In Brief:
Warm weather holds through Wednesday, then rain and an inch or more of snow along I-25.
Tuesday update:
The National Weather Service forecast map for Friday AM (Figure 1 update) shows Snow (or at least a rain/snow mix) for almost all of Colorado. The first cold front begins the temperature slide around 2pm on Wednesday (Figure 2 update). A reinforcing shot of cold air lets temperatures to drop a bit further and starts the precipitation. If we get snow, it looks like rain changes to snow around midnight or a bit later Friday morning. Snow (or a rain/snow mix) should come to an end around sunrise. It is not a big window where we have both precipitation and cold enough temperatures for much snow.
Figure 2 update shows the GFS giving Longmont/Broomfield 1-3 inches, the North American Model (NAM) gives these places 2-4 inches. The forecasters at Weather5280.com gives us 1-2 inches.
End Tuesday update.
The Forecast Discussion:
We had snow! Well, there were reports of a rain/snow mix in Longmont and a trace of snow observed in Broomfield. Locations along the Front Range and I-25 corridor did see a healthy amount of snow (see green and orange dots in Figure 1).
The week ahead will be quiet with comfortable high temperatures through Wednesday (Figure 2). Even nighttime temperatures will remain close to freezing. To see our next storm chances, check out the Longer Range Forecast below.
HALLOWEEN forecast:
Temperatures on Halloween night will start off 5pm at 63F. The temperature will drop to 48F by 8pm. Winds will be light at 5mph from the west with clear skies. I plan to have my observatory open for Trick or Peek at the corner of Cherrywood Dr. and Cherrywood Way.
The Longer Range Forecast:
The next cold front arrives Wednesday (red line) with a rain and/or snow arriving mainly on Thursday (Figure 2). The snowfall map through Saturday seems to indicate that much of the I-25 folks and the mountains will see snow again. More later!
