Panama City
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Panama City clear sky chart from 2005-11-05 to 2017-04-30.

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
60%
14978
23%
45655
19%
14937
65%
14937
32%
27139

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
40%
718
23%
2296
13%
716
52%
716
28%
1374
January16th to endNight
40%
768
25%
2304
15%
768
49%
768
26%
1472
February1st to 15thNight
44%
702
27%
2108
15%
699
55%
699
31%
1268
February16th to endNight
43%
631
25%
1893
14%
631
52%
631
29%
1175
March1st to 15thNight
50%
720
25%
2103
16%
720
57%
720
35%
1231
March16th to endNight
56%
768
26%
2112
18%
768
62%
768
38%
1246
April1st to 15thNight
58%
581
26%
1839
21%
581
64%
581
33%
1052
April16th to endNight
65%
537
30%
1791
29%
537
72%
537
41%
907
May1st to 15thNight
71%
494
27%
1517
24%
494
74%
494
41%
829
May16th to endNight
78%
513
24%
1538
23%
513
79%
513
42%
828
June1st to 15thNight
78%
495
19%
1485
19%
495
78%
495
37%
846
June16th to endNight
80%
495
18%
1485
17%
495
80%
495
34%
880
July1st to 15thNight
81%
465
11%
1395
12%
465
81%
465
30%
890
July16th to endNight
80%
522
10%
1533
11%
489
80%
489
28%
949
August1st to 15thNight
77%
494
10%
1638
12%
491
77%
491
25%
1057
August16th to endNight
71%
525
14%
1750
17%
525
71%
525
22%
1164
September1st to 15thNight
70%
621
13%
1776
14%
621
70%
621
25%
1210
September16th to endNight
69%
657
25%
1815
20%
657
70%
657
30%
1156
October1st to 15thNight
68%
660
32%
1815
27%
660
73%
660
41%
1038
October16th to endNight
61%
704
32%
2024
28%
704
66%
704
38%
1158
November1st to 15thNight
62%
700
31%
2262
30%
700
69%
700
39%
1189
November16th to endNight
52%
720
29%
2340
24%
720
62%
720
35%
1270
December1st to 15thNight
48%
720
26%
2340
22%
720
56%
720
30%
1373
December16th to endNight
44%
768
22%
2496
19%
768
50%
768
25%
1577

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
9%4245%35%5%6%9%43%
46052
Night
9%42442446%8%47%
45866
TransparencyDay
34%9%13%19%15%7%
45760
Night
32%7%13%19%17%8%
45662
SeeingDay
9%213%23%27%22%
4780
Night
10%317%28%30%9%
14985

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%4235%2445%8%46%
1641
16th to endDay
14%5%25%5%2435%5%44%
1920
February1st to 15thDay
13%5%24423346%50%
1750
16th to endDay
13%5%24323336%49%
1580
March1st to 15thDay
8%31431446%7%52%
1855
16th to endDay
9%32342345%6%53%
2111
April1st to 15thDay
9%43432445%7%50%
2118
16th to endDay
5%31432346%8%56%
2148
May1st to 15thDay
5%313425%46%9%51%
2100
16th to endDay
3214435%7%7%11%48%
2223
June1st to 15thDay
6%4245%45%8%8%12%37%
2145
16th to endDay
5%4245%47%10%11%12%30%
2145
July1st to 15thDay
7%5%26%7%5%8%9%10%13%23%
2145
16th to endDay
7%435%6%5%8%8%10%12%25%
2210
August1st to 15thDay
7%7%37%8%5%8%8%9%12%20%
1980
16th to endDay
10%6%26%6%37%7%9%8%29%
2100
September1st to 15thDay
9%6%25%7%36%6%8%11%31%
1842
16th to endDay
8%5%26%5%35%6%7%9%39%
1815
October1st to 15thDay
7%424433446%54%
1815
16th to endDay
8%313412346%58%
1848
November1st to 15thDay
7%42331345%6%56%
1593
16th to endDay
8%314334347%55%
1620
December1st to 15thDay
11%42333445%7%51%
1620
16th to endDay
17%6%35%42445%6%39%
1728
January1st to 15thNight
13%5%2343435%7%46%
2296
16th to endNight
15%5%345%2445%5%42%
2304
February1st to 15thNight
13%424423345%51%
2103
16th to endNight
14%5%24414335%49%
1893
March1st to 15thNight
10%42432346%9%48%
2103
16th to endNight
9%32333335%8%54%
2112
April1st to 15thNight
7%5%24425%45%8%49%
1839
16th to endNight
6%31331445%9%56%
1791
May1st to 15thNight
7%31322436%10%53%
1517
16th to endNight
4234346%6%11%52%
1538
June1st to 15thNight
43145%25%5%7%14%45%
1485
16th to endNight
42145%35%6%8%13%43%
1485
July1st to 15thNight
4325%436%7%9%15%38%
1485
16th to endNight
43245%37%6%9%16%36%
1647
August1st to 15thNight
6%3245%47%8%11%14%31%
1650
16th to endNight
10%4145%36%7%7%11%37%
1750
September1st to 15thNight
7%5%25%6%45%7%7%11%35%
1776
16th to endNight
7%5%26%43446%9%45%
1815
October1st to 15thNight
431443445%7%55%
1815
16th to endNight
7%5%24423435%57%
2024
November1st to 15thNight
7%31342335%6%56%
2262
16th to endNight
9%42432335%5%55%
2340
December1st to 15thNight
12%42332345%7%48%
2340
16th to endNight
14%6%25%4235%5%6%41%
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
35%5%11%15%21%10%
1642
16th to endDay
39%5%9%14%20%10%
1920
February1st to 15thDay
36%46%19%21%11%
1752
16th to endDay
36%48%17%22%11%
1580
March1st to 15thDay
27%6%11%22%24%8%
1855
16th to endDay
29%7%11%22%18%10%
2112
April1st to 15thDay
31%6%10%20%20%10%
2118
16th to endDay
24%6%13%27%20%7%
2148
May1st to 15thDay
27%8%13%23%18%8%
2100
16th to endDay
24%11%17%26%16%2
2227
June1st to 15thDay
32%13%18%28%5%
2145
16th to endDay
37%14%19%20%7%
2145
July1st to 15thDay
42%16%24%14%2
2006
16th to endDay
42%15%24%13%3
2061
August1st to 15thDay
46%17%20%12%3
1968
16th to endDay
44%15%19%13%5%1
2100
September1st to 15thDay
42%13%20%14%8%1
1842
16th to endDay
37%10%12%16%14%7%
1815
October1st to 15thDay
30%5%8%19%21%14%
1815
16th to endDay
27%46%15%26%18%
1848
November1st to 15thDay
27%47%20%25%14%
1593
16th to endDay
27%6%7%20%21%16%
1620
December1st to 15thDay
33%5%12%19%21%7%
1620
16th to endDay
44%6%10%18%13%6%
1728
January1st to 15thNight
36%5%9%16%20%11%
2296
16th to endNight
41%46%15%21%10%
2304
February1st to 15thNight
36%36%15%23%14%
2112
16th to endNight
38%46%15%21%13%
1893
March1st to 15thNight
31%5%11%21%21%8%
2103
16th to endNight
29%5%9%23%20%11%
2112
April1st to 15thNight
30%6%10%17%22%11%
1839
16th to endNight
25%410%28%22%9%
1791
May1st to 15thNight
26%5%14%22%21%9%
1518
16th to endNight
22%8%19%27%17%4
1540
June1st to 15thNight
26%8%23%31%8%1
1485
16th to endNight
28%10%24%24%11%
1485
July1st to 15thNight
30%13%31%21%2
1395
16th to endNight
30%13%32%19%3
1533
August1st to 15thNight
33%14%31%17%2
1638
16th to endNight
38%12%22%17%7%1
1750
September1st to 15thNight
37%12%20%16%8%2
1776
16th to endNight
33%10%13%19%17%5%
1815
October1st to 15thNight
26%6%9%19%23%15%
1815
16th to endNight
30%35%15%23%20%
2024
November1st to 15thNight
27%37%19%25%15%
2262
16th to endNight
29%49%16%21%18%
2340
December1st to 15thNight
34%5%9%22%21%6%
2340
16th to endNight
41%49%21%14%7%
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
13%7%36%27%8%5%
90
16th to endDay
18%13%33%26%8%
96
February1st to 15thDay
416%38%26%12%1
90
16th to endDay
12%6%39%29%12%
81
March1st to 15thDay
9%5%39%31%11%2
145
16th to endDay
11%320%36%24%3
288
April1st to 15thDay
12%5%24%28%25%3
270
16th to endDay
7%117%32%31%9%
266
May1st to 15thDay
5%214%28%30%17%
228
16th to endDay
25%20%35%34%
267
June1st to 15thDay
7%216%35%36%
255
16th to endDay
10%212%30%43%
255
July1st to 15thDay
6%19%32%49%
245
16th to endDay
8%127%28%51%
270
August1st to 15thDay
12%213%26%45%
253
16th to endDay
10%28%34%44%
268
September1st to 15thDay
13%2313%37%29%
255
16th to endDay
9%15%25%38%20%
254
October1st to 15thDay
7%110%38%31%10%
255
16th to endDay
9%417%31%26%11%
272
November1st to 15thDay
13%116%37%21%7%
101
16th to endDay
4426%42%13%8%
90
December1st to 15thDay
15%6%24%38%10%4
90
16th to endDay
21%7%22%30%15%2
96
January1st to 15thNight
15%7%31%30%14%1
720
16th to endNight
17%8%29%32%11%
768
February1st to 15thNight
15%7%26%34%14%
704
16th to endNight
16%5%31%38%8%
631
March1st to 15thNight
11%5%28%38%16%
720
16th to endNight
10%422%36%24%1
768
April1st to 15thNight
9%320%35%29%1
581
16th to endNight
8%18%32%34%5%
537
May1st to 15thNight
9%111%35%34%7%
495
16th to endNight
5%7%19%54%11%
515
June1st to 15thNight
5%1420%52%16%
495
16th to endNight
5%211%52%27%
495
July1st to 15thNight
5%111%46%34%
465
16th to endNight
5%29%49%33%
522
August1st to 15thNight
6%118%47%35%
494
16th to endNight
12%212%43%29%
525
September1st to 15thNight
8%5%13%48%23%
621
16th to endNight
9%7%30%43%7%
657
October1st to 15thNight
7%113%33%38%5%
660
16th to endNight
10%316%33%32%4
704
November1st to 15thNight
9%318%38%26%3
700
16th to endNight
12%426%32%21%2
720
December1st to 15thNight
12%5%28%31%19%2
720
16th to endNight
17%5%26%33%16%1
768
Page generated at 2017-04-30 19:40:00. Version ac04

Copyright 2017 A. Danko


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