NEW : Florida governor declares state of emergency to protect crops . Atlantic , Iowa , breaks record low set in 1958 with minus 29 degree temperature . Comment: Moderate to heavy snowfall also is possible in much of North Dakota from Tuesday to Wednesday , the weather service said . Winter storm warnings north , hard freeze warnings south .
NEW : Florida governor declares state of emergency to protect crops . Atlantic , Iowa , breaks record low set in 1958 with minus 29 degree temperature . Comment: Winter storm warnings north , hard freeze warnings south .