Synoptic assessment of weather models

Every day, KNMI meteorologists analyze and interpret the results of the Hirlam, ECMWF and Harmonie weather models. Below you can read their findings, particularly educational material for those who want to understand more about the weather on the maps and in the graphs.
 
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Short-term to + 48 hours | Guidance multi-day model review
 



Models overall rating up to +48 hours

Published: 28/10/2025 10.48 uur LT
 
Guidance model assessment for the Netherlands, the Dutch coastal waters and the North Sea, based on the HIRLAM run of 12 UTC and the other mentioned models and guides with associated run time.

Synopsis
A low above Scotland moves east and reaches Denmark next night. The corresponding occlusion is just northeast of the FIR and continues northeast. The cold front lies ONO-WZW oriented above the east and south of the country, continues south-east and continues to drag over Belgium tonight. To the southwest of Ireland, a wave is emerging this afternoon in this cold front, with the golf summit moving northeast along our coast Wednesday morning. As a result, the aforementioned front pulls back over our country next night and Wednesday morning as a heat front northeast, with ahead well flowing and barely recognizable back. The cold front draws Wednesday evening and the first part of the night to Thursday due to wave formation slowly east across the country. The cold front is followed by sharpening altitude trench.

Model assessment
EC has a southern (west) occlusion band with significantly more humility than Ha43. Ha43 is much better than current events. Furthermore, both Ha43 and EC turbulence-St calculate for the heat front, which underlines the high probability of this. Pascal opportunities also give a good picture of the cloud base. In terms of wind, the average wind in EC and Ha43 is reasonably consistent with current times, the outliers are overestimated.Attention

Wind
6-7 Bft in the coastal divisions, temporarily decreasing at the tractor back and behind the cold front of Wednesday evening.

View
Outside the precipitation well, in showers most moderate view. In the hot sectors at coalescent stroke also possibly bad again. Under (possible) low stratus there is a risk of loss of vision outside precipitation.

Temperature
No details.

Cloud
CB peaks this afternoon in the eastern part of the FIR FL100-150. Also at the cold front there is a chance of low Sc. Tonight for the heat front from formation of turbulence-St in the well flowed back, at the heat front also St and then at the cold front Wednesday evening and in the night to Thursday again an increasing chance of St. Then at the cold front mainly stratiform precipitation but on the front itself also embedded CBs with peaks possibly FL150-200.

Precipitation
At the cold front rain, followed by showers, decreasing in intensity. Wednesday morning, some rain at the heat front and rain on the cold front, where coastal convergence seems to occur. For the cold front out, the clouds of the southwest become thicker and rain falls from a package of layered clouds with a rather high base (heat-advection). At the cold front rain and some embedded showers.

valid until Wednesday 29 October 2025 24.00 local time



 

Guidance multi-day

Published: 28/10/2025 04.19 uur LT
 
Long term assessment by meteorologist

Synopsis
In the night to Thursday, a cold front travels east across our country, temporarily it becomes dry with a passing back in the course of Thursday. Afterwards, a complex lies to the northwest of our surroundings where sometimes a peripheral disturbance grazes our country, especially on Saturdays. Mostly there is a south to southwest current and supply of soft air. Halfway next week, a ridge builds up over Europe, causing disturbances to graze or at some distance from our country. Later in the week, however, this back seems to move east again.

Model assessment and uncertainties
Thursday is mainly dry due to the passing back. Then the probability of precipitation increases significantly again to 60-90% under the influence of the low northwest of our country. Due to the south to southwest wind direction, the temperature is around or slightly above the long-term average. On Friday, the temperatures for the frontal precipitation in the southeast can still rise to about 18 to 19 degrees. Saturday through Monday there is quite a bit of wind with a 30-60% chance of heavy winds. Next week, precipitation rates on Wednesdays and Thursdays will decrease to 40-50% due to the altitude back described above.

Multi-day Summary
Thursday dry and some sun, then variable. It's pretty soft.

EPS Period Summary
Variable and temperatures around or slightly above the long-term average.

Valid from Thursday 30 October to Tuesday 11 November

 

 

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