Tuesday, April 24, 2018

Light Showers Before End Of Month?

First time in a while for an am cloud photo - iridescence (sun dog?) at 22 degrees north of sun but no clouds to south.

As high pressure moves south over the Plains late in week, moisture increases on its west side. Shown above is 00 UTC WRF-GFS forecast (on the 5.4 km grid) for PW valid at 6:00 am MST on Saturday morning (28 April). Highest values remain along and east of Continental Divide but moisture does increase some into southeastern Arizona.

The GEFS plumes for QPF reflect this moisture gradient - shown below from top to bottom are: QPF forecasts for Tucson (top); Douglas (middle); and Deming, New Mexico (bottom). 

So, a bit of possible weather activity to monitor rest of week.

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