Ensemble guidance from ECMWF and GFS for Amsterdam on April 28th robustly points to a sub-climatological maximum. Current extended-range prognostics consistently show persistent cyclonic activity over the North Sea, dictating a dominant northwesterly flow. This advects cool, moist maritime polar air, while elevated geopotential heights foster significant low-level cloud potential, critically suppressing solar insolation and capping the diurnal temperature rise. ICON models corroborate, placing the 70th percentile probability mass below the 14°C isotherm. Considering the climatological average maximum for AMS in late April is 14-16°C, this thermodynamic setup makes breaching the 13°C threshold highly improbable. Sentiment: Local meteorologists are highlighting a 'stubborn cool spell' extending into the period.
Ensemble guidance from ECMWF and GFS for Amsterdam on April 28th robustly points to a sub-climatological maximum. Current extended-range prognostics consistently show persistent cyclonic activity over the North Sea, dictating a dominant northwesterly flow. This advects cool, moist maritime polar air, while elevated geopotential heights foster significant low-level cloud potential, critically suppressing solar insolation and capping the diurnal temperature rise. ICON models corroborate, placing the 70th percentile probability mass below the 14°C isotherm. Considering the climatological average maximum for AMS in late April is 14-16°C, this thermodynamic setup makes breaching the 13°C threshold highly improbable. Sentiment: Local meteorologists are highlighting a 'stubborn cool spell' extending into the period.
