The internet exploded this week over a video of some very controversial snow that doesn't appear to melt when held to a lighter. The snow, which is shown being taken from a backyard in Michigan, never forms a puddle of water despite being exposed to a source of intense heat.
Though the creator of the video, among others, has linked the phenomenon to a chem trails conspiracy theory, there's a scientific reason for why the snow seemingly disappears, while an ice cube under the same conditions forms a puddle.
Both the ice cube and the snow melt when the flame is held to them. The difference between the two, however, is their water content.
An ice cube holds a significantly higher water content than a small pile of fluffy snow. Because the amount of melting ice condenses into more water, it takes longer to evaporate and, thus, forms a puddle.
The snow, however, has a significantly lower water content than the ice and therefore, condenses, becomes slushy and evaporates before ever pooling on the ground.
The pile of snow, in this instance, is comparable to a sponge, AccuWeather.com Expert Meteorologist Bob Larson said.
"If you take a good, absorbent sponge and place it over a small puddle of water, it will soak it up," he said. "If you look closely, you see the surrounding snow soak up water from the melting snow in his video."
Water content does vary between different types of snow. The higher the water content, the more water will be left behind as it melts.
If both the ice cube and the snow were left out to melt, without an intense source of heat, the snow would have also formed a puddle, Larson said.
To answer the videographer's question: Yes, unequivocally, the cold, white stuff that fell from the sky in Michigan is snow. The light, fluffy stuff just didn't have a high enough water content, when paired with extreme heat, to result in a puddle.
Hurricane Ignacio may enhance showers and stir rough surf for the Hawaiian Islands as it approaches next week.
After Erika brings heavy rain and locally gusty winds from Hispaniola eastern Cuba into Friday night, the system will move toward the Bahamas, the Keys and South Florida this weekend.
As many as seven tropical cyclones were churning throughout the world this past week, while smoke from wildfires across the Pacific Northwest led to poor air quality across the region.
Heat and humidity will return to Harrisburg this weekend and hang on into next week.
Heat will linger in Eastern Europe for much of the fall season; meanwhile, the British Isles and northwestern Europe can expect a stormy end to the season.
Colorado Springs, CO (1978)
Hail 6 inches deep.
Rochester, MN (1979)
2.73 inches of rain fell in 50 minutes making this the wettest August on record. (9.52 inches of rain so far this month). The heavy downpour flooded the streets of Rochester, stranding about 1,500 cars.
A five-state tornado outbreak in Nebraska, Kansas, Wyoming, Iowa and Missouri occurred on this date. In all, 20 tornadoes were reported. Nine were in Iowa. One near Farragut, IA, in the extreme SW corner of the state, caused several fatalities and numerous injuries.