claude-opus-5-5 Analysis · Jul 21, 2026
Unsafe
HIGH RISK
claude-opus-5-5
80% confidence
Summary
A Flood Watch is in effect through 2am July 22 with thunderstorms capable of 2-3 inches of rain per hour. Storm chances climb from about 58% at 8am to a peak of 84-98% from 6pm to 10pm, bringing a significant flash flooding and hydroplaning risk.
Hourly Forecast
7 AM 19%
5 mph
8 AM 58%
8 mph
9 AM 60%
9 mph
10 AM 60%
10 mph
11 AM 75%
12 mph
12 PM 62%
10 mph
1 PM 75%
10 mph
2 PM 53%
9 mph
3 PM 50%
9 mph
4 PM 54%
9 mph
5 PM 76%
9 mph
6 PM 84%
8 mph
7 PM 98%
8 mph
8 PM 89%
8 mph
9 PM 90%
8 mph
10 PM 68%
8 mph
11 PM 60%
8 mph
Key Factors
- 01 Flood Watch (Severe) in effect through 2am EDT July 22. The alert's listed end time of 6am conflicts with its headline and 'through late tonight' wording, so the headline window was used.
- 02 Torrential rainfall possible, with 2-3 inches per hour in heavy storms and 1-2 inches expected each for the day and the night. This raises flash flooding risk in urban, low-lying and poor-drainage areas.
- 03 Showers and thunderstorms are likely from 8am to 2pm, with precipitation chances of 58-75%.
- 04 The worst period is 5pm to 10pm, with precipitation chances of 76-98% and a peak of 98% at 7pm.
- 05 Lightning and reduced visibility in heavy downpours; very high humidity of 85-97%.
- 06 Winds are light at 5-12 mph and temperatures are 68-79F, so there is no ice or strong crosswind concern.
- 07 No visibility or gust data was provided, and no Flash Flood Warning is currently issued.
Confidence
80%
Recommendation
Avoid non-essential driving, especially 5pm-11pm. Morning slot: 7am-8am is the lowest-risk window (19% chance of precipitation), before storms become likely. Evening slot: there is no truly safe evening window; the least risky time is after 10pm (60-68% chance), but flooded roads may linger, so postponing to tomorrow is preferred. The mid-afternoon lull from 2pm-5pm (50-54%) is a secondary option. Never drive through flooded roads, and monitor for Flash Flood Warnings.