The linear effects of TC center latitude, size, translation speed, intensification trend, and environmental pressure on the wind-pressure relationships were examined. Results show that TCs moving fast, with small size, located in low latitude and high environmental pressure tended to have higher MSLP for a given MSW. The coupled effects of several predictors are also tested. The predictors refer to MSW2 multiplying by latitude, MSW2 multiplying by TC translation speed were selected based on the stepwise predictor selection procedure. Result suggests that the effect of latitude on WPR depends on the TCs intensity. MSLP decreases as latitude increases for TCs strength weaker or equal to category 2. For TCs with the intensity scale of category 3 or higher, MSLP tends to increase as latitude increases. Meanwhile, the effect of TC moving speed on MSLP is not significant for weak TCs. MSLP increases from 925.0 hPa (SPD=0) to 979.7 hPa (SPD=30 m/s) for TCs strength as category 3, while it only increases 7.1 hPa for tropical storm. At last, a new WPR model was developed, which resulted in mean absolute error of 6.8 hPa, which shows improvement over the Dvorak (1975), AH (1977) and Koba (1991) WPR models.