April 21 features a sunny, dry daytime with temperatures rising from the mid-40s to a high near 56°F and light winds. An early-morning Freeze Warning (until 9:00 AM EDT) brought sub-freezing temperatures as low as 22°F, which may have left residual ice or frost on untreated road surfaces earlier in the day; conditions improve significantly through the afternoon and early evening before rain showers become likely after 11:00 PM.
- 01 Freeze Warning was active until 9:00 AM EDT with temperatures as low as 22°F, creating potential for ice or frost on road surfaces, bridges, and overpasses during the early morning hours.
- 02 Hourly data (starting at noon) shows sunny skies, temperatures of 47–55°F, very low precipitation probability (1–4%), and low humidity — favorable driving conditions through the afternoon and evening.
- 03 Light winds of 3–8 mph throughout the day pose no significant crosswind or high-profile vehicle risk.
- 04 Rain showers become likely after 11:00 PM (60% chance per daily forecast), with precipitation probability rising to 23% by midnight — wet roads possible for late-night drivers.
- 05 No fog, no winter precipitation, and no visibility hazards are noted in the available data for the remainder of the day.
Morning slot — If you must drive early, wait until after 9:00 AM EDT when the Freeze Warning expires; allow additional time for road surfaces, especially bridges and overpasses, to thaw fully — ideally drive after 10:00–11:00 AM to be safe. Evening slot — Drive between 6:00 PM and 10:00 PM EDT for the clearest, driest conditions; avoid driving after 11:00 PM as rain showers are likely and roads will become wet.