Flying not recommended

Brienzer Rothorn (S) — 2317m

Imported · Orientation S, SW · 202°
25%
Local flying
Best window: 9h — 9h
Local flying is limited first by strong rain or snowfall. Outside of that constraint, some periods still look flyable, but the day is not broadly comfortable.
Local window 9h — 9hXC window No clear XC windowWatch-out: Strong rain or snowfall
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Launch wind
6 km/h
NW · 310°
Gust spread
34 km/h
rough launch feel
Lift quality
0.4 m/s
2/5 climb support
Cloud base
1107 m
40.9 km
Precipitation risk
1.1 mm/h
becomes limiting
Flying not recommended

Brienzer Rothorn (S) — 2317m

Imported · Orientation S, SW · 202°

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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
🌤
NO-GO
tailwind
12h
🌦
NO-GO
tailwind
13h
🌦
NO-GO
tailwind
14h
🌦
NO-GO
tailwind
15h
⛈
NO-GO
tailwind
16h
⛈
NO-GO
tailwind
17h
⛈
NO-GO
tailwind
18h
⛈
NO-GO
tailwind
19h
⛈
NO-GO
rain
20h
⛈
NO-GO
rain
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
——
2377m
2462m
2567m
2682m
2797m
2877m
2917m
2897m
2837m
2747m
2647m
Base
clouds
——
3167m
3354m
3667m
3842m
3742m
3479m
3255m
3080m
2905m
2780m
2679m
3600m
↗
12
↗
14
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16
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17
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19
↗
20
↗
21
↗
22
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23
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23
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22
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21
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21
3400m
↗
11
↗
12
↗
14
↗
14
↗
16
↗
17
↗
19
↗
20
↑
21
↑
21
↑
21
↑
20
↑
19
3200m
↗
9
↗
10
↗
11
↗
12
↗
13
↗
15
↗
16
↑
18
↑
20
↑
20
↑
19
↑
18
↑
17
3000m
↑
8
↗
9
↗
10
↗
10
↗
11
↗
12
↗
14
↗
16
↑
18
↑
18
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15
2800m
↑
8
↑
9
↑
9
↑
9
↑
10
↑
10
↗
11
↗
14
↗
16
↗
16
↗
15
↗
14
↗
13
2600m
↑
8
↑
8
↑
9
↑
8
↑
8
↑
8
↗
9
→
12
→
13
↗
14
↗
13
↗
12
↗
12
2400mLAUNCH
↖
7
↑
8
↑
8
↑
8
↑
7
↑
6
→
6
→
9
→
11
→
11
→
11
→
11
→
10
2200mLAUNCH
↖
7
↖
8
↖
8
↖
7
↑
5
↑
4
→
4
↘
7
↘
9
↘
9
→
9
→
9
→
9
2000m
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.