claude-opus-5-5 Analysis · Aug 20, 2026
Unsafe
HIGH RISK
claude-opus-5-5
80% confidence
Summary
The morning is dry and sunny, but a Flood Watch covers noon through late tonight. Showers and thunderstorms are likely from early afternoon into the evening, with rainfall rates of 1 to 3 inches per hour possible and a flash flooding risk.
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 A Flood Watch (Severe) for Morris County, NJ is in effect from noon today through late tonight. Its description runs to 2:00AM EDT Aug 21, although the listed end time says noon, so the window is somewhat inconsistent.
- 02 Rain chances climb from 23% at noon to 56-80% between 2pm and 7pm, peaking at 80% around 4-5pm.
- 03 Rainfall rates of 1 to 3 inches per hour are possible, with localized totals of 3 to 5 inches. This could flood poor-drainage roads, underpasses and low-lying areas, raise hydroplaning risk and sharply reduce visibility.
- 04 Thunderstorms bring lightning and sudden downpours, and roads may stay flooded after the rain ends.
- 05 Rain chances stay at 27-46% from 8pm to 11pm, with storms possible until about 1am and patchy fog from 3am to 5am.
- 06 Winds are light (2-7 mph) and temperatures are warm (67-83F), so there is no wind or ice concern.
- 07 Visibility data is not provided directly.
Confidence
80%
Recommendation
Drive in the morning between 7am and 11am, when conditions are sunny and rain chances are under 10%. Avoid driving from about 1pm to 9pm, the heaviest storm and flash-flood window. If you must travel in the evening, go after 10pm, when rain chances fall below 30%, but stay alert for lingering flooded roads. Never drive through water-covered roads, and watch for Flash Flood Warnings. Avoid the 3am to 5am fog period if possible.