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# 2007 Atlantic hurricane season

### Hurricane Dean

Category 5 hurricane (SSHS)
Duration August 13 – August 23
Intensity 175 mph (280 km/h) (1-min),  905 mbar (hPa)

A strong tropical wave moved off the west coast of Africa in the second week of August. It quickly gathered itself and turned into into a low on August 12. Tropical Depression Four was made on August 13 in the east part of the Atlantic from the tropical wave to the south of Cape Verde. The depression was already having continuing deep thunderstorms, but mostly at the west part of its spinning because of wind shear from the east.[14] The depression was supposed to become stronger a lot over the next few days[14] due to wind shear becoming more weak and warmer sea surface temperatures which made conditions better for it to become stronger.[15] The depression moved west very fast, south of a deep layered high,[16] quickly running away from the shear from the east.[17] Looking at satellite pictures and microwave and QuikSCAT information, the depression was changed to Tropical Storm Dean on August 14.[18] It was changed to a category one then a category two hurricane on August 16, 2007. It got to category three then category four on August 17, 2007. It got to category five on August 20, 2007. Dean made landfall in the Yucatan Peninsula as a category 5. The hurricane made another landfall in Mexico on August 22 and Dean died the next day.

### Tropical Storm Erin

Tropical storm (SSHS)
Duration August 14 – August 19
Intensity 40 mph (65 km/h) (1-min),  1003 mbar (hPa)

On August 9, an area of convection developed just south of Jamaica in association with a trough of low pressure.[19] The system moved west-northwestward, and by August 10 it had a broad surface trough with minimal shower activity.[20] Convection increased on August 11,[21] and by August 12 a tropical wave and an upper-level low began to merge which resulted in a large area of disorganized thunderstorms extending from the western Caribbean Sea into the central Bahamas.[22] Upper-level winds slowly became more beneficial for development, and on August 13 a large low pressure area formed about 90 miles (145 km) north-northeast of Cancún, Quintana Roo.[23] Late on August 14, a reconnaissance flight into the system reported a small circulation center, but at the time was not well-defined enough to result in the initiation of tropical cyclone advisories. However, deep convection was found near the increasingly organizing center, and at 0300 UTC on August 15 the National Hurricane Center upgraded it as Tropical Depression Five about 425 miles (685 km) southeast of Brownsville, Texas.[24]

Looking at reconnaissance info gotten from an NOAA plane investigating the depression, it was upgraded to Tropical Storm Erin on August 15.[25] It weakened to a tropical depression as it made landfall near Lamar, Texas, on August 16[26] and the NHC gave out its last advisory on the system soon after as it moved inland; but the HPC then began taking the responsibility of making advisories as long as the system was still tropical and a flood threat.[27]

Two people were killed when a warehouse broke down in Texas.[28] In all, 17 people died because of Erin.

### Hurricane Felix

Category 5 hurricane (SSHS)
Duration August 31 – September 5
Intensity 175 mph (280 km/h) (1-min),  929 mbar (hPa)

On August 31, an area of weather east of the Windward Islands became strong enough, and was named Tropical Depression Six.[29] Early on September 1, it was changed to a tropical storm and named Felix. Later that day, Felix was changed to a hurricane. On September 2, Felix was changed to a major hurricane. Felix hit land as a category 5 in northeastern Nicaragua, making it the second hurricane in 2007 to do this. At least 133 people were killed.

### Tropical Storm Gabrielle

Tropical storm (SSHS)
Duration September 7 – September 11
Intensity 60 mph (95 km/h) (1-min),  1004 mbar (hPa)

An extratropical storm off the coast of the eastern United States was classified as Subtropical Storm Gabrielle by the National Hurricane Center late on September 7. It was later reclassified as a tropical storm on September 8. After passing over the Outer Banks of North Carolina, it weakened to a depression on September 10, and the final advisory was issued the next day as it no longer had a well-defined surface circulation.

Gabrielle poured 4-6 inches of rain in the immediate area of landfall, but reports showed minimal damage and no fatalities were reported.[30]

### Tropical Storm Ingrid

Tropical storm (SSHS)
Duration September 12 – September 17
Intensity 45 mph (70 km/h) (1-min),  1004 mbar (hPa)

Tropical Depression Eight formed from a tropical wave 1130 mi (1815 km) east of the Lesser Antilles on September 12, just before the system that eventually became Humberto formed. It was slow to develop and became Tropical Storm Ingrid early on September 14. Shearing winds from a tropical upper tropospheric trough soon weakened the cyclone, it returned to depression strength on September 15, and the final advisory was issued on September 17 as the system degenerated into an open wave north of the Leeward Islands. Ingrid was the first storm of the 2007 season not to threaten land, and there were no reports of damage or casualties.

### Hurricane Humberto

Category 1 hurricane (SSHS)
Duration September 12 – September 14
Intensity 90 mph (145 km/h) (1-min),  985 mbar (hPa)

Tropical Depression Nine formed from a non-tropical low in the north-western Gulf of Mexico on September 12. Three hours later it had strengthened sufficiently to be named Tropical Storm Humberto. It rapidly became a hurricane until dissipating over North Carolina. Damage is at a half a billion dollars.

### Tropical Depression Ten

Tropical depression (SSHS)
Duration September 21 – September 22
Intensity 35 mph (55 km/h) (1-min),  1005 mbar (hPa)

An extratropical low formed off the east coast of Florida on September 18. It slowly tracked westward, breaking itself away from a trough over the Atlantic while crossing the Florida Peninsula on September 19, emerging in the Gulf of Mexico on September 20. It slowly organized itself and was classified as a subtropical depression on the morning of September 21 just south of the Florida Panhandle. Three hours later, it was reclassified as fully tropical. At 8 pm EDT (0000 UTC) later that day, Tropical Depression Ten began to move onshore, and never reached tropical storm strength.

Damage from the precursor low was reported in Eustis, Florida from one or more tornadoes that damaged or destroyed about 50 houses, but caused no serious injuries.[31]

### Tropical Storm Jerry

Tropical storm (SSHS)
Duration September 23 – September 25
Intensity 40 mph (65 km/h) (1-min),  1003 mbar (hPa)

Early on September 23, a subtropical depression formed from a previously extratropical low about 1060 miles (1710 km) west of the Azores. It quickly strengthened into Subtropical Storm Jerry later that morning while remaining far from land. It transitioned into a fully tropical storm early on September 24, but weakened the same day as it moved over cooler waters. As it accelerated northward, it strengthened back into a tropical storm and reached its peak intensity of 45 mph (75 km/h) late on September 24.[32] Shortly afterward, Jerry was absorbed into a larger extratropical low.

### Hurricane Karen

Category 1 hurricane (SSHS)
Duration September 25 – September 29
Intensity 75 mph (120 km/h) (1-min),  988 mbar (hPa)

In the fourth week of September, a very large tropical wave emerged off the coast of Africa and tracked south of Cape Verde. It slowly became organized, by early on September 25, it became a tropical depression, and 6 hours later was upgraded to Tropical Storm Karen. It was slow to become stronger at first, but on September 26, Karen quickly became stronger and was made a hurricane early in the day[33] before added wind shear stopped the intensification and began to slowly weaken the storm. Karen was declared to have been at hurricane strength by the NHC on November 27, 2007.

### Hurricane Lorenzo

Category 1 hurricane (SSHS)
Duration September 25 – September 28
Intensity 80 mph (130 km/h) (1-min),  990 mbar (hPa)

On September 21, an area of convection developed in the western Caribbean Sea in association with a trough of low pressure.[34] Convection increased and a broad area of low pressure developed on September 22 as the convection moved northwestward towards the Yucatan Peninsula.[35][36] On September 23 the area of low pressure moved over the Yucatan Peninsula and was producing thunderstorms from the southern Gulf of Mexico to the northwestern Caribbean Sea.[37] Over the next few days the broad area of low pressure was moving erratically over the southwestern Gulf of Mexico but convection remained limited due to strong upper-level winds.[38] By September 25 upper-level winds started to become more favorable for tropical cyclone formation and by that morning visible satellite imagery indicated that a tropical depression could be forming about 180 mi (290 km) east of Tampico, Mexico.[39][40]

During the evening of September 25 a United States Air Force Hurricane Hunter aircraft found that the area of low pressure had developed into a tropical depression.[41] The depression tracked slowly to the south and southwest into the Bay of Campeche. On September 26 convection increased and the depression was getting closer to being a tropical storm.[42] At 0300 UTC September 27 the Government of Mexico issued a tropical storm watch for parts of the Mexican Gulf Coast as the depression was forecasted to strengthen into a tropical storm.[43] Rapid intensification took place on September 27, and the depression became Tropical Storm Lorenzo around midday. Continued intensification that afternoon brought Lorenzo to near hurricane intensity. Early that evening, less than 7 hours after first being upgraded to a tropical storm, it was upgraded to Hurricane Lorenzo. It hit land on Mexico a little while after.

### Tropical Storm Melissa

Tropical storm (SSHS)
Duration September 28 – September 30
Intensity 40 mph (65 km/h) (1-min),  1005 mbar (hPa)

An area of low pressure associated with a tropical wave near the Cape Verde islands developed into a tropical depression on September 28, after slowly developing for almost two days.[44] Early the next day it strengthened to become Tropical Storm Melissa, the eighth named storm to form in September, tying the record for most storms to form in a month.[45] It soon weakened under the influence of shearing winds.

### Tropical Depression Fifteen

Tropical depression (SSHS)
Duration October 11 – October 12
Intensity 35 mph (55 km/h) (1-min),  1011 mbar (hPa)

On October 11, a tropical depression formed in the central Atlantic east of Bermuda out of a previously non-tropical low, which could possibly have involved the remnants of Tropical Storm Karen.[46] It dissipated without further development.

### Hurricane Noel

Category 1 hurricane (SSHS)
Duration October 27 – November 2
Intensity 80 mph (130 km/h) (1-min),  980 mbar (hPa)

During the evening of October 27, a low pressure system that had been slowly developing over the eastern Caribbean gained enough organization to be declared Tropical Depression Sixteen. It steadily intensified and became a tropical storm on the afternoon of October 28. It made landfall in Haiti on October 29, and then meandered across the western Caribbean near Cuba for the next three days. Noel brought torrential rain to the region, killing at least 120 people. It then accelerated northeastward, passing through the Bahamas before strengthening to a hurricane on November 1. Noel began an extratropical transition on November 2. While sustained winds were still at category 1 strength, the NHC issued its final advisory that afternoon. Meanwhile, the Canadian Hurricane Centre is still issuing advisories as it approaches Canadian territory.

### Tropical Storm Olga

Tropical storm (SSHS)
Duration December 11 – December 13
Intensity 60 mph (95 km/h) (1-min),  1003 mbar (hPa)

In the second week of December, after the official end of the hurricane season, a low developed east of the northernmost Lesser Antilles. It slowly acquired subtropical characteristics, and late on December 10, the NHC declared it Subtropical Storm Olga while just north of Puerto Rico. It is the first post-season storm since Tropical Storm Zeta in the 2005 season, making this season one of the few with activity both before and after the official bounds of the hurricane season. The storm made landfall on December 11 on the eastern tip of the Dominican Republic. Later that evening, Olga transitioned into a tropical storm just after making landfall. Further weakening took place and the storm degenerated into a remnant low late on December 12.

Flooding and mudslides caused at least 22 deaths - one in Puerto Rico, two in Haiti and at least 19 in the Dominican Republic.[47][48]

## Storm names

The following names will be used for named storms that form in the Atlantic basin in 2007.[49] Due to the devastation caused by Hurricanes Dean, Felix and Noel, these names were retired by the World Meteorological Organization. The names not retired from this list will be used again in the 2013 season. A storm was named Andrea for the first time in 2007. The list is the same as the 2001 list except for Andrea, Ingrid, and Melissa, which replaced Allison, Iris, and Michelle, respectively. Names that have not been assigned are marked in gray.

 Olga Pablo (unused) Rebekah (unused) Sebastien (unused) Tanya (unused) Van (unused) Wendy (unused)

## Accumulated Cyclone Energy

ACE (104kt²) — Storm:
1 35.56 Dean 8 1.10 Gabrielle
2 18.03 Felix 9 0.78 Olga
3   5.80 Noel 10 0.77 Barry
4   3.62 Karen 11 0.73 Chantal
5   1.81 Humberto   12 0.49 Melissa
6   1.48 Lorenzo 13 0.37 Erin
7   1.30 Ingrid 14 0.37 Jerry
Total: 72.21

The table on the right shows the Accumulated Cyclone Energy (ACE) for each storm in the season. ACE is, basically speaking, a measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. ACE is only calculated for full advisories on tropical systems at or exceeding 34 knots (39 mph, 63 km/h) or tropical storm strength. While Subtropical Storm Andrea was a named storm of the 2007 season, NOAA does not officially include subtropical storms' ACE ratings in season totals.[50] Andrea's ACE would have been 0.603 104kt² if it was tropical. Values accrued while Gabrielle, Jerry and Olga were subtropical are not included in their totals.

## References

1. Storms & Hurricanes in the off season
2. Knabb (2007). "Subtropical Storm Andrea Discussion Two". National Hurricane Center. Retrieved 2007-05-09.
3. National Hurricane Center. May 11 1800 UTC Tropical Weather Discussion. Retrieved on 2007-05-11.
4. Brown (2007). "May 9 Special Tropical Disturbance Statement". National Hurricane Center. Retrieved 2007-05-09.
5. Tanya Caldwell (2007). "Holly Hill surfer drowns after taking on 'gigantic wave' in New Smyrna Beach - Orlando Sentinel - Volusia County News". Orlando Sentinel. Retrieved 2007-05-10.
6. National Hurricane Center. June 1 Tropical Weather Outlook. Retrieved on 2007-06-01.
7. Kevin Spear and Jim Stratton (2007-05-12). "'Fire of a lifetime' hits North Florida". Orlando Sentinel. Retrieved 2007-05-13.
8. Staff Writer (2007). "Subtropical storm Andrea is swirling off the north Florida coastline". Bradenton Herald. Retrieved 2007-05-09.
9. CNN Staff Writer (2007). "Atlantic's first named storm whips up wildfires". CNN. Retrieved 2007-05-10.
10. Storm pummels Newfoundland - thestar.com
11. Chantal leaves 'havoc' behind in Newfoundland
12. Knabb (2007). "Tropical Depression Four Discussion One". National Hurricane Center. Retrieved 2007-08-14.
13. Knabb (2007). "Tropical Depression Four Discussion Two". National Hurricane Center. Retrieved 2007-08-14.
14. Brown/Franklin (2007). "Tropical Depression Four Discussion Three". National Hurricane Center. Retrieved 2007-08-14.
15. Rhome (2007). "Tropical Depression Four Discussion Four". National Hurricane Center. Retrieved 2007-08-14.
16. Avila (2007). "Tropical Storm Dean Discussion Five". National Hurricane Center. Retrieved 2007-08-14.
17. Beven (2007). "August 9 Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-08-14.
18. Beven (2007). "August 10 Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-08-14.
19. Rhome (2007). "August 11 Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-08-14.
20. Blake (2007). "August 12 Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-08-14.
21. Knabb/Blake (2007). "August 13 Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-08-14.
22. Franklin (2007). "Tropical Depression Five Discussion One". National Hurricane Center. Retrieved 2007-08-14.
23. Avila (2007). "Tropical Storm Erin Tropical Cyclone Update". National Hurricane Center. Retrieved 2007-08-15.
24. Avila (2007). "Tropical Storm Erin Intermediate Advisory 7a". National Hurricane Center. Retrieved 2007-08-16.
25. Avila (2007). "Tropical Storm Erin Advisory 8". National Hurricane Center. Retrieved 2007-08-16.
26. Texans, dealing with rain and flooding, brace Hurricane Dean
27. Blake/Avila (2007-08-31). "Tropical Depression Six Public Advisory One". National Hurricane Center. Retrieved 2007-08-31.
28. Jerry Allegood (2007). "Gabrielle's brush with N.C. coast gentle". The News & Observer. Retrieved 2007-09-12.
29. Topic Galleries - OrlandoSentinel.com
30. Post-Tropical Cyclone ALBERTO Forecast Discussion
31. Tropical Storm KAREN
32. Knabb (2007). "September 21 11:30 a.m. Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-09-26.
33. Beven (2007). "September 22 5:30 a.m. Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-09-26.
34. Avila and Blake (2007). "September 22 5:30 p.m. Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-09-26.
35. Knabb and Rhome (2007). "September 23 5:30 a.m. Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-09-26.
36. Franklin and Brown (2007). "September 24 5:30 p.m. Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-09-26.
37. Beven (2007). "September 25 5:30 a.m. Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-09-26.
38. Avila (2007). "September 25 11:30 a.m. Tropical Weather Outlook". National Hurricane Center. Retrieved 2007-09-26.
39. Franklin (2007). "Tropical Depression Thirteen Discussion 1". National Hurricane Center. Retrieved 2007-09-26.
40. Pasch (2007). "Tropical Depression Thirteen Discussion 4". National Hurricane Center. Retrieved 2007-09-26.
41. Franklin (2007). "Tropical Depression Thirteen Discussion 6". National Hurricane Center. Retrieved 2007-09-26.
42. Avila (2007). "Tropical Depression Fourteen Discussion 1". National Hurricane Center. Retrieved 2007-09-29.
43. Knabb (2007). "Tropical Storm Melissa Discussion 4". National Hurricane Center. Retrieved 2007-09-29.
44. Tropical Depression FIFTEEN
45. BBC NEWS | Americas | Caribbean storm death toll rises
46. Olga kills 19, thousands evacuated in Dominican Republic - DominicanToday.com
47. Tropical Cyclone Names Archived 8 September 2010 at WebCite

## Other websites

Tropical cyclones of the 2007 Atlantic hurricane season

 A B C D E F G I H 10 J K L M 15 N O
 Saffir–Simpson Hurricane Scale TD TS C1 C2 C3 C4 C5