{"id":2697,"date":"2025-09-19T18:17:20","date_gmt":"2025-09-19T18:17:20","guid":{"rendered":"https:\/\/discussions.weather.arizona.edu\/?p=2697"},"modified":"2025-09-19T18:17:20","modified_gmt":"2025-09-19T18:17:20","slug":"risk-of-an-isolated-thunderstorm-cell-or-two-for-tucson-and-flagstaff-this-evening-but-most-of-the-activity-is-forecast-for-cochise-county-and-further-west-into-new-mexico-september-19th-2025","status":"publish","type":"post","link":"https:\/\/discussions.weather.arizona.edu\/?p=2697","title":{"rendered":"Risk of an isolated thunderstorm cell or two for Tucson and Flagstaff this evening, but most of the activity is forecast for Cochise County and further west into New Mexico: September 19th, 2025"},"content":{"rendered":"\n

Yesterday’s Weather<\/h2>\n\n\n\n

Yesterday was a more widespread soaking for Arizona, with good totals in Tucson, Phoenix, Prescott, and Flagstaff. The Rainlog 24-hour totals are shown below for each of these locations. \u00a0<\/p>\n\n\n

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24-hour precipitation accumulations from Rainlog gauges for Tucson (top), Phoenix (middle), and Prescott and Flagstaff (bottom).<\/figcaption><\/figure>\n<\/div>\n\n\n

The GEOS-19 infrared images show convection starting in western Arizona near the Colorado River in the early afternoon. The anvil tops blowing to the east, with storm motion more north-eastward. Thunderstorms reached Phoenix and Tucson around 6pm, with a lot of lightning as shown by the annotated flashes. The cloud tops were low, shown by the absence of the deep red colors in the infrared images, reflecting the strong southwesterly jet\u00a0winds aloft blowing the tops off the cells. <\/p>\n\n\n\n