Two Cold Mornings

The last two mornings it has been cold here at the house and considerably colder right down in the Rillito Wash. Yesterday morning the low here was 38F, with the airport 10F warmer at 48F. This morning the low here was 36F, with airport at 47F. These were the first two mornings with temperatures in the 30s here at the house. We were in a situation this morning where the high elevation sites nearby were not nearly so cold. Morning lows at RAWS stations were: Mt. Graham at 49F; Rincon at 42F; Mt. Lemmon at 50F; and Mt. Hopkins at 55F. The early run of the Atmo WRF-GFS warms the low temperatures considerably tomorrow because of the intrusion of easterly surface winds - forecasted low for TUS tomorrow morning (Saturday October 27th) is only 60F. Will be one of those early mornings where there may be very large differences in temperature depending on what's the wind done after midnight. below is the model forecasted surface plot for 6 am MST tomorrow morning.

Below is a surface map from September 1938, showing the Great Hurricane of 1938 off the east coast. This is the storm to which Hurricane Sandy is being compared.