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Antelope

38.708° N   121.330° W  ·  49 M
56 /100
PEAK
Worth setting up — 7 hours of workable sky from 22:00.
BEST WINDOW 22:00–05:00 · ASTRO DARK 22:00–05:00 · MOON 1%
Transparency
0.91
Seeing
0.77
Cloud
31%
Moon
1%

Good tonight

Hour by hour, local to Antelope. Colour encodes the score and nothing else; every other measurement is luminance.

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
20
21
22
23
00
01
02
03
04
05
06
0
17
54
45
38
36
36
50
56
34
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
1%
2%
2%
4%
8%
12%
9%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
1%
6%
4%
2%
High cloud
98%
96%
68%
84%
95%
98%
96%
54%
20%
38%
45%
Transparency
1.00
0.91
0.81
0.71
0.66
0.61
0.56
0.51
0.44
0.39
0.37
Seeing
0.70
0.76
0.76
0.77
0.76
0.75
0.75
0.73
0.73
0.77
0.75
Moon clear
0%
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Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Why this hour scored what it did
20 Clouded out · 0/100
Starting from
100
Cloud
−54
Transparency
−0
Seeing
−3
Moonlight
−0
Darkness
−42
Score
0
CLOUD 98% LOW 0% MID 0% HIGH 98% SUN -0.1° MOON 4.1° / 0% WIND 5 TEMP 26°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What are you doing tonight?

The same forecast, weighted for the target. Planetary work barely cares about moonlight; long exposures die on high cloud a visual observer would never notice.

SET UP 21:30 · OBSERVE 22:00–01:00 · 3H · MEAN 44

Darkness and moonlight dominate. Faint fuzzies need a genuinely dark sky more than they need steady air.

202200020406
HIGH CLOUD CLEARS 22:00
SET UP 01:30 · OBSERVE 02:00–06:00 · 4H · MEAN 48

Seeing is everything and moonlight is irrelevant. Bright targets punch through twilight, so darkness barely counts.

202200020406
TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 48

Tolerates soft seeing, but high cloud wrecks a wide frame and moonlight raises the background everywhere.

202200020406
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 05:00
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 42

Needs conditions to hold still for hours. Sustained transparency matters more than any single good hour.

202200020406
HIGH CLOUD CLEARS 04:00CLOUD RETURNS 05:00
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 54

Naked eye, whole sky. Total cloud and moonlight are the only things that count.

202200020406
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 05:00
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The next week of nights

Tonight · 12 Aug
56
Good
MOON 1%
22:00–05:00
Tomorrow · 13 Aug
76
Excellent
MOON 3%
22:00–05:00
Friday · 14 Aug
84
Excellent
MOON 7%
22:00–00:00
Saturday · 15 Aug
85
Excellent
MOON 17%
23:00–00:00
Sunday · 16 Aug
41
Fair
MOON 25%
23:00–00:00
Monday · 17 Aug
37
Fair
MOON 35%
23:00–00:00
Tuesday · 18 Aug
45
Fair
MOON 44%
23:00–00:00
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Nearby locations

About this forecast

Conditions for Antelope, California, United States are computed from the MET Norway forecast model for these exact coordinates, combined with sun and moon positions we calculate directly. The score weighs cloud cover by layer, atmospheric transparency, estimated seeing, moonlight and how dark the sky actually gets. Read the full method →