This ty pe of avalanche activity is most likely to occur when nighttime temperatur es remain above freezing for several nights.
(This ty pe of avalanche activity; is; most likely to occur) (This ty pe of avalanche activity; to occur; T:when nighttime temperatur es remain above freezing for several nights) (nighttime temperatur; remain; above freezing for several nights)
This ty pe of avalanche activity This ty pe of avalanche activity nighttime temperatur
is to occur remain
most likely to occur
T:when nighttime temperatur es remain above freezing for several nights
above freezing for several nights