Fiesta Forecast: Heat Gives Way to Chilly Front and Lingering Showers San Antonio's Fiesta celebration is set for a dramatic weather shift, starting with heat and humidity before a strong cold front brings rain and significantly cooler temperatures, with chances of showers continuing into the following week. Fiesta attendees in San Antonio should prepare for a highly variable weather pattern as the city's renowned celebration kicks off. Initial forecasts indicate a warm and humid start, with Thursday and Friday expected to be predominantly rain-free. High temperatures will likely hover around the 90-degree mark, meaning participants will need to stay hydrated and take precautions against the heat. These pleasant, albeit hot, conditions are set to transition dramatically by the weekend. A significant cold front is projected to move through the area on Saturday morning. This front, substantial for the month of April, will bring a noticeable drop in temperatures and the likelihood of scattered light showers throughout the day. Morning temperatures in the 70s will rapidly give way to the 60s, with evening temperatures potentially dipping into the 50s. While the rainfall is not anticipated to be heavy enough to cause a complete washout of events, an umbrella is strongly recommended for any outdoor activities. Furthermore, a jacket or warmer clothing will be essential for staying comfortable as the day progresses and temperatures fall. The cooler trend will extend into Sunday, which is predicted to be cloudy and cool. However, the weather system is not expected to dissipate entirely. Showers are forecast to make a return on Monday, maintaining temperatures well below average for this time of year. In some locations, daytime highs may struggle to climb out of the 50s. Light, scattered rain is possible throughout the day, potentially impacting events like the Texas Cavaliers River Parade. Those planning to attend should anticipate chilly and possibly damp conditions, necessitating appropriate attire and flexibility in their plans. This unpredictable weather outlook, characterized by a rapid shift from summer-like heat to unseasonably cool and damp conditions, underscores the importance of staying updated on the latest forecasts. Meteorologists Sarah Spivey and Justin Horne from KSAT's Weather Authority Team are providing continuous coverage to help the public navigate these changing conditions. Spivey, a San Antonio native with deep roots in the community, brings local insight to her forecasting, while Horne, who utilizes the KSAT 12 Storm Chaser for on-the-ground reporting, ensures accurate and timely updates during significant weather events. Their expertise is crucial for ensuring that San Antonians and visitors can enjoy the festivities safely and comfortably, despite the capricious April weather