Atmospheric Rivers Reconnaissance, Observation, and Warning Act or the ARROW Act This bill requires the 53rd Weather Reconnaissance Squadron of the Air Force Reserve Command and the National Oceanic and Atmospheric Administration to provide aircraft, personnel, and equipment to meet the mission requirements for winter season atmospheric river reconnaissance on the U.S. west coast annually from November 1 through March 31. Among other activities, the squadron must improve the accuracy and timeliness of atmospheric river forecasts and warning services on the west coast.