Laguna Atascosa Wildlife Refuge
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Laguna Atascosa Wildlife Refuge clear sky chart from 2005-11-06 to 2024-01-16.

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
0%
7228
0%
44717
0%
5799
0%
5799
28%
45302

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 10thNight
0%
458
0%
1508
0%
362
0%
362
26%
1711
January11th to 20thNight
0%
450
0%
1411
0%
344
0%
344
26%
1664
January21st to endNight
0%
382
0%
1450
0%
296
0%
296
23%
1606
February1st to 10thNight
0%
376
0%
1345
0%
286
0%
286
22%
1435
February11th to 20thNight
0%
350
0%
1276
0%
282
0%
282
24%
1357
February21st to endNight
0%
267
0%
974
0%
188
0%
188
22%
1072
March1st to 10thNight
0%
269
0%
1160
0%
195
0%
195
26%
1151
March11th to 20thNight
0%
252
0%
1278
0%
205
0%
205
19%
1282
March21st to endNight
0%
254
0%
1245
0%
193
0%
193
25%
1263
April1st to 10thNight
0%
257
0%
1283
0%
201
0%
201
21%
1220
April11th to 20thNight
0%
233
0%
1277
0%
193
0%
193
18%
1249
April21st to endNight
0%
237
0%
1201
0%
188
0%
188
20%
1188
May1st to 10thNight
0%
208
0%
1125
0%
174
0%
174
23%
1102
May11th to 20thNight
0%
173
0%
1023
0%
143
0%
143
27%
1032
May21st to endNight
0%
131
0%
1068
0%
112
0%
112
32%
1052
June1st to 10thNight
0%
34
0%
803
0%
29
0%
29
46%
848
June11th to 20thNight
0%
42
0%
823
0%
34
0%
34
39%
909
June21st to endNight
0%
61
0%
1067
0%
54
0%
54
34%
972
July1st to 10thNight
0%
61
0%
1131
0%
59
0%
59
29%
999
July11th to 20thNight
0%
29
0%
1011
0%
28
0%
28
42%
852
July21st to endNight
0%
33
0%
1013
0%
31
0%
31
49%
846
August1st to 10thNight
0%
13
0%
926
0%
12
0%
12
55%
764
August11th to 20thNight
0%
21
0%
1149
0%
20
0%
20
42%
909
August21st to endNight
0%
47
0%
1426
0%
45
0%
45
33%
1158
September1st to 10thNight
0%
39
0%
1275
0%
39
0%
39
26%
1164
September11th to 20thNight
0%
67
0%
1347
0%
67
0%
67
22%
1252
September21st to endNight
0%
70
0%
1176
0%
68
0%
68
28%
1125
October1st to 10thNight
0%
50
0%
918
0%
46
0%
46
35%
1015
October11th to 20thNight
0%
106
0%
1042
0%
88
0%
88
36%
1158
October21st to endNight
0%
201
0%
989
0%
140
0%
140
41%
1298
November1st to 10thNight
0%
164
0%
1157
0%
144
0%
144
36%
1288
November11th to 20thNight
0%
268
0%
1356
0%
238
0%
238
28%
1469
November21st to endNight
0%
324
0%
1382
0%
257
0%
257
30%
1490
December1st to 10thNight
0%
382
0%
1500
0%
323
0%
323
28%
1686
December11th to 20thNight
0%
414
0%
1799
0%
334
0%
334
23%
1869
December21st to endNight
0%
505
0%
2803
0%
381
0%
381
17%
2847

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
TransparencyDay
35%9%17%22%13%4
74567
Night
35%8%17%22%13%5%
74775
SeeingDay
10%316%32%30%9%
13203
Night
13%314%32%30%6%
23325

By Month

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 10thDay
47%6%11%15%15%7%
1708
11th to 20thDay
45%5%10%16%15%8%
1683
21st to endDay
46%7%11%16%13%7%
1980
February1st to 10thDay
49%6%9%15%14%7%
1800
11th to 20thDay
39%6%15%20%15%6%
1759
21st to endDay
40%6%14%19%14%6%
1560
March1st to 10thDay
41%5%17%18%15%5%
1980
11th to 20thDay
42%7%17%15%13%7%
1980
21st to endDay
34%8%17%20%13%7%
2178
April1st to 10thDay
38%9%18%19%12%5%
1980
11th to 20thDay
39%10%14%19%14%4
1956
21st to endDay
35%9%15%19%16%6%
2088
May1st to 10thDay
31%10%19%21%13%5%
2258
11th to 20thDay
34%9%15%26%13%3
2306
21st to endDay
26%11%17%24%20%1
2531
June1st to 10thDay
23%10%19%29%19%1
2340
11th to 20thDay
26%11%16%28%17%2
2340
21st to endDay
34%12%20%25%7%1
2340
July1st to 10thDay
37%12%24%23%4
2276
11th to 20thDay
24%11%27%29%8%
2271
21st to endDay
22%11%29%34%4
2405
August1st to 10thDay
16%12%30%36%7%
2221
11th to 20thDay
23%12%29%31%4
2094
21st to endDay
30%16%26%22%6%1
2178
September1st to 10thDay
37%12%18%20%12%1
1980
11th to 20thDay
43%13%16%15%11%2
1980
21st to endDay
38%11%17%19%11%4
1980
October1st to 10thDay
30%9%11%24%22%4
1980
11th to 20thDay
32%8%15%22%17%6%
1854
21st to endDay
30%7%9%19%25%9%
1980
November1st to 10thDay
35%8%12%23%18%4
1858
11th to 20thDay
46%6%10%17%16%6%
1900
21st to endDay
43%6%12%19%14%7%
1839
December1st to 10thDay
44%6%13%20%13%4
1710
11th to 20thDay
43%9%12%12%15%9%
2159
21st to endDay
46%7%9%19%16%3
3135
January1st to 10thNight
44%6%11%16%16%7%
2458
11th to 20thNight
44%6%9%14%17%11%
2415
21st to endNight
46%6%9%18%13%8%
2376
February1st to 10thNight
45%6%12%15%14%8%
2160
11th to 20thNight
41%7%13%18%15%6%
2098
21st to endNight
42%6%9%19%16%7%
1693
March1st to 10thNight
36%6%16%23%14%5%
1980
11th to 20thNight
45%7%13%15%13%7%
1980
21st to endNight
35%8%15%19%16%7%
2178
April1st to 10thNight
42%7%16%21%11%3
1980
11th to 20thNight
44%8%14%16%13%6%
1953
21st to endNight
42%8%14%16%13%7%
1869
May1st to 10thNight
39%10%17%15%12%6%
1695
11th to 20thNight
38%10%17%22%12%2
1594
21st to endNight
32%9%20%23%15%1
1746
June1st to 10thNight
20%9%21%30%18%2
1620
11th to 20thNight
24%11%17%34%13%3
1620
21st to endNight
28%12%26%25%8%1
1620
July1st to 10thNight
32%12%27%25%4
1575
11th to 20thNight
20%11%33%30%5%
1566
21st to endNight
17%9%35%33%6%1
1673
August1st to 10thNight
12%8%35%39%6%
1688
11th to 20thNight
19%10%35%33%3
1804
21st to endNight
25%10%30%27%7%1
2178
September1st to 10thNight
31%12%21%24%10%2
1980
11th to 20thNight
37%12%19%21%9%1
1980
21st to endNight
30%10%19%25%12%4
1980
October1st to 10thNight
26%7%13%27%22%5%
1980
11th to 20thNight
28%7%15%25%16%9%
2084
21st to endNight
27%5%10%24%24%10%
2376
November1st to 10thNight
29%8%15%23%20%5%
2220
11th to 20thNight
41%5%13%20%13%8%
2280
21st to endNight
38%6%15%20%13%8%
2337
December1st to 10thNight
42%6%12%20%15%4
2470
11th to 20thNight
38%8%13%17%13%11%
3037
21st to endNight
45%6%11%13%17%8%
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
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 10thDay
20%6%27%35%10%3
270
11th to 20thDay
19%8%28%36%7%2
255
21st to endDay
20%9%35%24%11%
264
February1st to 10thDay
21%327%35%12%2
240
11th to 20thDay
20%8%29%32%11%1
240
21st to endDay
16%9%42%28%5%
198
March1st to 10thDay
19%7%26%38%8%1
240
11th to 20thDay
20%8%33%31%8%
240
21st to endDay
12%9%41%34%4
264
April1st to 10thDay
13%5%39%33%9%
240
11th to 20thDay
12%11%34%32%9%1
234
21st to endDay
11%6%36%34%12%1
348
May1st to 10thDay
8%436%37%15%1
521
11th to 20thDay
9%328%45%15%1
625
21st to endDay
4217%53%21%3
679
June1st to 10thDay
318%40%41%8%
630
11th to 20thDay
5%15%43%42%5%
630
21st to endDay
6%16%39%34%14%
630
July1st to 10thDay
7%1431%46%11%
621
11th to 20thDay
4222%56%16%
618
21st to endDay
4123%55%17%
684
August1st to 10thDay
1224%54%19%
533
11th to 20thDay
11120%62%15%
408
21st to endDay
31219%43%33%
297
September1st to 10thDay
7%1421%44%24%
270
11th to 20thDay
6%2418%40%30%
270
21st to endDay
9%1421%44%21%
270
October1st to 10thDay
5%3427%44%17%
270
11th to 20thDay
10%18%26%37%17%
270
21st to endDay
15%318%37%22%5%
297
November1st to 10thDay
13%211%33%34%7%
270
11th to 20thDay
29%410%26%23%7%
270
21st to endDay
23%8%23%24%15%7%
270
December1st to 10thDay
20%319%31%20%7%
270
11th to 20thDay
21%8%21%33%13%4
270
21st to endDay
21%8%22%38%9%3
297
January1st to 10thNight
24%5%19%35%16%1
950
11th to 20thNight
22%6%20%39%13%
927
21st to endNight
21%6%22%37%14%1
792
February1st to 10thNight
24%5%23%34%13%
720
11th to 20thNight
22%8%20%36%14%
704
21st to endNight
20%7%25%38%9%
509
March1st to 10thNight
17%5%28%37%13%
540
11th to 20thNight
19%5%23%41%12%
540
21st to endNight
13%6%23%44%12%2
594
April1st to 10thNight
18%5%24%41%11%
540
11th to 20thNight
14%5%24%41%14%
533
21st to endNight
12%5%27%43%13%1
540
May1st to 10thNight
12%423%47%14%
540
11th to 20thNight
9%321%47%20%
531
21st to endNight
8%113%46%30%2
584
June1st to 10thNight
21434%53%7%
540
11th to 20thNight
31441%46%6%
540
21st to endNight
5%15%32%41%15%
540
July1st to 10thNight
7%427%51%11%
525
11th to 20thNight
21318%60%16%
522
21st to endNight
31216%65%14%
591
August1st to 10thNight
1116%63%18%
537
11th to 20thNight
3113%62%22%
534
21st to endNight
41311%53%28%
594
September1st to 10thNight
6%113%56%24%
540
11th to 20thNight
11%112%51%25%
540
21st to endNight
9%315%55%16%
540
October1st to 10thNight
42423%52%16%
540
11th to 20thNight
9%16%30%45%9%
644
21st to endNight
11%212%38%32%4
792
November1st to 10thNight
11%38%34%37%6%
740
11th to 20thNight
21%312%30%32%3
760
21st to endNight
18%418%35%23%3
817
December1st to 10thNight
19%5%15%33%22%4
950
11th to 20thNight
20%7%17%35%20%2
950
21st to endNight
19%5%24%35%15%2
1045
Page generated at 2024-01-13 08:37:59. Version ac07

Copyright 2024 Attilla Danko


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