claude-sonnet-4-6 Analysis · Apr 20, 2026

April 20 starts cold with a Frost Advisory in effect until 8 AM and a slight chance of rain showers before 10 AM, creating potential for slick spots on roads. Daytime conditions improve to partly sunny with manageable winds, but temperatures near freezing in the early morning and overnight hours elevate ice risk on untreated surfaces.

• 01 Frost Advisory was active until 8 AM EDT, with temperatures as low as 33°F, increasing the risk of frost and ice on road surfaces, bridges, and overpasses in the early morning hours.
• 02 A slight chance of rain showers (up to 19% probability) is forecast before 10 AM, with temperatures at 38–44°F during that window — cold enough for rain to freeze on untreated surfaces.
• 03 NW winds build to 10–12 mph during the afternoon with gusts up to 22 mph, which may affect high-profile vehicles and reduce stability at highway speeds.
• 04 Temperatures drop sharply overnight, reaching a low of around 30°F by early April 21, with a Freeze Warning in effect from midnight to 9 AM Tuesday — late evening driving toward midnight carries increasing ice risk.
• 05 Visibility data is not provided in the forecast, so fog or frost-related visibility reduction in the early morning cannot be fully ruled out, slightly reducing confidence.