I once asked an RAF forecaster if the rain was going to stop. He said that it always had up to now.
On another occasion I drove 30 miles to the airfield through the thickest fog I have ever seen. Looking out at a fog covered airfield, I rang the RAF met office at Upavon for the official RAF forecast which was absolutely cracking.
So I suggested that the fog would clear pretty quickly.
"Fog?" he said. "You've got fog?"