Along the Gulf and Atlantic coasts, on the average, about five hurricanes make landfall every three years, two of which are major hurricanes with winds in excess of 95 knots (110 mi/hr). However, the number of hurricanes in the North Atlantic varies greatly from year to year and even decade to decade. The activity appears to be enhanced for periods of roughly 25 to 35 years in connection with the warm phase of the ___________________ _, which influences water temperatures in the tropical North Pacific where hurricanes most often develop.
Fill in the blank with correct word.
Question 2
In the Northwest Pacific, a typhoon with sustained winds of at least 130 knots (150 mi/hr) is designated a(n) ___________________ _.
Fill in the blank with correct word.
