claude-opus-5-5 Analysis · Jul 18, 2026
A Flood Watch covers 10 AM through late tonight, with multiple rounds of heavy showers and thunderstorms (some possibly severe) likely from late morning into the night, plus smoke through the afternoon. Flash flooding, reduced visibility and hydroplaning make driving hazardous for most of the day.
- 01 Flood Watch (Severe) in effect from 10 AM EDT through late tonight; storms could drop 2 to 3 inches of rain in 1 to 2 hours, causing flash flooding of roads, poor-drainage and urban areas, and low-lying spots.
- 02 Precipitation chance climbs from 15% at 7 AM to 49-64% between 8 and 11 AM, then 87-93% from 11 AM to 7 PM, with showers and thunderstorms continuing (55-84%) through midnight.
- 03 Forecast says some storms could be severe, day and night.
- 04 Smoke is forecast from 7 AM through 6 PM, which may reduce visibility. No numeric visibility values were provided.
- 05 Wind gusts up to 26 mph during the day and 24 mph tonight may affect high-profile vehicles, and stronger storm gusts are possible.
- 06 Overnight rain before 3 AM may leave lingering road flooding even as storm coverage decreases.
Morning slot: drive between 7:00 and 8:00 AM, when rain chances are lowest (15%). Use headlights for smoke and finish before 8 to 9 AM as storm chances rise. Evening slot: no window is truly low-risk. If travel is necessary, the least risky period is about 10:00 to 11:59 PM, when chances drop to 55-66%. Avoid 11 AM to 8 PM, the peak storm and flash-flood period. Never drive through flooded roads (turn around, don't drown), slow down to avoid hydroplaning, and check for Flash Flood Warnings before leaving.