While incredibly awesome weather rolls on, we finally have a storm to focus on. But first the amazing warmth Monday can be seen in Figure 1 – oranges are how ‘above average’ the temperatures were. Longmont is around 15F up. We’ll be nice again today (Tuesday) but a dry cool front is on the way. Figure 2 shows the front just past Longmont 6pm Tuesday. Figure 3 has the front far to the south by 6am Wednesday. Note, there is no precipitation to be seen.
The longer range forecast:
But there IS a storm coming. It is still not impressive (for Longmont), but it is something! Figure 4 is the upper air map for Friday early morning. There is a broad trough over Colorado with embedded short wave troughs (red lines). The ridges are far to the west and east (blue lines.
The GFS precipitation forecast (rain and melted equivalent of water from snow, ice etc.) in Figure 5 shows the mountains to our west getting some nice water. Figure 6 shows the western slopes and north and central mountains getting some good snow… but Longmont (in this run) is on the edge of nothing – rain or snow. The gap along I-25 is the result of down slope during the storm what will warm us to the edge of snow/rain AND inhibits precipitation. Right now, Longmont only gets a trace of something wet Thursday PM into Friday AM, but we’ll watch for changes as the week goes on. Maybe you should go wash your car and leave it out at the end of the week… I’m just sayin’.