Learned the hard way in the mid 1980's how fast thunderstorms can funnel into the Eastern Sierra passes.
We were fishing Rush Creek along the June Lake Loop when my brother had fallen into the creek crossing over.
The weather was sunny and warm in the 80's. Once the lightning strikes, hail and wind had kicked up, the temp dropped 30 degrees and my brother was going into hypothermia.
We made a sprint to the car about a 1/2 mile away with our damn lightning rods (fishing rods) pointing skyward as bolt strikes hit the crags near where Silver Lake emptied into Grant Lake.
Lesson learned!