Points to Remember. 1  Marijuana refers to the dried leaves, flowers, stems, and seeds from the hemp plant, Cannabis sativa. 2  The plant contains the mind-altering chemical delta-9-tetrahydrocannabinol (THC) and other related compounds. 3  People use marijuana by smoking, eating, drinking, and inhaling it.
A cold front is symbolized on a weather map as a line with triangles. The triangles can be thought of as icicles. Cold fronts are often coloured blue. The presence of a cold front means that cold air is advancing and pushing underneath warmer air.
Cold Temperatures In Upper Midwest; Heavy Rain and Flooding In Ohio Valley. An arctic cold front will usher frigid temperatures into the Upper Midwest for the end of the workweek. Ahead of this cold weather system, heavy rain will develop in the Ohio Valley resulting in a flood threat through Friday.