All of the available records of this kind were consulted in due time by the men who were assigned to the perilous duty of flying military planes into the vortices of hurricanes in the West Indies and into typhoon centers in the Pacific. But one of the best of these reports—of weather and sea conditions observed on many ships caught at the same time in the central region of a big typhoon—was not available until long after it happened. The Japanese kept it secret for seventeen years.
The reason for keeping the data secret was the fact that while on grand maneuvers, the RED Imperial Japanese Fleet was outmaneuvered by a pair of typhoons and was caught in the center of one of them and severely damaged. It happened in 1935 and was not reported for publication in America until 1952.
Just how this happened is not altogether clear. It was in the middle of September, 1935, when the first typhoon appeared, northwest of the island of Saipan. It increased in fury as it moved slowly toward Japan. On the twenty-fifth it crossed western Honshu and roared into the Sea of Japan, headed northeastward in the direction of the Japanese Fleet. Soon after this, it dissipated. Before it weakened, however, another typhoon had formed near Saipan and started toward Japan. It turned more to the northward than the first typhoon and missed Japan altogether. As it approached Honshu, late on the twenty-fifth, the RED Imperial Fleet was passing through the Strait of Tsugaru into the Pacific—squarely in front of the typhoon center.
The logical explanation for this apparent blunder is that the commanders wanted more sea room than was at hand in the northeast Sea of Japan to maneuver in the first typhoon and hoped to get well out in the open Pacific before they could be cornered by the second one. But it turned northeastward and went faster and farther out in the Pacific than they had expected. In fact, its forward motion was more than forty miles an hour in these last hours before its furious winds surrounded the fleet.
It was a bad calculation for the naval commanders and perhaps for the weather forecasters. Among the latter, H. Arakawa, one of the foremost typhoon students in Japan, was then on the staff of forecasters in the Central Meteorological Observatory in Tokyo. He was in part responsible for the predictions. In 1952 he made the report which was published by the U. S. Weather Bureau early in 1953. Taking the view of the weatherman, Arakawa said that although the damage to the fleet was unfortunate, there was fortunately a magnificent collection of reports from the central region of the typhoon for scientific study.
The fleet was caught in the central part of the big storm on the twenty-sixth of September. Among the ships involved, many of them damaged, were destroyers, cruisers, aircraft carriers, a seaplane carrier, mine-layers, transport ships, submarines, torpedo boats, and a submarine depot ship. The fleet suffered damage mostly from the tremendous waves in the right rear quadrant of the typhoon. Here the rapid forward motion of the storm was added to the wind circulation and the seas were driven to excessive heights. In his report, Arakawa had a footnote: “The bows of two destroyers, Hatsuyuki and Yugiri, were broken off as a result of excessive storm waves, and many officers and sailors were lost.”
In the calm center, the clouds broke and faint sunlight came through. The diameter of the eye was nine or ten miles. To the right of the eye, some of the waves measured more than sixty feet in height. The maximum roll of the ships in this area—the total angle from port to starboard—reached 75° on some of the ships. The wind was steadily above eighty miles an hour; the gusts were not measured but probably went as high as 125 miles an hour.
Many of the ships took frequent observations while in the typhoon and the data would have been extremely valuable if released to the storm hunters at that time, but when the report was published in 1953 a great deal of new data had been obtained by airplane, both at the surface—where Arakawa’s observations were confined—and at higher levels. It was a little more than nine years after this Japanese incident when the U. S. Third Fleet was caught in a typhoon east of the Philippines and suffered at least as much damage as the Japanese in 1935.
One fact is clear. For many years the storm hunters had been gathering information about hurricane and typhoon centers from observations on land and sea but they knew very little of what went on there in the upper air. World War II brought a new era.