• Cross-polar flow and weak polar vortex drive early-season cold anomaly across North America

    A strong early September cold air intrusion is forecast to affect much of the central and eastern United States from September 3 to 7, 2025, with daytime highs of 15–20°C (59–68°F) and overnight lows of 7–9°C (44–48°F) across the Midwest and Great Lakes, up to 10°C (18°F) below average for this time of year. This development also marks a rapid seasonal transition. 

  • Tropical Storm Fernand forms southeast of Bermuda

    Tropical Storm Fernand formed on August 23, 2025, southeast of Bermuda as the sixth named storm of the 2025 Atlantic hurricane season. The system is currently moving north-northeast, with weakening forecast in the coming days.

  • Charleston sets new rainfall record as a stalled cold front triggers flash floods in South Carolina

    Charleston broke a daily rainfall record as a stalled cold front over the southeastern United States dropped up to 300 mm (12 inches) rain in Charleston County, on Friday, August 22, 2025. The system also affected parts of southeastern Georgia, prompting Level 2 of 4 flash flood risk alerts from the Weather Prediction Center, with rainfall rates exceeding 75 mm (3 inches) per hour and localized accumulations up to 150 mm (6 inches) expected through Sunday, August 24.