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Tropical Storm Hagupit Passes North of Palau

Tropical Storm Hagupit passed north of Palau on Saturday.  At 11:00 p.m. EDT on Saturday the center of Tropical Storm Hagupit was located at latitude 10.4°N and longitude 132.9°E which put the center about 220 miles (355 km) north-northwest of Koror, Palau.  Hagupit was moving toward the northwest at 10 m.p.h. (16 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 1004 mb.

Tropical Storm Hagupit maintained its intensity while it passed north of Palau on Saturday.  Even though Tropical Storm Hagupit maintained its maximum wind speed, some of the thunderstorms in Hagupit’s circulation dissipated.  Thunderstorms were still occurring in bands in the eastern side of Tropical Storm Hagupit.  Bands in the western side of Hagupit’s circulation consisted primarily of showers and lower clouds.  Thunderstorms near the center of Hagupit generated less upper level divergence that pumped less mass away from the tropical storm.  The removal of less mass caused the surface pressure to increase.

Tropical Storm Hagupit will move into an environment that will be unfavorable for intensification during the next 24 hours.  Hagupit will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern end of an upper level trough that is south of Japan.  The upper level trough will produce westerly winds that will blow toward the top of Hagupit’s circulation.  Those winds will cause more vertical wind shear.  Tropical Storm Hagupit is likely to weaken to a tropical depression on Sunday.

Tropical Storm Hagupit will move around the southwestern part of a high pressure system over the Western North Pacific Ocean.   The high pressure system will steer Hagupit toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Hagupit will move farther away from Palau.

Tropical Storm Hagupit Produces Gusty Winds on Yap

Tropical Storm Hagupit produced gusty winds on Yap on Friday.  At 5:00 p.m. EDT on Friday the center of Tropical Storm Hagupit was located at latitude 8.8°N and longitude 136.6°E which put the center about 90 miles (145 km) southwest of Yap.  Hagupit was moving toward the west at 10 m.p.h. (16 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 1002 mb.

Even though the center of Tropical Storm Hagupit passed south of Yap on Friday, Hagupit still produced gusty winds on Yap.  A weather station at the Yap International Airport (PTYA) reported a wind gust of 40 m.p.h. (65 km/h) on Friday.

Tropical Storm Hagupit weakened a little on Friday.  Some of the thunderstorms in bands in the western half of Hagupit’s circulation dissipated.  Numerous thunderstorms were still occurring in bands in the eastern side of Tropical Storm Hagupit.  Thunderstorms near the center of Hagupit generated a little less upper level divergence that pumped less mass away from the tropical storm.  The removal of less mass caused the surface pressure to increase.

The strongest winds were occurring in the northeastern part of Tropical Storm Hagupit.  Winds to tropical storm force extended out 85 miles (135 km) in the northeastern quadrant of Hagupit’s circulation.  The winds in the other parts of Tropical Storm Hagupit were blowing at less than tropical storm force.

Tropical Storm Hagupit will move into an environment that will become more unfavorable for intensification during the next 24 hours.  Hagupit will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern end of an upper level trough that is south of Japan.  The upper level trough will produce westerly winds that will blow toward the top of Hagupit’s circulation.  Those winds will cause the vertical wind shear to increase.  Tropical Storm Hagupit will weaken when the vertical wind shear increases.

Tropical Storm Hagupit will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Hagupit toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Hagupit will move away from Yap.  Hagupit will pass north of Palau during the weekend.

Tropical Storm Hagupit will continue to produce gusty winds on Yap during the next few hours until Hagupit moves farther away,  Hagupit will also bring passing showers and thunderstorms to Yap.  Locally heavy rainfall could cause flash floods in some locations.

Tropical Storm Hagupit Approaches Yap

Tropical Storm Hagupit was approaching Yap on Thursday night.  At 11:00 p.m. EDT on Thursday the center of Tropical Storm Hagupit was located at latitude 8.6°N and longitude 139.5°E which put the center about 145 miles (230 km) east-southeast of Yap.  Hagupit was moving toward the west-northwest at 15 m.p.h. (24 km/h).  The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (80 km/h).  The minimum surface pressure was 999 mb.

Tropical Storm Hagupit was intensifying as it approached Yap on Thursday night.  More thunderstorms were developing near the center of Hagupit’s circulation.  Bands of showers and thunderstorms were revolving around the center of Tropical Storm Hagupit.  Storms near the center of Hagupit generated more upper level divergence that pumped mass away from the tropical storm.  The removal of more mass caused the surface pressure to decrease.

Even though Tropical Storm Hagupit was intensifying, the distribution of wind speeds continued to be asymmetrical.  Winds to tropical storm force extended out 110 miles (175 km) in the northern side of Hagupit’s circulation.  The winds in the southern half of Tropical Storm Hagupit were blowing at less that tropical storm force.

Tropical Storm Hagupit will move through an environment favorable for intensification during the next 24 hours.  Hagupit will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern part of an upper level ridge that is over the Western North Pacific Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of Hagupit’s circulation.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  Tropical Storm Hagupit will intensify during the next 24 hours.

Tropical Storm Hagupit will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Hagupit toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Hagupit will reach Yap within 12 hours.

Tropical Storm Hagupit will bring strong winds and locally heavy rain to Yap.  Heavy rain could cause flash floods in some locations.  Tropical Storm Hagupit could cause a storm surge of up to 6 feet (1.8 meters) along the coast of Yap.

Tropical Storm Hagupit Passes South of Guam

Tropical Storm Hagupit passed well to the south of Guam on Wednesday night.  At 5:00 a.m. EDT on Thursday the center of Tropical Storm Hagupit was located at latitude 7.2°N and longitude 142.5°E which put the center about 355 miles (575 km) east-southeast of Yap.  Hagupit was moving toward the west at 9 m.p.h. (15 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 1001 mb.

Tropical Storm Hagupit exhibited a little more organization on Thursday morning.  Thunderstorms were once again forming in bands in all parts of Hagupit’s circulation.  Thunderstorms near the center of Hagupit generated more upper level divergence that pumped mass away from the tropical storm.  The removal of more mass caused the surface pressure to decrease slightly.

Even though Tropical Storm Hagupit looked more organized on satellite images, the distribution of wind speeds continued to be asymmetrical.  Winds to tropical storm force extended out 115 miles (185 km) in the northern side of Hagupit’s circulation.  The winds in the southern half of Tropical Storm Hagupit were blowing at less that tropical storm force.

Tropical Storm Hagupit will move through an environment favorable for intensification during the next 24 hours.  Hagupit will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern part of an upper level ridge that is over the Western North Pacific Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of Hagupit’s circulation.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  Tropical Storm Hagupit will intensify slowly during the next 24 hours.

Tropical Storm Hagupit will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Hagupit toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Hagupit will approach Yap in 24 hours.

Tropical storm Hagupit will bring strong winds and locally heavy rain to Yap.  Heavy rain could cause flash floods in some locations.

Depression Strengthens to Tropical Storm Hagupit

Former Tropical Depression 05W strengthened to Tropical Storm Hagupit over the Western North Pacific Ocean south of the Marianas on Tuesday night.  At 5:00 a.m. EDT on Wednesday the center of Tropical Storm Hagupit was located at latitude 7.4°N and longitude 146.5°E which put the center about 435 miles (705 km) south-southeast of Guam.  Hagupit was moving toward the west at 7 m.p.h. (11 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 1003 mb.

Former Tropical Depression 05W strengthened on Tuesday night and the Japan Meteorological Agency designated the system as Tropical Storm Hagupit.

Thunderstorms continued to develop near the center of Tropical Storm Hagupit.  However, the distribution of thunderstorms around the rest of Hagupit’s circulation became a little more asymmetrical during the past 12 hours.  Thunderstorms were still occurring in bands in the eastern side of Tropical Storm Hagupit.  Bands in the western side of Hagupit’s circulation consisted primarily of showers and lower clouds.  Storms near the center of Hagupit generated some upper level divergence that pumped mass away from the tropical storm.  The removal of mass in the upper levels was nearly matched by the inflow of mass in the lower levels of the atmosphere.  So, the surface pressure was not changing much.

The distribution of wind speeds in Tropical Storm Hagupit was also asymmetrical.  Winds to tropical storm force extended out 100 miles (160 km) in the northeastern quadrant of Hagupit’s circulation.  The winds in the other parts of Tropical Storm Hagupit were blowing at less than tropical storm force.

Tropical Storm Hagupit will move through an environment favorable for intensification during the next 24 hours.  Hagupit will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern part of an upper level ridge that is over the Western North Pacific Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of Hagupit’s circulation.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  Tropical Storm Hagupit will intensify slowly during the next 24 hours.  Hagupit could strengthen to a typhoon later this week.

Tropical Storm Hagupit will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Hagupit toward the west during the next 24 hours.  On its anticipated track, Tropical Storm Hagupit will pass south of Guam.  Hagupit could approach Yap in 48 hours.  Hagupit will likely be a tropical storm when it approaches Yap.

Tropical Depression 05W Forms Southeast of the Marianas

Tropical Depression 05W formed over the Western North Pacific Ocean southeast of the Marianas on Tuesday.  At 5:00 p.m. EDT on Tuesday the center of Tropical Depression 05W was located at latitude 8.4°N and longitude 147.8°E which put the center about 100 miles (160 km) north-northwest of Puluwat.  Tropical Depression 05W was moving toward the west at 8 m.p.h. (13 km/h).  The maximum sustained wind speed was 35 m.p.h. (55 km/h) and there were wind gusts to 45 m.p.h. (75 km/h).  The minimum surface pressure was 1003 mb.

A low pressure system over the Western North Pacific Ocean southeast of the Marianas strengthened on Tuesday.  Both the Japan Meteorological Agency and the U.S. Joint Typhoon Warning Center designated the system as a tropical depression.

More thunderstorms formed near the center of Tropical Depression 05W on Tuesday afternoon.  More thunderstorms also developed in bands revolving around the center of the tropical depression.  Storms near the center of circulation started to generate upper level divergence that pumped mass away from the tropical depression.  The removal of mass caused the surface pressure to decrease.

Tropical Depression 05W will move through an environment favorable for intensification during the next 24 hours.  The tropical depression will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern part of an upper level ridge that is over the Western North Pacific Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of the tropical depression.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  Tropical Depression 05W will intensify to a tropical storm during the next 24 hours.  It could strengthen to a typhoon later this week.

Tropical Depression 05W will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer the tropical depression toward the west during the next 24 hours.  On its anticipated track, Tropical Depression 05W will pass south of Guam.  The tropical depression could approach Yap in 36 hours.  It will likely be a tropical storm when it approaches Yap.

Tropical Storm Danas Drops Rain on Eastern China

Tropical Storm Danas dropped rain on eastern China on Tuesday.  At 5:00 p.m. EDT on Tuesday the center of Tropical Storm Danas was located at latitude 27.6°N and longitude 120.3°E which put the center about 50 miles (80 km) southwest of Wenzhou, China.  Danas was moving toward the west-southwest at 6 m.p.h. (10 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 986 mb.

The center of Tropical Storm Danas made landfall on the east coast of China just to the south of Wenzhou on Tuesday.  The maximum sustained wind speed was 40 m.p.h. (65 km/h) at the time of landfall.  Winds to tropical storm force extended out 120 miles (195 km) from the center of Danas’ circulation.

Tropical Storm Danas will move around the southern side of a high pressure system over eastern Asia.  The high pressure system will steer Danas toward the southwest during the next 24 hours.  On its anticipated track, Tropical Storm Danas will move farther inland over eastern China.

Tropical Storm Danas will weaken gradually as it moves inland over eastern China.  The heaviest rain will be produced by bands in the southern side of Danas’ circulation.  Bands in the northern side of Tropical Storm Danas will consist primarily of showers and lower clouds.

Tropical Storm Danas will drop heavy rain over parts of Zhejiang.  Heavy rain could cause floods in some locations.

The strongest winds will occur in the eastern side of Danas’ circulation which will be over the East China Sea.  Most of the winds over land will be at less than tropical storm force.

Tropical Storm Danas Nears Eastern China

Tropical Storm Danas was nearing eastern China on Monday evening.  At 11:00 p.m. EDT on Monday the center of Tropical Storm Danas was located at latitude 28.1°N and longitude 122.0°E which put the center about 80 miles (130 km) east of Wenzhou, China and about 50 miles (80 km) southeast of Taizhou, China.  Danas was moving toward the north at 6 m.p.h. (10 km/h).  The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h).  The minimum surface pressure was 992 mb.

Even though Tropical Storm Danas was over the East China Sea on Monday, Danas’ circulation was still disrupted from the affects of its passage over Taiwan on Sunday.  The distribution of thunderstorms in Tropical Storm Danas was asymmetrical.  Thunderstorms were occurring in bands in the southern part of Danas’ circulation.  Bands in the northern side of Tropical Storm Danas consisted primarily of showers and lower clouds.

Winds to tropical storm force extended out 90 miles (145 km) from the center of Tropical Storm Danas.

Tropical Storm Danas will move through an environment that will be somewhat favorable for intensification during the next few hours. Danas will move over water where where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge over East China Sea.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Even though Tropical Storm Danas will move through a somewhat favorable environment, Danas may not intensify because of the disruption of its circulation during the passage over Taiwan.

Tropical Storm Danas will move around the southern side of a high pressure system over eastern Asia.  The high pressure system will steer Danas toward the west during the next 24 hours.  On its anticipated track, Tropical Storm Danas will move over eastern China in a few hours.

The center of Tropical Storm Danas is likely to make landfall in China between Taizhou and Wenzhou.  Danas will bring gusty winds and locally heavy rain to Zhejiang.  Heavy rain could cause floods in some locations.

Typhoon Danas Brings Wind and Rain to Taiwan

Typhoon Danas brought strong winds and heavy rain to Taiwan on Sunday.  Danas weakened to a tropical storm after it moved across Taiwan.  At 11:00 p.m. EDT on Sunday the center of Tropical Storm Danas was located at latitude 25.9°N and longitude 121.6°E which put the center about 30 miles (50 km) north-northwest of Taipei, Taiwan.  Danas was moving toward the north-northeast at 22 m.p.h. (35 km/h).  The maximum sustained wind speed was 50 m.p.h. (80 km/h) and there were wind gusts to 65 m.p.h. (105 km/h).  The minimum surface pressure was 989 mb.

The center of former Typhoon Danas moved north-northeast across western Taiwan on Sunday.  Danas produced strong winds and heavy rains as it moved across Taiwan.  The heaviest rain fell in parts of southern Taiwan and in a few mountain areas where the winds were blowing up the slopes.  The Central Weather Administration’s radar estimated that up to a foot (300 mm) of rain fell in some locations.

Former Typhoon Danas weakened to a tropical storm as it moved across western Taiwan.  The center of Danas’ circulation moved over the East China Sea on Sunday night.  Thunderstorms were still occurring near the center of Tropical Storm Danas.  Thunderstorms were also still occurring in bands revolving around the center of Danas’ circulation.

The distribution of wind speeds in Tropical Storm Danas was asymmetrical.  Winds to tropical storm force extended out 175 miles (280 km) in the eastern side of Danas’ circulation.  Winds to tropical storm force extended out 80 miles (130 km) in the western side of Danas.

Tropical Storm Danas will move through an environment that will be somewhat favorable for intensification during the next 24 hours.  Danas will move over water where where the Sea Surface Temperatures are near 29°C.  It will move under the eastern side of an upper level low over eastern China.  The upper level low will produce southwesterly winds that will blow toward the top of Danas’ circulation.  Those winds will cause moderate vertical wind shear.  The wind shear will inhibit intensification, but the shear may not be enough to prevent intensification.  Tropical Storm Danas could intensify during the next 24 hours.

The upper level low over eastern China will steer Tropical Storm Danas toward the north-northeast during the next 24 hours.  On its anticipated track, Danas will move away from Taiwan.  Tropical Storm Danas could approach the east coast of China in 36 hours.

Wind speeds will decrease in Taiwan when Tropical Storm Danas moves farther away.  Heavy rain should also diminish as the circulation around Danas moves away from Taiwan.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Mun weakened east of Japan.  At 11:00 p.m. EDT on Sunday the center of Tropical Storm Mun was located at latitude 35.5°N and longitude 148.7°E which put the center about 520 miles (835 km) east of Tokyo, Japan.  Mun was moving toward the north-northwest at 12 m.p.h. (19 km/h).  The maximum sustained wind speed was 50 m.p.h. (80 km/h) and there were wind gusts to 65 m.p.h. (105 km/h).  The minimum surface pressure was 986 mb.

Typhoon Danas Hits Taiwan

Typhoon Danas hit Taiwan on Sunday.  At 11:00 a.m. EDT on Sunday the center of Typhoon Danas was located at latitude 23.5°N and longitude 120.0°E which put the center about 75 miles (120 km) southwest of Taichung, Taiwan.  Danas was moving toward the northeast at 13 m.p.h. (21 km/h).  The maximum sustained wind speed was 105 m.p.h. (165 km/h) and there were wind gusts to 125 m.p.h. (200 km/h).  The minimum surface pressure was 958 mb.

Typhoon Danas rapidly intensified to the equivalent of a Category 2 hurricane on the Saffir-Simpson Scale as it approached Taiwan on Sunday.  The inner end of a rainband wrapped around the center of Danas’ circulation.  A circular eye with a diameter of 16 miles (26 km) formed at the center of Typhoon Danas.  Other bands of showers and thunderstorms were revolving around the core of Danas’ circulation.

The size of the circulation around Typhoon Danas increased when Danas rapidly intensified.  Winds to typhoon force extended out 35 miles (55 km) from the center of Danas’ circulation.  Winds to tropical storm force extended out 160 miles (260 km) in the eastern side of Typhoon Danas.  Winds to tropical storm force extended out 85 miles (135 km) in the western side of Danas.

The Hurricane Intensity Index (HII) for Typhoon Danas is 17.8.  The Hurricane Size Index (HSI) is 14.4 and the Hurricane Wind Intensity Size Index (HWISI) is 32.2.  Typhoon Danas is similar in size and intensity to Hurricane Sally when Sally hit Alabama in 2020.

Typhoon Danas will bring strong, gusty winds and heavy rain to Taiwan.  Heavy rain is likely to cause flash floods and mudslides.  Widespread outages of electricity are possible.  Typhoon Danas could also cause a storm surge of up to 10 feet (3 meters) along parts of the coast of Taiwan.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Mun continued to churn east of Japan.  At 11:00 a.m. EDT on Sunday the center of Tropical Storm Mun was located at latitude 33.9°N and longitude 149.4°E which put the center about 545 miles (875 km) east of Tokyo, Japan.  Mun was moving toward the north at 9 m.p.h. (15 km/h).  The maximum sustained wind speed was 60 m.p.h. (95 km/h) and there were wind gusts to 75 m.p.h. (120 km/h).  The minimum surface pressure was 982 mb.