NZUS99 KBOU 182036 OPUAPA Developmental Probabilistic Snow Accumulation Forecast (APA) National Weather Service Denver/Boulder, Colorado 1436 MDT Monday, May 18, 2026 -------------------------------------------------------------------------------- This developmental product contains the probabilities (%) that the given snow amounts (inches) will occur at Centennial Airport during the respective 3 hour or 12 hour periods. The probabilities indicate the amount of snow that is expected to accumulate on runways and other concrete surfaces at APA. [T (trace) means more than zero.] -------------------------------------------------------------------------------- Discussion (18/15-19/18 MDT): Rain will diminish through the early evening hours, and there's just a 30% chance of a few snowflakes mixing in during the evening hours. Any lingering showers will end overnight. No snow accumulation will occur due to warm air and pavement temperatures. 0" T or 1" or 3" or 10" or Day/Hour MDT more more more more -------------------------------------------------- 18/15-18/18 | 100 0 0 0 18/18-18/21 | 100 0 0 0 18/21-19/00 | 100 0 0 0 19/00-19/03 | 100 0 0 0 19/03-19/06 | 100 0 0 0 18/18-19/06 | 0 19/06-19/09 | 100 0 0 0 19/09-19/12 | 100 0 0 0 19/12-19/15 | 100 0 0 0 19/15-19/18 | 100 0 0 0 19/06-19/18 | 0 0" T or 1" or 3" or 10" or Day/Hour MDT more more more more -------------------------------------------------- 19/18-19/21 | 100 0 0 0 19/21-20/00 | 100 0 0 0 20/00-20/03 | 100 0 0 0 20/03-20/06 | 100 0 0 0 19/18-20/06 | 0 20/06-20/09 | 100 0 0 0 20/09-20/12 | 100 0 0 0 20/12-20/15 | 100 0 0 0 20/15-20/18 | 100 0 0 0 20/06-20/18 | 0