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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
20 99 99 99 4 2 1.93
---MJ----
21 m/s 01.5 03.6 0.8 K 11°C 10%
21 54 80 93 4 2 1.98
---MJ----
33 m/s 01.5 03.6 0.8 K 9°C 28%
22 20 66 87 4 2 1.98
---MJ----
41 m/s 01.5 03.6 0.8 K 8°C 43%
23 0 57 82 4 2 1.93
---MJS---
45 m/s 01.5 03.6 0.8 K 7°C 55%
Thu
2014.04.24
06:43
20:21
03:52
15:32
waning crescent (300°)
00 0 51 77 4 2 1.84
---MJS---
45 m/s 04.9 05.6 0.5 K 6°C 63%
01 0 49 72 3 1 1.74
---MJS---
42 m/s 03.6 05.6 0.5 K 6°C 69%
02 0 50 67 3 1 1.64
---M-S---
39 m/s 03.6 05.6 0.6 K 6°C 73%
03 2 52 61 3 1 1.59
---M-S--P
38 m/s 01.5 05.6 0.7 K 6°C 73%
04 3 55 57 3 1 1.66
L--M-S--P
39 m/s 03.0 04.9 0.7 K 6°C 73%
05 2 57 56 3 1 1.81
L--M-S-NP
40 m/s 03.0 04.9 0.8 K 5°C 71%
06 1 56 60 3 1 1.98
L-V--S-NP
39 m/s 00.2 04.9 0.7 K 4°C 68%
07 2 55 66 3 1 2.16
LMV--SUNP
38 m/s 02.5 04.3 0.8 K 4°C 65%
08 7 53 68 3 1 2.27
LMV---UNP
36 m/s 05.7 06.4 0.5 K 4°C 63%
09 16 52 63 3 1 2.20
LMV---UNP
35 m/s 00.2 04.3 0.8 K 5°C 60%
10 26 52 53 3 1 2.00
LMV---UNP
34 m/s 06.4 07.3 0.5 K 6°C 58%
11 34 52 45 2 1 1.76
LMV---UN-
33 m/s 06.5 07.3 0.6 K 8°C 55%
12 35 52 40 3 1 1.53
LMV-J-UN-
33 m/s 06.5 07.3 0.5 K 10°C 51%
13 30 53 41 4 2 1.36
LMV-J-UN-
32 m/s 04.3 04.9 0.7 K 12°C 47%
14 23 54 48 4 2 1.25
LMV-J-UN-
32 m/s 04.3 05.7 0.6 K 13°C 44%
15 14 57 60 1 1 1.22
-MV-J-UN-
32 m/s 03.6 05.7 0.5 K 14°C 42%
16 6 60 73 4 3 1.22
-MV-J-U--
32 m/s 03.6 04.3 0.6 K 15°C 42%
17 1 63 83 4 3 1.23
-M--J-U--
31 m/s 03.6 04.3 0.7 K 14°C 46%
18 0 65 86 3 1 1.18
-M--J-U--
31 m/s 06.4 07.3 0.5 K 14°C 52%
19 0 65 84 4 2 1.12
-M-MJ----
29 m/s 04.9 05.6 0.6 K 13°C 60%
20 1 63 82 4 2 1.13
---MJ----
28 m/s 04.9 05.6 0.6 K 12°C 67%
21 2 59 81 3 1 1.17
---MJ----
26 m/s 04.2 05.6 0.6 K 11°C 70%
22 2 54 81 3 1 1.22
---MJS---
25 m/s 04.2 05.6 0.6 K 10°C 72%
23 1 51 81 3 1 1.16
---MJS---
24 m/s 04.2 04.9 0.8 K 9°C 73%
Fri
2014.04.25
06:42
20:22
04:28
16:43
waning crescent (312°)
00 0 53 81 3 1 1.08
---MJS---
24 m/s 04.2 04.9 0.8 K 9°C 73%
01 0 58 80 3 1 1.15
---MJS---
24 m/s 03.6 05.6 0.6 K 8°C 73%
02 1 61 80 3 1 1.27
---M-S--P
26 m/s 03.6 05.6 0.7 K 8°C 74%
03 5 63 80 4 2 1.17
---M-S--P
29 m/s 03.6 04.9 0.6 K 7°C 74%
04 10 62 81 4 2 1.21
---M-S--P
32 m/s 03.0 04.2 0.6 K 7°C 73%
05 14 60 83 4 3 1.35
L--M-S-NP
33 m/s 03.0 03.6 0.7 K 7°C 74%
06 16 59 84 4 2 1.37
L-V--S-NP
33 m/s 05.6 06.4 0.5 K 6°C 74%
07 18 61 85 4 2 1.30
LMV--SUNP
31 m/s 05.6 06.4 0.5 K 7°C 76%
08 26 65 88 4 3 1.33
LMV---UNP
28 m/s 03.5 04.2 0.5 K 7°C 80%
09 41 72 92 1 1 1.52
LMV---UNP
25 m/s 03.5 04.2 0.5 K 9°C 86%
10 59 80 96 4 2 1.61
LMV---UNP
21 m/s 03.5 04.8 0.5 K 11°C 92%
11 74 87 98 4 2 1.59
LMV---UN-
18 m/s 04.2 04.8 0.5 K 13°C 97%
12 81 90 99 4 3 1.41
LMV-J-UN-
15 m/s 00.4 02.4 0.8 K 15°C 96%
13 81 87 98 5 3 1.21
LMV-J-UN-
13 m/s 01.9 02.4 0.9 K 16°C 92%
14 76 80 96 4 3 1.08
LMV-J-UN-
12 m/s 05.5 06.3 0.5 K 17°C 86%
15 66 67 93 5 4 1.02
LMV-J-UN-
12 m/s 01.9 02.4 1.0 K 18°C 78%
16 55 52 92 5 4 1.10
-MV-J-U--
14 m/s 01.9 02.4 0.8 K 19°C 72%
17 46 39 92 4 3 1.11
-M--J-U--
15 m/s 07.2 08.1 0.6 K 18°C 68%
18 41 31 93 5 4 1.08
-M--J-U--
17 m/s 00.9 02.4 0.7 K 18°C 68%
19 37 25 91 4 3 1.09
-M-MJ----
18 m/s 09.1 10.3 0.6 K 16°C 71%
20 31 20 80 4 2 1.07
---MJ----
20 m/s 09.1 10.3 0.7 K 15°C 75%
21 21 13 57 4 2 1.00
---MJ----
23 m/s 09.1 10.3 0.8 K 13°C 78%
22 9 5 29 4 2 1.08
---MJS---
27 m/s 09.1 10.3 0.8 K 11°C 81%
23 0 0 7 4 2 1.17
---MJS---
29 m/s 09.1 10.3 0.7 K 9°C 84%

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.