Florida Caverns State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Florida Caverns State Park clear sky chart from 2005-11-05 to 2017-09-23.

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
58%
15476
23%
47037
19%
15432
64%
15432
31%
28512

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 15thNight
39%
720
23%
2327
13%
716
52%
716
27%
1403
January16th to endNight
38%
768
25%
2316
15%
768
48%
768
26%
1465
February1st to 15thNight
44%
703
27%
2108
16%
699
55%
699
31%
1253
February16th to endNight
38%
631
25%
1893
12%
631
50%
631
30%
1159
March1st to 15thNight
48%
720
26%
2088
16%
720
56%
720
34%
1226
March16th to endNight
51%
768
26%
2112
16%
768
57%
768
36%
1260
April1st to 15thNight
53%
608
26%
1866
21%
608
59%
608
34%
1082
April16th to endNight
62%
540
30%
1799
26%
540
69%
540
41%
928
May1st to 15thNight
66%
539
26%
1619
20%
539
72%
539
39%
905
May16th to endNight
74%
561
24%
1682
20%
561
77%
561
36%
982
June1st to 15thNight
75%
540
16%
1620
14%
540
76%
540
29%
1040
June16th to endNight
76%
540
16%
1620
15%
540
76%
540
27%
1060
July1st to 15thNight
77%
510
11%
1530
11%
510
77%
510
29%
995
July16th to endNight
79%
564
12%
1612
13%
531
79%
531
27%
1052
August1st to 15thNight
75%
539
11%
1788
13%
536
75%
536
23%
1188
August16th to endNight
72%
573
15%
1910
19%
573
72%
573
20%
1310
September1st to 15thNight
67%
691
14%
1951
14%
691
67%
691
22%
1380
September16th to endNight
65%
689
23%
1903
19%
689
69%
689
30%
1238
October1st to 15thNight
66%
660
33%
1815
27%
660
71%
660
42%
1037
October16th to endNight
61%
704
35%
2051
30%
704
67%
704
40%
1146
November1st to 15thNight
59%
700
32%
2251
29%
700
67%
700
40%
1180
November16th to endNight
52%
720
29%
2340
25%
720
61%
720
36%
1264
December1st to 15thNight
48%
720
25%
2340
21%
720
56%
720
30%
1384
December16th to endNight
43%
768
23%
2496
18%
768
51%
768
25%
1575

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
Cloud CoverDay
10%5%25%6%35%5%5%8%40%
47855
Night
9%4244245%6%8%46%
47243
TransparencyDay
39%7%11%16%16%7%
47558
Night
33%7%12%18%18%9%
47044
SeeingDay
10%212%21%26%25%
5385
Night
11%318%32%28%6%
15480

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
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
12%6%35%5%3345%6%43%
1611
16th to endDay
15%5%35%5%24346%44%
1905
February1st to 15thDay
12%6%15%42325%7%47%
1750
16th to endDay
14%424414447%47%
1580
March1st to 15thDay
10%5%243245%5%7%47%
1872
16th to endDay
11%6%14424447%48%
2111
April1st to 15thDay
11%5%25%4245%46%46%
2091
16th to endDay
8%425%5%34446%50%
2160
May1st to 15thDay
7%425%5%35%5%6%9%45%
2331
16th to endDay
6%5%25%7%46%6%5%7%42%
2431
June1st to 15thDay
8%5%36%7%5%8%7%8%10%29%
2340
16th to endDay
7%427%7%5%8%7%7%10%29%
2340
July1st to 15thDay
7%5%36%9%5%9%9%8%10%23%
2340
16th to endDay
7%436%8%6%9%8%7%10%26%
2444
August1st to 15thDay
9%6%38%9%5%8%8%9%10%21%
2160
16th to endDay
11%7%37%8%5%7%5%7%8%26%
2292
September1st to 15thDay
10%5%36%8%46%6%8%8%31%
1995
16th to endDay
11%5%25%5%45%45%8%39%
1894
October1st to 15thDay
9%4245%25%45%7%49%
1815
16th to endDay
8%414322336%58%
1821
November1st to 15thDay
8%423313447%55%
1604
16th to endDay
9%424423336%53%
1620
December1st to 15thDay
12%5%24425%446%46%
1620
16th to endDay
17%8%45%433445%38%
1728
January1st to 15thNight
12%5%25%43436%6%45%
2327
16th to endNight
16%6%24423346%44%
2316
February1st to 15thNight
13%424423346%50%
2103
16th to endNight
13%5%24423445%47%
1893
March1st to 15thNight
9%5%2432445%8%50%
2088
16th to endNight
8%5%24423346%53%
2112
April1st to 15thNight
8%415%435%45%7%49%
1866
16th to endNight
6%21332345%9%56%
1799
May1st to 15thNight
6%41432435%9%53%
1619
16th to endNight
4314436%5%6%9%50%
1682
June1st to 15thNight
5%316%5%35%8%8%13%38%
1620
16th to endNight
5%425%5%47%7%8%11%37%
1620
July1st to 15thNight
5%324446%6%8%13%38%
1620
16th to endNight
43245%38%8%9%13%36%
1721
August1st to 15thNight
6%4245%36%8%9%15%32%
1800
16th to endNight
7%436%6%46%7%8%10%34%
1910
September1st to 15thNight
8%5%35%6%46%7%8%11%32%
1951
16th to endNight
7%5%26%6%35%5%6%8%42%
1903
October1st to 15thNight
6%42332445%8%53%
1815
16th to endNight
8%424323335%58%
2051
November1st to 15thNight
7%313324347%57%
2251
16th to endNight
9%423423346%55%
2340
December1st to 15thNight
11%42442445%6%47%
2340
16th to endNight
16%6%35%42345%6%42%
2496

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 15thDay
39%5%8%13%22%10%
1612
16th to endDay
41%35%15%23%11%
1905
February1st to 15thDay
37%36%15%24%11%
1752
16th to endDay
36%5%6%16%24%10%
1580
March1st to 15thDay
32%6%9%19%23%8%
1872
16th to endDay
34%5%9%18%21%10%
2112
April1st to 15thDay
37%5%7%17%20%11%
2091
16th to endDay
34%48%22%19%10%
2160
May1st to 15thDay
33%7%10%17%20%9%
2331
16th to endDay
36%7%14%20%16%3
2435
June1st to 15thDay
44%11%13%20%8%1
2340
16th to endDay
45%11%15%16%10%1
2340
July1st to 15thDay
48%12%22%12%3
2201
16th to endDay
45%13%21%14%5%
2290
August1st to 15thDay
51%14%17%12%4
2148
16th to endDay
52%9%16%13%6%1
2292
September1st to 15thDay
44%12%13%13%13%2
1995
16th to endDay
40%7%11%16%16%6%
1894
October1st to 15thDay
33%410%17%21%13%
1815
16th to endDay
28%36%14%29%18%
1821
November1st to 15thDay
28%46%19%26%14%
1604
16th to endDay
30%36%18%23%16%
1620
December1st to 15thDay
39%38%17%22%8%
1620
16th to endDay
47%47%18%14%7%
1728
January1st to 15thNight
37%48%14%22%12%
2327
16th to endNight
41%46%13%23%11%
2316
February1st to 15thNight
35%36%15%22%16%
2112
16th to endNight
37%47%14%20%16%
1893
March1st to 15thNight
32%5%8%20%23%9%
2088
16th to endNight
31%5%9%18%22%12%
2112
April1st to 15thNight
32%49%17%23%12%
1866
16th to endNight
25%5%11%27%20%10%
1799
May1st to 15thNight
27%5%13%18%22%11%
1620
16th to endNight
27%9%15%23%17%6%
1684
June1st to 15thNight
31%13%18%24%9%1
1620
16th to endNight
34%12%21%19%9%1
1620
July1st to 15thNight
31%14%30%20%2
1530
16th to endNight
31%15%28%18%4
1612
August1st to 15thNight
34%16%28%16%31
1788
16th to endNight
39%15%19%14%8%2
1910
September1st to 15thNight
40%14%15%14%12%2
1951
16th to endNight
37%8%15%15%17%6%
1903
October1st to 15thNight
26%6%10%19%22%15%
1815
16th to endNight
29%3413%26%22%
2051
November1st to 15thNight
26%36%18%26%17%
2251
16th to endNight
29%48%16%21%20%
2340
December1st to 15thNight
35%5%9%19%23%7%
2340
16th to endNight
41%5%8%22%14%8%
2496

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 15thDay
14%7%36%23%11%6%
90
16th to endDay
13%19%28%29%9%
96
February1st to 15thDay
6%14%35%23%16%3
90
16th to endDay
8%7%35%29%18%
81
March1st to 15thDay
9%5%43%27%13%
162
16th to endDay
13%421%29%25%4
288
April1st to 15thDay
13%7%21%25%27%4
270
16th to endDay
8%117%29%28%14%
270
May1st to 15thDay
8%217%26%27%17%
288
16th to endDay
9%28%22%25%32%
331
June1st to 15thDay
13%5%14%30%35%
315
16th to endDay
9%214%24%48%
315
July1st to 15thDay
5%17%27%57%
305
16th to endDay
4211%27%53%
326
August1st to 15thDay
10%310%30%43%
313
16th to endDay
9%412%32%40%
332
September1st to 15thDay
14%6%15%30%31%
315
16th to endDay
15%1322%34%21%
283
October1st to 15thDay
12%9%36%31%10%
255
16th to endDay
9%418%29%28%9%
272
November1st to 15thDay
17%16%28%23%12%
112
16th to endDay
35%28%37%12%12%
90
December1st to 15thDay
16%5%27%34%13%2
90
16th to endDay
28%220%29%15%4
96
January1st to 15thNight
13%9%31%33%11%
720
16th to endNight
17%8%30%32%9%
768
February1st to 15thNight
15%6%28%39%9%
704
16th to endNight
16%6%35%35%5%
631
March1st to 15thNight
10%6%29%41%11%
720
16th to endNight
11%5%25%36%20%
768
April1st to 15thNight
10%326%42%16%
608
16th to endNight
8%122%36%27%2
540
May1st to 15thNight
7%219%38%28%3
540
16th to endNight
6%9%32%45%6%
563
June1st to 15thNight
6%7%29%46%10%
540
16th to endNight
6%423%48%17%
540
July1st to 15thNight
7%216%49%23%
510
16th to endNight
6%218%52%20%
564
August1st to 15thNight
8%1314%48%23%
539
16th to endNight
9%419%45%19%
573
September1st to 15thNight
10%16%22%45%13%
691
16th to endNight
9%110%31%40%7%
689
October1st to 15thNight
9%115%35%34%3
660
16th to endNight
10%417%33%31%2
704
November1st to 15thNight
9%421%39%22%3
700
16th to endNight
11%5%25%35%20%1
720
December1st to 15thNight
14%426%35%17%1
720
16th to endNight
18%5%25%34%15%
768
Page generated at 2017-09-24 09:15:50. Version ac04

Copyright 2017 A. Danko


Florida Caverns State Park Clear Sky Chart | Charts Home