2007 Pacific hurricane season

The Pacific 2007 hurricane season officially began on May 15 and ended on November 30. Within this period, make the most tropical storms, since only at this time suitable conditions, such as a warm ocean, moist air and little wind shear, exist to allow the formation of tropical cyclones. Any storms that form north of the equator and east of 180 ° W longitude, belong to this basin. Storms that form in the west no longer be called hurricanes, typhoons but and belong to the Pacific typhoon season 2007.

The Pacific hurricane season in 2007 remained in terms of hurricane activity (ACE ) is significantly below average ( -60.2 %). Looking at the entire northern hemisphere, the activity was the lowest since 1977. Moreover, there was in the first half of the year between April 6 ( Tropical Storm Kong - rey ) and May 13 ( cyclone Akash ) with 37 days, the longest period without a global cyclone activity since the start of satellite observations. The number of cyclones has been relatively low, only in the years 1977 ( 22 storms ), 1979 and 1988 (26 storms ) and 1999 ( 27 storms) were observed less hurricanes.

Storms in the Atlantic are listed here.

Accumulated Cyclone Energy (ACE )

The adjacent table shows the ACE for each storm this year. The ACE describes the energy of a tropical storm by the strength of a storm is multiplied by the length of time that is long-lasting storms and severe storms have a high ACE value.

Values ​​that are written in parentheses refer to the development in the Central Pacific Basin, while the figures without parentheses show the values ​​of the storms in the eastern Pacific.

Storms

Tropical Storm Alvin

On 24 May, a nearly stationary low pressure area formed 885 km southwest of Manzanillo. Benefiting from good winds aloft could better organize the system. On May 26, the low had developed a well-defined circulation, but the associated convection was quite low. On May 27, then took the convective activity of the system dramatically and the first tropical depression of the season developed. The migrating slowly westward system could for the time being, due to poor thermodynamic conditions do not increase and an emerging disorder continued the system such that an expert of the NHC indicated that the system do not have enough convection to classify it more as a tropical cyclone to can. On May 28, however, the convection could regenerate and the system finally was able to strengthen into a tropical storm on 29 May. On the same day, the convection was limited again and the center of the storm was no longer clearly localized on satellite images. Finally, Alvin was graded back to a tropical depression on May 30th and the next day degenerated into a remnant low.

• NHC Archive for Tropical Storm Alvin ( English )

Tropical Storm Barbara

On May 27, was in the Gulf of Tehuantepec, an area of ​​non-organized convection. The next day, was formed in the system a small area of ​​low pressure and as the system in a northerly direction Pulled it could be better organized. On May 29, the system eventually organized into a tropical depression. The newly formed tropical cyclone was initially stationary and could be on May 30, supported by warm water temperatures, light wind shear and unstable air stratification, intensify into a tropical storm. It was only the third time after 1956 and 1984, which formed two named systems in the month of May.

The system finally moved to the southeast and lost on May 31, most of the organized convection. It almost degenerated into a remnant low. However, the system eventually could again strengthen and arrived on June 2 as a tropical storm on the Mexican- Guatemalan border over land and caused only minor damage.

• NHC Archive for Tropical Storm Barbara ( English )

Tropical Depression Three -E

On the evening of 9 June, the NHC realized for the first time a broad and disorganized area of ​​low pressure, which was a few hundred kilometers southwest of Acapulco. The shower activity of the system could be better organized during the night, but the system could for the time being, despite the good conditions of development, not strengthen into a tropical depression. Finally, the system achieved on July 11, enough organization to be classified as a tropical depression. The system quickly reached, however, an area with more stable air and colder ocean temperatures and never could strengthen into a tropical storm. On June 13, it degenerated into a remnant low.

• NHC archive to Tropical Depression Three -E ( English )

Tropical Depression Four -E

On 9 July, an area with increased convective activity developed about 1170 km south of Manzanillo. The ambient conditions allowed, that the system could better organize, and a well-defined area of ​​low pressure developed in the disorder. On the same day, the system was classified as a tropical depression. On 10 July, the convection of the system weakened, but he could, despite the poor conditions of development, form new again. On July 11, after the system had again lost most of the convection, it degenerated into a remnant low.

• NHC archive to Tropical Depression Four -E ( English )

Tropical Depression Five -E

On July 11, shortly after the Tropical Depression Four - E had degenerated into a remnant low, a new tropical disturbance developed about 560 km south of Acapulco. Although recognized the NHC, which had the tropical disturbance potential for further development, however, the flow conditions in the area did not encourage this. However, on July 12, the system could deep convection over the center and train on July 14 showed Dvorak reports that the system had intensified into a tropical depression. The tropical cyclone reached but quickly into an area of cooler waters and high vertical wind shear and finally dissipated on July 15 without having reached tropical storm strength ever.

• NHC archive of Tropical Depression Five -E ( English )
• NHC Tropical Cyclone Report on Tropical Depression Five -E ( PDF, English, 29 kB)

Hurricane Cosme

Two hours after the Tropical Depression Five -E had been classified earned a tropical disturbance, a surface circulation, and organized enough to be classified deep convection to also as a tropical depression.

The system first began to better organize and finally was able to strengthen into a tropical storm on July 15. On 16 July, Cosme intensified for the first hurricane in 2007. Cooler water temperatures and severe wind shear attended but soon for a rapid slowdown. However, the system could provide more organized convection and held still for a day tropical storm strength before it weakened into a tropical depression as it crossed into the Central Pacific. Cosme then moved to the northwest, and finally drifted on July 21 over 295 km south of Big Iceland, Hawaii, where it caused heavy rains and wind gusts of 65 km / hr. On 22 July, Cosme began to unravel.

• NHC archive to Hurricane Cosme ( English )
• CPHC archives to Tropical Depression Cosme ( English )

Tropical Storm Dalila

On July 20, a tropical disturbance south- southwest of the Gulf of Tehuantepec was first recognized. The NHC gave the system a good chance to slow development and on July 22, after the surface circulation of the disturbance became more pronounced, the NHC classified the system as the seventh tropical depression of the season.

Despite relatively stable air stratification and constant wind shear, the system was on 23 July strengthen into a tropical storm and finally reached the summit on 24 July his strength as a moderate tropical storm. Over the next three days Dalila reached an area with cooler ocean temperatures and degenerate on July 27th in a remnant low.

• NHC Archive for Tropical Storm Dalila ( English )

Tropical Storm Erick

On July 28, a tropical disturbance, which was about 1530 km south of the Baja California located and moved to the west was built. The next day, a broad area of ​​low pressure formed from, but slight wind shear initially hindered the development of the system. On the morning of July 31, the system was finally able to establish deep convection over the center and the NHC classified the system as the eighth tropical depression of the season. On August 1 the system because of Dvorak observations was classified Tropical Storm Erick. Erick was able to anyway, because of persistent vertical wind shear, no further help, and finally dissipated on August 2.

• NHC Archive for Tropical Storm Erick ( English )

Hurricane Flossie

On August 2, was formed about 970 km south- southeast of Acapulco, a tropical disturbance. Showers and thunderstorms activities took in connection to a small area of ​​low pressure and by the continued organization of the system presented the National Hurricane Center on August 6 states that it the following day a tropical depression could arise. The system was classified classified by the southern tip of Baja California lying as Tropical Depression Nine -E and later the same day to Tropical Storm Flossie on August 8, about 2025 km. The storm developed an eye that had a good flow of cirrus clouds in all quadrants. On August 10, the eye was more pronounced and Flossie became a hurricane upgraded .. Hurricane Flossie succeeded overnight rapid intensification and was on the morning of August 11th one severe hurricane. Shortly after the storm exceeded the 140 west longitude in the mid-Pacific.

In the central Pacific basin, the storm continued its westward course to the Hawaiian Islands back. On the afternoon of August 11 Flossie reached wind speeds of first 220 km / h, was directed on 12 August in an area with increasing vertical wind shear and the hurricane weakened slightly. However, the storm did not lose as much strength as was originally predicted, and the CPHC was the next morning a Hurrikanvorwarnung for Big Iceland from.

When the storm on August 13 Big Iceland approached, Flossie had to finally pay tribute to the wind shear and weakened from a hurricane, the intensity of which was at the lower end of the category 3. Late August 14th Flossie was downgraded to a tropical storm on August 16 and to a tropical depression, without having caused damage on land.

• NHC Archive for Hurricane Flossie ( English )
• CPHC archive to Hurricane Flossie ( English )
• Tropical Cyclone Report on Hurricane Flossie ( English )

Tropical Storm Gil

The Tropical Depression Ten -E formed on August 29, west of Manzanillo, Mexico, and was classified in the afternoon Tropical Storm Gil. Gil led to the flooding of Culiacán, Sinaloa. There, a 14 - year-old boy has been swept away by the flood waters of a river that flooded the place up to 1.5 m high. Gil was graded on 30 August to a tropical depression. On September 2, the system broke up.

• NHC Archive for Tropical Storm Gil ( English )

Hurricane Henriette

An area of ​​disturbed weather was on 30 August about 400 km south-east of Baja California to Tropical Depression Eleven -E. After the increase in wind speeds over the course of September 4, the NHC to Henriette rated highly for a category 1 hurricane. The storm reached after a further intensification of the Baja California Peninsula at Cabo del Jose on the night of September 5 as a Category 2 hurricane and brought heavy rains that claimed four lives. After reaching the coastline Henriette rapidly lost strength and was downgraded to a tropical storm. Inland the next 24 hours, the system broke up on the mainland.

• NHC archive to Hurricane Henriette ( English )

Hurricane Ivo

On September 18 was formed 1080 km south of the tip of Baja California, the Tropical Depression Twelve -E, which was incremented later Tropical Storm Ivo and on September 19 for a category 1 hurricane. While he fed on the southern part of the Baja California peninsula, the storm lost strength and on 23 September the NHC his final warning issued regarding the hurricane.

• NHC archive to Hurricane Ivo ( English )

Tropical Depression Thirteen -E

The Tropical Depression Thirteen -E formed on September 19 southwest of the Baja California peninsula. However, the system could be due to a cool surface water temperature and wind shear not develop further and dissipated on September 20.

• NHC archive to Tropical Depression Thirteen -E ( English ) 13E.
• NHC Tropical Cyclone Report for depression Thirteen -E ( PDF, English )

Tropical Storm Juliette

West -southwest of Manzanillo was formed on September 29, the Tropical Depression Fourteen -E. It intensified during the day Tropical Storm Juliette, which reaches its peak with winds of 85 km / h on September 30. Due to increasing wind shear, the system began to weaken. Juliette broke up on October 1st, without ever having been a threat to the mainland.

• NHC Archive for Tropical Storm Juliette ( English )

Tropical Storm Kiko

The Tropical Depression Fifteen -E formed on October 15, about 650 km southwest of Manzanillo. It was classified on the following day as Tropical Storm Kiko. The storm center remained almost on the spot and due to wind shear began the weakening of the system. On October 17, the system again reached the intensity of a tropical storm and moved in an easterly and northeasterly direction on the Mexican mainland and the issue of storm warnings was initiated. On October 19, changed Kiko towards northwest. On its migration route along the Mexican coast, the storm was gaining strength and achieved on October 21, just below the threshold of a hurricane its greatest strength. After that, the system weakened to a westerly course and dissipated on October 23.

• NHC Archive for Tropical Storm Kiko ( English )

Chronological overview of the season

Storm names

Names for all named storms that form in the northeastern Pacific in 2007 are taken from the list below. This is the same list that was already used during the Pacific hurricane season of 2001, with the exception of Alvin, the Adolph has replaced. Adolph was deleted for reasons of political sensitivity. The name Alvin was first used in 2007 for a storm.

• Alvin
• Barbara
• Cosme
• Dalila
• Erick
• Flossie
• Gil
• Henriette

• Ivo
• Juliette
• Kiko
• Lorena ( not awarded)
• Manuel ( not awarded)
• Narda ( not awarded)
• Octave ( not awarded)
• Priscilla ( not awarded)

• Raymond ( not awarded)
• Sonia ( not awarded)
• Tico ( not awarded)
• Velma ( not awarded)
• Wallis ( not awarded)
• Xina ( not awarded)
• York ( not awarded)
• Zelda ( not awarded)

Storms that form in the Central Pacific Ocean, between the date line and the 140th longitude are appointed on the basis of four running through lists of names. These names are used continuously. During the 2007 hurricane season no name was assigned in the mid-Pacific.

The World Meteorological Organization has none of the above names removed from the list of names of tropical cyclones, so that these names are used during the Pacific hurricane season 2013.