claude-opus-5-5 Analysis · Mar 21, 2026
Safe
LOW RISK
claude-opus-5-5
85% confidence
Summary
A Dense Fog Advisory is in effect until 8 AM EDT, with visibility possibly as low as one quarter mile. After that, the day is dry and mostly sunny with light to moderate winds and mild temperatures.
Hourly Forecast
7 AM 0%
8 mph
8 AM 0%
9 mph
9 AM 0%
12 mph
10 AM 0%
13 mph
11 AM 0%
12 mph
12 PM 0%
12 mph
1 PM 0%
10 mph
2 PM 0%
9 mph
3 PM 0%
8 mph
4 PM 0%
8 mph
5 PM 1%
7 mph
6 PM 1%
7 mph
7 PM 1%
5 mph
8 PM 1%
2 mph
9 PM 2%
3 mph
10 PM 2%
3 mph
11 PM 2%
5 mph
Key Factors
- 01 Dense Fog Advisory until 8:00 AM EDT with visibility possibly down to 1/4 mile. Humidity is 86% at 7 AM, falling to 73% by 9 AM, which supports fog lingering early and then clearing.
- 02 The alert's listed end time matches its start time (5:29 AM), which looks like a data error. The headline and description both say the advisory runs until 8 AM.
- 03 Precipitation chance is 0-2% through the day and evening, and 8% overnight.
- 04 Temperatures range from 45 to 58 F, so there is no freezing or ice risk.
- 05 Winds are 2-13 mph from the N/NW, with no gusts reported, so crosswind concerns are minimal.
- 06 No hourly visibility data is provided beyond the alert, so exactly when the fog clears is uncertain.
Confidence
85%
Recommendation
Avoid driving before 8 AM, and ideally before 9 AM, because of dense fog. If you must drive then, slow down, use low-beam headlights and leave extra following distance. The best morning window is 9:30 AM to 12 PM, when it is sunny and dry with good visibility. The best evening window is 5 PM to 8 PM, when it is dry with light winds and temperatures in the 50s. Later at night, conditions remain dry under mostly cloudy skies.