gpt-5.1 Analysis · Jul 21, 2026
Periods of showers and thunderstorms with potentially heavy rain are expected all day and into tonight under a Flood Watch, so driving is possible but conditions may become hazardous at times, especially in the afternoon and evening. Localized flash flooding, reduced visibility, and ponding on roads are the main concerns.
- 01 Active Flood Watch through late tonight for excessive rainfall and possible flash flooding, especially this afternoon and evening
- 02 Forecast of multiple rounds of showers and thunderstorms from morning through late night, with 80–100% chance of precipitation for much of the day and night
- 03 Heavy rain possible with storms, with new rainfall totals of 1–2 inches today and another 1–2 inches tonight, and official mention of torrential rainfall up to 2–3 inches per hour in some storms
- 04 High humidity (often above 85–90%) suggests downpours could significantly reduce visibility while driving
- 05 Temperatures in the upper 60s to upper 70s (no ice risk), and winds generally light to moderate (5–12 mph), so the primary hazard is water on roads rather than wind or freezing conditions
- 06 Uncertainty about exact storm timing and intensity in specific hours, which makes short-notice hazardous conditions (e.g., quickly flooded underpasses or poor-drainage areas) possible
If you need to drive today, try to travel in the early morning, roughly between 7:00am and 9:00am, when rain chances are lower and storms are less widespread, and in the later evening, roughly between 10:00pm and 11:00pm, when storms are likely but generally trending down from the peak late-afternoon/evening period. Avoid driving in low-lying or flood-prone areas this afternoon and evening (about 2:00pm–9:00pm) when the heaviest thunderstorms and greatest flash-flood risk are expected, and never attempt to drive through water-covered roads.