Press Release

Press Statement on Typhoon "KAMMURI"

29 November 2019

There are posts currently circulating online being shared in various social networking services stating the Typhoon “KAMMURI” will be hitting the country as a “Super Typhoon”. To prevent unwanted panic on the part of the public, we would like to make some clarifications.

The Joint Typhoon Warning Center (JWTC) OF THE United States uses 1 minute as wind averaging period for the estimation of maximum sustained winds near the center (MSW), while PAGASA and other meteorological centers in the Western North Pacific use the WMO recommended 10-minute averaging period. Shorter wind averaging periods yield higher wind estimates compared to longer averaging period. As such, MSW from JWTC are generally higher than PAGASA and other meteorological centers.

Meteorological centers use different thresholds for classifying tropical cyclones as Super Typhoon. Since May 2015, PAGASA classifies a tropical cyclone as Super Typhoon when 10-minute MSW exceeds 220 km/h. Meanwhile, JTWC’s Super Typhoon, when converted from 1 to 10-minute averaging, has MSW exceeding 185 km/h. This means that on a 10-minute averaging, JWTC has lover threshold for classifying Super Typhoon than PAGASA.

Based on latest available data, Typhoon “KAMMURI” (local name: Typhoon “TISOY”) is less likely to reach Super Typhoon category at this time, but this scenario is not yet ruled out as the Typhoon is forecast to steadily intensify before making landfall in Southern Luzon. Official information on this Typhoon is being released by PAGASA through the following official accounts:

Facebook: Dost_pagasa
Twitter: @dost_pagasa

The public is advised to undertake precautionary measures, continue monitoring for updates and remain vigilant against unofficial information coming from unverified sources.

Original Signed:

Chief, Weather Division

More Press Release

29 November 2019

There are posts currently circulating online being shared in various social net...

Read more
24 October 2019

For the past several days, strong to gale force northeasterly winds has prevailed over the seaboards of Northern Luzon due to the strengthening of the high pres...

Read more
07 October 2019

Recent observations and analysis showed that the general wind pattern has shifted from southwesterly to easterly. This signifies that the southwest monsoon seas...

Read more
19 September 2019

There are posts related to a “Haze Bulletin” allegedly issued by PAGASA that are currently
circulating online and being shared in variou...

Read more
09 August 2019

The weak El Niño which started since the last quarter of 2018 had ended. The warmer than average sea surface temperatures (SSTs) in the tropical Pacific Ocean h...

Read more
06 July 2019

Weak El Niño condition which started since the last quarter of 2018 had persisted in the central and eastern equatorial Pacific (CEEP). The warmer than average ...

Read more