2007-02-11 19:05:30 · 7 answers · asked by Russell 3 in Science & Mathematics ➔ Weather
Temperature differential. There's AIR underneath a drain cover, not ground. Ground and air temperature are generally different for at least the first bit of snow fall. You'll notice that after a while, the snow stays on the cover just fine...UNLESS there's warm air coming up from under the cover.
2007-02-11 19:09:33 · answer #1 · answered by D 3 · 2⤊ 0⤋
Because the water that was snow that has melted and is making its way towards the drain as overflow heats the snow that falls on the drain cover, and you also have the factor of running water coming in to play also. Sorry if reply bit hapdash only just got up.
2007-02-11 19:10:03 · answer #2 · answered by itchy.crack i 3 · 0⤊ 0⤋
It is the evaporating water from the drain that melts the snow
2007-02-11 20:58:21 · answer #3 · answered by tom628 2 · 0⤊ 0⤋
the heat from the drain melts the snow
2007-02-11 19:16:25 · answer #4 · answered by Stan the man 7 · 0⤊ 0⤋
Because the warmth radiating up from the sewer and storm drains keeps the metal cover warmer than the snow.
2007-02-11 19:10:14 · answer #5 · answered by Mmerobin 6 · 0⤊ 1⤋
heat from the drain
2007-02-11 19:12:58 · answer #6 · answered by johnvanderwilligen 1 · 0⤊ 0⤋
huh
2007-02-11 19:15:53 · answer #7 · answered by yetunde t 2 · 0⤊ 1⤋