The tropical cyclone moved northwestward at 8 to 10 knots for the next two days and strengthened from 25 knots to 80 knots during a 36-hour period , with a ragged eye appearing on satellite imagery just before landfall on the afternoon of June 29 at a peak intensity of 85 n , making Boris a moderate Category 1 hurricane . The center crossed the south coast of Mexico midway between Lazaro Cardenas and Acapulco . The tropical cyclone moved northwestward at 8 to 10 knots , and for the next two days its maximum sustained winds strengthened from 30 m to 75 m. A ragged eye appeared on satellite imagery just before landfall on the afternoon of June 29 , at a peak intensity of 85 m. The center crossed the south coast of Mexico midway between Lazaro Cardenas and Acapulco .