Hurricane hunters are aircrews that fly into tropical cyclones to gather weather data. 

In the U.S., the organizations that fly these missions are the United States Air Force Reserve's 53rd Weather Reconnaissance Squadron and the National Oceanic and Atmospheric Administration's Hurricane Hunters. Such missions have also been flown by Navy units and other Air Force and NOAA units.

Track U.S. Air Force C-130J: https://www.radarbox.com/data/flights/TEAL72

The civilian and NOAA Corps crew members of the NOAA Hurricane Hunters mainly perform surveillance, research, and reconnaissance with highly instrumented aircraft including airborne Doppler weather radar measurements in both Atlantic and Pacific storms from a new facility at Lakeland Linder Airport in Lakeland, Florida.

They fly two Lockheed WP-3D Orion aircraft, heavily instrumented flying laboratories modified to take atmospheric and radar measurements within tropical cyclones and winter storms, and a G-IV Gulfstream high-altitude jet above 41,000 feet (12 km) to document upper- and lower-level winds that affect cyclone movement. 

Track NOAA P-3 Orion: https://www.radarbox.com/data/flights/NOAA42

The computer models that forecast hurricane tracks and intensity mainly use G-IV dropsonde data collected day and night in storms affecting the United States.