%	330
	11th to 20th	Day	10% 5% 27% 31% 20% 6%	330
	21st to end	Day	20% 10% 25% 26% 16% 3	363
November	1st to 10th	Day	17% 6% 29% 27% 18% 3	330
	11th to 20th	Day	10% 9% 33% 37% 11% 1	330
	21st to end	Day	20% 15% 28% 26% 11% 1	330
December	1st to 10th	Day	20% 12% 36% 22% 8% 2	330
	11th to 20th	Day	25% 10% 32% 22% 9% 2	330
	21st to end	Day	21% 15% 34% 24% 4 1	363
January	1st to 10th	Night	20% 9% 33% 31% 6%	1050
	11th to 20th	Night	20% 10% 37% 27% 6%	1050
	21st to end	Night	21% 8% 38% 29% 4	1155
February	1st to 10th	Night	21% 9% 37% 27% 5%	1050
	11th to 20th	Night	23% 12% 37% 25% 3	927
	21st to end	Night	22% 13% 36% 25% 3	519
March	1st to 10th	Night	21% 9% 35% 29% 5%	630
	11th to 20th	Night	18% 9% 34% 32% 6% 1	630
	21st to end	Night	16% 10% 38% 31% 7%	693
April	1st to 10th	Night	13% 9% 38% 32% 8%	630
	11th to 20th	Night	14% 9% 37% 28% 11%	623
	21st to end	Night	12% 8% 35% 33% 11% 1	630
May	1st to 10th	Night	12% 7% 29% 41% 11%	630
	11th to 20th	Night	12% 7% 27% 33% 19% 2	621
	21st to end	Night	9% 4 17% 45% 23% 2	683
June	1st to 10th	Night	6% 1 11% 39% 41% 4	600
	11th to 20th	Night	4 2 11% 42% 39% 3	600
	21st to end	Night	3 8% 37% 44% 7%	600
July	1st to 10th	Night	5% 1 5% 32% 49% 8%	585
	11th to 20th	Night	4 1 3 30% 54% 8%	582
	21st to end	Night	3 1 4 31% 51% 10%	657
August	1st to 10th	Night	3 4 32% 53% 8%	597
	11th to 20th	Night	7% 1 5% 34% 46% 7%	594
	21st to end	Night	7% 1 5% 30% 50% 8%	660
September	1st to 10th	Night	7% 1 9% 34% 43% 6%	600
	11th to 20th	Night	10% 2 7% 34% 44% 4	600
	21st to end	Night	8% 1 9% 38% 40% 4	605
October	1st to 10th	Night	7% 2 10% 43% 32% 6%	800
	11th to 20th	Night	11% 4 21% 42% 20% 2	800
	21st to end	Night	16% 7% 25% 34% 17% 2	880
November	1st to 10th	Night	15% 4 23% 40% 17% 1	820
	11th to 20th	Night	11% 7% 31% 37% 14%	840
	21st to end	Night	15% 10% 31% 31% 12% 1	950
December	1st to 10th	Night	18% 7% 32% 36% 7%	1050
	11th to 20th	Night	20% 9% 29% 34% 7%	1050
	21st to end	Night	21% 10% 32% 30% 7%	1155

Page generated at 2026-05-29 00:53:31. Version ac07

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