Summary of the 2010 Atlantic Hurricane Season

Throughout the summer I have updated the blog on the progress of the hurricane season. Now, and assuming that the season is over, it is time to look at the full picture and summarize the main features. In the figure below the tracks of the 19 storms that developed in the season are shown. The … Continue reading “Summary of the 2010 Atlantic Hurricane Season”

Seasonal Forecasts

The 2-meter temperature anomaly forecasts averaged over three-month periods from November 2010 to June 2011 from NCEP’s Coupled Forecast System (CFS) model are shown below (additional fields including SST and wind anomalies are available here). The most striking features are the strong negative anomalies over Alaska during the coming winter and early spring (a result … Continue reading “Seasonal Forecasts”

Arctic and Antarctic Sea Ice

The US National Snow and Ice Data Center has reported on 27th September that Arctic sea ice appears to have reached its annual minimum extent on 19th September. On that day it covered an area of 4.60 million square kilometers (1.78 million square miles). This year’s minimum was the third-lowest in the satellite record, after … Continue reading “Arctic and Antarctic Sea Ice”

Fujiwhara Effect

The Fujiwhara effect describes the rotation of two storms around each other. It’s most common with tropical cyclones but also occurs in other cases. A good way to picture this is to think of two ice skaters who skate quickly towards each other, nearly on a collision course, grab hands as they are about to … Continue reading “Fujiwhara Effect”

Tropical Parade in the Atlantic

While most of the attention is focused on Hurricane Earl, tropical storms Fiona and Gaston (and a strong tropical wave off Africa) complete the tropical parade in the Atlantic. As of 12:00 UTC, Hurricane Earl was located about 355 miles (575km) south of Cape Hatteras. Earl has maximum sustained winds of 145mph (230kph) as it … Continue reading “Tropical Parade in the Atlantic”

Hurricane Earl and Tropical Storm Fiona

Earl is a powerful Category 3 hurricane now located northeast of the Bahamas. As of 9:00 a.m., UTC, Hurricane Earl was located at 24.0°N, 71.2°W, or 175 miles (280km) north of Grand Turk Island and 815 miles (1315km) south-southeast of Cape Hatteras, North Carolina with maximum sustained winds of 125mph (205kph). Earl is moving to … Continue reading “Hurricane Earl and Tropical Storm Fiona”

Atlantic Hurricane Season About to Get Busy

The North Atlantic has been very quiet since Hurricane Alex in late June. Alex was the strongest storm in terms of wind speed in the month of June since Alma (1966). However, and according to NOAA’s 2010 Updated Atlantic Hurricane Season Outlook issued on 5th August, the Atlantic Basin remains on track for an active … Continue reading “Atlantic Hurricane Season About to Get Busy”

Atlantic Tropical Basin Heating Up

After a relatively quiet start, the tropics are beginning to show some signs of life in the far-eastern Atlantic. An elongated cluster of showers and thunderstorms over the southeastern Atlantic is slowly organizing as it moves generally west to west-northwest. Dry air remains to the north as the system is experiencing little in the way … Continue reading “Atlantic Tropical Basin Heating Up”