Answer:
Turn around.  Find a runway that, by the time you land, you will still be 15 miles away from the storm, which generally moves at 20-25 miles an hour. 

Answer:

Pull power back to 2000 rpms. Land as soon as practical (the nearest airport that you can have a mechanic look at the plane within reason - you have about 10 minutes before you need to land). 

Answer:

Continue cranking the plane for thirty seconds.  If the engine starts, pull the mixture all the out, turn the fuel cut-off to off, and have a mechanic look at the plane.  If it doesn't start within thirty seconds, turn the fuel cut-off to off, get out of the plane, and use a fire extinguisher on the fire.  

Answer:

"Declare an emergency. Assuming you are turning a left downwind, mixture idle cutoff, crack the cabin doors, shutoff master, pull 20 degrees of flaps and slip the plane toward the runway." - Anonymous

Answer:
Make a normal landing when it is practical.  Since the latch is broken, don't try to close the door.