Tag Archives: St. Maarten

Tropical Depression Fourteen Forms Over Western Caribbean

Tropical Depression Fourteen formed over the western Caribbean Sea on Thursday morning.  At 11:00 a.m. EDT on Thursday the center of Tropical Depression Fourteen was located at latitude 15.1°N and longitude 79.7°W which put it about 235 miles (375 km) east of Cabo Gracias a Dios.  The depression was moving toward the west at 21 m.p.h. (33 km/h).  The maximum sustained wind speed was 35 m.p.h. (55km/h) and there were wind gusts to 45 m.p.h. (75 km/h).  The minimum surface pressure was 1007 mb.

A Tropical Storm Watch was issued for the portion of the coast of Honduras from the border with Nicaragua to Punta Castilla including the Bay Islands.

Satellite images on Thursday morning indicated that a center of circulation had developed within a tropical wave over the western Caribbean Sea and the National Hurricane Center designated the system as Tropical Depression Fourteen.  The circulation around Tropical Depression Fourteen was still organizing.  Bands of showers and thunderstorms were developing and they were beginning to revolve around the center of circulation.  Storms near the center started to generate upper level divergence which was pumping mass away from the depression.

Tropical Depression Fourteen will move through an environment favorable for intensification during the next 36 to 48 hours.  The depression will move over water where the Sea Surface Temperature is near 29°C.  It will move through a region where the upper level winds are weak and the will be little vertical wind shear.  Tropical Depression Fourteen will strengthen during the next day or two.

Tropical Depression Fourteen will move around the southwester part of a subtropical high pressure system over the North Atlantic Ocean.  The high will steer the depression toward the west-northwest during the next 24 hours.  The depression will turn toward the northwest on Friday when it gets closer to the western end of the high.  On its anticipated track Tropical Depression Fourteen will pass near the coast of Honduras on Friday.  It will approach the Yucatan Peninsula on Saturday.  The depression could drop heavy rain over eastern Honduras and flash floods will be possible.

Elsewhere over the Atlantic Ocean,, Tropical Depression Thirteen was speeding toward the northern Leeward Islands.  At 11:00 a.m. EDT on Thursday the center of Tropical Depression Thirteen was located at latitude 16.0°N and longitude 52.0°W which put it about 750 miles (1205 km) east-southeast of the northern Leeward Islands.  The depression was moving toward the west-northwest at 21 m.p.h. (33km/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 1008 mb.

Tropical Storm Watches were in effect for Saba and St. Eustatius, St. Maarten, St. Kitts, Nevis, Antigua, Barbuda and Anguilla.

Potential Tropical Storm Prompts Warnings for Puerto Rico, Virgin Islands, Leeward Islands

A low pressure system that has the potential to organize into a tropical storm prompted the issuance of Tropical Storm Warnings for Puerto Rico, the Virgin Islands and many of the Leeward Islands on Tuesday morning.  At 11:00 a.m. EDT on Tuesday the center of Potential Tropical Cyclone Nine was located at latitude 13.8°N and longitude 53.7°W which put it about 585 miles (940 km) east-southeast of the Leeward Islands.  It was moving toward the west at 23 m.p.h. (37 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 1007 mb.

Tropical Storm Warnings were issued for Puerto Rico, Culebra, Vieques, the U.S. Virgin Islands, Antigua, Barbuda, the British Virgin Islands, Montserrat, St. Kitts, Nevis, Guadeloupe, Martinique, St. Martin, Saba, St. Eustatius, and St. Maarten.

The circulation around Potential Tropical Cyclone Nine was very broad and it stretched from the southwest toward the northeast.  The stronger thunderstorms were occurring in the southwestern and northeastern ends of the circulation.  There were few thunderstorms or bands in the broad middle of the low pressure system.  Winds to tropical storm force extended out 200 miles (320 km) on the northern side of the circulation.  The winds in the southern half of the low pressure system were blowing at less than tropical storm force.

Potential Tropical Cyclone Nine will move through an environment favorable for intensification during the next two days.  It will move over water where the Sea Surface Temperature is near 29°C.  It will move through an area where the upper level winds are weak and there will be little vertical wind shear.  The large broad circulation will contribute to a slow, gradual intensification.  If thunderstorms consolidate around a center of circulation and an inner core begins to form, then the system may be designated as a tropical storm.

Potential Tropical Cyclone Nine will move south of a subtropical high pressure system over the North Atlantic Ocean.  The high will steer the potential tropical storm toward the west-northwest during the next several days.  On its anticipated track Potential Tropical Cyclone Nine could approach the Leeward Islands on Wednesday morning.  It could approach the Virgin Islands and Puerto Rico by Wednesday night.  The large circulation means that Potential Tropical Nine will bring a prolonged period of gusty winds.  It could also drop heavy rain and cause flash floods on some islands.

Imelda’s Remnants Cause Flash Floods in Southeast Texas

The remnants of former Tropical Storm Imelda caused flash floods over parts of southeastern Texas on Thursday.  The National Weather Service extended Flash Flood Emergencies for portions of southwestern San Jacinto County, east central Montgomery County, Chambers County and Liberty County.

At 11:00 a.m. EDT on Thursday the center of Tropical Depression Imelda was located at latitude 30.5°N and longitude 95.5°W which put it about 55 miles (90 km) north of Houston, Texas.  Imelda was moving toward the northwest at 6 m.p.h. (9 km/h).  The maximum sustained wind speed was 25 m.p.h. (40 km/h) and there were wind gusts to 45 m.p.h. (75 km/h).  The minimum surface pressure was 1009 mb.

The remnants of former Tropical Storm Imelda remained nearly stationary over southeastern Texas on Thursday morning.  Bands of showers and thunderstorms in the eastern half of the circulation were dropping heavy rain.  There were unofficial reports that some locations had received up to 30 inches (0.9 meters) of rain.  Flash flood were occurring and a portion of Interstate 10 was closed due to high water.  Southeasterly winds were transport very moist air over the region and the heavy rain was forecast to continue.

Elsewhere over the Atlantic Ocean, former Tropical Storm Jerry strengthened into a hurricane and Hurricane Humberto sped away from Bermuda.  At 11:00 a.m. EDT on Thursday the center of Hurricane Jerry was located at latitude 16.8°N and longitude 54.4°W which put it about 490 miles (785 km) east of the Leeward Islands.  Jerry was moving toward the west-northwest at 16 m.p.h. (26 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 988 mb.  Tropical Storm Watches were in effect for St. Maarten, St. Martin, St. Barthelemy, Barbuda, Anguilla, Saba and St. Eustatius.

At 11:00 a.m. EDT on Thursday the center of Hurricane Humberto was located at latitude 36.8°N and longitude 60.0°W which put it about 415 miles (665 km) northeast of Bermuda.  Humberto was moving toward the northeast at 24 m.p.h. (39 km/h).  The maximum sustained wind speed was 110 m.p.h. (185 km/h) and there were gusts to 130 m.p.h. (210 km/h).  The minimum surface pressure was 955 mb.

Hurricane Humberto Brings Strong Winds to Bermuda

Hurricane Humberto brought strong winds to Bermuda on Wednesday.  At 11:00 p.m. EDT on Wednesday the center of Hurricane Humberto was located at latitude 34.0°N and longitude 63.9°W which put it about 130 miles (215 km) northeast of Bermuda.  Humberto was moving toward the northeast at 23 m.p.h. (37 km/h).  The maximum sustained wind speed was 120 m.p.h. (195 km/h) and there were wind gusts to 140 m.p.h. (225 km/h).  The minimum surface pressure was 952 mb.

The Hurricane Warning for Bermuda was changed to a Tropical Storm Warning because Hurricane Humberto was moving rapidly away from Bermuda.

Although the center of Hurricane Humberto passed just to the northwest of Bermuda, Humberto did produce hurricane force winds on Bermuda.  The weather station at the L.F. Wade International airport measured a sustained wind speed of 82 m.p.h. (132 km/h) and a wind gust to 114 m.p.h. (184 km/h).  There were reports of power electrical outages and wind damage on Bermuda.  Conditions will improve on Thursday when Hurricane Humberto moves rapidly away from Bermuda.

A trough over the eastern U.S. will steer Hurricane Humberto rapidly toward the northeast on Thursday.  Humberto will move into a less favorable environment.  The upper level trough will cause moderate vertical wind shear.  Hurricane Humberto will start to move over cooler water.  Moderate shear and cooler water will cause Hurricane Humberto to weaken during the next several days.  While Humberto moves into a less tropical environment, it will make a transition to a strong extratropical cyclone.

Elsewhere, Tropical Depression Imelda continued to drop heavy rain over parts of eastern Texas and southwestern Louisiana and Tropical Storm Jerry threatened the northern Leeward Islands.  At 11:00 p.m. EDT on Wednesday the center of Tropical Depression Imelda was located at latitude 31.2°N and longitude 94.9°W which put it about 110 miles (175 km) north-northeast of Houston, Texas.  Imelda was moving toward the north at 3 m.p.h. (5 km/h).  The maximum sustained wind speed was 30 m.p.h. (50 km/h) and there were wind gusts to 40 m.p.h. (65 km/h).  The minimum surface pressure was 1008 mb.

At 11:00 p.m. EDT on Wednesday the center of Tropical Storm Jerry was located at latitude 15.4°N and longitude 51.8°W which put it about 675 miles (1085 km) east of the Leeward Islands.  Jerry was moving toward the west-northwest at 15 m.p.h. (24 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 Storm Watches were in effect for St. Maarten, St. Martin, St. Barthelemy, Barbuda, Anguilla, Saba and St. Eustatius.

Tropical Storm Chris Develops South of Cape Hatteras, Beryl Nears Lesser Antilles

Tropical Storm Chris developed south of Cape Hatteras on Sunday morning, while Tropical Storm Beryl neared the Lesser Antilles.  At 11:00 a.m. EDT on Sunday the center of Tropical Storm Chris was located at latitude 32.9°N and longitude 75.0°W which put it about 160 miles (260 km) south of Cape Hatteras, North Carolina.  Chris was nearly stationary.  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.

Thunderstorms developed closer to the center of circulation on Sunday morning and the National Hurricane Center designated former Tropical Depression Three as Tropical Storm Chris.  The circulation of Chris was organizing quickly.  A band of showers and thunderstorms was wrapping around the center of circulation.  Several other rainbands were revolving around the core of the tropical storm.  The bands northwest of the center were weaker because there was drier air in that part of Chris.  The storms near the center of circulation were beginning to generate upper level divergence.

Tropical Storm Chris will remain in an environment favorable for intensification for the next two or three days.  The water in the upper portion of the Atlantic Ocean east of the Carolinas is warmer than normal.  Tropical Storm Chris will be over water where the Sea Surface Temperature is near 28°C.  Chris will be southeast of an upper level trough over the northeastern quarter of the U.S. and it will be under a small upper level ridge.  The upper level winds will be weak and there will be little vertical wind shear.  Tropical Storm Chris will continue to intensify and it could strengthen to a hurricane in the next day or two.

Since Tropical Storm Chris is under the small upper level ridge, the steering winds are weak.  Chris may not move much during the next 24 to 48 hours.  Tropical Storm Chris is forecast to linger of the coast of the Carolinas for several days.  Eventually an upper level trough will approach from the west and start to push Chris toward the northeast.

Elsewhere, Tropical Storm Beryl was nearing the Lesser Antilles on Sunday morning.  At 11:00 a.m. EDT on Sunday the center of Tropical Storm Beryl was located at latitude 14.4°N and longitude 57.9°W which put it about 210 miles (335 km) east of Martinique.  Beryl was moving toward the west-northwest at 23 m.p.h. (37 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 1007 mb.

Tropical Storm Warnings were in effect for Dominica and Guadeloupe.  Tropical Storm Watches were in effect for Saba, St. Eustatius, St. Maarten, St. Martin, Martinique, St. Lucia, and St. Barthelemy.

Thunderstorms continued to develop near the center of Tropical Storm Beryl on Sunday morning and the weakening trend halted at least temporarily.  Beryl remained a small tropical storm.  Winds to tropical storm force only extended out about 45 miles (75 km) from the center of circulation.  There were several bands of showers and thunderstorms in the eastern half of Tropical Storm Beryl.  The bands in the western half of the circulation consisted primarily of showers and low clouds.

Tropical Storm Beryl is forecast to into a region where the easterly winds in the lower levels are stronger.  That would increase the vertical wind shear and make it difficult for the circulation to stay vertically coherent.  Beryl will move over water where the Sea Surface Temperature is near 27°C.  So, there will be enough energy in the upper ocean to support a tropical storm if the wind shear is not too strong.  Tropical Storm Beryl is forecast to weaken when it moves over the eastern Caribbean Sea, but that will depend on how strong the vertical shear gets.

Tropical Storm Beryl is moving south of the subtropical high over the Atlantic Ocean which is steering Beryl toward the west-northwest.  A general motion toward the west-northwest is forecast to continue for several more days.  On its anticipated track Tropical Storm Beryl will bring gusty winds and locally heavy rain to St. Lucia, Martinique, Dominica and Guadeloupe during the next few hours,

Tropical Storm Beryl Weakens East of the Lesser Antilles

Tropical Storm Beryl weakened on Saturday as it move closer to the Lesser Antilles.  At 11:00 p.m. EDT on Saturday the center of circulation was located at latitude 13.1°N and longitude 54.3°W which put it about 495 miles (795 km) east-southeast of the Lesser Antilles.  Beryl was moving toward the west-northwest at 18 m.p.h. (30 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 1005 mb.

Tropical Storm Warnings were in effect for Dominica and Guadeloupe.  Tropical Storm Watches were in effect for Saba, St. Eustatius, St. Maarten, Martinique, St. Martin, St. Barthelemy, Barbados and St. Lucia.

Tropical Storm Beryl moved into a region where the easterly winds in the lower level were stronger and the increased vertical wind shear started to blow the lower part of the circulation to the west of the upper part of Beryl.  It also seemed to move into an area of drier air, which caused most of the stronger thunderstorms to weaken.  There was still a well organized circulation in the lower levels, but it weakened on Saturday.  More thunderstorms developed near the center of circulation and on the eastern side of Tropical Storm Beryl in recent hours.  If those storms persist then Beryl could strengthen again, but if they dissipate quickly, then the tropical storm could weaken again on Sunday.

Tropical Storm Beryl will move through an environment that contains factors that are favorable for intensification and other factors that are unfavorable.  Beryl will move over water where the Sea Surface Temperature is near 27°C.  It will move through an area where the lower level winds are stronger and so there will be more vertical wind shear.  There will be areas of moister air within a larger area of drier air.  If the recently developed thunderstorms persist on Sunday, then the Beryl could strengthen again.  However, if the storms dissipate in a few hours, then Tropical Storm Beryl could weaken further.  The small size of the circulation means that rapid changes in intensity can occur.

Tropical Storm Beryl was moving south of the subtropical high over the Atlantic Ocean.  The high was steering Beryl toward the west-northwest and that general motion is forecast to continue for the next several days.  On its anticipated track Tropical Storm Beryl could reach the Lesser Antilles on Sunday night.  There is a lot of uncertainty about how strong Beryl may be when it reaches those islands.

Elsewhere over the Atlantic Ocean Tropical Depression Three spun south of Cape Hatteras.  At 11:00 p.m. EDT on Saturday the center of Tropical Depression Three was located at latitude 32.9°N and longitude 75.1°W which put it about 160 miles (260 km) south of Cape Hatteras, North Carolina.  It was nearly stationary.  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 1014 mb.