gpt-5.4 Analysis · Aug 20, 2026
Unsafe
HIGH RISK
gpt-5.4
92% confidence
Summary
Driving conditions are generally unsafe later today due to a Flood Watch, multiple rounds of showers and thunderstorms, and the potential for flash flooding this afternoon through tonight. The best driving window is this morning before noon; risk rises markedly from about 2 PM through 8 PM.
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 Active Flood Watch for today into late tonight, with flash flooding possible in poor-drainage and low-lying areas.
- 02 NWS alert states rainfall rates of 1 to 3 inches per hour are possible, with localized totals of 3 to 5 inches.
- 03 Hourly forecast shows thunderstorm chances increasing after noon, becoming likely from 2 PM to 4 PM and peaking around 4 PM to 7 PM with 75% to 80% precipitation chances.
- 04 Daily forecast calls for 1 to 2 inches of new rainfall during the day and another 1 to 2 inches tonight.
- 05 Thunderstorms can rapidly reduce visibility and create water-covered roads, even though specific visibility data is not provided.
- 06 Winds are relatively light, so the main driving hazard is heavy rain and flooding rather than wind.
Confidence
92%
Recommendation
If you must drive, the safer morning window is 8:00 AM to 11:30 AM before storms develop. Avoid driving from 2:00 PM to 8:00 PM, when thunderstorms and flood risk are highest. A relatively safer evening window is 10:00 PM to 11:00 PM, but use caution because showers and thunderstorms are still possible and some roads may remain wet or flooded.