Severe winter weather from a powerful nor'easter slamming the Northeast has driven over 600 US flight cancellations on March 25, fueling trader consensus at 89% implied probability for "Yes." Real-time FlightAware data confirms more than 650 cancellations by midday, concentrated at major hubs like Boston Logan, Newark, and LaGuardia, where heavy snow, high winds, and low visibility grounded operations. The storm's rapid intensification over the past 48 hours, following warnings from the National Weather Service, prompted preemptive airline cuts starting March 24, with impacts peaking today amid travel disruptions affecting thousands. While totals could climb higher by midnight—market resolution deadline—current counts and historical storm precedents solidify strong "Yes" sentiment, though minor recovery flights might temper the final tally.