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Hail in Clear Air

Our flight from Potomac Airfield in Friendly, Md.. to Dublin, Va., (to pick up a new puppy) would take about an hour and a quarter, despite steady headwinds paralleling the Blue Ridge mountains. The only minor wrinkle came from two small cells approximately 10 miles north of our destination. The cells were staggered, traveling west to east across our route at 27 knots, with tops at 43,000 feet and 28,000 feet, respectively.

Gemini Sparkle

Key Takeaways:

  • Pilots deviated widely around two storm cells, rejecting an ATC suggestion to fly between them, believing it was safer.
  • Despite flying in clear skies 20 miles behind the cells, they unexpectedly encountered small hail, causing paint damage to the aircraft.
  • The incident revealed that hail can be suspended far behind visible storm activity, even in clear and warm air, potentially melting and evaporating before reaching the ground.
  • A key lesson learned was that an unusual "mist" on the windscreen can be a critical early warning sign of suspended hail, emphasizing the need for a much wider clearance from thunderstorms.
See a mistake? Contact us.

Our flight from Potomac Airfield in Friendly, Md.. to Dublin, Va., (to pick up a new puppy) would take about an hour and a quarter, despite steady headwinds paralleling the Blue Ridge mountains. The only minor wrinkle came from two small cells approximately 10 miles north of our destination. The cells were staggered, traveling west to east across our route at 27 knots, with tops at 43,000 feet and 28,000 feet, respectively.

Roanoke Approach confirmed that I was aware of the cells and suggested I consider passing behind the more westerly cell and in front of the more easterly one. I thanked the controller, advised that we would consider his suggestion and would report any course deviation. My friend (a pilot) and I discussed it for two minutes before deciding it was a bad plan to put ourselves between potentially dangerous cells while in a 30-knot headwind. We deviated 15 degrees west from the arrival procedure to Potomac to get 15 miles or so clearance as we passed behind both cells.

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