claude-sonnet-5-5 Analysis · Sep 13, 2026
Unsafe
HIGH RISK
claude-sonnet-5-5
85% confidence
Summary
A Flash Flood Warning (until 10:00 AM EDT) and Flood Watch (until noon EDT) are active with heavy thunderstorms through late morning. Conditions improve markedly after noon with mostly dry, sunny weather and light winds.
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 for southeastern Morris County until 10:00 AM EDT: 1-1.5 inches already fallen, rainfall rates of 1-2 inches per hour, and 0.5-1 inch more possible
- 02 Flash flooding of highways, streets, underpasses, and low-lying areas is ongoing or expected; most flood deaths occur in vehicles
- 03 Flood Watch until noon EDT across a wide area including northern DE, much of NJ, and southeast PA (Philadelphia, Bucks, Montgomery)
- 04 Showers and thunderstorms at 63-85% probability from 7 AM to 11 AM, with 1-2 inches of new rain possible, so hydroplaning and poor visibility are likely
- 05 Humidity near 100% in the morning suggests reduced visibility, though no visibility data was provided
- 06 Winds are light (1-5 mph) and temperatures 68-81F, so there is no wind or ice risk
- 07 Data begins at 7 AM, so conditions before then are not covered; location-specific flooding beyond the warned area is uncertain
Confidence
85%
Recommendation
Avoid driving until at least noon and never enter flooded roads (turn around, don't drown). Safer morning window: 12:00-1:00 PM if roads in your area have drained, since precipitation chances fall to 8% or less. Safer evening window: 5:00-8:00 PM, with dry, mostly clear conditions and light winds. Check local road closures first, as standing water may linger after the warning expires. A slight chance of showers returns after 4 AM on Sept 14.