Friday, May 05, 2017

First 100 F Day Was Yesterday

High temperature at NWS ASOS at the airport reached 100 F around 04:00 pm MST yesterday afternoon. So that's that as we head for summer. Big question now is whether we'll get rain next week after a dramatic cool down.

Very windy conditions will prevail over much of Arizona tomorrow afternoon as the closed low develops in mid-levels to our west-northwest. The above forecast is from the 00 UTC WRF-GFS and is valid at 04:00 pm tomorrow, May 6th.

The big temperature change is illustrated by the forecast soundings for Tucson from the same forecast run: skewT plot above is valid at 04:00 pm tomorrow, while the much cooler plot below is valid at same time Monday afternoon. Much more moist by Monday with surface temperature drop of around 30 F - will be a nice change.

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