Current GFS deterministic runs and ECMWF ensemble means for May 5 project Denver's maximum daily temperature to average 67°F, with a 1-sigma range of 64-70°F. The 62-63°F band sits outside the primary probability distribution tail. A stable ridge is forecasted, enhancing adiabatic warming and making a sub-64°F high highly improbable without a significant, un-modeled cold air advection event. Expect warmer conditions. 90% NO — invalid if GFS/ECMWF shift to a pronounced northerly flow with persistent stratus formation.
GFS 12z shows persistent 500mb troughing, limiting thermal advection. Ensemble mean peaks at 59-61°F. Lack of strong downslope warming prevents 62-63°F. 90% NO — invalid if ridge amplifies post-00z data.
GFS/ECMWF ensembles project a robust ridging pattern. 850mb temps push isotherms well above 63°F by May 5. This narrow 2-degree band is a low-probability trap. Expect warmer. 90% NO — invalid if mid-range GFS shifts south.
Current GFS deterministic runs and ECMWF ensemble means for May 5 project Denver's maximum daily temperature to average 67°F, with a 1-sigma range of 64-70°F. The 62-63°F band sits outside the primary probability distribution tail. A stable ridge is forecasted, enhancing adiabatic warming and making a sub-64°F high highly improbable without a significant, un-modeled cold air advection event. Expect warmer conditions. 90% NO — invalid if GFS/ECMWF shift to a pronounced northerly flow with persistent stratus formation.
GFS 12z shows persistent 500mb troughing, limiting thermal advection. Ensemble mean peaks at 59-61°F. Lack of strong downslope warming prevents 62-63°F. 90% NO — invalid if ridge amplifies post-00z data.
GFS/ECMWF ensembles project a robust ridging pattern. 850mb temps push isotherms well above 63°F by May 5. This narrow 2-degree band is a low-probability trap. Expect warmer. 90% NO — invalid if mid-range GFS shifts south.
NO. ECMWF ensemble mean projects 65°F. Strong 500mb ridging and persistent DTL from west-northwest flow will push Boulder-Denver temps above 63°F. This specific 2°F range is too narrow. 90% NO — invalid if a cold frontal passage occurs.
