gpt-5.4-nano Analysis · May 9, 2026
Unsafe
HIGH RISK
gpt-5.4-nano
78% confidence
Summary
Rain showers and thunderstorms are likely to occur most of the day, with the highest precipitation risk from late morning through mid-afternoon. Patchy fog develops late evening (after about 10pm), which can further reduce visibility for nighttime driving.
Hourly Forecast
7 AM 7%
1 mph
8 AM 20%
5 mph
9 AM 24%
6 mph
10 AM 30%
8 mph
11 AM 56%
9 mph
12 PM 78%
10 mph
1 PM 92%
10 mph
2 PM 92%
10 mph
3 PM 88%
10 mph
4 PM 61%
9 mph
5 PM 39%
9 mph
6 PM 33%
8 mph
7 PM 19%
7 mph
8 PM 7%
3 mph
9 PM 3%
2 mph
10 PM 2%
1 mph
11 PM 0%
1 mph
Key Factors
- 01 Rain showers become likely around 11am and peak between about 12pm and 3pm (probability of precipitation ~78–92%).
- 02 Showers and thunderstorms are expected roughly 2pm–4pm (probability of precipitation ~88–92%), increasing hazards like sudden downpours and reduced traction.
- 03 Temperatures stay in the 50s to low 60s, so icing risk is not indicated, but wet roads are likely during the rain periods.
- 04 Visibility risk increases late evening with patchy fog from about 10pm to midnight (no visibility data provided, but fog is explicitly mentioned).
- 05 Wind is generally light to moderate (about 8–10 mph during the wettest afternoon hours), so crosswind risk is less of a concern than rain/thunderstorms and fog.
Confidence
78%
Recommendation
Safer times to drive today are: (1) Morning: about 7–9am (lower precip chances: ~7–24%). (2) Evening: after about 8pm (precip probability drops to ~7% by 8–9pm, but watch for patchy fog later around 10pm–12am). If traveling during 11am–5pm or near 10pm–12am, use extra caution for heavy rain/thunderstorms and reduced visibility.