claude-opus-5-5 Analysis · May 20, 2026

Sunny, hot, and dry through midday with a Heat Advisory (heat index up to about 95F), then showers and thunderstorms develop from 1pm and become likely around 5-7pm and again around 10-11pm. Roads should be dry and clear in the morning, with wet roads and reduced visibility possible during storms later in the day.

• 01 Heat Advisory in effect until 8pm EDT, with a heat index up to about 95F. This raises the risk of vehicle overheating and driver heat stress, and it is dangerous for anyone left in a parked car.
• 02 Thunderstorm chances rise from 18% at 1pm to 52% by 4pm, and storms are likely at 64-65% from 5pm to 7pm. Expect brief heavy rain, reduced visibility, and possible lightning.
• 03 A second round of storms is likely from 10pm to 11pm (63%), with lingering showers near midnight.
• 04 West winds of 6-13 mph with gusts up to 23 mph are manageable, though stronger gusts are possible within any thunderstorms.
• 05 Expected rainfall is modest at 0.1-0.25 inch, but the first rain after hot, dry weather can make roads slick.
• 06 Visibility data is not provided, and the alert's listed effective window is inconsistent (the start and end times are identical), so the advisory's end time is taken from its text (8pm).