20 inches on Valentine's Day The mother of all snows came on Valentine's Day in 1895. Houston was hit with 20 inches of snow on Feb. 14 and 15. The snow didn't just fall in Houston. It was a massive storm that dropped snow from Tampico, Mexico, to Pensacola, Florida, and set records in New Orleans and Alabama.

While snow is a rare occurrence in Houston, historical records show it has happened sporadically over the past few decades.

Salt or the brine solution does not necessarily melt ice or snow with increased heat. It merely brings the freezing point of water to lower temperatures. At the molecular level, the salt molecules get in the way of the bonding water molecules helping it not to freeze.

While Iowa is recovering from a cold snap with negative 30 wind chill, the state is running about 20 to 30 inches below average for seasonal snowfall.

Houstonians are out and enjoying a rare snow day by having some fun sledding, but when will this snow begin to melt?