• Successive atmospheric rivers forecast to impact U.S. West Coast

    ByTeo Blašković

    Successive atmospheric rivers are forecast to affect the U.S. West Coast through October 2, 2025. The first system that impacted Washington, Oregon, and Northern California on September 29 was forecast to dissipate by late evening, while a second, stronger event associated with a cyclone near British Columbia is expected to make landfall today. Forecasts call for 25–75 mm (1–3 inches) of rain in coastal ranges and up to 200 mm (8 inches) on the Olympic Peninsula.

  • Tropical Storm Imelda forecast to strengthen into a hurricane, Humberto maintains Category 4 strength

    ByRishav Kothari

    Tropical Storm Imelda formed over the Atlantic on September 28, 2025, as Hurricane Humberto peaked at Category 5, and dropped back to Category 4. While neither of the storms is expected to make landfall over the contiguous United States, they could produce hazardous conditions for the southeastern states including Florida, South Carolina, and much of the East Coast this week.

  • Four dead as severe floods trigger hazmat risk in Globe, Arizona

    ByRishav Kothari

    Severe floods affecting Gila County and parts of central Arizona since September 25, 2025, left at least four people dead and created a major hazmat risk in Globe after around 1 000 propane tanks were washed into the downtown area. Multiple historic buildings in Globe sustained structural damage, prompting officials to declare the city center unsafe.

  • Series of atmospheric rivers to bring heavy rain to Washington, Oregon, and northern California through early October

    ByRishav Kothari

    A series of atmospheric rivers (AR) is forecast to hit the U.S. West Coast from late September through early October, beginning with a strong AR that made landfall over British Columbia on September 26, 2025. Forecasts show moderate AR conditions in Washington, Oregon, and northern California on September 28, followed by a stronger system making landfall on September 30 and potentially continuing into October 7.

  • Shallow M5.9 earthquake hits off the coast of Oregon

    ByTeo Blašković

    A shallow earthquake registered by the USGS as M5.9 hit off the coast of Oregon at 06:45 UTC on September 26, 2025 (23:45 local time, September 25). The USGS is reporting a depth of 10 km (6.2 miles). EMSC is reporting the same magnitude and depth.

  • Heavy to excessive monsoon rainfall forecast over the Desert Southwest, isolated flash flooding risk

    ByTeo Blašković

    Heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding to the Desert Southwest into Sunday, September 28, 2025. A plume of anomalously high monsoonal moisture streaming northward on the eastern flank of a slow-moving upper-level low will fuel several rounds of widespread showers and thunderstorms, with greatest impacts expected across southeastern Arizona and southwestern New Mexico.

  • Thunderstorms shift east bringing flood risk for New England and New York City area

    ByTeo Blašković

    Widespread thunderstorms are forecast across the United States on Wednesday and Thursday, September 24 and 25, 2025, as a cold front advances eastward. The Weather Prediction Center (WPC) has issued a Slight Risk of Excessive Rainfall for parts of the Ohio and Tennessee Valleys, while isolated flash flooding is possible in southern New England and the New York City metropolitan area as storms reach the Northeast.

  • NHC monitoring two tropical waves in the Atlantic basin

    ByTeo Blašković

    A tropical wave over the northeastern Caribbean Sea is producing showers, thunderstorms, and gusty winds across the Windward and Leeward Islands on September 24, 2025. The National Hurricane Center (NHC) said the disturbance will spread heavy rainfall and gusty winds into Puerto Rico and the Virgin Islands later today and into the Dominican Republic tonight, with conditions becoming more favorable for development later this week near the Bahamas. Another wave, located about 1 125 km (700 miles) east of the Leeward Islands, also has a high chance of becoming a tropical depression in the coming days.