During and immediately after the rain the field is dirty full of mud. I have seen cars stuck in the mud helpless in the parking lot. Yoyr shoes and your car will be very dirty. You'd better wait a sunny day though.
Thunderstorms and walking around in the middle of a field ....seriously? But yes they probably will be open... thats their business to sell flowers
If weather says thunderstorms then you probably don't want to go.
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