November 2011 Bering Sea cyclone

[1] Gradually intensifying, the system moved rapidly northeastward at 60 mph (97 km/h) and reached the southern Aleutian Islands by November 8, with a barometric pressure estimated at 960 mbar (hPa; 28.35 inHg).

According to the National Weather Service (NWS), the system was forecast to have sustained winds of 80 mph (130 km/h) over an area the size of Colorado.

[8] After weakening somewhat, the storm crossed the Chukotsk Peninsula around 9:00 a.m. AKST on November 9 before moving over the Chukchi Sea later that day.

Once back over water, the extratropical cyclone turned towards the northwest and was last noted as a 975 mbar (hPa; 28.80 inHg) low on November 10, about 150 mi (240 km) north of Wrangel Island, before dissipating on the next day.

In Nome, AK, tides had risen up to 7 feet (2.1 m),[13] with waters moving up to bases of people's homes.

[1][7][8] The most significant effects were felt in and around Nome where sea levels rose 8.73 ft (2.66 m) above normal, flooding low-lying areas.

Other low-pressure areas spawned by this storm were expected to bring heavy rain to British Columbia and the West Coast of the United States.

On December 22, President Barack Obama issued a disaster declaration due to the large amount of destruction caused by the storm.

[20] 2011 also saw a low pressure reach 939 mb (27.7 inHg) on April 6, however this storm was less damaging as the wind-field was strongest out to sea.

[20] Strong Bering Sea storms affecting Alaska typically form as East Asian-northwest Pacific storms, as cold, dry air masses from Siberia meet with mild and moist sub-tropical air masses off the coast of Japan where they can rapidly deepen above the Kuroshio Current, before heading towards Alaska.

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
Tropical depression (≤38 mph, ≤62 km/h)
Tropical storm (39–73 mph, 63–118 km/h)
Category 1 (74–95 mph, 119–153 km/h)
Category 2 (96–110 mph, 154–177 km/h)
Category 3 (111–129 mph, 178–208 km/h)
Category 4 (130–156 mph, 209–251 km/h)
Category 5 (≥157 mph, ≥252 km/h)
Unknown
Storm type
triangle Extratropical cyclone , remnant low, tropical disturbance, or monsoon depression