Very strong 24-hour pressure rises are pushing the Front Range, and a backdoor front will push across southern New Mexico into southeastern Arizona today and tonight. Pressures have risen 20 to 25 mb behind this front as it pushed south across Colorado and into eastern New Mexico - surface plot above from NCAR RAL at 7:30 am MST. These kind of events make temperature forecasting very difficult for the nighttime hours here in Tucson. Plot below shows this morning's early WRF-GFS forecast of metro surface conditions at 4 am tomorrow morning. Temperatures are forecast to be in the upper-50s and low 60s. The east winds are not extremely strong, so it may be another morning with temperatures all over the place across Tucson area.
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