The NWS Weather Prediction Center has issued a rare High Risk (level 4/4) for excessive rainfall across Southern California from Wednesday, December 24, through the morning of Thursday, December 25. 2025.
Extremely dangerous marine conditions are developing across Northern and Central California waters this week, the National Weather Service (NWS) San Francisco Bay Area warned on Tuesday, December 23, 2025. Storm Force winds are forecast across the coastal waters with Gale Force winds extending into San Francisco and Monterey bays beginning Tuesday morning. Seas are expected to build to near 6 m (20 feet) under the strongest winds, posing life-threatening conditions for mariners.
Winter Storm Warnings are in effect across parts of California from late December 23 through December 27, 2025, as a strong atmospheric river moves inland, bringing heavy mountain snowfall and high winds.
A strong atmospheric river is forecast to impact California from December 23 to 27, 2025, bringing widespread heavy rainfall, flash flooding, and high-elevation snow. The system is expected to produce 250 to 500 mm (10–20 inches) of precipitation in parts of the Sierra Nevada and 150 to 300 mm (6–12 inches) in the Coast and Transverse Ranges. The National Weather Service has issued high-risk alerts for flash flooding across southern California and moderate winter storm impacts over the Sierra Nevada.
A rare widespread snowfall event affected northern Saudi Arabia in December 2025, transforming desert landscapes and mountain ranges across Tabuk and Hail into snow-covered terrain. The snowfall occurred as a sharp cold air intrusion lowered temperatures below freezing at higher elevations, with snow settling near 2 600 m (8 530 feet) and surface temperatures reported near −4°C (25°F), according to regional media reports. Such widespread snowfall over desert areas is considered exceptionally uncommon for the region.
At least eight people have died after heavy snow, floods, and blizzards affected more than 25 provinces in Iran between December 15 and 21, 2025, according to the Iranian Red Crescent Society.
Heavy rains triggered severe flash floods in the Guci hot spring area in Central Java’s Tegal Regency on Sunday, December 21, 2025, causing widespread damage.
A major incident was declared after a canal bank collapsed on the Shropshire Union Canal (Llangollen Canal main line) near Whitchurch, Shropshire, at around 04:22 local time on December 22, 2025, triggering rapid water loss and the formation of a large sinkhole. Multiple narrowboats were affected, with at least two reported to have been pulled into the cavity.
A large lahar triggered by heavy rains on Mount Semeru trapped a man in the Regoyo River in East Java, on Sunday, December 21, 2025.
A strong earthquake registered by the USGS as M6.5 hit Papua New Guinea at 10:31 UTC (21:31 local time) on December 22, 2025. The agency is reporting a depth of 110.2 km (68 miles). EMSC is reporting M6.4 at a depth of 88 km (55 miles). There is no tsunami threat from this earthquake.
