There was still some lightning in southern Arizona yesterday near the New Mexico border (CG flash locations through 2 am MST 18 July above). The morning sprinkles and showers yesterday wet the pavement in places and 2 ALERT stations measured small amounts of rain.
The dewpoint has climbed steadily during the night at Yuma (time series of T, Td, and RH below) and is more than 30F higher than it was yesterday afternoon. The NWS Doppler radar at Yuma indicates in latest VAD that the layer with the high dewpoints is very shallow.
The early run of the WRF-NAM at Atmo today forecasts a continuing return of higher PW air into Arizona and southern California - above forecast of PW on the 5.4 km grid is valid at 8 am MST tomorrow morning. The model also forecasts some early morning storms over southwest Arizona - forecast below of composite radar echoes is also valid at 8 am. The model forecasts storms over parts of central and eastern Pima County on both Saturday and Sunday afternoons. So it appears that we are not in for an extended dry-out.
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