Tropical storm Dolly dissipated quickly after coming ashore yesterday in eastern Mexico but dropped heavy rain in some areas near the Gulf coast. At the same time tropical storm Norbert was approaching from the west and contributing to rainfall near Mexico's Pacific coast. TRMM-based, near-real time Multi-satellite Precipitation Analysis (MPA) data for the period from August 28 to September 4, 2014 were used in the analysis shown above. The approximate past locations of the tropical cyclones at 0000Z and 1200Z are shown overlaid in red on this analysis. The heaviest rainfall totals were found to be greater than 300 mm (~11.8 inches) over the open waters of the Pacific Ocean and near Mexico's western and Gulf coasts. Rainfall was also enhanced near inland mountainous terrain when moisture from the tropical cyclones moved over Mexico. Moisture from the two tropical cyclones is expected to stream into the southwestern United States over the next few days. This is predicted to generate storms that can cause flash floods over the southwest.