Tropical Storms formed in the entire west Pacific basin were assigned a name by the Joint Typhoon Warning Center.

Nancy originated from the interaction between an active ITCZ and a cold front near the Caroline Islands and the equator in mid February.

An increase in convection was shown by weather satellites on February 18 and by the following day a recon aircraft found a weak depression to the south of the Caroline Islands.

The depression moved west, suppressed south by a high pressure ridge to the north, and gradually strengthened into a tropical storm and was given the name Nancy early on February 20.

Continuing to encounter more favorable conditions Nancy was able to achieve a peak intensity of 140 mph (220 km/h) and a pressure of 952 hPa (28.1 inHg) on February 24.

It is rare to have a typhoon of this magnitude during the month of February, as noted by the JTWC, only Irma of the 1953 season reached the same intensity at the time.

As Nancy approached the Philippine Islands the typhoon traversed to the western ambit of the ridge that had kept it to the south, allowing it to move farther in a north direction.

[2] In mid-June a change in the jet stream over a large part of the Pacific Ocean caused an increase in tropical wave frequency; one becoming the precursor to Olga.

As it moved west weather satellites depicted the wave had begun to organize with considerable convection and spiraling storm bands as it neared the Central Caroline Islands.

Due to the waves close proximity to a high pressure area to the north, strong easterlies accelerated it to the west.

Later that day reconnaissance found a closed center and gale-force winds, prompting the JTWC to upgrade the low into a tropical storm and was given the name Olga.

As it entered the Philippine Sea the ridge that had kept it to the south began to weaken allowing Olga to move in a northwestward direction.

As Olga entered an increasingly favorable environment, the storm slowed its forward speed and strengthened into a typhoon late on June 29.

[3] The rapid 62 millibar drop between June 30 and July 1 caused an intense wind profile surrounding the small eye.

As Olga was passing to the east of Taiwan a short wave from the China mainland gave an eastward component to the storm's motion.

Having greatly weakened after landfall, Pamela degenerated into a remnant low and dissipated over the South China Sea on July 1, just as Category 5 Super Typhoon Olga reached its peak.

07W generally moved westward, passing the PAR or Philippine Area of Responsibility, bringing rainfall in Taiwan, and hitting Eastern China.

Due to its relatively weak intensity and offshore track, Tropical Depression 07W (Gading) did not cause any significant impact on land areas but still bringing rainfall.

It formed as a disturbance on the 30th, then turned northwestward and became a tropical storm, before undergoing extratropical transition and dissipating over the Bering Sea.

It intensified while heading northwards, becoming a tropical storm on the 23rd, a typhoon on the 25th, and reaching its maximum intensity of 110-knot winds and a 945-millibar central pressure as it passed the Ryukyu Islands on the 27th.

Tropical Storm Clara developed on August 26 southeast of Japan from an upper tropospheric circulation that separated from the Mid-Pacific trough.

Georgia did not drop a lot of rain during its passage through the Philippines, but its strong winds caused 95 casualties (with 80 missing) and damage at $1.4 million (1970 USD).

It intensified while slowly traveling northwards, reaching its maximum intensity on the afternoon of the 6th while 140 miles south of Hong Kong.

[2] The remnants of Nora then crossed the Malay Peninsula on the 5th, and contributed to the formation of the 1970 Bhola cyclone on the 8th, which devastated East Pakistan (Modern day Bangladesh).

It intensified into a tropical storm as it turned southwestward over the South China Sea, passing close to Vietnam, but it dissipated southeast of the Mekong Delta.

Its inflow became disrupted by the Philippines to its west, and Patsy hit Luzon on the 19th with winds of 130 mph, making it the 3rd strong typhoon since September to strike the island.

The Philippine Atmospheric, Geophysical and Astronomical Services Administration uses its own naming scheme for tropical cyclones in their area of responsibility.

This table will list all the storms that developed in the northwestern Pacific Ocean west of the International Date Line and north of the equator during 1970.

It will include their intensity, duration, name, areas affected, deaths, missing persons (in parentheses), and damage totals.

Classification and intensity values will be based on estimations conducted by the JMA, however due to lack of information around this time sustained winds were recorded by the JTWC.