1970 Western Pacific typhoon season
Typhoon Hope 1970
Typhoon Hope remained over the western Pacific throughout its September 1970 lifetime. It intensified east of the Mariana Islands, curved north toward Japan's latitude and then turned east without a recorded landfall.
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173 mph
Sep 24, 1970 during the tropical stage
Full archive record, including non-tropical stages if present
Along the recorded center positions
STORM HISTORY
Westward development from the central Pacific
Hope's archived track begins near the Marshall Islands on 18 September. The storm traveled west, then bent northwest as it strengthened. It reached peak one-minute winds of 150 kt and a minimum central pressure of 900 hPa on 24 September.
The peak occurred over open water east of the Mariana Islands. Hope then turned more sharply north and began weakening. Its center remained southeast of Japan as the route curved away from the islands.
An eastward curve over open water
Hope retained typhoon winds for several days while moving east across the Pacific. Near the end of its lifetime, the track bent southeast and then southwest as winds fell below typhoon strength. The archive ends on 30 September, with no recorded center position over land.
Further reading
QUICK ANSWERS
Hope in brief
What was Typhoon Hope's highest wind speed?
173 mph, the highest one-minute sustained wind in its tropical stage, recorded on Sep 24, 1970, 12:00 AM UTC.
What category was Typhoon Hope?
Category 5 at its peak on the Saffir–Simpson one-minute wind scale, first reaching Category 5 on Sep 23, 1970, 09:00 PM UTC. Other agencies classify storms differently.
What was Typhoon Hope's lowest pressure?
900 mb, the minimum central pressure recorded during its tropical stage, on Sep 24, 1970, 12:00 AM UTC.
When did Typhoon Hope occur?
The archived track runs from Sep 18, 1970, 12:00 PM UTC to Sep 30, 1970, 12:00 PM UTC, with the tropical stage from Sep 18, 1970, 12:00 PM UTC to Sep 30, 1970, 09:00 AM UTC.
Where did Typhoon Hope form?
In the Western Pacific basin, in the 1970 season. Its first archived position is 13.2°N, 175°E on Sep 18, 1970, 12:00 PM UTC.
Did Typhoon Hope make landfall?
No archived position places Typhoon Hope's center over land, but positions are six-hourly and a brief landfall can fall between them.
METHODOLOGY
Data sources and limitations
The map and summary are generated from NOAA's IBTrACS v04r01 archive. Wind and category use US-agency records; minimum pressure is calculated during the tropical stage, with the archive's pressure source retained. Category 5 refers to the Saffir–Simpson one-minute wind scale; local agencies may use different classifications. Coastlines use Natural Earth's 1:10m land data.
Track distance adds great-circle distances between consecutive observations, excluding gaps over 12 hours. This track has no gaps over 12 hours. The line shows the storm's center, not its size, rainfall or flood extent. Converted wind speeds are rounded to the nearest whole unit.
Archive retrieved
NOAA IBTrACS archive and Field documentation
Sources & methodology