In Brief:
A front arriving Tuesday PM begins a period of cool, showery weather.
Tuesday update:
Say goodbye to the heat! A cold front arrives around 3-4pm today and temperatures will begin to drop (blue line Figure 1 update). The temperature drop from Monday to Wednesday will be about 25-30F. Rain chances arrive with this front and with another reinforcing front that arrives Wednesday afternoon (Figure 1 update). The GFS gives us about 0.75 to 1 inch of water (very significant!! Figure 2 update). Note, the weatherunderground model keeps us below 1/4th of an inch (Figure 1 update).
The nearby mountains will see 2-5 inches of snow at the higher elevations (Figure 3 update). Go find those light jackets!
End Tuesday update.
Forecast Discussion:
We have a big change coming in the weather. This is a new development since the model runs in this weeks video. Through Tuesday, a big ridge remains in the west (Figure 2, blue line) and holds strong. We will see temperatures far above normal (mid 70s right now) as it does (Figure 1). Some smoke will keep leaking into Colorado from the West (Figure 3). It looks like the first cold front will arrive in the afternoon Tuesday.
The Longer Range Forecast:
An approaching trough (red line Figure 4) will reconnect with the cutoff low in the desert southwest (Figure 2). Some good rains return to the mountains over the next five days (Figure 5) and even some snow! (Figure 6). Return to the Longmont Leader for updates as this change approaches.
