SOUTH FLORIDA — The National Weather Service Miami issued a significant precipitation outlook on May 21, 2026 at 9:00 AM, warning that near record atmospheric moisture arriving across South Florida at the end of the month could produce likely above normal precipitation from May 28 through June 3, 2026. The Climate Prediction Center is highlighting a 60 to 70 percent chance of above normal rainfall during this timeframe across all of South Florida.
Near Record Moisture Is the Key Driver
What makes this outlook particularly significant is the atmospheric moisture signal already being detected. Precipitable water anomaly readings across South Florida are showing values in the 99th percentile for this time of year at multiple locations simultaneously, meaning the atmosphere is carrying near record levels of moisture heading into the end of May:
City Precipitable Water Percentile
Sarasota 99.44th percentile…