Is It True That Snow Can Actually Increase Aircraft Engine Thrust?

Snow and jet engines have a complicated relationship. On one hand, winter operations in many countries, including the US, routinely involve departures in falling snow and sub-zero temperatures. From regional aircraft taking off at Minneapolis-St. Paul International Airport (MSP) to widebodies pushing back at New York John F. Kennedy International Airport (JFK), aircraft operate safely in conditions that look anything but friendly to machinery that depends on massive volumes of air.