claude-haiku-4-5 Analysis · Jul 18, 2026
Heavy rainfall with flash flooding risk, smoke reducing visibility, and widespread thunderstorms throughout the day and evening create hazardous driving conditions on July 18. Multiple rounds of severe storms capable of producing 2-3 inches of rain within 1-2 hours will create dangerous flash flooding, especially in low-lying and poor drainage areas.
- 01 Active Flood Watch in effect from 10 AM EDT through late night July 18, with multiple rounds of heavy showers and thunderstorms capable of 2-3 inches of rainfall in 1-2 hours, leading to flash flooding in creeks, streams, and urban areas
- 02 Precipitation probability extremely high: 87-93% all day with 90% daily average; heaviest activity 11 AM-6 PM with 91-93% probability
- 03 Smoke present throughout morning and early afternoon (7 AM-5 PM) reducing visibility during initial hours
- 04 Severe thunderstorms possible throughout day and evening, with wind gusts reaching 26 mph during daytime and 24 mph at night
- 05 Showers and thunderstorms continue through late evening (through 3 AM July 19), with 87% night precipitation probability
- 06 Rainfall amounts of 0.75-1 inch expected, compounded by multiple storm rounds creating potential for rapid water accumulation and road flooding
DO NOT DRIVE if possible on July 18. If driving is absolutely essential, avoid the road entirely from 11 AM-6 PM EDT when thunderstorm activity and flood risk peak (precipitation probability 90-93%). A safer morning window exists only between 7-8 AM before precipitation increases significantly, though smoke is present. Evening travel after 11 PM EDT offers marginal improvement (55% precipitation probability), but roads may remain flooded from daytime storms. Monitor weather.gov for Flash Flood Warnings before any travel decision.