1870 Philippine Typhoon Season

The 1870 Philippine Typhoon Season was the first typhoon season Philippine Atmospheric Geophysical Astronomical Services Administration (PAGASA) started covering after its founding in 1868. This northwestern Pacific typhoon season had 14 recognized systems, 12 named storms and **8 tropical cyclones** entered the Philippine area of responsibility (PAR).

## June 1870

### Onset of rainy season

On June 24, 1870, PAGASA declared the onset of rainy season in the Type 1 climate areas of the Philippines.

## July 1870

### Tropical Depression Ambo (01W, Damrey)

On July 14, 1870, the low pressure area west of Mindoro developed into a monsoonal Tropical Depression **Ambo**. It was forecasted to move away from the Philippine landmass through time, and no tropical cyclone wind signals were hoisted. On July 15, 1870, TD Ambo has exited the PAR and has intensified into a tropical storm and had the international name "**Damrey**."

Ambo has peaked 55 kph (70 kph gusts, 1002 hPa) inside the PAR.

### Tropical Storm Butchoy (04W, Kirogi)

On July 22, 1870, the low pressure area that has been crossing Bicol Region and MIMAROPA has intensified into a monsoonal Tropical Depression **Butchoy** over the Calamian group of islands in Palawan. TCWS No. 1 was immediately hoisted over Calamian group of islands and Lubang island. The wind signals were eventually lifted as TD Butchoy moves further away. Before exiting PAR on July 24, 1870, TD Butchoy has intensified into a tropical storm and had the international name "**Kirogi.**"

Butchoy has peaked at 60 kph (75 kph gusts, 1000 hPa) inside the PAR. It killed 1 from the Philippines and caused minor damages.

### Typhoon Carina (03W, Haikui)

On July 24, 1870, Typhoon **Haikui** in the east of central Luzon has entered the PAR and was named Typhoon **Carina**. Forecasted to weaken after PAR entry, TY Carina also did a sharp recurve going towards outside of the PAR. No TCWSs were hoisted from TY Carina. On July 27, 1870, Carina weakened into a severe tropical storm and has exited the PAR.

Carina has peaked at 120 kph (145 kph gusts, 980 hPa) inside the PAR.

## August 1870

### Typhoon Dindo (08W, Sanba)

On August 24, 1870, after a month of storm-less PAR, Typhoon **Sanba** in the east of extreme northern Luzon has entered the PAR in its northeastern corner and was named Typhoon **Dindo**. Just hours after its PAR entry, TY Dindo exited the PAR on August 25, 1870 and headed towards southern Japan.

It has peaked at 160 kph (195 kph gusts, 959 hPa) inside the PAR.

### Typhoon Enteng (09W, Jelawat)

On August 24, 1870, Typhoon **Jelawat** just south of Typhoon Sanba and east of southern Luzon has entered the PAR and was named Typhoon **Enteng**. Upon PAR entry, TY Enteng generally moved polewards following Typhoon Sanba. It enhanced the southwest monsoon in the country. TY Enteng exited the PAR on August 28, 1870.

It has peaked at 185 kph (220 kph gusts, 948 hPa) inside the PAR.

## September 1870

No tropical cyclones entered the area of responsibility during this month.

## October 1870

### Tropical Storm Ferdie (11W, Maliksi)

On October 8, 1870, the low pressure area off coast Catanduanes has developed into Tropical Depression **Ferdie**. TCWS No. 1 was immediately hoisted in most of Bicol region and GMMA. Moving off coast Camarines Norte, TD Ferdie further intensified into a tropical storm and had the international name "**Maliksi**." TCWS No. 2 was raised in Metro Manila and nearby provinces. Hoisting of TCWS No. 1 has expanded reaching Pangasinan to the north and Mindoro to the south. Moving directly over Metro Manila, Ferdie has weakened into a tropical depression and areas under TCWS shrank. TD Ferdie generally moved westwards and has further weakened into a remnant low pressure area while being a couple of hundred of kilometers west of Bataan.

Ferdie has peaked at 65 kph (80 kph gusts, 1001 hPa) inside the PAR. It killed 13 from Bicol, Southern Luzon and Central Luzon and caused minimal damages.

### Tropical Depression Gener (12W)

On October 12, 1870, the low pressure area off coast Northern Samar has developed into Tropical Depression **Gener**. TCWS No. 1 was immediately hoisted in some parts of Visayas and in entire Bicol Region. Gener ravaged the same areas TS Ferdie affected days ago. While in the vicinity of Marinduque, Gener has weakened into a remnant low pressure area.

Gener has peaked at 55 kph (70 kph gusts, 1003 hPa) inside the PAR. It killed 11 from Visayas and Bicol and caused minimal damages.

## November 1870

### Tropical Storm Helen (14W, Prapiroon)

On November 14, 1870, the low pressure area east of Dinagat Islands has developed into a compact Tropical Depression **Helen**. It generally moved west-northwestwards heading to Samar island. Before its landfall, Helen intensified into a tropical storm and had its international name "**Prapiroon**." TCWS Nos. 1 and 2 were hoisted in some parts of Visayas and Bicol Region. TS Helen made landfall in Eastern Samar following its weakening to a tropical depression. While in the vicinity of Masbate, Helen weakened into a remnant low pressure area.

Helen has peaked at 65 kph (80 kph gusts, 1000 hPa) inside the PAR. No deaths and damages were reported.

## December 1870

### PAGASA Press Conference

For the 1870 Philippine typhoon season, PAGASA officially recognizes **Typhoon Carina** has been the strongest typhoon to enter PAR, and **Tropical Storm Ferdie** being the deadliest and costliest to hit the country. PAGASA also confirms they are not decommissioning any local names for 1870.