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 2025-02-06.

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% 6% 2 6% 4 4 4 3 5% 7% 46%	109037
	Night	13% 6% 2 5% 3 3 3 3 5% 6% 51%	109423
Transparency	Day	36% 6% 10% 22% 20% 6%	112685
	Night	33% 5% 9% 21% 23% 9%	113915
Seeing	Day	13% 7% 20% 26% 25% 9%	15506
	Night	14% 6% 24% 33% 20% 2	25458

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	18% 8% 3 5% 3 3 3 2 3 4 49%	4077
	11th to 20th	Day	13% 6% 2 5% 2 3 3 2 4 6% 54%	4080
	21st to end	Day	24% 7% 2 4 3 2 3 2 3 5% 45%	4488
February	1st to 10th	Day	22% 8% 3 6% 5% 3 3 2 4 4 40%	1755
	11th to 20th	Day	20% 8% 2 6% 5% 3 4 3 4 5% 41%	1768
	21st to end	Day	25% 7% 2 5% 4 2 3 3 3 5% 39%	1727
March	1st to 10th	Day	19% 9% 4 8% 4 3 3 3 4 6% 39%	3436
	11th to 20th	Day	17% 7% 2 6% 5% 4 4 4 6% 6% 38%	3480
	21st to end	Day	17% 8% 3 7% 4 3 3 3 4 7% 41%	3814
April	1st to 10th	Day	13% 5% 3 7% 4 4 4 3 6% 7% 43%	2175
	11th to 20th	Day	18% 6% 2 5% 3 4 4 4 5% 7% 44%	2254
	21st to end	Day	13% 6% 3 6% 4 3 4 4 5% 7% 45%	2280
May	1st to 10th	Day	21% 6% 2 6% 4 4 5% 4 4 6% 38%	3878
	11th to 20th	Day	13% 6% 2 6% 4 4 4 4 5% 8% 43%	4082
	21st to end	Day	15% 7% 3 7% 5% 5% 5% 4 6% 8% 35%	4477
June	1st to 10th	Day	8% 4 2 6% 5% 4 6% 5% 6% 9% 45%	2470
	11th to 20th	Day	6% 4 2 5% 5% 5% 6% 6% 7% 9% 45%	2470
	21st to end	Day	5% 4 2 4 5% 5% 5% 5% 7% 9% 50%	2470
July	1st to 10th	Day	9% 5% 2 6% 5% 5% 5% 5% 8% 11% 39%	4120
	11th to 20th	Day	6% 3 2 3 4 4 5% 4 7% 9% 54%	4120
	21st to end	Day	12% 9% 3 7% 5% 5% 5% 5% 7% 8% 35%	4465
August	1st to 10th	Day	2 1 1 3 3 3 3 4 6% 8% 66%	4104
	11th to 20th	Day	5% 3 2 5% 4 4 5% 4 7% 10% 50%	3860
	21st to end	Day	5% 4 2 6% 5% 5% 6% 6% 7% 8% 46%	4180
September	1st to 10th	Day	10% 5% 2 5% 4 4 4 4 6% 6% 50%	2280
	11th to 20th	Day	13% 4 1 5% 5% 4 5% 4 5% 8% 46%	2104
	21st to end	Day	9% 3 1 4 3 4 4 3 5% 7% 57%	2066
October	1st to 10th	Day	7% 3 1 4 2 4 4 3 5% 6% 61%	1900
	11th to 20th	Day	13% 6% 1 4 3 2 3 2 3 4 58%	1900
	21st to end	Day	16% 5% 2 5% 3 3 4 2 3 4 54%	2090
November	1st to 10th	Day	15% 5% 2 5% 4 2 3 3 5% 5% 51%	1958
	11th to 20th	Day	10% 5% 2 6% 4 3 4 3 5% 5% 55%	2000
	21st to end	Day	18% 7% 2 5% 3 3 3 2 3 5% 48%	1890
December	1st to 10th	Day	20% 7% 1 4 2 3 2 2 3 4 51%	2940
	11th to 20th	Day	20% 9% 3 6% 4 3 3 3 4 5% 41%	3391
	21st to end	Day	18% 10% 3 6% 4 3 3 2 4 5% 42%	4488
January	1st to 10th	Night	17% 6% 1 4 3 3 2 2 3 4 53%	5888
	11th to 20th	Night	13% 4 1 4 3 2 2 2 2 4 64%	5900
	21st to end	Night	25% 8% 2 5% 3 2 2 2 3 4 43%	6490
February	1st to 10th	Night	18% 6% 3 5% 4 3 2 2 4 6% 47%	2536
	11th to 20th	Night	20% 7% 3 5% 4 4 3 2 3 5% 44%	2312
	21st to end	Night	20% 7% 2 5% 3 2 3 2 2 4 49%	1727
March	1st to 10th	Night	21% 9% 2 5% 4 3 3 3 5% 6% 39%	3419
	11th to 20th	Night	16% 7% 2 6% 4 4 4 3 5% 7% 42%	3480
	21st to end	Night	13% 6% 2 7% 5% 4 4 4 5% 6% 44%	3817
April	1st to 10th	Night	11% 4 2 6% 4 4 4 3 4 6% 51%	2004
	11th to 20th	Night	13% 5% 2 5% 3 4 4 3 5% 7% 48%	1875
	21st to end	Night	11% 5% 2 6% 4 3 3 3 4 7% 52%	1900
May	1st to 10th	Night	17% 7% 2 6% 5% 5% 4 3 5% 7% 39%	3017
	11th to 20th	Night	15% 6% 2 7% 4 3 3 4 5% 7% 46%	2823
	21st to end	Night	15% 6% 2 6% 4 4 4 4 6% 8% 42%	3090
June	1st to 10th	Night	5% 3 2 5% 4 3 5% 4 6% 10% 54%	1710
	11th to 20th	Night	5% 4 1 3 2 4 4 3 4 9% 61%	1710
	21st to end	Night	4 2 1 4 3 4 4 4 6% 8% 60%	1710
July	1st to 10th	Night	8% 4 1 5% 4 4 4 5% 8% 11% 46%	2850
	11th to 20th	Night	4 3 1 4 3 3 3 3 8% 11% 56%	2850
	21st to end	Night	9% 7% 3 7% 5% 5% 5% 4 6% 7% 43%	3098
August	1st to 10th	Night	2 1 1 2 2 2 2 3 5% 7% 74%	2836
	11th to 20th	Night	4 3 1 4 3 3 4 5% 7% 12% 55%	2970
	21st to end	Night	4 3 2 4 4 4 5% 5% 8% 10% 52%	3476
September	1st to 10th	Night	6% 4 2 5% 3 4 5% 3 5% 7% 56%	1900
	11th to 20th	Night	11% 4 1 5% 3 4 5% 3 6% 7% 51%	2071
	21st to end	Night	7% 3 2 4 3 2 3 3 5% 7% 61%	2095
October	1st to 10th	Night	7% 3 1 4 2 3 3 3 5% 6% 64%	2280
	11th to 20th	Night	11% 5% 1 3 2 3 3 2 4 5% 61%	2280
	21st to end	Night	15% 5% 2 4 2 2 3 2 3 4 58%	2508
November	1st to 10th	Night	14% 5% 1 4 3 3 3 3 3 5% 56%	2340
	11th to 20th	Night	10% 5% 2 5% 3 3 3 3 5% 6% 57%	2400
	21st to end	Night	15% 6% 2 5% 4 3 3 3 3 4 52%	2505
December	1st to 10th	Night	17% 6% 2 5% 3 3 3 3 4 5% 50%	4250
	11th to 20th	Night	16% 8% 3 7% 4 4 4 3 3 4 44%	4816
	21st to end	Night	17% 9% 3 5% 3 3 3 2 4 4 47%	6490

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	42% 2 7% 29% 17% 3	4078
	11th to 20th	Day	32% 4 7% 26% 27% 5%	4080
	21st to end	Day	44% 3 5% 15% 22% 12%	4488
February	1st to 10th	Day	49% 4 6% 16% 18% 6%	1755
	11th to 20th	Day	48% 3 6% 19% 18% 7%	1777
	21st to end	Day	49% 4 5% 12% 21% 8%	1727
March	1st to 10th	Day	47% 5% 7% 13% 21% 7%	3436
	11th to 20th	Day	44% 6% 9% 21% 17% 4	3480
	21st to end	Day	44% 5% 9% 19% 22% 2	3814
April	1st to 10th	Day	39% 6% 10% 21% 17% 8%	2175
	11th to 20th	Day	39% 7% 8% 19% 19% 7%	2254
	21st to end	Day	38% 7% 10% 21% 20% 4	2280
May	1st to 10th	Day	45% 7% 10% 25% 11% 2	3913
	11th to 20th	Day	37% 7% 11% 22% 21% 1	4086
	21st to end	Day	46% 9% 13% 19% 10% 3	4489
June	1st to 10th	Day	33% 10% 15% 25% 16% 1	2470
	11th to 20th	Day	32% 8% 14% 24% 19% 2	2470
	21st to end	Day	27% 8% 15% 29% 19% 2	2470
July	1st to 10th	Day	36% 9% 22% 25% 9% 1	4056
	11th to 20th	Day	24% 7% 15% 35% 19% 1	4051
	21st to end	Day	44% 7% 15% 24% 9%	4325
August	1st to 10th	Day	16% 6% 16% 29% 27% 6%	4090
	11th to 20th	Day	28% 6% 20% 34% 10% 2	3899
	21st to end	Day	31% 8% 15% 27% 16% 2	4179
September	1st to 10th	Day	33% 7% 12% 18% 21% 9%	2280
	11th to 20th	Day	36% 8% 10% 21% 19% 6%	2104
	21st to end	Day	26% 6% 11% 22% 25% 10%	2066
October	1st to 10th	Day	15% 3 6% 12% 25% 39%	3160
	11th to 20th	Day	20% 3 3 17% 33% 24%	3140
	21st to end	Day	28% 4 5% 24% 31% 7%	3428
November	1st to 10th	Day	36% 5% 7% 20% 24% 9%	1958
	11th to 20th	Day	33% 4 8% 17% 28% 11%	2000
	21st to end	Day	41% 4 6% 17% 24% 8%	1890
December	1st to 10th	Day	39% 3 5% 26% 22% 4	2940
	11th to 20th	Day	46% 3 5% 18% 21% 6%	3389
	21st to end	Day	46% 3 6% 19% 23% 4	4488
January	1st to 10th	Night	35% 3 7% 26% 25% 4	5888
	11th to 20th	Night	27% 3 5% 21% 32% 11%	5900
	21st to end	Night	47% 3 5% 14% 20% 11%	6490
February	1st to 10th	Night	40% 3 7% 19% 20% 9%	2536
	11th to 20th	Night	45% 4 6% 17% 21% 8%	2313
	21st to end	Night	41% 3 7% 16% 22% 11%	1727
March	1st to 10th	Night	46% 6% 6% 14% 17% 11%	3419
	11th to 20th	Night	40% 7% 10% 17% 18% 9%	3480
	21st to end	Night	40% 5% 8% 18% 26% 3	3817
April	1st to 10th	Night	34% 5% 10% 22% 18% 12%	2004
	11th to 20th	Night	35% 6% 9% 19% 20% 11%	1875
	21st to end	Night	32% 5% 11% 23% 24% 5%	1900
May	1st to 10th	Night	44% 8% 10% 21% 12% 5%	3047
	11th to 20th	Night	38% 7% 10% 23% 20% 2	2824
	21st to end	Night	38% 9% 15% 22% 15% 3	3099
June	1st to 10th	Night	23% 9% 16% 31% 18% 3	1710
	11th to 20th	Night	22% 7% 14% 29% 24% 4	1710
	21st to end	Night	21% 7% 14% 27% 26% 5%	1710
July	1st to 10th	Night	29% 8% 22% 30% 10% 1	2805
	11th to 20th	Night	20% 6% 15% 37% 20% 2	2796
	21st to end	Night	39% 6% 13% 28% 13% 1	2999
August	1st to 10th	Night	11% 4 15% 28% 36% 6%	2826
	11th to 20th	Night	21% 6% 20% 32% 18% 3	2997
	21st to end	Night	25% 8% 15% 24% 26% 2	3476
September	1st to 10th	Night	26% 8% 13% 21% 22% 10%	1900
	11th to 20th	Night	31% 7% 11% 22% 21% 9%	2071
	21st to end	Night	22% 6% 9% 22% 27% 13%	2095
October	1st to 10th	Night	14% 3 6% 14% 22% 41%	3800
	11th to 20th	Night	17% 2 4 14% 34% 28%	3779
	21st to end	Night	23% 4 5% 21% 31% 16%	4120
November	1st to 10th	Night	32% 5% 8% 16% 27% 12%	2340
	11th to 20th	Night	29% 4 8% 17% 28% 14%	2400
	21st to end	Night	38% 4 5% 18% 26% 9%	2505
December	1st to 10th	Night	38% 4 6% 22% 24% 5%	4250
	11th to 20th	Night	44% 4 7% 15% 20% 10%	4817
	21st to end	Night	42% 3 7% 19% 25% 4	6490

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% 37% 24% 5%	300
	11th to 20th	Day	21% 15% 37% 19% 8% 1	300
	21st to end	Day	23% 16% 36% 16% 8%	330
February	1st to 10th	Day	26% 12% 35% 21% 5% 2	285
	11th to 20th	Day	27% 13% 39% 16% 4	270
	21st to end	Day	32% 20% 36% 10% 3	225
March	1st to 10th	Day	19% 19% 30% 24% 8%	270
	11th to 20th	Day	19% 21% 34% 21% 5%	270
	21st to end	Day	16% 19% 39% 21% 5%	297
April	1st to 10th	Day	16% 14% 38% 22% 9% 1	355
	11th to 20th	Day	23% 12% 27% 27% 9% 2	452
	21st to end	Day	14% 13% 31% 30% 11% 2	460
May	1st to 10th	Day	17% 9% 29% 34% 11% 1	524
	11th to 20th	Day	13% 6% 26% 32% 19% 4	675
	21st to end	Day	10% 6% 22% 33% 24% 5%	734
June	1st to 10th	Day	6% 5% 11% 30% 37% 11%	680
	11th to 20th	Day	5% 2 12% 34% 37% 10%	680
	21st to end	Day	4 1 12% 30% 37% 16%	680
July	1st to 10th	Day	7% 1 7% 28% 42% 14%	671
	11th to 20th	Day	3 1 6% 27% 40% 23%	668
	21st to end	Day	8% 6% 21% 44% 21%	739
August	1st to 10th	Day	4 1 4 23% 47% 20%	676
	11th to 20th	Day	9% 2 4 22% 43% 20%	562
	21st to end	Day	9% 1 4 17% 42% 27%	539
September	1st to 10th	Day	9% 1 8% 23% 37% 23%	490
	11th to 20th	Day	7% 2 11% 22% 36% 22%	314
	21st to end	Day	11% 4 13% 27% 29% 16%	300
October	1st to 10th	Day	4 1 16% 39% 32% 7%	300
	11th to 20th	Day	11% 5% 28% 31% 19% 6%	300
	21st to end	Day	19% 11% 24% 27% 15% 3	330
November	1st to 10th	Day	17% 6% 30% 26% 18% 3	300
	11th to 20th	Day	9% 9% 32% 37% 11% 1	300
	21st to end	Day	19% 15% 27% 26% 12% 1	300
December	1st to 10th	Day	19% 12% 36% 22% 9% 2	300
	11th to 20th	Day	25% 11% 32% 22% 9% 1	300
	21st to end	Day	22% 15% 36% 21% 4 2	330
January	1st to 10th	Night	20% 9% 33% 32% 6%	1000
	11th to 20th	Night	21% 10% 36% 27% 6%	1000
	21st to end	Night	20% 8% 38% 30% 4	1100
February	1st to 10th	Night	21% 9% 36% 28% 6%	976
	11th to 20th	Night	22% 11% 38% 26% 3	838
	21st to end	Night	24% 13% 36% 24% 3	471
March	1st to 10th	Night	20% 9% 35% 29% 6%	570
	11th to 20th	Night	18% 8% 33% 34% 6% 1	570
	21st to end	Night	16% 10% 37% 30% 7%	627
April	1st to 10th	Night	12% 9% 39% 32% 8%	570
	11th to 20th	Night	14% 8% 37% 29% 12%	563
	21st to end	Night	11% 8% 36% 33% 11% 1	570
May	1st to 10th	Night	10% 7% 29% 42% 12%	570
	11th to 20th	Night	12% 6% 26% 35% 20% 2	561
	21st to end	Night	8% 4 18% 44% 24% 2	617
June	1st to 10th	Night	5% 1 9% 38% 43% 4	570
	11th to 20th	Night	4 2 9% 42% 40% 3	570
	21st to end	Night	3 8% 36% 44% 8%	570
July	1st to 10th	Night	5% 1 5% 32% 49% 8%	555
	11th to 20th	Night	4 1 4 30% 54% 7%	552
	21st to end	Night	3 1 5% 31% 50% 10%	624
August	1st to 10th	Night	3 4 32% 53% 8%	567
	11th to 20th	Night	7% 1 5% 34% 47% 7%	564
	21st to end	Night	6% 1 5% 30% 51% 8%	627
September	1st to 10th	Night	7% 1 8% 33% 44% 6%	570
	11th to 20th	Night	11% 2 7% 34% 44% 3	570
	21st to end	Night	8% 1 9% 38% 41% 4	575
October	1st to 10th	Night	8% 2 10% 43% 31% 6%	760
	11th to 20th	Night	11% 4 22% 42% 19% 2	760
	21st to end	Night	16% 6% 25% 33% 17% 2	836
November	1st to 10th	Night	16% 3 23% 40% 17% 1	780
	11th to 20th	Night	11% 7% 29% 38% 14%	800
	21st to end	Night	15% 10% 31% 31% 12% 1	905
December	1st to 10th	Night	18% 7% 31% 36% 8%	1000
	11th to 20th	Night	20% 9% 30% 34% 8%	1000
	21st to end	Night	21% 10% 32% 30% 7%	1100

Page generated at 2025-02-03 02:05:55. Version ac07

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