The Timeline of the 1999 Atlantic hurricane season documents all the storm formations, strengthening, weakening, landfalls, extratropical transitions, as well as dissipation. The timeline also includes information which was not operationally released, meaning that information from post-storm reviews by the National Hurricane Center, such as information on a storm that was not operationally warned on, has been included. The 1999 Atlantic hurricane season was slightly above average in terms of activity, with 12 tropical cyclones, 8 hurricanes, and 5 major hurricanes (hurricanes that are classified as Category 3 or higher).
June 1
12:00 am EDT (0400 UTC) - The 1999 Atlantic hurricane season officially began.
June 11
1:00 pm EDT (1800 UTC) - Tropical Depression One formed about 465 miles (758 km) southeast of Bermuda.
June 12
7:00 am EDT (1200 UTC) - Tropical Depression One strengthened into Tropical Storm Arlene.
June 13
1:00 am EDT (0600 UTC) - Tropical Storm Arlene attained its peak intensity with winds 60 mph (95 km/h) and a barometric pressure of 1006 mbar (hPa; 29.71 inHg).
June 16
7:00 pm EDT (0000 UTC June 17) - Tropical Storm Arlene was downgraded back to a tropical depression.
June 17
1:00 am EDT (0600 UTC) - Tropical Depression Arlene passed about 100 miles (161 km) east of Bermuda, which was its closest approach to land.
7:00 pm EDT (0000 UTC June 18) - Tropical Depression Arlene dissipated.
July 2
1:00 pm EDT (1800 UTC) - Tropical Depression Two formed in the Bay of Campeche.
7:00 pm EDT (0000 UTC July 3) - Tropical Depression Two attained its peak intensity with winds of 35 mph (55 km/h) and a minimum pressure of 1004 mbar (hPa; 29.65 inHg).
11:00 pm EDT (0400 UTC July 3) - Tropical Depression Two made landfall near Tecolutla, Mexico with winds of 35 mph (55 km/h).
July 3
7:00 am EDT (1200 UTC) - Tropical Depression Two dissipated over Mexico.
August 18
1:00 pm EDT (1800 UTC) - Tropical Depression Three also formed in the Bay of Campeche.
7:00 pm EDT (0000 UTC August 19) - Tropical Depression Four formed about 155 miles (250 km) east-southeast of the Cape Verde Islands.
August 19
1:00 pm EDT (1800 UTC) - Tropical Depression Three strengthened into Tropical Storm Bret.
August 20
1:00 pm EDT (1800 UTC) - Tropical Depression Four strengthened into Tropical Storm Cindy.
7:00 pm EDT (0000 UTC August 21) - Tropical Storm Bret strengthened into Hurricane Bret.
7:00 pm EDT (0000 UTC August 21) - Tropical Storm Cindy strengthened into Hurricane Cindy.
August 21
1:00 pm EDT (1800 UTC) - Hurricane Bret strengthened into a category 2 hurricane.
7:00 pm EDT (0000 UTC August 22) - Hurricane Bret rapidly strengthened into a category 4 hurricane.
August 22
7:00 am EDT (1200 UTC) - Hurricane Bret attained its peak intensity with winds of 145 mph (230 km/h) and a minimum pressure of 944 mbar (hPa; 27.88 inHg).
1:00 pm EDT (1800 UTC) - Hurricane Cindy was downgraded back to a tropical storm.
7:00 pm EDT (0000 UTC August 22) - Hurricane Bret weakened back to a category 3 hurricane. Simultaneously, Hurricane Bret also made landfall on central Padre Island, Texas with winds of 115 mph (185 km/h).
August 23
1:00 am EDT (0600 UTC) - Hurricane Bret rapidly weakened back to a category 1 hurricane.
7:00 am EDT (1200 UTC) - Hurricane Bret attained its peak intensity with winds of 145 mph (230 km/h) and a minimum pressure of 944 mbar (hPa; 27.88 inHg).
7:00 am EDT (1200 UTC) - Hurricane Bret was downgraded to a tropical storm over Texas.
7:00 pm EDT (0000 UTC August 24) - Tropical Storm Bret weakened to a tropical depression while passing 35 miles (56 km) north of Laredo, Texas.
7:00 pm EDT (0000 UTC August 24) - Tropical Depression Five formed 190 miles east of Turks Island.
August 24
1:00 am EDT (0600 UTC) - Tropical Depression Five strengthened into Tropical Storm Dennis.
1:00 am EDT (0600 UTC) - Tropical Depression Six formed a few hundred miles east of the Windward Islands.
7:00 am EDT (1200 UTC) - Tropical Depression Six strengthened into Tropical Storm Emily.
1:00 pm EDT (1800 UTC) - Tropical Storm Emily attained its peak intensity with winds of 50 mph (85 km/h) and a minimum pressure of 1004 mbar (hPa; 29.65 inHg).
August 25
1:00 am EDT (0600 UTC) - Tropical Depression Bret dissipated over northern Mexico.
7:00 pm EDT (0000 UTC August 26) - Tropical Storm Cindy re-strengthened into a hurricane.
August 26
1:00 am EDT (0600 UTC) - Tropical Storm Dennis strengthened into Hurricane Dennis.
August 27
7:00 am EDT (1200 UTC) - Hurricane Cindy strengthened into a category 2 hurricane.
1:00 pm EDT (0000 UTC August 28) - Hurricane Cindy strengthened into a category 3 hurricane.
August 28
1:00 am EDT (0600 UTC) - Hurricane Cindy strengthened into a category 4 hurricane.
2:00 am EDT (0700 UTC) - Hurricane Dennis made passed through the Abaco Islands, making landfall on some on the islands with winds of 85 mph (140 km/h).
7:00 am EDT (1200 UTC) - Hurricane Cindy attained its peak intensity with winds of 145 mph (230 km/h) and a minimum pressure of 942 mbar (hPa; 27.82 inHg).
7:00 am EDT (1200 UTC) - Tropical Storm Emily was downgraded back to a tropical depression.
7:00 am EDT (1200 UTC) - Hurricane Dennis strengthened into a category 2 hurricane.
1:00 pm EDT (1800 UTC) - Tropical Depression Emily was absorbed by Hurricane Cindy.
August 29
7:00 am EDT (1200 UTC) - Hurricane Cindy weakened back to a category 3 hurricane.
1:00 pm EDT (1800 UTC) - Hurricane Cindy weakened back to a category 2 hurricane.
August 30
1:00 am EDT (0600 UTC) - Hurricane Dennis attained its peak intensity with winds of 105 mph (165 km/h) and a minimum pressure of 962 mbar (hPa; 28.41 inHg).
7:00 am EDT (1200 UTC) - Hurricane Cindy weakened back to a category 1 hurricane.
7:00 pm EDT (0000 UTC August 31) - Hurricane Dennis weakened back to a category 1 hurricane.
August 31
1:00 am EDT (0600 UTC) - Hurricane Cindy was downgraded back to a tropical storm.
1:00 pm EDT (1800 UTC) - Tropical Storm Cindy was absorbed by an extratropical low.
7:00 pm EDT (0000 UTC) - Hurricane Dennis weakened back to a tropical storm.
September 4
4:00 pm EDT (2100 UTC) - Tropical Storm Dennis made landfall on Harkers Island, North Carolina with winds of 70 mph (110 km/h).
September 5
7:00 am EDT (1200 UTC) - Tropical Storm Dennis was downgraded to a tropical depression over central North Carolina.
1:00 pm EDT (1800 UTC) - Tropical Depression Seven formed in the southwestern Gulf of Mexico.
7:00 pm EDT (0000 UTC September 6) - Tropical Depression Seven attained its peak intensity with winds of 35 mph (55 km/h) and a minimum pressure of 1006 mbar (hPa; 29.71 inHg).
September 6
7:00 am EDT (1200 UTC) - Tropical Depression Seven made landfall in the Mexican state of Veracruz with winds of 35 mph (55 km/h).
September 7
7:00 am EDT (1200 UTC) - Tropical Depression Seven dissipated over Mexico.
1:00 pm EDT (1800 UTC) - Tropical Depression Dennis became extratropical over northern New York.
1:00 pm EDT (1800 UTC) - Tropical Depression Eight formed 1,000 miles (1,600 km) east of the Lesser Antilles.
September 8
1:00 am EDT (0600 UTC) - Tropical Depression Eight strengthened into Tropical Storm Floyd.
September 10
7:00 am EDT (1200 UTC) - Tropical Storm Floyd strengthened into Hurricane Floyd.
September 11
1:00 am EDT (0600 UTC) - Hurricane Floyd strengthened into a category 2 hurricane.
7:00 am EDT (1200 UTC) - Tropical Depression Nine formed near Cape Verde.
September 12
7:00 am EDT (1200 UTC) - Hurricane Floyd strengthened into a category 3 hurricane.
7:00 am EDT (1200 UTC) - Tropical Depression Nine strengthened into Tropical Storm Gert.
1:00 pm EDT (1800 UTC) - Hurricane Floyd strengthened into a category 4 hurricane.
September 13
7:00 am EDT (1200 UTC) - Hurricane Floyd attained its peak intensity with winds of 155 mph (250 km/h) and a minimum pressure of 921 mbar (hPa; 27.2 inHg).
7:00 am EDT (1200 UTC) - Tropical Storm Gert strengthened into Hurricane Gert.
September 14
1:00 am EDT (0600 UTC) - Hurricane Floyd weakened back to a category 3 hurricane.
1:00 am EDT (0600 UTC) - Hurricane Gert strengthened into a category 2 hurricane.
7:00 am EDT (1200 UTC) - Hurricane Floyd made landfall on Eleuthera, Bahamas with winds of 120 mph (190 km/h).
2:00 pm EDT (1900 UTC) - Hurricane Floyd re-strengthened into a category 4 hurricane sometime before making landfall in the Abaco Islands with winds of 140 mph (220 km/h).
7:00 pm EDT (0000 UTC September 15) - Hurricane Gert strengthened into a category 3 hurricane.
September 15
1:00 am EDT (0600 UTC) - Hurricane Floyd weakened back to a category 3 hurricane.
7:00 pm EDT (1200 UTC) - Hurricane Gert strengthened into a category 4 hurricane.
1:00 pm EDT (1800 UTC) - Hurricane Floyd weakened back to a category 2 hurricane.
7:00 pm EDT (0000 UTC September 16) - Hurricane Gert attained its peak intensity with winds of 150 mph (240 km/h) and a minimum pressure of 930 mbar (hPa; 27.46 inHg).
September 16
1:30 am EDT (0630 UTC) - Hurricane Floyd made landfall in Cape Fear, North Carolina with winds of 105 mph (169 km/h).
7:00 am EDT (1200 UTC) - Hurricane Floyd weakened back to a category 1 hurricane near the North Carolina/Virginia state line.
1:00 pm EDT (1800 UTC) - Hurricane Floyd weakened back to a tropical storm over the coastline of the Delmarva Peninsula.
September 17
7:00 am EDT (1200 UTC) - Tropical Storm Floyd became extratropical over southern Maine.
7:00 pm EDT (0000 UTC September 18) - Hurricane Gert weakened back to a category 3 hurricane.
September 19
1:00 am EDT (0600 UTC) - Hurricane Gert re-strengthened into a category 4 hurricane.
1:00 am EDT (0600 UTC) - Tropical Depression Ten formed in the Gulf of Mexico.
7:00 pm EDT (0000 UTC September 20) - Tropical Depression Ten strengthened into Tropical Storm Harvey.
September 20
1:00 am EDT (0600 UTC) - Hurricane Gert weakened back to a category 3 hurricane again.
7:00 pm EDT (0000 UTC September 21) - Hurricane Gert weakened back to a category 2 hurricane.
September 21
3:00 am EDT (0800 UTC) - Tropical Storm Harvey attained its peak intensity with maximum sustained winds of 60 mph (95 km/h) and a minimum pressure of 994 mbar (hPa; 29.35 inHg).
12:00 pm EDT (1700 UTC) - Tropical Storm Harvey made landfall near Everglades City, Florida with winds of 60 mph (95 km/h).
1:00 pm EDT (1800 UTC) - Hurricane Gert weakened back to a category 1 hurricane.
September 22
1:00 am EDT (0600 UTC) - Tropical Storm Harvey merged with an extratropical low.
7:00 pm EDT (0000 UTC September 23) - Hurricane Gert was downgraded to a tropical storm.
September 23
7:00 am EDT (1200 UTC) - Tropical Storm Gert became extratropical near Cape Race, Newfoundland.
October 4
1:00 am EDT (0600 UTC) - Tropical Depression Eleven formed in the Gulf of Mexico.
7:00 pm EDT (0000 UTC October 5) - Tropical Depression Eleven attained its peak intensity with maximum sustained winds of 35 mph (55 km/h) and a minimum pressure of 1002 mbar (hPa; 29.59 inHg).
October 5
7:00 pm EDT (0000 UTC October 6) - Tropical Depression Twelve formed in the mid-Atlantic.
October 6
7:00 am EDT (1200 UTC) - Tropical Depression Twelve attained its peak intensity with maximum sustained winds of 35 mph (55 km/h) and a minimum pressure of 1007 mbar (hPa; 29.74 inHg).
1:00 pm EDT (1800 UTC) - Tropical Depression Eleven dissipated in the southwestern Gulf of Mexico.
October 8
1:00 pm EDT (1800 UTC) - Tropical Depression Twelve dissipated.
October 13
1:00 am EDT (0600 UTC) - Tropical Depression Thirteen formed near the coast of Honduras.
7:00 am EDT (1200 UTC) - Tropical Depression Thirteen strengthened into Tropical Storm Irene.
October 14
7:00 am EDT (1200 UTC) - Tropical Storm Irene made landfall on Isle of Youth with winds of 70 mph (110 km/h).
2:00 pm EDT (1900 UTC) - Tropical Storm Irene made landfall on Batabano, Cuba with winds 70 mph (110 km/h).
October 15
1:00 am EDT (0600 UTC) - Tropical Storm Irene strengthened into Hurricane Irene after emerging into the Florida Straits.
8:00 am EDT (1300 UTC) - Hurricane Irene made landfall on Key West with winds of 75 mph (120 km/h).
3:00 pm EDT (2000 UTC) - Hurricane Irene made landfall in Cape Sable, Florida with winds of 80 mph (130 km/h).
October 17
During the Day, Hurricane Irene brushed, but made no landfalls on the Outer Banks of North Carolina.
1:00 pm EDT (1800 UTC) - Tropical Depression Fourteen 700 miles east of the southern Windward Islands.
October 18
1:00 am EDT (0600 UTC) - Hurricane Irene strengthened into a category 2 hurricane.
1:00 am EDT (0600 UTC) - Tropical Depression Fourteen strengthened into Tropical Storm Jose.
2:56 am EDT (0746 UTC) - Hurricane Irene attained its peak intensity with winds of 110 mph (175 km/h) and a minimum pressure of 958 mbar (hPa; 28.29 inHg).
1:00 pm EDT (1800 UTC) - Hurricane Irene weakened back to a category 1 hurricane.
October 19
1:00 am EDT (0600 UTC) - Hurricane Irene became extratropical south of Newfoundland.
1:00 pm EDT (1800 UTC) - Tropical Storm Jose strengthened into Hurricane Jose.
October 20
1:00 am EDT (0600 UTC) - Hurricane Jose attained its minimum pressure of 979 mbar (hPa; 28.91 inHg).
7:00 am EDT (1200 UTC) - Hurricane Jose strengthened into a category 2 hurricane and attained its peak winds of 100 mph (155 km/h).
11:00 am EDT (1600 UTC) - Hurricane Jose weakened back to a category 1 hurricane as it made landfall on Antigua with winds of 90 mph (155 km/h).
October 21
8:05 am EDT (1105 UTC) - Hurricane Jose weakened back to a tropical storm around the time that it made landfall on Tortola with winds of 70 mph (110 km/h).
October 24
7:00 am EDT (1200 UTC) - Tropical Storm Jose re-strengthened into a hurricane while bypassing east of Bermuda.
7:00 pm EDT (0000 UTC October 25) - Hurricane Jose weakened back to a tropical storm.
October 25
1:00 pm EDT (1800 UTC) - Tropical Storm Jose was absorbed by a large extratropical low.
October 28
1:00 pm EDT (1800 UTC) - Tropical Depression Fifteen formed about 175 miles (280 km) east of Bluefields, Nicaragua.
October 29
1:00 pm EDT (1800 UTC) - Tropical Depression Fifteen strengthened into Tropical Storm Katrina.
7:00 pm EDT (0000 UTC October 30) - Tropical Storm Katrina attained its peak intensity with winds of 40 mph (65 km/h) and a minimum pressure of 999 mbar (hPa; 29.5 inHg). Simultaneously, Tropical Storm Katrina made landfall near Puerto Cabezas, Nicaragua with winds of 40 mph (65 km/h).
October 30
1"00 a.m. EDT (0000 UTC October 31) - Tropical Storm Katrina weakened back to a tropical depression.
November 1
1:00 pm EDT (1800 UTC) - Tropical Depression Katrina dissipated while emerging into the Gulf of Mexico along the north coast of the Yucatán Peninsula.
November 13
1:00 pm EDT (1800 UTC) - Tropical Depression Sixteen formed 300 miles (560 km) west-southwest of Kingston, Jamaica.
November 14
7:00 am EDT (1200 UTC) - Tropical Depression Sixteen strengthened into Tropical Storm Lenny.
7:00 pm EDT (1800 UTC) - Tropical Storm Lenny strengthened into Hurricane Lenny.
November 15
7:00 am EDT (1200 UTC) - Hurricane Lenny briefly strengthened into a category 2 hurricane.
1:00 pm EDT (1800 UTC) - Hurricane Lenny weakened back to a category 1 hurricane.
November 16
7:00 am EDT (1200 UTC) - Hurricane Lenny re-strengthened into a category 2 hurricane.
7:00 pm EDT (0000 UTC November 17) - Hurricane Lenny strengthened into a category 3 hurricane.
November 17
7:00 am EDT (1200 UTC) - Hurricane Lenny strengthened into a category 4 hurricane.
1:00 pm EDT (1800 UTC) - Hurricane Lenny attained its peak intensity with winds of 155 mph (250 km/h) and a minimum pressure of 933 mbar (hPa; 27.55 inHg), making it the most intense hurricane in November, tied with Hurricane Michelle in 2001. Simultaneously, Hurricane Lenny also made landfall on St. Croix with winds of 155 mph (250 km/h).
November 18
1:00 pm EDT (1800 UTC) - Hurricane Lenny weakened to a category 3 hurricane. Simultaneously, Hurricane Lenny also made landfall on St. Martin with winds of 125 mph (205 km/h).
7:00 pm EDT (0000 UTC November 19) - Hurricane Lenny weakened to a category 2 hurricane. Simultaneous, Hurricane Lenny also made landfall on Anguilla with winds of 100 mph (155 km/h).
November 19
1:00 am EDT (0600 UTC) - Hurricane Lenny weakened to a category 1 hurricane. Simultaneously, Hurricane Lenny also made landfall on St. Barthelemy with winds of 85 mph (140 km/h).
1:00 pm EDT (1800 UTC) - Hurricane Lenny weakened to back to a tropical storm.
7:00 pm EDT (0000 UTC November 20) - Tropical Storm Lenny made landfall on Antigua with winds of 65 mph (100 km/h).
November 20
7:00 pm EDT (0000 UTC November 21) - Tropical Storm Lenny was downgraded to a tropical depression.
November 23
7:00 am EDT (1200 UTC) - Tropical Depression Lenny dissipated in the open Atlantic after tracking west-east across the Caribbean.
November 30
11:59 pm AST (0359 UTC December 1) – The 1999 Atlantic hurricane season officially ends.
