Overview

• An early-season atmospheric river and a revitalized North American Monsoon will deliver up to a month’s worth of rain across Washington, Oregon and British Columbia and spark thunderstorms in Arizona and New Mexico through Saturday.
• The India Meteorological Department has issued yellow, orange and red alerts for Delhi, Mumbai/Konkan and North and South Bengal through August 15–20 amid forecasts of heavy to very heavy downpours, waterlogging and landslide risk.
• The Met Office has placed parts of Scotland and Northern Ireland under yellow thunderstorm warnings as 20–70 mm of rain per hour threatens flash flooding, power cuts and travel disruption.
• England remains under extended heat-health alerts with drought management meetings underway even as incoming storms offer only partial relief for strained water supplies.
• Late-August forecasts diverge sharply, with WXCharts models predicting a cold snap around August 21 and Tropical Storm Erin poised to influence the UK’s unsettled pattern.