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Hurricane Delta Brings Wind and Rain to Louisiana

Hurricane Delta brought wind and rain to Louisiana on Friday evening.  At 8:00 p.m. EDT on Friday the center of Hurricane Delta was located at latitude 30,0°N and longitude 93.0°W which put it about 25 miles west-southwest of Jennings, Louisiana.  Delta was moving toward the north-northwest at 14 m.p.h. (22 km/h).  The maximum sustained wind speed was 90 m.p.h. (145 km/h) and there were wind gusts to 105 m.p.h. (165 km/h).  The minimum surface pressure was 971 mb.

A Hurricane Warning was in effect for the portion of the coast from High Island, Texas to Morgan City, Louisiana.  Tropical Storm Warnings were in effect for the portions of the coast from San Luis Pass to High Island, Texas and from Morgan City, Louisiana to the Mouth of the Pearl River.  The Tropical Storm Warning includes New Orleans, Lake Pontchartrain and Lake Maurepas.

According the National Hurricane Center the center of Hurricane Delta officially made landfall on the coast of Louisiana near Creole.  The maximum sustained wind speed at the time of landfall was 100 m.p.h. (160 km/h).  Winds to hurricane force extended out 40 miles (65 km) from the center of circulation.  Winds to tropical storm force extended out 160 miles (260 km).

Hurricane Delta weakened on Friday while moved toward the coast of Louisiana.  An upper level trough produced southwesterly winds which blew toward the top of Delta.  Those winds caused moderate vertical wind shear.  The circulation around Hurricane Delta pulled drier air about the southern side of the hurricane.  In addition, Delta moved over cooler water near the coast of Louisiana.  The combination of shear, drier air and cooler water caused the circulation to weaken on Friday afternoon.

Even though it weakened, Hurricane Delta brought strong winds and rain to Louisiana.  A weather station in Lake Charles, Louisiana reported a sustained wind speed of 64 m.p.h. (103 km/h) and a wind gust of 95 m.p.h. (153 km/h).  A weather station at Lake Arthur, Louisiana reported a sustained wind speed of 77 m.p.h. (125 km/h) and a wind gust of 96 m.p.h. (154 km/h).  A weather station at Cameron, Louisiana reported a sustained wind speed of 58 m.p.h. (93 km/h) and a wind gust of 78 m.p.h. (128 km/h).  A weather station at Port Arthur, Texas reported a wind gust of 71 m.p.h. (114 km/h).

Winds blowing around the eastern side of Hurricane Delta pushed water toward the coast and cause a storm surge.  A station at Freshwater Canal Locks in Louisiana reported a water level rise of 8 feet (2.4 meters).  Delta also dropped heavy rain over parts of Louisiana.  Flash Flood Warnings were issued for some of the areas around Lake Charles and Lafayette, Louisiana.

Hurricane Delta will weaken steadily as it moves farther inland.  The upper level trough will steer Delta toward the northeast during the next several days.  On its anticipated track Delta will move across Louisiana toward southwest Tennessee.  The center of Delta will pass near Alexandria and Monroe, Louisiana.  Flash Flood Watches were in effect for Louisiana, northern Mississippi. southeastern Arkansas, and southwestern Tennessee.

Laura Weakens to Tropical Storm over Arkansas

Former Hurricane Laura weakened to a tropical storm over Arkansas on Thursday afternoon.  At 2:00 p.m. EDT on Thursday the center of Tropical Storm Laura was located at latitude 32.9°N and longitude 92.8°W which put it about 25 miles (40 km) west-southwest of El Dorado, Arkansas.  Laura was moving toward the north-northeast 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 988 mb.

All coastal Tropical Storm Warnings have been discontinued.

Hurricane Laura caused significant wind damage over southwestern Louisiana.  The largest concentration of damage appeared to be around Lake Charles, Louisiana.  There were reports that the dome for the weather radar at the National Weather Service office in Lake Charles sustained heavy damage.  The Automated Surface Observing Station (ASOS) at Lake Charles reported a peak wind speed of 133 m.p.h. (215 km/h).  There were also reports of widespread power outages in Louisiana and eastern Texas.

Former Hurricane Laura gradually weakened as it moved inland over Louisiana.  The circulation around Tropical Storm Laura was still well organized.  However, drier air was wrapping around the western and southern sides of the circulation.  The heavier rains and stronger winds were north and east of the center of Laura.  Flash Flood Watches were in effect for parts of Arkansas, western Tennessee, western Kentucky and extreme southeastern Missouri.

Tropical Storm Laura will turn more toward the east when it reaches southern Missouri on Friday.  Westerly winds in the middle latitudes will carry Laura toward the east coast of the U.S.  Tropical Storm Laura could bring gusty winds and locally heavy rain to West Virginia on Saturday.

Powerful Hurricane Laura Makes Landfall in Southwest Louisiana

Powerful Hurricane Laura made landfall in southwest Louisiana on Wednesday night.  At 2:00 a.m. EDT on Thursday the center of Hurricane Laura was located at latitude 29.8°N and longitude 93.3°W which put it about 30 miles (50 km) south-southwest of Lake Charles, Louisiana.  Laura was moving toward the north at 15 m.p.h. (24 km/h).  The maximum sustained wind speed was 150 m.p.h. (240 km/h) and there were wind gusts to 175 m.p.h. (280 km/h).  The minimum surface pressure was 938 mb.

A Hurricane Warning was in effect for the portion of the coast from High Island, Texas to Intracoastal City, Louisiana.  Tropical Storm Warnings were in effect for the portions of the coast from San Luis Pass to High Island, Texas and from Intracoastal City to the Mouth of the Mississippi River.

The center of Hurricane Laura officially made landfall near Cameron, Louisiana on Tuesday night.  Hurricane Laura was the strongest hurricane on record to make landfall on the coast of southwest Louisiana.  Laura was stronger than Hurricane Rita was when Rita made landfall in the same area in September 2005.  The Hurricane Intensity Index (HII) for Hurricane Laura was 31.6.  The Hurricane Size Index (HSI) was 19.6 and the Hurricane Wind Intensity Size Index (HWISI) was 51.2.  Hurricane Laura was capable of causing widespread extensive damage.

A NOAA National Ocean Service weather station at Calcasieu Pass measured a sustained wind speed of 93 m.p.h. (150 km/h) and a wind gust of 127 m.p.h. (204 km/h) during the passage of the northern eyewall.  The station also recorded a water rise of over 10 feet (3 meters).  The National Weather Service station at the Lake Charles airport measured a wind gust of 104 m.p.h. (167 km/h) during the passage of an inner rainband.  There were numerous reports of power outages.

Hurricane Laura will move inland over western Louisiana on Thursday.  The center of Laura will move over southern Arkansas by Thursday night.  Hurricane Laura will continue to cause a significant storm surge along the coast of Louisiana on Thursday morning.  Laura could produce hurricane force winds in Alexandria, Louisiana.  It could bring strong tropical storm force winds to Shreveport and Monroe.  Hurricane Laura will also drop heavy rain over Louisiana and parts of Arkansas.  Flash floods could occur in some locations.

Hurricane Laura Intensifies to Cat. 4

Hurricane Laura rapidly intensified to Category 4 on the Saffir-Simpson Scale on Wednesday.  At 2:00 p.m. EDT on Wednesday the center of Hurricane Laura was located at latitude 27.3°N and longitude 92.5°W which put it about 200 miles (320 km) south-southeast of Lake Charles, Louisiana.  Laura was moving toward the northwest at 16 m.p.h. (26 km/h).  The maximum sustained wind speed was 140 m.p.h. (225 km/h) and there were wind gusts to 170 m.p.h. (275 km/h).  The minimum surface pressure was 952 mb.

A Hurricane Warning was in effect for the portion of the coast from San Luis, Pass, Texas to Intracoastal City, Lousiana.  Tropical Storm Warnings were in effect for the portions of the coast from Sargent, Texas to San Luis Pass and from Intracoastal City to the Mouth of the Mississippi River.

Hurricane Laura continued to intensify rapidly on Wednesday morning.  The eye became more circular and well defined.  The ring of thunderstorms around the eye strengthened and the highest wind speeds were occurring in that ring of storms.   Storms near the core of Laura generated strong upper level divergence which pumped large quantities of mass away from the hurricane.  The continued removal of mass allowed a further rapid decrease in surface pressure.

Hurricane Laura grew into a large hurricane on Wednesday.  Winds to hurricane force extended out 70 miles (110 km) from the center of circulation.  Winds to tropical storm force extended out 175 miles (280 km) from the center of Laura.  The Hurricane Intensity Index (HII) for Hurricane Laura was 28.3.  The Hurricane Size Index (HSI) was 19.1 and the Hurricane Wind Intensity Size Index (HWISI) was 47.4.  Hurricane Laura was capable of causing widespread significant damage.

Hurricane Laura could strengthen during the next few hours.  Laura will move over water where the Sea Surface Temperature is near 30°C.  There is a possibility that Hurricane Laura could intensify to Category 5 on the Saffir-Simpson Scale.  When Hurricane Laura nears the coast of western Louisiana, it will be closer to an upper level trough over Texas and Oklahoma.  The trough will produce southwesterly winds which will blow toward the top of Laura.  Those winds will cause the vertical wind shear to increase and that could stop the intensification of Hurricane Laura.

Hurricane Laura will move around the western end of a subtropical high pressure system that extends from the Atlantic Ocean over the Gulf of Mexico.  Laura will start to move towards the north when it reaches the western end of the high.  On its anticipated track Hurricane Laura will make landfall south of Lake Charles, Louisiana in 8 to 10 hours.  After it makes landfall, Laura will move north over western Louisiana.

Hurricane Laura is a strong, extremely dangerous hurricane.  It is capable of causing widespread significant damage.  Laura will be stronger than Hurricane Rita was when Rita hit the same area in 2005.  Hurricane Laura will cause a storm surge of 15 to 20 feet (5 to 7 meters) near and to the east of where the center makes landfall.  Large sections of the southwest coast of Louisiana south of Interstate 10 will go underwater.  Hurricane Laura will bring hurricane force winds to much of western Louisiana and to extreme east Texas.  Widespread power outages are likely.  Hurricane Laura will drop heavy rain over parts of western Louisiana, eastern Texas and Arkansas.  Flash floods could result from the heavy rain

Tropical Depression Cristobal Brings Rain to Lower Mississippi River Valley

Tropical Depression Cristobal brought rain to the lower Mississippi River Valley on Monday.  At 11:00 p.m. EDT on Monday the center of Tropical Depression Cristobal was located at latitude 34.8°N and longitude 92.8°W which put it about 10 miles (15 km) west of Little Rock, Arkansas.  Cristobal was moving toward the north-northwest at 17 m.p.h. (28 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 994 mb.

Tropical Depression Cristobal moved northward across Louisiana and Arkansas on Monday.  Steadier rain fell in the northern part of the circulation around Cristobal.  Diverging air from a surface high pressure system east of the Great Lakes converged with the circulation around the northern side of Tropical Depression Cristobal to produce rising motion.  The rising motion produced the steadier rain.  Thunderstorms in bands in the southern and eastern parts of Cristobal dropped locally heavy rain over parts of Louisiana, Mississippi and Alabama.  Jackson, Mississippi received 2.49 inches (6.3 cm) of rain.  Little Rock, Arkansas received 1.49 inches (3.8 cm) of rain.

Tropical Depression Cristobal will move around the western side of a high pressure system.  The high will steer Cristobal toward the north during the next several days.  The circulation around Tropical Depression Cristobal retained tropical characteristics on Monday night.  Radiosonde data from Little Rock and Jackson, Mississippi showed that there was still a warm core in the middle troposphere.  Cristobal is forecast to make a gradual transition to an extratropical cyclone during the next 24 to 36 hours.  The circulation could strengthen during the extratropical transition and a Gale Warning has been issued for Lake Michigan.  Flood Watches were also in effect for locations from Mississippi to Wisconsin.

Tropical Storm Cristobal Causes Storm Surge on Gulf Coast

Tropical Storm Cristobal caused a storm surge on the Gulf Coast on Sunday.  At 11:00 p.m. EDT on Sunday the center of Tropical Storm Cristobal was located at latitude 30.3°N and longitude 90.2°W which put it about 20 miles (30 km) north-northwest of New Orleans, Louisiana.  Cristobal was moving toward the north-northwest at 10 m.p.h. (16 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 993 mb.

A Tropical Storm Warning remained in effect for the portion of the coast from Morgan City, Louisiana to the Okaloosa/Walton County Line in Florida.

The large circulation around Tropical Storm Cristobal blew water toward the northern coast of the Gulf of Mexico on Sunday.  The wind produced a rise in the water level from northwest Florida to southeast Louisiana.  The highest storm surges occurred along the coast of Mississippi and southeast Louisiana.  The water level reached 7.47 feet (2.28 m) at the Waveland Yacht Club in Mississippi.  The storm surge was 7.62 feet (2.32 m) at Shell Beach in Louisiana.  The storm surge covered coastal roads in Grand Isle, Louisiana and Biloxi, Mississippi.

The broad center of Tropical Storm Cristobal passed across the Lower Mississippi River delta on Sunday afternoon before it moved over New Orleans.  Cristobal began to weaken slowly as it moved inland.  Winds to tropical storm force were still occurring in the southeastern part of the circulation which was still over the Gulf of Mexico.  Most of the rain was falling in bands on the northern side of Tropical Storm Cristobal.  Locally heavy rain fell over Northwest Florida, Southwest Alabama, Southern Mississippi and Southeastern Louisiana.

Tropical Storm Cristobal will move around the western end of a subtropical high pressure system over the western Atlantic Ocean.  The high will steer Cristobal toward the north during the next several days.  On its anticipated track Tropical Storm Cristobal will move over Louisiana and Arkansas on Monday.  Cristobal will continue to weaken slowly as it moves farther inland.  Tropical Storm Cristobal will drop locally heavy rain over parts of Mississippi, eastern Louisiana, Arkansas and Missouri.  Flood Watches have been issued for some of those areas.

Tropical Storm Olga Develops over Gulf of Mexico, Pablo near the Azores

Tropical Storm Olga developed over the Gulf of Mexico and Tropical Storm Pablo formed near the Azores on Friday afternoon.  At 5:00 p.m. EDT on Friday the center of Tropical Storm Olga was located at latitude 26.3°N and longitude 93.2°W which put it about 260 miles (420 km) south of Lake Charles, Louisiana.  Olga was moving toward the north-northeast at 18 m.p.h. (30 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 reconnaissance plane found that former Tropical Depression Seventeen had strengthened by Friday afternoon and the National Hurricane center designated the system as Tropical Storm Olga.  More thunderstorms developed near the center of Olga and the plane found that the minimum surface pressure had decreased to 998 mb.  Bands of showers and thunderstorms were also developing around the tropical storm.  The strongest rainbands were in the eastern half of the circulation.  Bands in the western half of the circulation consisted of more showers and lower clouds.  Storms near the center were generating upper level divergence which was pumping mass away to the northeast of Tropical Storm Olga.  Winds to tropical storm force extended out about 90 miles (145 km) from the center of circulation in the northeastern quadrant of Olga.

Tropical Storm Olga could strengthen a little more during the next 12 hours.  Olga will move over water where the Sea Surface Temperature is near 28°C.  An upper level trough over the south central U.S. and Mexico will produce southwesterly winds which will blow toward the top of the circulationn. Those winds will produce moderate vertical wind shear, which will inhibit intensification.  However, the shear will not be strong enough to prevent intensification while the Olga is over the Gulf of Mexico.  The wind shear will cause Tropical Storm Olga to start a transition to an extratropical cyclone.  A cold front will move toward Olga from the northwest and the tropical storm could merge with the front during the next 24 hours.

The upper level trough will steer Tropical Storm Olga toward the north during the next several days. On its anticipated track Olga will make landfall on the coast of Louisiana during Friday night.  Tropical Storm Olga will bring  gusty winds to coastal Louisiana. Olga is likely to drop heavy rain over parts of Louisiana, Mississippi, and eastern Arkansas. The rain could cause floods in some locations.

Elsewhere over the Atlantic Ocean, visible satellite images revealed that a tiny tropical storm had developed at the center of a much larger low pressure system west of the Azores on Friday afternoon.  The National Hurricane Center designated the system as Tropical Storm Pablo.  At 5:00 p.m. EDT on Friday the center of Tropical Storm Pablo was located at latitude 35.8°N and longitude 32.2°W which put it about 325 miles (525 km) west-southwest of the Azores.  Pablo was moving toward the east-southeast at 10 m.p.h. (16 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 990 mb.  Winds to tropical storm force extended out 35 miles (55 km) from the center of Tropical Storm Pablo.

Tropical Depression Seventeen Develops over Western Gulf of Mexico

Tropical Depression Seventeen developed over the western Gulf of Mexico on Friday.  At 11:00 a.m. EDT on Friday morning the center of Tropical Depression Seventeen was located at latitude 25.6°N and longitude 94.4°W which put it about 320 miles (515 km) south-southwest of Lake Charles, Louisiana.  It was moving toward the north at 16 m.p.h. (26 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 1006 mb.

More thunderstorms developed near the center of a low pressure system over the western Gulf of Mexico on Friday morning and the National Hurricane Center designated the system as Tropical Depression Seventeen.  Bands of showers and thunderstorms were also developing around the depression.  The strongest rainbands were in the eastern half of the circulation.  Bands in the western half of the circulation consisted of more showers and lower clouds.  Storms near the center were generating upper level divergence which was pumping mass away to the northeast of the depression.

Tropical Depression Seventeen is likely to strengthen during the next 12 to 18 hours.  The depression will move over water where the Sea Surface Temperature is near 28°C.  An upper level trough over the south central U.S. and Mexico will produce southwesterly winds which will blow toward the top of the depression.  Those winds will produce moderate vertical wind shear, which will inhibit intensification.  However, the shear will not be strong enough to prevent intensification while the depression is over the Gulf of Mexico.  The wind shear will cause the depression to start a transition to an extratropical cyclone.  A cold front will move toward the depression from the northwest and the depression could merge with the front during the next 24 hours.

The upper level trough will steer the depression toward the north during the next several days.  On its anticipated track the depression will make landfall on the coast of Louisiana during Friday night.  The depression could be a tropical storm when it makes landfall.  It will bring gusty winds to coastal Louisiana.  The depression is likely to drop heavy rain over parts of Louisiana, Mississippi, and eastern Arkansas.  The rain could cause floods in some locations.

Tropical Storm Barry Drops Heavy Rain Over Lower Mississippi River Valley

Tropical Storm Barry dropped heavy rain over parts of the Lower Mississippi River Valley on Sunday.  The wind speed gradually decreased as Barry moved farther inland on Sunday and it was classified as a tropical depression on Sunday evening.  At 11:00 p.m. EDT on Sunday the center of Tropical Depression Barry was located at latitude 33.5°N and longitude 93.5°W which put it about 70 miles (110 km) north of Shreveport, Louisiana.  Barry was moving toward the north at 12 m.p.h. (19 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.

Several rainbands in the southern and eastern portions of the circulation around former Tropical Storm Barry dropped persistent heavy rainfall on Sunday.  One rainband developed in an arc that ran from near Beaumont/Port Arthur, Texas to near Alexandria, Louisiana.  A weather station in Beaumont/Port Arthur measured 4.21 inches (10.69 cm) of rain.  A second rainband stretched from south of Abbeville, Louisiana to west of Baton Rouge.  A weather station in Abbeville measured 4.29 inches (10.90 cm) of rain and a station in Lafayette recorded 3.68 inches (9.34 cm).  A third rainband dropped heavy rain over parts of Mississippi.  A weather station in Hattiesburg, Mississippi measured 4.06 inches (10.31 cm) of rain.  A fourth rainband dropped heavy rain over parts of western Alabama.

The center of Tropical Depression Barry is forecast to move north-northeast across Arkansas on Monday.  Bands of showers and thunderstorms in the eastern side of the circulation around Barry are likely to drop heavy rain over parts of Mississippi, eastern Arkansas, eastern Louisiana, western Alabama and western Tennessee on Monday.  Flash flooding could occur in some locations.

Tropical Storm Gordon Makes Landfall on the Gulf Coast.

Tropical Storm Gordon made landfall on the Gulf Coast near Pascagoula, Mississippi on Tuesday night.  At 11:30 p.m. EDT on Tuesday the center of Tropical Storm Gordon was located at latitude 30.4°N and longitude 88.4°W which put it about 30 miles (50 km) east of Biloxi, Mississippi.  Gordon was moving toward the northwest at 14 m.p.h. (22 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 997 mb.

A Hurricane Warning was in effect for the portion of the coast from the Mouth of the Pearl River to the Alabama-Florida border.  A Tropical Storm Warning was in effect for the portion of the coast from the Okaloosa-Walton County line to the Alabama-Florida border.

The circulation of Tropical Storm Gordon was asymmetrical.  The strongest bands of showers and thunderstorms were north and east of the center of circulation.  The strongest winds were occurring in those bands.  A C-MAN station on Dauphin Island, Alabama reported a sustained wind speed of 62 m.p.h. (100 km/h) and a wind gust of 72 m.p.h. (117 km/h).  The winds were much weaker south and west of the center of Tropical Storm Gordon and there was little rain in those parts of the tropical storm.

Tropical Storm Gordon will start to weaken as the center moves inland.  Gordon will continue to move around the western end of a high pressure system over the western Atlantic Ocean.  The high will steer Tropical Storm Gordon toward the northwest during the next day or two.  On its anticipated track Tropical Storm Gordon will move across southern Mississippi on Wednesday and over Arkansas on Thursday.  The wind will be strong enough to cause minor damage and it will cause some power outages.  Locally heavy rain and the potential for flash floods are the greater risks.  Flash Flood Warnings were in effect for parts of West Florida and Southwest Alabama.  Flash Flood Watches were in effect for Mississippi and Southeastern Arkansas.

Elsewhere over the tropical Atlantic Ocean, Hurricane Florence was continuing to intensify east of the northern Leeward Islands.  At 11:00 p.m. EDT on Tuesday the center of Hurricane Florence was located at latitude 20.7°N and longitude 43.9°W which put it about 1515 miles (2440 km) east-southeast of Bermuda.  Florence was moving toward the west-northwest at 12 m.p.h. (19 km/h).  The maximum sustained wind speed was 100 m.p.h (160 km/h) and there were wind gusts to 120 m.p.h. (195 km/h).  The minimum surface pressure was 976 mb.