GoodSeeing
Home › Locations › Barstow

Barstow

34.899° N   117.023° W  ·  666 M
44 /100
PEAK
Marginal, but there is a 3 hours gap from 22:00.
BEST WINDOW 22:00–01:00 · ASTRO DARK 22:00–05:00 · MOON 1%
Transparency
1.00
Seeing
0.67
Cloud
58%
Moon
1%

Fair tonight

Hour by hour, local to Barstow. 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
48
44
40
37
34
40
39
39
25
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
2%
0%
0%
0%
8%
13%
2%
0%
0%
0%
0%
High cloud
41%
58%
91%
98%
99%
99%
97%
99%
98%
93%
84%
Transparency
1.00
1.00
0.99
0.96
0.93
0.90
0.88
0.86
0.85
0.83
0.82
Seeing
0.43
0.48
0.49
0.55
0.58
0.59
0.67
0.67
0.64
0.63
0.65
Moon clear
0%
down
down
down
down
down
down
down
down
down
down
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
−24
Transparency
−0
Seeing
−11
Moonlight
−0
Darkness
−65
Score
0
CLOUD 43% LOW 0% MID 2% HIGH 41% SUN -4.6° MOON 0.1° / 0% WIND 8 TEMP 30°
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 20:30 · OBSERVE 21:00–01:00 · 4H · MEAN 40

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

202200020406
MOON SETS BY 21:00
SET UP 20:30 · OBSERVE 21:00–23:00 · 2H · MEAN 41

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

202200020406
SEEING STAYS SOFT THROUGHOUTMOONLIGHT IGNORED FOR THIS TARGET
SET UP 20:30 · OBSERVE 21:00–23:00 · 2H · MEAN 39

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

202200020406
MOON SETS BY 21:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

202200020406
CLOUD NEVER DROPS BELOW 43%
SET UP 20:30 · OBSERVE 21:00–23:00 · 2H · MEAN 41

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

202200020406
MOON SETS BY 21:00
Advertisement
Reserved

The next week of nights

Tonight · 12 Aug
44
Fair
MOON 1%
22:00–01:00
Tomorrow · 13 Aug
59
Good
MOON 3%
22:00–05:00
Friday · 14 Aug
92
Excellent
MOON 7%
22:00–00:00
Saturday · 15 Aug
89
Excellent
MOON 17%
23:00–00:00
Sunday · 16 Aug
82
Excellent
MOON 25%
23:00–00:00
Monday · 17 Aug
72
Good
MOON 35%
23:00–00:00
Tuesday · 18 Aug
90
Excellent
MOON 44%
23:00–00:00
Advertisement
Reserved

Nearby locations

About this forecast

Conditions for Barstow, 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 →