gpt-5.4-mini Analysis · Jul 4, 2026
Unsafe
MEDIUM RISK
gpt-5.4-mini
92% confidence
Summary
Today starts sunny and dry, but extreme heat is in effect through 8 PM with heat index values near 100-110°F. Showers and thunderstorms become more likely after 2 PM, with the highest rain/storm risk in the late afternoon and evening.
Hourly Forecast
7 AM 2%
8 mph
8 AM 3%
9 mph
9 AM 4%
10 mph
10 AM 5%
12 mph
11 AM 6%
12 mph
12 PM 5%
12 mph
1 PM 3%
10 mph
2 PM 21%
10 mph
3 PM 36%
10 mph
4 PM 42%
10 mph
5 PM 44%
12 mph
6 PM 48%
10 mph
7 PM 50%
6 mph
8 PM 62%
3 mph
9 PM 44%
2 mph
10 PM 65%
2 mph
11 PM 56%
1 mph
Key Factors
- 01 Extreme Heat Warning until 8 PM EDT; heat index values as high as 103-110°F can increase driver fatigue and vehicle-related heat risk
- 02 Chance of showers and thunderstorms rises after 2 PM, with some storms capable of heavy rain
- 03 Evening hours show higher thunderstorm likelihood, especially around 8-11 PM, which can reduce visibility and create slick roads
- 04 No strong wind hazard is indicated, but heat and storm timing make the later day more problematic for driving
Confidence
92%
Recommendation
Best driving window this morning: 7:00 AM-10:00 AM, before the heat peaks and before thunderstorms develop. Best evening window: if you must drive, aim for 6:00 PM-7:00 PM; otherwise avoid evening travel because storm chances increase after 8 PM.