A huge amount of the resources that deal with weather emergencies are part of the US Navy. They also bring us sunrise and sunset charts, and actual “Molad” (of the new moon) calculations.
On Shabbos we announced the Molad to be 4:24:43 Monday morning Jerusalem Solar Time or about 10:04 PM tonight Eastern Daylight Time (EDT). The Navy calculated Molad is 11:04 tonight EDT.