Recent ensemble forecasts from the National Weather Service highlight a moderating springtime air mass over the Northeast, with projected overnight lows for New York City on May 18 centering around 54–56°F amid partly cloudy skies and light winds. This setup creates tight clustering in market-implied odds between the 60–67°F bins because small variations in cloud cover, dew-point depression, and boundary-layer mixing across model runs can shift the minimum by several degrees. Clearer conditions would favor radiational cooling toward the lower end of the range, while higher humidity or increased southerly flow could limit the drop and push readings into the low 60s. The next GFS and ECMWF updates, expected within 24 hours, will narrow these uncertainties ahead of the resolution window.