Game Flavor - Rapid weather change during an evening campout in the Wilderness

The party has made camp on a warm fall evening looking forward to a good night's sleep.

At this point, a DC 10 survival check predicts a warm, cloudless, windless, and moisture less night.  But during a ten minute period, the temperature drops and goes from a warm evening to a cool evening.

A DC 15 Passive Investigation check makes a character sense that the temperate has dropped pretty quickly since sunset.  After another 10 minutes some light clouds appear in the sky, and then after another 20 minutes the sky is overcast.

A DC 10 survival check predicts a light rain to start falling soon, DC 20 survival check predicts hail and strong winds.  After another 10 minutes the winds strengthen to moderate, and then over the next 20 minutes it begins to rain.

A DC 10 survival check predicts stronger winds and a cold wintry blast coming, a DC 20 check predicts hail and gale force winds.  A DC 15 Nature check suggests this is not natural.  A DC 20 Arcana check suggests this is a Control Weather spell.  During the next 30 minutes the temperate changes to cold, and in 10 minutes the rain turns to hail.  Within another 30 minutes the temperature becomes "Artic cold" which means below zero and the snow becomes sleet.

The party can choose to stay put and endure it, or to move.  If they move 2 miles they find the weather to be very similar to what it was when they made camp.  The cause of all of this is a powerful druid is trying to drive an infestation of salamanders out of the area.  The druid doesn't want to kill them, just make them want to leave as they were brought to the area recently and not naturally.  The druid is using the Control Weather spell.