gpt-5.4-nano Analysis · Sep 13, 2026
Unsafe
HIGH RISK
gpt-5.4-nano
78% confidence
Summary
Today (Sep 13) has an active Flash Flood Warning until 10:00 AM EDT due to thunderstorms producing heavy rain. Showers/thunderstorms are likely through late morning, creating unsafe conditions for driving, especially around flooded low-lying roads and underpasses.
Hourly Forecast
7 AM 85%
1 mph
8 AM 82%
1 mph
9 AM 63%
1 mph
10 AM 62%
2 mph
11 AM 21%
3 mph
12 PM 8%
3 mph
1 PM 6%
5 mph
2 PM 4%
5 mph
3 PM 3%
5 mph
4 PM 4%
5 mph
5 PM 3%
5 mph
6 PM 0%
3 mph
7 PM 0%
2 mph
8 PM 0%
2 mph
9 PM 0%
2 mph
10 PM 0%
2 mph
11 PM 0%
2 mph
Key Factors
- 01 Flash Flood Warning active until 10:00 AM EDT (heavy rainfall rates 1–2 inches/hour; flash flooding ongoing/expected).
- 02 Flood Watch until noon EDT indicates continued risk of flooding from excessive rainfall through the morning.
- 03 Hourly forecast shows showers and thunderstorms with very high precipitation chances from 7:00 AM through 10:00 AM, and only gradually improving conditions after 11:00 AM.
- 04 Very high relative humidity (93–100% during the morning) supports ongoing wet/hazardous road conditions.
- 05 Evening overnight hours show dry/mostly clear conditions with 0% precipitation chance after 6:00 PM, reducing risk later in the day.
Confidence
78%
Recommendation
Safer window: Evening after 7:00 PM (19:00–22:00) when precipitation chance is 0% and skies are mostly clear. Morning is not recommended until after the Flash Flood Warning ends; if you must travel, consider delaying until after 10:00 AM, when the warning expires and rain chances drop (e.g., 10:30 AM–12:00 PM).