Meteorological spring begins! Meteorologists use whole months to identify seasons. Meteorological spring takes place during March, April, and May.
Astronomical spring is slightly different and begins on the spring equinox which is on March 20, 2013. Astronomical seasons change on the days the Earth is tilted closest or furthest from the sun, and those on which the sun is directly over the equator.
Normal highs the first week in March in the metro are around 44 degrees. Temperatures may climb into 40's and closer to normal on Sunday.