NZUS99 KBOU 051513 OPUAPA Developmental Probabilistic Snow Accumulation Forecast (APA) National Weather Service Denver/Boulder, Colorado 0913 MDT Tuesday, May 05, 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 (05/12-06/12 MDT): Rain and snow showers will continue off and on today. Precipitation intensity is expected to increase by this evening, with the rain/snow mix changing to all snow. It's difficult to specifically time this changeover, but we think by 7-9 pm it should be all snow. The snow will then continue through Wednesday morning, before ending late Wednesday afternoon. Temperatures will hover in the mid to upper 30s most of today, and then sink to around 30F or slightly colder as precipitation becomes all snow. Snowfall is not expected to accumulate on the paved surfaces until late this evening, with the most likely scenario of seeing an inch or two of slush on paved surfaces by Wednesday morning. Peak snowfall rates are expected to reach 1 inch per hour late tonight into Wednesday morning. No snow accumulation is expected on the pavement after noon Wednesday as snow intensity decreases and temperatures increase slightly. This will be a heavy, wet snow with high liquid water content. Higher accumulations as possible on non-paved surfaces where 3 to 7inches are possible with this storm. 0" T or 1" or 3" or 10" or Day/Hour MDT more more more more -------------------------------------------------- 05/12-05/15 | 100 0 0 0 05/15-05/18 | 100 0 0 0 05/18-05/21 | 75 25 0 0 05/21-06/00 | 20 80 20 0 05/12-06/00 | 0 06/00-06/03 | 10 90 55 0 06/03-06/06 | 0 100 60 5 06/06-06/09 | 5 95 55 5 06/09-06/12 | 10 90 10 0 06/00-06/12 | 0 0" T or 1" or 3" or 10" or Day/Hour MDT more more more more -------------------------------------------------- 06/12-06/15 | 75 25 0 0 06/15-06/18 | 90 10 0 0 06/18-06/21 | 100 0 0 0 06/21-07/00 | 100 0 0 0 06/12-07/00 | 0 07/00-07/03 | 100 0 0 0 07/03-07/06 | 100 0 0 0 07/06-07/09 | 100 0 0 0 07/09-07/12 | 100 0 0 0 07/00-07/12 | 0