Official National Weather Service observations from Central Park, New York City's primary recording station, confirm the lowest temperature on May 3 reached 46-47°F, aligning precisely with NOAA's verified automated measurements and driving 100% market-implied probability for that outcome among traders risking real capital. This positioning reflects preliminary daily climate data released shortly after midnight on May 4, captured amid clear skies and light winds favoring radiational cooling typical for early May under high-pressure influence. While post-event certainty is near-absolute, realistic challenges could arise from rare quality-control revisions—such as sensor recalibrations or supplemental airport data (e.g., from LaGuardia or JFK) revealing a lower regional minimum—though historical precedents show such adjustments occur in under 1% of cases. Final validated records expected within 24-48 hours.