Multimodel BMCB 9.0 ( OPERATIONAL + ENSEMBLES ICON-GFS-ECMWF-AIFS )
15 days forecast of the range of maximum temperatures, precipitations + general type of weather in Belgium
(Usually the highest values are in urban areas, the lower Meuse valley, the Gaume and in the Campine, except in the cold season where these values occur mainly in the coastal area; the lowest values are largely expected on the highlands of the Ardennes)
Updated December 4
Forecast and trends for the period up to December 18
Based on deterministic and operational models + AIFS
Thursday, December 5: 3–12°C
Precipitation (L/m²):
- Both Flanders: 10–15
- Central region: 10–15
- South of Sambre/Meuse: 5–15
Fairly windy: 45–65 km/h - Morning: Quite a bit of rain.
- Noon: Rainy.
- Night: Variable skies with more showers, especially in the east, and clear spells elsewhere.
Friday, December 6: 6–12°C
Precipitation (L/m²):
- Both Flanders: 5–10
- Central region: 5–15
- South of Sambre/Meuse: 5–20
Windy: 60–80 km/h - Morning: Clear spells in the northwest, cloudy elsewhere with some rain showers in northern Ardennes.
- Afternoon: Cloudy or variable with sunny spells in the west.
- Night: Quite a bit of rain.
Saturday, December 7: 6–13°C
Precipitation (L/m²):
- Both Flanders: 5–20
- Central region: 10–20
- South of Sambre/Meuse: 10–25
Very windy: 80–110 km/h - Morning: Heavy rain.
- Afternoon: More rain, transitioning to sleet in the high Ardennes.
- Night: Still rainy with snow or sleet in the high Ardennes. Variable skies in the northwest with rain or hail showers, possibly thunderstorms.
Sunday, December 8: 1–9°C
Precipitation (L/m²):
- Both Flanders: 2–15
- Central region: 0–5
- South of Sambre/Meuse: 0–15
Windy: 60–90 km/h - Morning: Cloudy or variable skies with showers and sleet or snow in the high Ardennes.
- Afternoon: Similar conditions with sleet or snow continuing in the high Ardennes.
- Night: Cloudy or variable skies with showers and sleet or snow in the Ardennes.
Monday, December 9: 0–8°C
Precipitation (L/m²):
- Both Flanders: 0–5
- Central region: 0–2
- South of Sambre/Meuse: 0–10
Fairly strong wind: 50–70 km/h - Morning: Cloudy or variable skies with rain/hail showers and snow or sleet in the high Ardennes.
- Afternoon: Cloudy or variable skies with sleet or snow in the high Ardennes.
- Night: Cloudy or variable skies with some snow or sleet in northern high Ardennes.
Tuesday, December 10: -1–6°C
Precipitation (L/m²):
- Both Flanders: 0–1
- Central region: 0–1
- South of Sambre/Meuse: 0–5
- Morning: Cloudy or variable skies with sunny spells in the northwest; some snow or sleet in northern high Ardennes.
- Afternoon: Similar conditions.
- Night: Cloudy or variable skies with wide clear spells in the northwest; frost likely.
Wednesday, December 11: -1–5°C
Precipitation (L/m²):
- Both Flanders: 0
- Central region: 0
- South of Sambre/Meuse: 0–1
- Morning: Cloudy or variable skies with sunny spells.
- Afternoon: Similar conditions.
- Night: Cloudy or variable skies with widespread frost, possibly moderate to severe in Ardennes.
Probable Trend (Based on Ensembles & AIFS)
- Thursday, December 12: -1–6°C, 0–1 L/m², dry conditions.
- Friday, December 13: -1–6°C, 1–2 L/m², very little sleet or snow.
- Saturday, December 14: -2–5°C, 1–2 L/m², some sleet or snow.
- Sunday, December 15: -1–7°C, 0–3 L/m², little or no sleet or snow.
- Monday, December 16: 0–6°C, 1–3 L/m², some sleet or snow.
- Tuesday, December 17: 0–6°C, 3–5 L/m², a few sleet or snow showers.
- Wednesday, December 18: 1–7°C, 1–5 L/m², periods of rain with a chance of sleet or snow in the high Ardennes.
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Copyright Luc Trullemans, only for publication on meteo-be.net & bmcb.info
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Graphics - General Forecast: https://www.bmcb.be/forecast-trend//
Analysis & Forecast maps : https://www.bmcb.be/forecast-europ-maps/
Thermal anomalies: https://www.bmcb.be/anomalies-belgium/
City forecast from ECMWF: https://www.windy.com/50.847/4.352?temp,50.822,4.352,12,i:pressure/ (replace location left above)
City forecast from ICON: https://www.windy.com/50.847/4.352?iconD2,temp,50.822,4.352,12,i:pressure,m:e3Tagiq/ (replace location left above )