Fifth storm this year makes landfall in the Netherlands; Hundreds of flights delayed
An average wind speed corresponding to wind force 9 was recorded in IJmuiden on Friday afternoon, officially marking the fifth storm of the year, Weeronline reported on Friday. Hundreds of flights were delayed at Schiphol due to the gusty weather. Meteorologists define an official storm as a condition where the average wind speed at one KNMI station at least reaches wind force 9 over an hour. Winds at level 9 on the Beaufort scale typically range from 75 to 88 km/h.