Beaufort scale the extension to 17 noted above. China also switched to this extended version without prior notice on the morning of 15 May 2006, and the extended scale was immediately put to use for Typhoon Chanchu. Hong Kong and Macau retain force 12 as the maximum. In the United States, winds of force 6 or 7 result in the issuance of a small craft advisory, with force 8 or 9 winds bringing about a gale warning, force 10 or 11 a storm warning ("a tropical storm warning" being issued instead of the latter two if the winds relate to a tropical
1887 Halloween tropical storm the storm was in Virginia. Cape Henry was hit with a combination of wind, rain, and blown sand on October 31 and communications between Cape Henry and Norfolk were lost. In Norfolk, the storm was the longest-lasting and most damaging since the Great Beaufort Hurricane of 1879. The storm conditions made beaches in the area so hazardous that they were watched day and night. Effects from the storm reached as far north as Provincetown, Massachusetts, where winds of were recorded. Despite causing damage along the East Coast, the storm is best known for causing a record number of maritime incidents.