Marginal conditions

Brienzer Rothorn (NO) — 2191m

Imported · Orientation NE · 45°
45%
Local flying
Best window: 9h — 9h
Local flying reaches 45% because the launch setup looks mostly workable, while lift quality and timing are what keep the score from climbing higher.
Local window 9h — 9hXC window No clear XC window
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Launch wind
8 km/h
NW · 312°
Gust spread
32 km/h
rough launch feel
Lift quality
0.5 m/s
4/5 climb support
Cloud base
1036 m
40.9 km
Precipitation risk
0.2 mm/h
light showers possible
Marginal conditions

Brienzer Rothorn (NO) — 2191m

Imported · Orientation NE · 45°

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Hourly windows

2026-05-04 · Local flying
6h
🌙
NIGHT
7h
☁️
NO-GO
low vis
8h
☁️
NO-GO
low vis
9h
🌤
GO
10h
🌤
MARGINAL
11h
🌤
MARGINAL
12h
🌦
MARGINAL
13h
🌦
NO-GO
14h
🌦
NO-GO
15h
☁️
NO-GO
16h
☁️
NO-GO
17h
☁️
MARGINAL
18h
🌦
NO-GO
19h
🌦
NO-GO
tailwind
20h
🌦
NO-GO
tailwind
Best window: 9h — 9h
AI analysis
No analysis available for this day.

📊 Wind & thermals aloft

🎓 Full view
💡
Overview: colored arrows show wind speed and direction. Yellow to orange cells highlight the active thermal layer. The LAUNCH line marks the takeoff altitude.
Alt.6h7h8h9h10h11h12h13h14h15h16h17h18h
Top
BLH
——
2251m
2336m
2441m
2556m
2671m
2751m
2791m
2771m
2711m
2621m
2521m
Base
clouds
——
2866m
2991m
3216m
3341m
3329m
3241m
3154m
3154m
3154m
3116m
2966m
3600m
↗
12
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14
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16
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18
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20
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22
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23
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24
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25
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26
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26
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25
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24
3400m
↗
11
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12
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14
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16
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18
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19
↗
20
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23
↑
25
↑
25
↗
24
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23
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22
3200m
↗
10
↗
11
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13
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16
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18
↑
21
↑
24
↑
24
↑
23
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21
↗
19
3000m
↗
8
↗
9
↗
10
↗
11
↗
14
↗
14
↗
15
↑
19
↑
22
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23
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21
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19
↗
17
2800m
↗
7
↗
8
↗
9
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10
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12
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12
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13
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16
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20
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20
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18
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17
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15
2600m
↑
6
↑
6
↑
7
↑
8
↗
10
↗
10
↗
10
→
14
↗
17
↗
17
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16
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15
↗
14
2400m
↑
5
↑
5
↑
6
↑
7
↑
8
↗
8
↗
7
→
11
→
14
→
14
→
13
→
12
→
12
2200mLAUNCH
↑
3
↑
4
↖
5
↑
5
↑
7
↑
6
↗
5
↘
8
↘
11
→
12
→
10
→
10
→
10
2000m
↑
2
↖
2
↖
3
↑
4
↑
5
↑
5
↗
2
↘
5
↘
9
↘
9
↘
8
→
8
→
9
1800m
1600m
1400m
1200m
1000m
800m
600m
400m
200m
0m
0–56–1011–1516–2021–25>25km/hBLH topCloud baseThermals

💨 Wind at launch

🎓 Safety thresholds
💡
Mean wind is the constant speed. Gusts are sudden accelerations. Thresholds: 15 km/h = caution, 25 km/h = critical.

🌡 Temperature

🎓 Why it matters?
💡
Launch temperature affects your comfort and safety. Below 0°C, your fingers go numb and handling controls becomes difficult.

💧 Precipitation

🎓 Impact on the wing
⚠️
Golden rule: never fly in rain or snow. Water weighs down the wing (up to +5 kg), alters its aerodynamic profile and reduces lift. Snow can freeze on suspension lines.
Snow Rain/Showers

Sources: Open-Meteo (AROME 1.3km, ICON-D2 2km) · 2026-05-04 · Data fetched on 28 Apr at 20:08
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.