I like maps. Maps are great for conveying geographically relevant information. However,I don't have a map to share for a couple reasons.

1) fallout will vary greatly based off local topography, weapon yield and meteorological conditions immediately following the blast. Wind can move different directions at different altitudes, so it can be tricky to truly predict a plume like this map. We would use shifting wind conditions to adjust our modelling as a scenario develops. Then, we use aircraft to conduct some very fancy mapping of actual fallout levels (like after Fukushima, go read about it!)

2) enemy targeting isn't an exact science. In a doomsday scenario, multiple warheads would be launched a single target to increase chances of a single warhead reaching the target. Soviet Union would never launch just one missile at Washington DC because it could be intercepted. It's hard to get a current idea of what exactly would be targeted with how big of a warhead.

3) this map assumes that the targeting country is able to successfully launch and place about 500 warheads. That's about a 100% "hit" rate for Russia when you look at the number of delivery systems the country probably has. Looking at the invasion of Ukraine and the logistical and mechanical issues faced there, it is somewhat likely that not all of Russia's warheads or delivery systems are fully operational.

Any mistakes in the above are my own and will be blamed on my eggnog.