radio reports telling you to seek shelter
A PUP is not shelter in this regard.
Every RV is up off the ground, meaning wind can get under it. A PUP has wings in addition to being relatively light weight. Don't chance it - get out and seek real shelter.
If your spidey sense is tingling and others are telling you to seek shelter, better not wait for the weather to say "told you so."
We've ridden out some very strong thunderstorms in the PUP. Once, with the winds going but not enough to mess with the PUP, we got out because there were trees above us and branches do fall under those conditions. Everything was fine but there's no guarantee.