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 6
Forecasts and trends for the period up to December 20
Based on deterministic and operational models + ECMWF (AIFS)
Saturday, December 7: 5/12°C
Precipitation (L/m²):
- Both Flanders: 9-12
- Central Belgium: 7-12
- South of Sambre-Meuse: 5-20
Very windy: 80-100 km/h - Morning: Variable skies with sunny spells but still rain in the southeast.
- Afternoon: Significant rain in the west and center but some sunshine in the Ardennes.
- Next night: Considerable rain with sleet or snow in the higher areas of the Ardennes.
Sunday, December 8: 3/10°C
Precipitation (L/m²):
- Both Flanders: 5-10
- Central Belgium: 2-10
- South of Sambre-Meuse: 2-10
Windy: 35-85 km/h - Morning: Rain in the south, center, and west; clear spells in the northeast.
- Afternoon: Light rain persists in the west and southwest.
- Next night: Cloudy and misty with some snow in the northeast Ardennes.
Monday, December 9: 0/8°C
Precipitation (L/m²):
- Both Flanders: 0
- Central Belgium: 0-5
- South of Sambre-Meuse: 0-5
Fairly strong wind: 55-75 km/h - Morning: Grey skies, mostly dry.
- Afternoon: Generally grey and dry.
- Next night: Cloudy with some snow or sleet in the northern Ardennes; possible clear spells in the southern Ardennes.
Tuesday, December 10: 0/7°C
Precipitation (L/m²):
- Both Flanders: 0
- Central Belgium: 0
- South of Sambre-Meuse: 0-2
Moderately windy: 45-65 km/h - Morning: Generally grey skies.
- Afternoon: Mostly grey skies.
- Next night: Cloudy skies.
Wednesday, December 11: 0/6°C
Precipitation (L/m²):
- Both Flanders: 0
- Central Belgium: 0
- South of Sambre-Meuse: 0
- Morning: Cloudy or variable with a few sunny spells.
- Afternoon: Cloudy or variable with some sunny spells.
- Next night: Cloudy or variable with some clear spells.
Thursday, December 12: 1/7°C
Precipitation (L/m²):
- Both Flanders: 0
- Central Belgium: 0
- South of Sambre-Meuse: 0
- Morning: Cloudy with sunny spells.
- Afternoon: Cloudy or variable with rare sunny spells.
- Next night: Cloudy or variable with clear spells moving in from the south.
Friday, December 13: 0/6°C
Precipitation (L/m²):
- Both Flanders: 0
- Central Belgium: 0
- South of Sambre-Meuse: 0
- Morning: Some sunny spells.
- Afternoon: Sunny spells but increasing cloud cover in the northwest.
- Next night: Cloudy with rain in the west and center.
Saturday, December 14: 0/7°C
Precipitation (L/m²):
- Both Flanders: 5
- Central Belgium: 2
- South of Sambre-Meuse: 3
- Morning: Rain in the center; sleet or snow in the east; sunny spells in the west.
- Afternoon: Variable skies with occasional sunny spells.
- Next night: Rainy.
Probable trend (according to Ensembles & ECMWF):
Sunday, December 15: 3/9°C
National precipitation range (L/m²): 4-7
- Periods of rain or showers.
Monday, December 16: 2/8°C
National precipitation range (L/m²): 5-10
- Rain or showers; risk of sleet in the Ardennes.
Tuesday, December 17: 2/8°C
National precipitation range (L/m²): 2-6
- Light rain or showers; risk of sleet in the Ardennes.
Wednesday, December 18: 2/7°C
National precipitation range (L/m²): 2-3
- Little precipitation.
Thursday, December 19: 2/8°C
National precipitation range (L/m²): 2-10
- Rain or showers; risk of sleet in the Ardennes.
Friday, December 20: 2/8°C
National precipitation range (L/m²): 2-5
- Light rain or showers; risk of sleet in the 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 )