HUGE WHITE ARROW IN THE BLUE SKY.

I WAS ABOUT ELEVEN IN 1986. THE SCHOOL WHICH I ATTENDED WAS ABOUT ONE AND A HALF MILES AWAY AND I WOULD WALK EVERY MORNING WITH OTHER STUDENTS TO SCHOOL.
THIS PARTICULAR MORNING, AS WE WERE WALKING, THERE WAS AN UNUSUAL HEAT IN THE AIR. NORMALLY WHEN WALKING BY THE SEA, THE SEA BREEZE WOULD BE BLOWING AGAINST OUR SKINNY FRAMES.
HALF WAY ALONG THE ROAD, SOMETHING HAPPENED IN THE SKY WHICH MADE EVERYONE LOOK UP.  TO MY ASTONISHMENT AND,I ADMIT SHEER HORROR, WE ALL SAW THIS SYMBOL IN THE SKY.
SHAPED LIKE A CURVED ARROWHEAD, IT WAS WHITE IN APPEARENCE BUT THE INTENSITY OF THE COLOR CAUSED TINY REFLECTIONS. THE STRANGE THING ABOUT IT WAS THAT THERE WERE NO CLOUDS NEAR IT.  
WHEN I WOULD ASK MY FRIENDS LATER THAT DAY NONE REMEMBERED A THING.  BUT THEY WERE SO EXCITED AND SHOUTING AT THE SYMBOL IN THE SKY. 
CAN SOMEBODY RELATE TO THIS?