| First storm formed | July 18, 2012 |
| Last storm dissipated | Season currently active |
| Strongest storm | Cindy – 115 mph (185 km/h), 949 hPa (28.03 inHg) |
| Tropical depressions | 3 |
| Tropical storms | 3 |
| Hurricanes | 2 |
| Major hurricanes | 1 |
| Total damages | £30 million (2012 USD) |
| Total fatalities | 0 |
The 2012 North Sea cyclone season was an average season with forming. The season began on July 1 and ended on October 1, 2012. The first storm of the season formed on July 18.
The North Sea cyclone basin is monitored by the British Windstorm Center (BWC) based in Dundee, United Kingdom, and the Met Office (MO) which is based in Exeter, UK.
Storms[]
Tropical Storm Alli[]
| Tropical storm | |
| Tropical storm (SSHWS) | |
 | |
| Duration | July 18 – July 24 |
|---|---|
| Peak intensity | 60 mph (95 km/h) (1-min) 984 mbar (hPa) |
An area of deep convection organised on July 18 and strengthened into a depression, according to the Met Office.[1] However, before the storm could strengthen, it made landfall in Wales with winds of 35 mph on July 20.[2] The system then significantly weakened over land,[3] but then restrengthened once it entered the North Sea. During the afternoon of July 21, the depression strengthened into Tropical Storm Alli, and moved into the BWC's area of responsibility (AoR).[4] On July 23, Alli made landfall near Berwick-upon-Tweed as a tropical depression.[5] Then in the early hours of July 24, the depression dissipated over the mountainous terrain of northern England.[6]
Hurricane Bonnie[]
| Category 2 hurricane | |
| Category 1 hurricane (SSHWS) | |
 | |
| Duration | August 2 – August 6 |
|---|---|
| Peak intensity | 90 mph (150 km/h) (1-min) 969 mbar (hPa) |
An area of intense thunderstorms was first noted off the coast of Berwick-upon-Tweed by the Met Office on July 31, where there was already a high chance (70% or more) of the system becoming a tropical cyclone within the next two days.[7] The next day, August 1, the area of investigation was upgraded to a 100% chance of forming into a depression as a circulation developed.[8] Then on August 2, the BWC had reported that a tropical depression had developed 45 miles east of Berwick-upon-Tweed.[9] Due to favorable conditions, the depression strengthened into Tropical Storm Bonnie six hours later while forecast to become a hurricane.[10] As it moved further away from land, it strengthened into the seasons first hurricane.[11] The storm continued to strengthen, peaking at 100 mph from the Met Office and 90 mph from the BWC. Before landfall, the hurricane weakened back into a tropical storm.[12] Bonnie then made landfall on Germany with sustained winds of 65 mph.[13]
Hurricane Cindy (Debby)[]
| Category 3 hurricane | |
| Category 3 hurricane (SSHWS) | |
  | |
| Duration | September 2 – September 5 |
|---|---|
| Peak intensity | 115 mph (185 km/h) (1-min) 949 mbar (hPa) |
A hurricane formed in the Atlantic on August 28, and was named Debby by the National Hurricane Center. It strengthened into a Category 3 hurricane in the next few days. On September 2, the National Hurricane Center issued their final advisory and handed over responsibility to the Met Office. Wind speeds at the time were near 115 mph.[14] As it moved into the Met Office AoR, it was renamed http://windstormarchives.weebly.com/uploads/9/9/6/7/9967708/2_september_2012_1500_utc.txt
References[]
- ↑ Tropical Depression One Advisory One
- ↑ Tropical Depression One Advisory Nine
- ↑ Tropical Depression One Advisory Eleven
- ↑ Tropical Storm Alli Advisory Thirteen
- ↑ Tropical Depression Alli Advisory Nineteen
- ↑ Tropical Depression Alli Advisory Twenty
- ↑ Tropical Weather Outlook for July 31, 2012
- ↑ Tropical Weather Outlook for August 1, 2012
- ↑ Tropical Depression Two Advisory One
- ↑ Tropical Storm Bonnie Advisory Two
- ↑ Hurricane Bonnie Advisory Five
- ↑ Tropical Storm Bonnie Advisory Eleven
- ↑ Tropical Storm Bonnie Advisory Twelve
- ↑ Hurricane Debby Advisory Twenty