Forecast update SPC RAP analysis shows a upper level convergence over the eastern half of Southeast Arizona, suppressing rain chances for the region. As result, clearer skies above. Yet, there is low pressure circulation spinning by Ajo/Yuma, producing the required divergence aloft for light to moderate rain showers. Model guidance shows the low will get knock out by the middle of the night and can produce a few showers across the area, but confidence is low. Therefore, chances for precipitation have been reduced for the night. Issued 5:58 PM MST, Thu Sep 24 https://forecast.weather.gov/product.php?site=TWC&issuedby=TWC&product=AFD&format=CI&version=1&glossary=0 #azwx #tucsonwx