Monthly Archives: October 2025

Tropical Storm Jerry Forms East of Leeward Islands

Tropical Storm Jerry formed east of the Leeward Islands on Tuesday morning.  At 11:00 a.m. EDT on Tuesday the center of Tropical Storm Jerry was located at latitude 11.5°N and longitude 44.6°W which put the center about 1315 miles (2120 km) east-southeast of the Northern Leeward Islands.  Jerry was moving toward the west at 24 m.p.h. (39 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 1006 mb.

A low pressure system over the tropical Atlantic Ocean east of the Leeward Islands strengthened on Tuesday morning and the U.S. National Hurricane Center designated the system at Tropical Storm Jerry.

Tropical Storm Jerry was strengthening on Tuesday morning.  More thunderstorms developed near the center of Jerry’s circulation.  Bands of showers and thunderstorms were revolving around the center of Tropical Storm Jerry.  Storms near the center of Jerry started to generate upper level divergence that pumped mass away from the tropical storm.

The strongest winds were occurring in the eastern side of Tropical Storm Jerry.  Winds to tropical storm force extended out 140 miles (225 km) from the center of Jerry’s circulation.   The winds in the western side of Tropical Storm Jerry were blowing at less than tropical storm force.

Tropical Storm Jerry will move through an environment favorable for intensification during the next 24 hours.  Jerry will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern side of an upper level ridge over the tropical Atlantic Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of Jerry’s circulation.  However, the winds in the lower levels of the atmosphere will also blow from the east.  So, there will be less vertical wind shear.  Tropical Storm Jerry will intensify during the next 24 hours.  Jerry is likely to strengthen to a hurricane later this week.

Tropical Storm Jerry will move around the southern side of a high pressure system over the Atlantic Ocean.  The high pressure system will steer Jerry quickly toward the west during the next 24 hours.  On its anticipated track, Tropical Storm Jerry will approach the Northern Leeward Islands on Thursday.

Typhoon Halong Intensifies to Equivalent of a Major Hurricane

Typhoon Halong intensified to the equivalent of a major hurricane over the Western North Pacific Ocean south of Japan on Tuesday morning.  At 11:00 a.m. EDT on Tuesday the center of Typhoon Halong was located at latitude 28.4°N and longitude 137.2°E which put the center about 490 miles (785 km) south-southwest of Tokyo, Japan.  Halong was moving toward the northwest at 8 m.p.h. (13 km/h).  The maximum sustained wind speed was 130 m.p.h. (210 km/h) and there were wind gusts to 160 m.p.h. (260 km/h).  The minimum surface pressure was 942 mb.

Typhoon Halong intensified to the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale on Tuesday morning.  A circular eye with a diameter of 40 miles (65 km) was at the center of Halong’s circulation.  The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the core of Typhoon Halong.  Storms near the core of Halong generated upper level divergence that pumped mass away from the typhoon in all directions.  The removal of large amounts of mass caused the surface pressure to decrease rapidly.

The circulation around Typhoon Halong was relatively small.  Winds to typhoon force extended out 30 miles (50 km) from the center of Halong’s circulation.  Winds to tropical storm force extended out 140 miles (225 km) from the center of Typhoon Halong.

The Hurricane Intensity Index (HII) for Typhoon Halong was 25.1.  The Hurricane Size Index (HSI) was 10.2 and the Hurricane Wind Intensity Size Index (HWISI) was 35.3.  Typhoon Halong was similar in size and intensity to Hurricane Harvey when Harvey hit Texas in 2017.

Typhoon Halong will move through an environment that is favorable for intensification during the next 24 hours.  Halong will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is south of Japan.  The upper level winds are weak near the middle of the upper level ridge and there will be little vertical wind shear.  Typhoon Halong will intensify during the next 24 hours.

Typhoon Halong will move around the western end of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Halong toward the north during the next 24 hours.  On its anticipated track, Typhoon Halong will move closer to Honshu.

Hurricane Priscilla Moves South of Baja California

Hurricane Priscilla moved south of Baja California on Monday night.  At 11:00 p.m. EDT on Monday the center of Hurricane Priscilla was located at latitude 19.1°N and longitude 108.5°W which put the center about 275 miles (445 km) south-southeast of the southern tip of Baja California.  Priscilla was moving toward the northwest at 9 m.p.h. (15 km/h).  The maximum sustained wind speed was 85 m.p.h. (135 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).  The minimum surface pressure was 972 mb.

A Tropical Storm Watch was in effect for the portion of the coast from Cabo San Lucas to Cabo San Lazaro, Mexico.

Hurricane Priscilla was showing evidence of intensification on Monday evening.  New tall thunderstorms were forming just to the south of the center of Priscilla’s circulation.  Microwave satellite imagery was indicating that an eye might be forming at the center of Hurricane Priscilla.  Bands of showers and thunderstorms were revolving around the center.  Storms near the center of Priscilla generated upper level divergence that pumped mass away from the hurricane.  The removal of mass caused the surface pressure to decrease.

The circulation around Hurricane Priscilla was very large.  Winds to hurricane force extended out 50 miles (80 km) in the eastern side of Priscilla’s circulation.  Winds to hurricane force extended out 25 miles (40 km) in the western side of Priscilla.  Winds to tropical storm force extended out 185 miles (295 km) from the center of Hurricane Priscilla.

Hurricane Priscilla will move through an environment favorable for intensification during the next 24 hours.  Priscilla will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the middle of an upper level ridge over Mexico and the Eastern North Pacific Ocean.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Hurricane Priscilla will intensify during the next 24 hours.  Priscilla could strengthen to a major hurricane on Tuesday.

Hurricane Priscilla will move around the western end of a high pressure system over Mexico.  The high pressure system will steer Priscilla slowly toward the northwest during the next 24 hours.  On its anticipated track, Hurricane Priscilla will move closer to the southern part of Baja California on Tuesday.

Elsewhere over the Eastern North Pacific Ocean, former Hurricane Octave weakened back to a tropical storm on Monday.  At 11:00 p.m. EDT on Monday the center of Tropical Storm Octave was located at latitude 15.8°N and longitude 120.4°W which put the center about 840 miles (1355 km) southwest of the southern tip of Baja California.  Octave was moving toward the east-southeast at 7 m.p.h. (11 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 998 mb.

Halong Strengthens to a Typhoon

Former Tropical Storm Halong strengthened to a typhoon west of the Ogasawara Islands south of Japan on Sunday night.  At 5:00 a.m. EDT on Monday the center of Typhoon Halong was located at latitude 25.9°N and longitude 140.5°E which put the center about 665 miles (1075 km) south of Tokyo, Japan.  Halong was moving toward the west at 7 m.p.h. (11 km/h).  The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h).  The minimum surface pressure was 977 mb.

Former Tropical Storm Halong strengthened to a typhoon on Sunday night.  A small circular eye formed at the center of Halong’s circulation.  The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Thunderstorms were also occurring in bands in the eastern side of Typhoon Halong.  Bands in the western side of Halong’s circulation consisted primarily of showers and lower clouds.  Storms near the center of Halong generated upper level divergence that pumped mass away from the typhoon.  The removal of mass caused the surface pressure to decrease.

The distribution of wind speeds in Typhoon Halong was relatively symmetrical.  Winds to typhoon force extended out 25 miles (40 km) from the center of Halong’s circulation.  Winds to tropical storm force extended out 115 miles (185 km) from the center of Typhoon Halong.

Typhoon Halong will move through an environment that is mostly favorable for intensification during the next 24 hours.  Halong will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is south of Japan.  The upper level winds are weak near the middle of the upper level ridge and there will be little vertical wind shear.  However, Halong will move into a region of drier air.  The drier air will inhibit the formation of thunderstorms in the western part of Halong’s circulation.  Typhoon Halong is likely to intensify during the next 24 hours if the drier air does not get pulled into the core of Halong.

Typhoon Halong will move around the southwestern part of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Halong toward the northwest during the next 24 hours.  On its anticipated track, Typhoon Halong will move a little closer to Japan.

Elsewhere, the center of Tropical Storm Matmo moved over northeastern Vietnam.  At 5:00 a.m. EDT on Monday the center of Tropical Storm Matmo was located at latitude 22.4°N and longitude 106.2°E which put the center about 25 miles (40 km) east of Na Phac, Vietnam.  Matmo was moving toward the west-northwest at 13 m.p.h. (21 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 1000 mb.

Priscilla and Octave Intensify to Hurricanes

Former Tropical Storms Priscilla and Octave both intensified to hurricanes over the Eastern North Pacific Ocean on Sunday.  At 8:00 p.m. EDT on Sunday the center of Hurricane Priscilla was located at latitude 16.5°N and longitude 107.1°W which put the center about 285 miles (460 km) south-southwest of Cabo Corrientes, Mexico.  Priscilla was moving toward the north-northwest at 3 m.p.h. (5 km/h).  The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h).  The minimum surface pressure was 986 mb.

A Tropical Storm Watch was issued for the portion of the coast from Punta San Telmo to Punta Mita, Mexico.

Former Tropical Storm Priscilla intensified to a hurricane southwest of Mexico on Sunday.  The inner end of a rainband wrapped around the southern side of the center of Priscilla’s circulation.  An eye appeared to be forming at the center of Hurricane Priscilla.  Other bands of showers and thunderstorms were revolving around the center of Priscilla’s circulation.  Storms near the center of Priscilla generated upper level divergence that pumped mass away from the hurricane.  The removal of mass caused the surface pressure to decrease.

The strongest winds were occurring in the southeastern part of Hurricane Priscilla.  Hurricane force winds extended out 40 miles in the southeastern quadrant of Priscilla’s circulation.  Winds to tropical storm force extended out 175 miles (280 km) from the center of Hurricane Priscilla.

Hurricane Priscilla will move through an environment favorable for intensification during the next 24 hours.  Priscilla will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the middle of an upper level ridge over Mexico and the Eastern North Pacific Ocean.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Hurricane Priscilla will intensify during the next 24 hours.  Priscilla could strengthen to a major hurricane by Tuesday.

Hurricane Priscilla will move around the western end of a high pressure system over Mexico.  The high pressure system will steer Priscilla slowly toward the north-northwest during the next 24 hours.  On its anticipated track, Hurricane Priscilla will move south of Baja California on Tuesday.

Elsewhere over the Eastern North Pacific Ocean, former Tropical Storm Octave also intensified to a hurricane on Sunday.  At 5:00 p.m. EDT on Sunday the center of Hurricane Octave was located at latitude 16.0°N and longitude 123.3°W which put the center about 995 miles (1600 km) south-southwest of the southern tip of Baja California.  Octave was moving toward the northeast at 6 m.p.h. (10 km/h).  The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).  The minimum surface pressure was 987 mb.

Typhoon Matmo Brings Wind and Rain to Southern China

Typhoon Matmo brought wind and rain to southern China on Sunday morning.  At 5:00 a.m. EDT on Sunday the center of Typhoon Matmo was located at latitude 21.1°N and longitude 110.0°E which put the center about 25 miles (40 km) west of Zhanjiang, China.  Matmo was moving toward the west-northwest at 14 m.p.h. (25 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 966 mb.

Typhoon Matmo strengthened to the equivalent of a Category 2 hurricane on the Saffir-Simpson Scale before it made landfall on the coast of southern China on Sunday morning.  The center of Matmo made landfall near Zhanjiang.

Typhoon Matmo was a large typhoon at the time of landfall.  Winds to typhoon force extended out 70 miles (110 km) from the center of Matmo’s circulation.  Winds to tropical storm force extended out 175 miles (280 km) from the center of Typhoon Matmo.

The Hurricane Intensity Index (HII) for Typhoon Matmo was 17.8.  The Hurricane Size Index (HSI) was 23.2 and the Hurricane Wind Intensity Size index (HWISI) was 41.0.  Typhoon Matmo was similar in size and intensity to Hurricane Gustav when Gustav hit Louisiana in 2008.

Typhoon Matmo will move around the southern side of a high pressure system that is over southern China.  The high pressure system will steer Matmo toward the west-northwest during the next 24 hours.  On its anticipated track, Typhoon Matmo will move inland near the coast of southern China.

Typhoon Matmo will bring strong winds and heavy rain to southwestern Guangdong, Guangxi, and Hainan.  Heavy rain is likely to cause floods in some locations.  Matmo could also cause a storm surge of up to 10 feet (3 meters) along parts of the coast.  Typhoon Matmo will drop heavy rain on parts of northern Vietnam early next week.

Elsewhere over the Western North Pacific Ocean, former Tropical Depression 28W strengthened to Tropical Storm Halong east of Iwo To.  At 5:00 a.m. EDT on Sunday the center of Tropical Storm Halong was located at latitude 25.0°N and longitude 142.0°E which put the center about 65 miles (105 km) east of Iwo To.   Halong was moving toward the west-northwest at 5 m.p.h. (8 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 994 mb.

Tropical Storm Priscilla Forms Southwest of Mexico

Tropical Storm Priscilla formed over the Eastern North Pacific Ocean southwest of Mexico on Saturday afternoon.  At 5:00 p.m. EDT on Saturday the center of Tropical Storm Priscilla was located at latitude 15.5°N and longitude 106.6°W which put the center about 285 miles (460 km) south-southwest of Manzanillo, Mexico.  Priscilla was moving toward the northwest at 7 m.p.h. (11 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 1002 mb.

A Tropical Storm Watch was issued for the portion of the coast from Punta San Telmo to Punta Mita, Mexico.

A low pressure system over the Eastern North Pacific Ocean southwest of Mexico strengthened on Saturday afternoon and the U.S. National Hurricane Center designated the system as Tropical Storm Priscilla.

The circulation around Tropical Storm Priscilla was large.  More thunderstorms formed near the center of Priscilla’s circulation on Saturday afternoon.  Bands of showers and thunderstorms were revolving around the center of Tropical Storm Priscilla.  Storms near the center of Priscilla began to generate upper level divergence that pumped mass away from the tropical storm.

The strongest winds were occurring in the northern side of Tropical Storm Priscilla.  Winds to tropical storm force extended out 140 miles (225 km) in the northern part of Priscilla’s circulation.  The winds in the southern side of Tropical Storm Priscilla were blowing at less than tropical storm force.

Tropical Storm Priscilla will move through an environment favorable for intensification during the next 24 hours.  Priscilla will move over water where the Sea Surface Temperatures are near 28°C.   It will move under the middle of an upper level ridge over Mexico and the Eastern North Pacific Ocean.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Tropical Storm Priscilla will intensify during the next 24 hours.  Priscilla could strengthen to a hurricane by Monday.

Tropical Storm Priscilla will move around the western end of a high pressure system over Mexico.  The high pressure system will steer Priscilla slowly toward the north-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Priscilla will move a little closer toward the west coast of Mexico.

Elsewhere over the Eastern North Pacific Ocean, Tropical Storm Octave continued to meander far to the south-southwest of Baja California.  At 5:00 p.m. EDT on Saturday the center of Tropical Storm Octave was located at latitude 14.9°N and longitude 123.9°W which put the center about 1065 miles (1720 km) south-southwest of the southern tip of Baja California.  Octave was moving toward the north-northwest at 6 m.p.h. (10 km/h).  The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 80 m.p.h. (130 km/h).  The minimum surface pressure was 997 mb.

Tropical Cyclone Shakhti Intensifies to Equivalent of Hurricane/Typhoon

Tropical Cyclone Shakhti intensified to the equivalent of a hurricane/typhoon over the Arabian Sea south of Pakistan on Saturday.  At 11:00 a.m. EDT on Saturday the center of Tropical Cyclone Shakhti was located at latitude 21.2°N and longitude 63.1°E which put the center about 330 miles (535 km) southwest of Karachi, Pakistan.  Shakhti was moving toward the west-southwest at 9 m.p.h. (15 km/h).  The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h).  The minimum surface pressure was 982 mb.

Tropical Cyclone Shankhti intensified to the equivalent of a hurricane/typhoon over the Arabian Sea south of Pakistan on Saturday.  The inner end of a rainband wrapped around the center of Shakhti’s circulation.  A small eye was visible at the center of Tropical Cyclone Shakhti.  The eye was surrounded by a thin ring of thunderstorms and the strongest winds were in that ring of storms.  Bands of showers and thunderstorms were revolving around the center of Shakhti’s circulation.  Storms near the center of Shakhti generated upper level divergence that pumped mass away from the tropical cyclone.  The removal of mass caused the surface pressure to decrease.

The strongest winds were occurring in the southern part of Tropical Cyclone Shakhti.  Winds to hurricane/typhoon force extended out 30 miles (50 km) on the southern side of Shakhti’s circulation.  Winds to tropical storm force extended out 90 miles (145 km) from the center of Tropical Cyclone Shakhti.

Tropical Cyclone Shakhti will move through an environment somewhat favorable for intensification during the next 24 hours.  Shakhti will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the southern part of an upper level ridge that is over Pakistan and the northern Arabian Sea.  The upper level ridge will produce easterly winds that will blow toward the top of Shakhti’s circulation.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  However, drier air over southern Asia could get pulled into the northern side of Tropical Cyclone Shakhti.  The drier air will also inhibit intensification.  Tropical Cyclone Shakhti could intensify during the next 24 hours if the drier air stays around the northern periphery of its circulation.

Tropical Cyclone Shakhti will move around the southern side of a high pressure system over Pakistan.  The high pressure system will steer Shakhti toward the west-southwest during the next 24 hours.  On its anticipated track, Tropical Cyclone Shakhti will stay south of Pakistan during the weekend.

 

Typhoon Matmo Passes South of Hong Kong

Typhoon Matmo passed south of Hong Kong on Saturday.  At 11:00 a.m. EDT on Saturday the center of Typhoon Matmo was located at latitude 19.3°N and longitude 113.4°E which put the center about 225 miles (370 km) south of Hong Kong, Philippines.  Matmo was moving toward the west-northwest at 16 m.p.h. (26 km/h).  The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).  The minimum surface pressure was 984 mb.

Typhoon Matmo strengthened as it passed south of Hong Kong on Saturday.  The inner end of a rainband wrapped around the center of Matmo’s circulation.  A circular eye formed at the center of Typhoon Matmo.  The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the core of Matmo’s circulation.  Storms near the core of Matmo generated upper level divergence that pumped mass away from the typhoon.  The removal of mass caused the surface pressure to decrease.

The size of the circulation around Typhoon Matmo increased on Saturday.  Winds to typhoon force extended out 35 miles (55 km) from the center of Matmo’s circulation.  Winds to tropical storm force extended out 175 miles (280 km) from the center of Typhoon Matmo.

Typhoon Matmo will move through an environment favorable for intensification during the next 12 hours.  Matmo 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 China.  The upper level ridge will produce easterly winds that will blow toward the top of Matmo’s circulation.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  Typhoon Matmo will intensify during the next 12 hours. .

Typhoon Matmo will move around the southern side of a high pressure system that is over southern China.  The high pressure system will steer Matmo toward the west-northwest during the next 24 hours.  On its anticipated track, Typhoon Matmo will approach the  southern coast of China in 12 hours.

Typhoon Matmo will bring strong winds and heavy rain to southwestern Guangdong, Guangxi, and Hainan.  Heavy rain is likely to cause floods in some locations.  Matmo also cause a storm surge of up to 10 feet (3 meters) along portions of the coast.

Elsewhere over the Western North Pacific Ocean, Tropical Depression 28W formed east of Iwo To.  At 11:00 a.m. EDT on Saturday the center of Tropical Depression 28W was located at latitude 21.2°N and longitude 63.1°E which put the center about 125 miles (200 km) east of Iwo To.  The tropical depression was moving toward the north at 9 m.p.h. (15 km/h).  The maximum sustained wind speed was 35 m.p.h. (55 km/h) and there were wind gusts to 55 m.p.h. (90 km/h).  The minimum surface pressure was 1003 mb.

Tropical Storm Matmo Moves over South China Sea

Tropical Storm Matmo moved over the South China Sea on Friday morning after crossing northern Luzon.  At 11:00 a.m. EDT on Friday the center of Tropical Storm Matmo was located at latitude 17.7°N and longitude 118.7°E which put the center about 120 miles (195 km) west of Vigan, Philippines.  Matmo was moving toward the west-northwest at 17 m.p.h. (28 km/h).  The maximum sustained wind speed was 70 m.p.h. (110 km/h) and there were wind gusts to 85 m.p.h. (135 km/h).  The minimum surface pressure was 993 mb.

Former Typhoon Matmo weakened back to a tropical storm after it moved across northern Luzon.  A circular eye was still visible at the center of Matmo’s circulation on satellite images.  The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the center of Matmo’s circulation.  Storms near the center of Matmo generated upper level divergence that pumped mass away from the tropical storm.

The circulation around Tropical Storm Matmo was symmetrical.  Winds to tropical storm force extended out 120 miles (195 km) from the center of Matmo’s circulation.

Tropical Storm Matmo will move through an environment favorable for intensification during the next 24 hours.  Matmo 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 China.  The upper level ridge will produce easterly winds that will blow toward the top of Matmo’s circulation.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  Tropical Storm Matmo will intensify during the next 24hours.  Matmo is likely to strengthen back to a typhoon later today.

Tropical Storm Matmo will move around the southern side of a high pressure system that is over southern China.  The high pressure system will steer Matmo toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Matmo will pass south of Hong Kong in 24 hours. Matmo will be near Hainan in 36 hours.