The intense rainfall rates and impressive rain totals led to significant flash flooding that affected much of Highway 87 between Tahoka and Lamesa as well as Highway 380 from Tahoka to east of Post.įlooded out vehicles on Highway 87 between Tahoka and O'Donnell around midday Thursday (1 June 2023). The area of heaviest thunderstorms eventually shifted northeastward late morning and early afternoon, dropping widespread 3 to 4+ inch totals from Tahoka to Post. Measured 24 -hour rainfall from the West Texas Mesonet (WTM) ending at 6:15 pm on 1 June can be found at: South Plains View and Close up of the southern South Plains. A zoomed out view of the South Plains region can be FOUND HERE. The below radar-estimated rainfall graphic indicates that O'Donnell, located just south of the bend in the road between Tahoka and Lamesa, felt the brunt of the heaviest rainfall.Ģ4-hour radar-estimated and bias-corrected rainfall ending at 7 am on Friday (2 June 2023). Before all was said and done, the O'Donnell WTM measured an incredible 7.02", much of which fell in the 2 hour window mid-late morning. The torrential rainfall rates continued for nearly two hours, from around 9:30 am to 11:30 am, before finally diminishing, then ending completely by early afternoon. Torrential rainfall and flooding along Highway 87 just south of Tahoka Thursday morning (1 June 2023). An instantaneous rain rate of 7.2 inches/hour was briefly measured at the O'Donnell West Texas Mesonet site located on the southwest edge of town, with persistent 1-minute totals of 0.05 to 0.10 inches. However, that quickly changed as more widespread and intense thunderstorms became anchored over the south-central South Plains, including a good chunk of Lynn County. Initially, the showers and thunderstorms that formed across the central and southern South Plains early Thursday morning were on the scattered side, bringing brief bursts of moderate to heavy rain. Additional radar animations can be viewed at: 1:10 am to 5:27 am Thursday morning and 10:54 am to 5:59 pm on Thursday. Lubbock WSR-88D radar animation valid from 6:07 am to 10:15 am on Thursday (1 June 2023). One of the primary factors, in addition to the plentiful humidity, was a low-level boundary, originating from thunderstorm activity that affected the Texas Panhandle the previous evening into the overnight hours, that provided a focus for shower and thunderstorm development. Rich moisture, a weak upper level disturbance and several low-level boundaries worked in concert to bring torrential rainfall to portions of the south-central and southeastern South Plains on the first day of June (Thursday morning and early afternoon). Widespread flooding on Highway 87 north of O'Donnell on Thursday (1 June 2023). Torrential rain leads to flash flooding around O'Donnell & Post
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