The Earth is under a constant salvo of high-energy charged particles known as cosmic rays (CRs). These can penetrate the Earth’s magnetosphere and enter the Earth’s atmosphere, where they contribute to the radiation environment at high altitudes. During large solar eruptions, large fluxes of solar energetic particles (SEPs) can be created via acceleration processes at the Sun. SEPs can pose a serious space weather risk to aircrews and airline passengers if the eruption is directed towards the Earth by enhancing the radiation environment at aviation altitudes. SEPs with enough energy are detected at the ground by registering their secondary particles, created by induced atmospheric cascades, at ground-based detectors, such as neutron monitors (NMs), this event is known as a ground-level enhancement (GLE). With the impact of space weather events, such as GLEs, being further understood the desire for strong nowcasting capabilities for dangerous events is prominent within modern society. A newly developed model for computing the radiation dose at certain altitudes as a result of GCRs and SEPs was used to determine the effective dose received during numerous GLE events. A comparison of these computed doses and respective NM count rates during the GLEs shows a good correlation. A model with a good correlation, such as this, can provide invaluable assistance and gives the scientific basis for the development of space weather nowcasting tools, helping to mitigate the hazardous effects GLEs can have on the aviation industry.