gpt-5.4-nano Analysis · Aug 20, 2026
Unsafe
HIGH RISK
gpt-5.4-nano
72% confidence
Summary
Driving today is risky due to a Flood Watch calling for rounds of showers and thunderstorms starting after noon, with rainfall amounts potentially reaching 1–3 inches per hour and localized 3–5 inches. The highest storm impacts are expected through the afternoon into early evening.
Hourly Forecast
7 AM 1%
3 mph
8 AM 3%
3 mph
9 AM 3%
3 mph
10 AM 9%
3 mph
11 AM 14%
2 mph
12 PM 23%
3 mph
1 PM 32%
5 mph
2 PM 56%
6 mph
3 PM 69%
6 mph
4 PM 80%
6 mph
5 PM 76%
7 mph
6 PM 75%
6 mph
7 PM 57%
7 mph
8 PM 46%
6 mph
9 PM 38%
6 mph
10 PM 27%
5 mph
11 PM 17%
5 mph
Key Factors
- 01 Flood Watch is active for northern New Jersey (including Morris) from noon EDT today through late tonight, with multiple rounds of showers and thunderstorms expected.
- 02 Hourly forecast shows precipitation chances rising sharply after noon (23% at 12–1pm, 56% at 2–3pm, 69% at 3–4pm, 80% at 4–5pm) with “showers and thunderstorms” persisting into 7–8pm (75% at 6–7pm).
- 03 The Flood Watch notes rainfall rates of 1–3 inches per hour are possible, with localized 3–5 inches that could cause flash flooding.
- 04 Overnight, there is mention of patchy fog between 3am and 5am (not in the main morning commute window provided by the hourly data starting at 7am), but it indicates potential low-visibility conditions around daybreak.
- 05 No visibility or wind gust data is provided, increasing uncertainty about conditions during the storms.
Confidence
72%
Recommendation
If you must drive, choose a morning window before storms intensify: 7:00am–10:00am. For evening, avoid the peak storm period and consider 9:00pm–11:00pm when precipitation chances drop (38% at 9–10pm, 27% at 10–11pm), but be prepared for intermittent heavy showers.