Tag Archives: Tropical Storm Nokaen

Nokaen Strengthens Back to a Tropical Storm

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Former Tropical Depression Nokaen strengthened back to a tropical storm over the Western North Pacific Ocean on Monday night.  At 10:00 a.m. EST on Tuesday the center of the Tropical Storm Nokaen was located at latitude 17.4°N and longitude 132.3°E which put the center about 700 miles (1130 km) northwest of Yap.  Nokaen was moving toward the east at 17 m.p.h. (28 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.

After weakening to a tropical depression on Sunday, Nokaen strengthened back to a tropical storm on Monday night.  Thunderstorms developed in several bands in the eastern side of Tropical Storm Nokaen.  Bands in the western side of Nokaen’s circulation still consisted primarily of showers and lower clouds.  The thunderstorms in the eastern side of Nokaen started to generate some upper level divergence that pumped mass away to the east of the tropical storm.

The strongest winds were occurring in the western side of Tropical Storm Nokaen.  Winds to tropical storm force extended out 115 miles (185 km) in the western half of Nokaen’s circulation.  The winds in the the eastern side of Tropical Storm Nokaen were blowing at less than tropical storm force.

Tropical Storm Nokaen will move through an environment that will be unfavorable for intensification during the next 24 hours.  Nokaen will move over water where the Sea Surface Temperatures are near 28°C.  However, it will continue to be surrounded by drier air.  In addition, Tropical Storm Nokaen will move under the southern portion of the midlatitude upper level westerly winds.  Those winds will cause vertical wind shear.  The drier air and the vertical wind shear will prevent Tropical Storm Nokaen from intensifying.

Tropical Storm Nokaen will move around the northwestern part of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Nokaen toward the east during the next 24 hours.  On its anticipated track, Tropical Storm Nokaen will remain northwest of Yap.

Tropical Storm Nokaen Weakens East of the Philippines

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Tropical Storm Nokaen weakened east of the Philippines on Sunday morning.  At 10:00 a.m. EST on Sunday the center of the Tropical Storm Nokaen was located at latitude 15.5°N and longitude 125.9°E which put the center about 310 miles (500 km) east-southeast of Casiguran, Philippines.  Nokaen was moving toward the north-northeast at 8 m.p.h. (13 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 998 mb.

A combination of drier air and vertical wind shear caused Tropical Storm Nokaen to weaken east of the Philippines on Sunday morning.  A large high pressure system over eastern Asia was transporting drier air into the environment around Tropical Storm Nokaen.  The drier air caused many of the thunderstorms in Nokaen’s circulation to dissipate.  An upper level ridge over the Western North Pacific Ocean was producing southerly winds that blew the tops off of many of the thunderstorms remaining in Tropical Storm Nokaen.

Most of the bands in Tropical Storm Nokaen consisted primarily of showers and lower clouds on Sunday morning.  A few new thunderstorms formed northeast of the center of Nokaen’s circulation.  The dissipation of many of the thunderstorms in Nokaen reduced the upper level divergence.   Without thunderstorms to pump mass away from Nokaen, convergence in the lower levels of the atmosphere caused the surface pressure to increase.

The distribution of wind speeds in Tropical Storm Nokaen remained asymmetrical.  Winds to tropical storm force extended out 115 miles (185 km) in the northern half of Nokaen’s circulation.  Winds to tropical storm force extended out only 25 miles (40 km) in the southern half of Tropical Storm Nokaen.

Tropical Storm Nokaen will move through an environment that will be unfavorable for intensification during the next 24 hours.  Nokaen will move over water where the Sea Surface Temperatures are near 28°C.  However, the western end of the upper level ridge over the Western North Pacific Ocean will continue to produce southerly winds that will blow toward the top of Nokaen’s circulation.  Those winds will cause strong vertical wind shear.  In addition drier air will continue to surround Tropical Storm Nokaen.  Tropical Storm Nokaen is likely to continue to weaken slowly during the next 24 hours.

Tropical Storm Nokaen will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Nokaen toward the northeast during the next 24 hours.  On its anticipated track, the center of Tropical Storm Nokaen will move farther away from Luzon.

Tropical Storm Nokaen Passes East of Luzon

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Tropical Storm Nokaen was passing just to the east of Luzon on Saturday morning.  At 10:00 a.m. EST on Saturday the center of the Tropical Storm Nokaen was located at latitude 15.2°N and longitude 124.1°E which put the center about 185 miles (300 km) east-southeast of Casiguran, Philippines.  Nokaen was moving toward the northwest at 13 m.p.h. (21 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 993 mb.

Tropical Storm Nokaen strengthened a little more as it moved east of Luzon on Saturday morning.  Even though Nokaen was stronger, the distribution of thunderstorms remained asymmetrical.  Thunderstorms were occurring in bands in the western and northern parts of Tropical Storm Nokaen.  Bands in the eastern and southern parts of Nokaen’s circulation consisted primarily of showers and lower clouds.  Storms near the center of Nokaen generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Storm Nokaen was interacting with a high pressure system over eastern Asia.  The interaction was causing a large area of strong winds in the northwestern quadrant of Nokaen’s circulation.  Winds to tropical storm force extended out 150 miles (240 km) in the northwestern quadrant of Tropical Storm Nokaen.  Winds to tropical storm force only extended out 60 miles (95 km) in the other quadrants of Nokaen’s circulation.

Tropical Storm Nokaen will move through an environment that will become unfavorable for intensification during the next 24 hours.  Nokaen will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the western end of an upper level ridge that is over the Western North Pacific Ocean.  The upper level ridge will produce southeasterly winds that will blow toward the top of Nokaen’s circulation.  Those winds will cause the vertical wind shear to increase.  Tropical Storm Nokaen will start to weaken when the vertical wind shear increases.

Tropical Storm Nokaen will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Nokaen toward the north during the next 24 hours.  On its anticipated track, the center of Tropical Storm Nokaen will remain east of Luzon.

Bands in the western side of Tropical Storm Nokaen will bring gusty winds and locally heavy rain to parts of Luzon.  Heavy rain could cause flash floods in some locations.

Tropical Cyclone Nokaen Nears the Philippines

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Tropical Storm Nokaen moved nearer to the Philippines on Friday morning.  At 10:00 a.m. EST on Friday the center of the Tropical Storm Nokaen was located at latitude 12.4°N and longitude 126.7°E which put the center about 115 miles (185 km) east of Laoang, Philippines.  Nokaen was moving toward the west-northwest at 11 m.p.h. (17 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 997 mb.

Tropical Storm Nokaen strengthened on Friday morning as it moved closer to the Philippines.  More thunderstorms formed near the center of Nokaen’s circulation.  More thunderstorms also developed in bands in the western side of Tropical Storm Nokaen.  Bands in the eastern side of Nokaen’s circulation still consisted primarily of showers and lower clouds.  Storms near the center of Nokaen generated more upper level divergence that pumped mass away from the tropical storm.  The removal of more mass caused the surface pressure to decrease.

The strongest winds were occurring in the northwestern part of Tropical Storm Nokaen.  Winds to tropical storm force extended out 150 miles (240 km) in the northwestern quadrant of Nokaen’s circulation.  The winds in the other parts of Tropical Storm Nokaen were blowing at less than tropical storm force.

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

Tropical Storm Nokaen will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Nokaen toward the northwest during the next 24 hours.  On its anticipated track, the center of Tropical Storm Nokaen will be near Samar on in 24 hours.

Bands in the western side of Nokaen’s circulation are already bringing gusty winds and locally heavy rain to Samar, Catanduanes Island, and southeastern Luzon.  Heavy rain is likely to cause flash floods in some locations.

Tropical Storm Nokaen Develops East of the Philippines

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Tropical Storm Nokaen developed over the Western North Pacific Ocean east of the Philippines on Thursday morning.  At 10:00 a.m. EST on Thursday the center of the Tropical Storm Nokaen was located at latitude 10.2°N and longitude 128.8°E which put the center about 220 miles (335 km) east of Dinagat, Philippines.  Nokaen was moving toward the northwest at 2 m.p.h. (3 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 998 mb.

A low pressure system over the Western North Pacific Ocean east of the Philippines strengthened on Thursday morning and the Japan Meteorological Agency designated the system as Tropical Storm Nokaen.

Thunderstorms were occurring near the center of Tropical Storm Nokaen.  Thunderstorms were also occurring in bands in the western and northern parts of Nokaen’s circulation.  Bands in the eastern and southern parts of Tropical Storm Nokaen consisted primarily of showers and thunderstorms.  Storms near the center of Nokaen generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the surface pressure to decrease.

The distribution of winds speeds in Tropical Storm Nokaen was asymmetrical.  Winds to tropical storm force extended out 150 miles (240 km) in the northern half of Nokaen’s circulation.  Winds to tropical storm force extended out 45 miles (75 km) in the southern half of Tropical Storm Nokaen.

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

Tropical Storm Nokaen will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Nokaen toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Nokaen will move closer to the central Philippines.

Bands in the western side of Nokaen’s circulation will bring gusty winds and locally heavy rain to Samar, Cataduanes Island, and southeastern Luzon.  Heavy rain could cause flash floods in some locations.