Iceberg A-23B Has Calved from Iceberg A-23A in the northern Weddell Sea

The U.S. National Ice Center (USNIC) has confirmed that iceberg A-23B calved from A-23A in the northern Weddell Sea. As of January 31, A-23A was centered at 56° 47' South and 40° 19' West and measured 40 nautical miles on its longest axis and 32 nautical miles on its widest axis.

Iceberg A-84 Has Calved From Brunt Ice Shelf

The U.S. National Ice Center (USNIC) has confirmed that iceberg A-84 calved from the George VI ice shelf. As of January 31, A-84 was centered at 72° 41' South and 75° 48' West and measured 16 nautical miles on its longest axis and 9 nautical miles on its widest axis.

With the colder temperatures observed over the DC region, significant ice formation has been observed across waterways in the area. Remember, walking on ice is extremely dangerous - ice can be unpredictable and subject to breakup and movement with no warning. View Safety on Ice poster.

Sentinel-2 satellite imagery shows ice across the DC region. The thickest ice is observed behind the I-395 bridge and along parts of the eastern shore near the intersection of the Anacostia and Potomac Rivers. Significant ice was first observed in the region over two weeks ago and began as primarily diurnal (nighttime) ice but has since greatly expanded in coverage and been consistently present throughout the day. As temperatures warm up through the weekend, ice concentrations are expected to decrease.

Arctic Sea Ice at Minimum Extent

The U.S. National Ice Center (USNIC) has determined the 2024 minimum Arctic sea ice extent occurred in late-September 2024 with an area of 4.42 million square kilometers based on analysis from the USNIC’s Interactive Multisensor Snow and Ice Mapping System (IMS), used in the Multisensor Analyzed Sea Ice Extent (MASIE) product, jointly created with the National Snow and Ice Data Center (NSIDC).

Icebergs B-22F and B-22G Have Calved from B-22A in the Amundsen Sea

The U.S. National Ice Center (USNIC) has confirmed that icebergs B-22F and B-22G calved from iceberg B-22A in the Amundsen Sea. As of August 15th, B-22A was centered at 72°41' South and 126°14' West and measured 33 nautical miles on its longest axis and 26 nautical miles on its widest axis.

Iceberg A-83 Has Calved From Brunt Ice Shelf

The U.S. National Ice Center (USNIC) has confirmed that icebergs A-83 calved from the Brunt Ice Shelf. As of May 21, A-83 was centered at 75°21' South and 25°29' West and measured 20 nautical miles on its longest axis and 7 nautical miles on its widest axis.

Iceberg A-76N Has Calved from Iceberg A-76B in the Weddell Sea

The U.S. National Ice Center (USNIC) has confirmed that icebergs A-76N calved from iceberg A-76B in the Weddell Sea. As of May 17, A-76N was centered at 63°46' South and 54°02' West and measured 12 nautical miles on its longest axis and four nautical miles on its widest axis. A-76B was centered at 63°23' South and 53°42' West and measured 17 nautical miles on its longest axis and 7 nautical miles on its widest axis.

Iceberg D-33C Has Calved from Iceberg D-33B in the Weddell Sea

The U.S. National Ice Center (USNIC) has confirmed that icebergs D-33C calved from iceberg D-33B in the Weddell Sea. As of April 14, D-33B was centered at 72°28' South and 18°58' West and measured 20 nautical miles on its longest axis and 7 nautical miles on its widest axis. D-33C was centered at 72°27' South and 18°36' West and measured 15 nautical miles on its longest axis and 7 nautical miles on its widest axis.

Arctic Sea Ice at Maximum Extent

The U.S. National Ice Center (USNIC) has determined the 2024 maximum Arctic sea ice extent occurred in mid-March 2024 with an area of 15.14 million square kilometers. This estimate is based on analysis from the USNIC’s Interactive Multisensor Snow and Ice Mapping System (IMS), used in the Multisensor Analyzed Sea Ice Extent (MASIE) product, and is created jointly with the National Snow and Ice Data Center (NSIDC).

Great Lakes Reaches Maximum Ice Coverage for 2023-2024 Season

The U.S. National Ice Center (USNIC) has determined the Great Lakes experienced its annual maximum ice coverage for the 2023-2024 ice season on January 22, 2024. This annual maximum was estimated at 17.68% coverage, which is significantly lower than the average annual maximum of 53%¹ coverage; the 2023-2024 maximum was also observed to occur approximately one month earlier than the annual normal.

Iceberg D-36 Has Calved From the West Ice Shelf

The U.S. National Ice Center (USNIC) has confirmed that iceberg D-36 calved from the West Ice Shelf. As of February 05, D-36 was centered at 66°18' South and 86°37' East and measured 11 nautical miles on its longest axis and 5 nautical miles on its widest axis.

Iceberg D-30C Has Calved from Iceberg D-30A in the Weddell Sea

The U.S. National Ice Center (USNIC) has confirmed that iceberg D-30C calved from iceberg D-30A in the Weddell Sea. As of February 02, D-30A was centered at 53°16' South and 36°04' West and measured 23 nautical miles on its longest axis and 9 nautical miles on its widest axis. D-30C was centered at 54°04' South and 35°30' West and measured 13 nautical miles on its longest axis and 6 nautical miles on its widest axis.

Iceberg D-35 Has Calved From Borchgrevink Ice Shelf

The U.S. National Ice Center (USNIC) has confirmed that iceberg D-35 calved from Borchgrevink Ice Shelf. As of January 08, D-35 was centered at 70°01' South and 21°37' East and measured 29 nautical miles on its longest axis and 6 nautical miles on its widest axis.

Iceberg A-82 Has Calved From George VI Ice Shelf

The U.S. National Ice Center (USNIC) has confirmed that iceberg A-82 calved from the George VI ice shelf. As of December 12, A-82 was centered at 72°51' South and 72°24' West and measured 12 nautical miles on its longest axis and 6 nautical miles on its widest axis.

Iceberg D-34 Has Calved From West Ice Shelf

The U.S. National Ice Center (USNIC) has confirmed that iceberg D-34 calved from the West Ice Shelf. As of October 19, D-34 was centered at 67°11' South and 82°7' East and measured 11 nautical miles on its longest axis and 8 nautical miles on its widest axis.

Antarctic Ice Shelf

Antarctic ice shelf has been updated to the 2022 version and is available in GIS shapefile format.

Regional Synopsis

The U.S. National Ice Center has developed a new series charts. Regional Synopsis charts breaks out each region of the Arctic and Antarctic into a high quality regional charts along with an environment synopsis write-up. Charts will be updated weekly. Please take a look.

Animated Charts

Added animated charts of our Arctic and Antarctic MIZ, and IMS snow and ice charts.

Trivariate Products

A comprehensive look at ice conditions over a period time, from a single year to a comparison set starting from 2007. Produced for the Arctic and Antarctic.