Official Meteorological TelemetryMeteoAlarm Advisory

MeteoAlarm Advisory: Heavy Precipitation Ahead

Significant moisture corridor approaching. Probability of localized street runoff and reduced visibility on transit corridors.

France•West & Brittany•Elev: 777m

Rennes Alpine Beacon

Monday, September 28, 2026

20°C
OvercastFeels like 20°
H: 27°•L: 16°•Rain: 5%
Meteorological Synthesis

Overcast with highs near 27°C.

Precipitation expected over the coming days with variable skies.

Wind
6.8 km/h
Humidity
71%
UV Index
0 / 11
Pressure
982 hPa

24-Hour Forecast & Meteogram

24 Hours Ahead
18°
0%
6k
00:00
20°
0%
7k
01:00
20°
0%
7k
02:00
19°
0%
5k
03:00
18°
3%
4k
04:00
18°
0%
3k
05:00
17°
0%
3k
06:00
17°
3%
3k
07:00
16°
5%
3k
08:00
17°
0%
3k
09:00
20°
0%
6k
10:00
21°
0%
12k
11:00
23°
0%
21k
12:00
24°
0%
19k
13:00
26°
0%
20k
14:00
27°
5%
21k
15:00
27°
3%
15k
16:00
27°
3%
10k
17:00
27°
0%
6k
18:00
26°
0%
5k
19:00
23°
3%
6k
20:00
23°
0%
10k
21:00
22°
3%
10k
22:00
21°
0%
11k
23:00

Air Quality (AQI)

Fair
21EAQI Index

Sensitive individuals should limit prolonged outdoor exertion.

PM2.5
5.5 µg/m³
PM10
7.4 µg/m³
NO₂
2.1 µg/m³

UV Index

Max 3.7
0/ 11 (Moderate)

Low to moderate exposure. Sunglasses recommended during peak afternoon hours.

0 (Low)6 (High)11+ (Extreme)

Wind

10m AGL
6.8km/h

Gusts up to 12.2 km/h.

Direction: 180°
Gentle Breeze

Solar Cycle

Daylight: 12h
Sunrise
07:48
Sunset
19:40
Twilight and solar zenith calculated based on WGS84 geographic coordinate telemetry.

Pressure

Stable High
1018hPa (MSL)
Surface Pressure982 hPa
Cloud Cover100%

Humidity & Moisture

RH Ratio
71%
Current Rain0 mm
24h Rain Accumulation0 mm

14-Day Detailed Outlook

14-Day Deterministic Model
Today
Sep 28
-
16°
27°
Tomorrow
Sep 29
-
19°
28°
Wed
Sep 30
75%
18°
21°
Thu
Oct 1
62%
13°
20°
Fri
Oct 2
-
10°
22°
Sat
Oct 3
-
12°
24°
Sun
Oct 4
21%
15°
19°
Mon
Oct 5
25%
15°
21°
Tue
Oct 6
22%
10°
21°
Wed
Oct 7
31%
11°
20°
Thu
Oct 8
23%
10°
17°
Fri
Oct 9
19%
7°
19°
Sat
Oct 10
24%
9°
17°
Sun
Oct 11
21%
9°
16°

Live Weather Radar — Pan-European Doppler Radar

Past -60m•Now•+120m Outlook

Nearby Cities & Stations in France

Regional Grid

Live Ground-Truth Observation Feed

Peer-verified reports logged by spotters and automated PWS stations across Europe

Real-time Ingestion
Log Local Ground ConditionStep 1 of 2: Select condition
Rennes Alpine Beacon
Ground Temp:°C

Observations undergo peer verification by regional spotters and enrich city telemetry.

Filter:
6 reports
S
Stefan MüllerAlpine Master SpotterAlps
Garmisch-Partenkirchen, Germany•Recent
15°C•Partly Cloudy

“Crisp morning air around Zugspitze valley station, golden sun breaking through light morning mountain mist. Zero wind, visibility > 35km.”

Ground-Truth Telemetry
C
Chloé DuboisCoastal Maritime SpotterAtlantic
Le Havre, France•Recent
14°C•Rain / Showers

“Fresh Atlantic westerly gale picking up, moderate sea swell (2.2m). Light intermittent drizzle across the harbor piers.”

Ground-Truth Telemetry
D
Dr. Alessandro RivaHigh Alpine ObserverAlps
Cortina d’Ampezzo, Italy•Recent
9°C•Clear Sky

“First seasonal frost dusting on peaks above 2,600m. Crisp alpine sky with cirrus uncinus approaching from the west.”

Ground-Truth Telemetry
M
Matteo RossiMediterranean SpotterMediterranean
Rome, Italy•Recent
22°C•Clear Sky

“Warm evening breeze across Piazza Navona. Pleasant 22°C with dry conditions and comfortable humidity around 48%.”

Ground-Truth Telemetry
E
Emre KayaBosporus Weather StationMediterranean
Istanbul, Turkey•Recent
21°C•Partly Cloudy

“Bosphorus breeze is cool and refreshing from the Black Sea. Crystal blue sky with passing white cumulus clouds at 1,200m.”

Ground-Truth Telemetry
A
Astrid LindholmFjord Atmospheric LabNordic
Bergen, Norway•Recent
11°C•Dense Fog

“Low scud clouds drifting over Mount Fløyen. Typical Atlantic marine layer with fine mist and 98% relative humidity.”

Ground-Truth Telemetry

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