A very strong earthquake registered by the USGS as M6.2 hit near the coast of Petrolia, California, U.S. at 20:10 UTC on December 20, 2021. The agency is reporting a depth of 9.3 km (5.8 miles). EMSC is reporting M6.2 at a depth of 15 km (9.3 miles). The epicenter…
An anomalous and historic December derecho, a windstorm associated with an unusually strong and fast-moving line of thunderstorms, swept from the U.S. Southwest to the Upper Midwest on December 15, 2021, traveling roughly 1 060 km (660 miles) in just over 10 hours….
Strong winds caused by a powerful storm moving through the Plains, produced a massive dust storm in eastern Colorado, Kansas and Nebraska on December 15, 2021. Strong wind gusts in excess of 160 km/h (100 mph) closed roads and knocked out power to more than 200 000…
A rapidly strengthening storm system will shift from the central Rockies to the upper Great Lakes today with widespread high winds, exceeding 110 km/h (70 mph) in some locations. Wind damage and power outages are likely with difficult to dangerous travel conditions….
A prolonged Atmospheric River will produce heavy snow across much of the U.S. West through Wednesday, December 15, 2021. Snowfall of 60 – 150 cm (2 – 5 feet) or more is likely in the Sierra Nevada, with 30 – 90 cm (1 – 3 feet) expected across much of the western…
Due to the possibility of escalating volcanic events associated with a swarm of earthquakes in the vicinity of Davidof volcano in Alaska, the Alaska Volcano Observatory (AVO) has raised the Aviation Color Code and the Volcano Alert Level for Davidof volcano to…
A violent tornado outbreak took place across the U.S. South and Midwest on Friday, December 10 into Saturday, December 11, 2021, placing more than 16 million people under a tornado watch. In 24 hours to 11:10 UTC on December 11, the NWS Storm Prediction Center…
A major winter storm will expand across the Central Plains, Upper Midwest, and Great Lakes on Friday, December 10, and Saturday, December 11, 2021. Snowfall rates of 50 mm (2 inches) per hour are possible, producing near whiteout conditions and dangerous…
The Alaska Volcano Observatory (AVO) has observed a change from the long-term deformation pattern at Okmok volcano as measured by two continuous Global Navigation Satellite Systems (GNSS) stations within the caldera between September and November 2021. The…
A bright fireball was recorded as it streaked through the night sky over Indiana at 01:04 UTC on December 8, 2021. The event lasted about 4 seconds. The American Meteor Society (AMS) has so far received 39 reports from witnesses in Ilinois, Indiana, Michigan and…
