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Astronomical seeing Ypsilanti

Limited 3 Days Seeing Prediction

You can subscribe to an ad-free extended seven day seeing prediction with point+:

Datetime Clouds Seeing Bad Layers
Sun & Moon phases Hour EDT Low Mid High Index 1 Index 2 arc sec. Visible Planets Jet stream (m/s) Bot (km) Top (km) K/ 100m Temp (°C) 2m rel. hum. (%)
Wed
2014.04.23
06:45
20:20
03:16
14:23
waning crescent (287°)
08 99 98 99 3 1 2.19
LMV---UNP
18 m/s 07.2 08.1 0.6 K 2°C 12%
09 55 54 53 3 1 2.22
LMV---UNP
26 m/s 07.2 08.1 0.6 K 4°C 35%
10 22 20 20 3 1 2.23
LMV---UNP
33 m/s 07.2 08.1 0.6 K 6°C 52%
11 2 0 1 3 1 2.19
LMV---UN-
39 m/s 07.2 08.1 0.6 K 7°C 61%
12 0 0 0 3 1 2.09
LMV-J-UN-
42 m/s 07.2 08.1 0.5 K 9°C 60%
13 0 0 0 4 2 2.00
LMV-J-UN-
44 m/s 06.4 07.2 0.6 K 11°C 53%
14 0 0 10 4 2 1.97
LMV-J-UN-
46 m/s 06.4 07.2 0.6 K 12°C 45%
15 2 2 19 4 2 2.02
-MV-J-UN-
48 m/s 06.4 07.2 0.6 K 13°C 41%
16 1 1 27 4 2 2.12
-MV-J-U--
49 m/s 06.4 07.2 0.5 K 13°C 40%
17 0 0 32 4 2 2.19
-M--J-U--
50 m/s 04.2 04.9 0.5 K 13°C 41%
18 0 0 31 4 2 2.18
-M--J-U--
50 m/s 04.2 04.9 0.5 K 13°C 43%
19 0 0 31 4 2 2.12
-M-MJ----
49 m/s 04.2 04.9 0.5 K 12°C 47%
20 0 2 34 4 2 2.03
---MJ----
47 m/s 01.5 04.2 0.8 K 10°C 52%
21 0 9 43 4 2 1.94
---MJ----
45 m/s 01.5 04.2 0.8 K 9°C 56%
22 0 17 55 3 1 1.86
---MJS---
43 m/s 05.6 06.4 0.5 K 7°C 60%
23 0 22 63 3 1 1.79
---MJS---
41 m/s 05.6 06.4 0.5 K 6°C 63%
Thu
2014.04.24
06:43
20:21
03:52
15:32
waning crescent (300°)
00 0 25 65 3 1 1.73
---MJS---
40 m/s 05.6 07.3 0.5 K 5°C 64%
01 0 26 62 2 1 1.73
---MJS---
40 m/s 05.6 07.3 0.5 K 4°C 65%
02 1 33 58 2 1 1.82
---M-S--P
39 m/s 06.4 07.3 0.5 K 3°C 65%
03 5 46 58 3 1 2.05
---M-S--P
39 m/s 04.9 05.6 0.6 K 2°C 64%
04 10 63 61 3 1 2.32
---M-S--P
38 m/s 02.5 05.6 0.7 K 2°C 63%
05 14 76 64 2 1 2.47
L--M-S-NP
37 m/s 02.5 05.6 0.7 K 2°C 63%
06 15 81 67 3 1 2.35
L-V--S-NP
37 m/s 02.5 05.6 0.7 K 1°C 62%
07 15 80 69 3 1 2.11
LMV--SUNP
36 m/s 00.2 04.9 0.8 K 1°C 61%
08 16 76 72 3 1 1.90
LMV---UNP
36 m/s 00.2 04.3 0.8 K 2°C 61%
09 20 73 75 3 1 1.76
LMV---UNP
35 m/s 00.2 04.3 0.8 K 4°C 60%
10 24 71 79 3 1 1.68
LMV---UNP
35 m/s 00.2 04.9 0.8 K 7°C 58%
11 27 70 81 3 1 1.64
LMV---UN-
34 m/s 04.3 04.9 0.6 K 9°C 55%
12 27 69 80 3 1 1.58
LMV-J-UN-
34 m/s 04.3 04.9 0.6 K 11°C 50%
13 24 68 77 3 1 1.51
LMV-J-UN-
34 m/s 04.3 04.9 0.6 K 13°C 44%
14 18 62 72 3 1 1.43
LMV-J-UN-
34 m/s 04.3 04.9 0.6 K 14°C 40%
15 11 50 66 4 2 1.33
LMV-J-UN-
34 m/s 04.3 04.9 0.5 K 15°C 37%
16 5 36 60 4 2 1.24
-MV-J-U--
34 m/s 04.2 05.7 0.5 K 15°C 38%
17 0 24 57 4 2 1.15
-M--J-U--
34 m/s 04.2 05.6 0.5 K 15°C 42%
18 0 19 56 4 3 1.06
-M--J-U--
33 m/s 04.9 05.6 0.5 K 15°C 48%
19 0 21 58 4 2 1.01
-M-MJ----
32 m/s 04.9 05.6 0.5 K 14°C 57%
20 0 27 62 4 2 1.03
---MJ----
31 m/s 00.1 02.4 0.9 K 13°C 65%
21 1 37 67 3 1 1.16
---MJ----
30 m/s 04.9 05.6 0.5 K 12°C 70%
22 2 47 72 3 1 1.35
---MJS---
31 m/s 04.9 05.6 0.5 K 11°C 72%
23 3 53 76 3 1 1.46
---MJS---
31 m/s 04.9 05.6 0.5 K 10°C 73%
Fri
2014.04.25
06:42
20:22
04:28
16:43
waning crescent (312°)
00 4 53 79 3 1 1.42
---MJS---
32 m/s 00.1 03.0 0.9 K 9°C 72%
01 8 52 81 4 2 1.30
---MJS---
32 m/s 01.9 03.0 0.6 K 9°C 71%
02 16 54 84 4 3 1.18
---M-S--P
32 m/s 01.9 02.4 0.6 K 8°C 74%
03 31 64 88 4 2 1.08
---M-S--P
34 m/s 04.8 05.6 0.5 K 8°C 80%
04 48 78 92 4 2 1.05
---M-S--P
36 m/s 04.8 06.3 0.5 K 8°C 88%
05 63 88 97 4 2 1.07
L--M-S-NP
36 m/s 04.8 06.3 0.5 K 7°C 95%
06 73 89 99 5 3 1.11
L-V--S-NP
33 m/s 04.8 05.5 0.5 K 7°C 97%
07 75 81 95 4 2 1.21
LMV--SUNP
30 m/s 09.1 10.3 0.6 K 7°C 95%
08 70 64 81 4 2 1.41
LMV---UNP
26 m/s 09.1 10.3 0.8 K 8°C 88%
09 56 41 55 4 2 1.64
LMV---UNP
25 m/s 09.1 10.3 0.9 K 10°C 78%
10 40 17 25 4 2 1.66
LMV---UNP
24 m/s 09.1 10.3 0.9 K 12°C 67%
11 26 0 2 4 2 1.75
LMV---UN-
25 m/s 09.1 10.3 0.8 K 15°C 56%
12 18 0 0 1 1 1.79
LMV-J-UN-
25 m/s 09.1 10.3 0.8 K 17°C 50%
13 15 0 0 4 2 1.78
LMV-J-UN-
26 m/s 09.1 10.3 0.8 K 18°C 46%
14 13 0 1 1 1 1.74
LMV-J-UN-
26 m/s 09.1 10.3 0.8 K 20°C 43%
15 9 1 7 2 1 1.65
LMV-J-UN-
26 m/s 09.1 10.3 0.9 K 20°C 39%
16 4 1 11 4 3 1.51
LMV-J-U--
26 m/s 09.1 10.3 1.0 K 21°C 38%
17 0 0 12 1 1 1.35
-M--J-U--
26 m/s 09.1 10.3 1.1 K 21°C 41%
18 0 0 9 4 3 1.20
-M--J-U--
26 m/s 09.1 10.3 1.1 K 20°C 48%
19 0 1 7 4 3 1.10
-M-MJ----
27 m/s 09.1 10.3 1.1 K 18°C 58%
20 0 4 8 4 3 1.10
-M-MJ----
28 m/s 09.1 10.3 1.1 K 16°C 67%
21 5 8 14 4 3 1.20
---MJ----
28 m/s 09.1 10.3 1.2 K 14°C 70%
22 10 14 22 3 1 1.39
---MJS---
29 m/s 08.0 10.3 0.9 K 12°C 71%
23 16 18 27 3 1 1.57
---MJS---
29 m/s 08.0 10.3 0.9 K 11°C 74%

Additional information to your astronomical seeing prediction:

  • Values may not reflect precisely reality
  • For good seeing conditions look for dark blue colours in the cloud cover and green values in the Seeing Indices and Jet Stream
  • The estimated seeing indexes (1 & 2) range from 1 (poor) to 5 (excellent) seeing conditions. This value is computed based on the integration of turbulent layers in the atmosphere.
  • Estimation of seeing in arcseconds. This is a test prediction under development, uncalibrated for the time being.
  • Cloud cover ranges from dark blue (0% cover) to white (100% cover). Fog or very low cloud is not shown here (see pictocast for fog)
  • High jetstream speeds (>35m/s) usually correspond to bad seeing, as well as very low speeds (<5m/s). Colour gives a hint.
  • Bad Layers have a Temperature Gradient > 0.5K/100m. The actual gradient is shown K/100m. The top and bottom height of the Bad layers is indicated by Bad Layers bot/top
  • Visible planets and coordinates also considering temperature profiles of the atmosphere. The following planets/objects are available: LMVMJSUNP => Lunar (Moon), Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
  • If you move your courser over the visible planets column, hourly coordinates for each planet will appear: Azimuth (Az) from north with altitude in degree (Alt) onto horizon, right ascension (RA) and declination (DEC). We may consider adding 10 minutes coordinates and additional objects on request.