The graph shows the temperatures in different North Carolina cities as the jet stream moves south during part of January.
\( \div \) Wirningtion, NC
\( \div \) Raloigh, NC
\( \div- \) Boone, NC
What effect does the jet stream have on Boone from January 15 to 17 ?
Temperatures drop below \( 20^{\circ} \mathrm{F} \).
Temperatures rise above \( 50^{\circ} \mathrm{F} \).
Temperatures drop below \( 10^{\circ} \mathrm{F} \).
Temperatures rise above \( 60^{\circ} \mathrm{F} \).
