Current National Weather Service and model guidance indicate Houston will experience a warm, moist southerly flow ahead of a weak frontal boundary, supporting maximum temperatures near or above the 88°F threshold on May 18. Ensemble forecasts from the National Centers for Environmental Prediction place the most likely range at 86–90°F, consistent with climatological normals of 88°F for the date and the absence of significant cool-air advection. Recent upper-air analyses show a strengthening subtropical ridge that has already pushed daytime highs into the mid-80s this week, with minimal cloud cover expected to allow strong solar heating. Updated model runs later today will refine the exact peak, but current consensus keeps the probability of 88°F or higher above 50 percent while assigning lower odds to cooler bins.