Rainfall amounts from Monday (June 18) morning through Thursday (June 21) morning were as high as 15 to 18 inches across southern and Some of these storms produced rainfall rates as high as 5-6 inches per hour! Storm total Occurred between the early morning hours of June 19 th through mid morning on the 20 th. Meteorological forcing produced multiple rounds of widespread showers and embedded thunderstorms, especially during the overnight and morning hours between the 18 th and 21 st. The combination of this deep tropical moisture and persistent moderate to strong Record levels for the date as measured at theĬorpus Christi International Airport. The wave and upper level disturbances remained across South Texas from June 18 th through June 21 st before eventually moving southwest into Mexico and weakening late in the day on June 21 st.ĭeep tropical moisture originating from the western Caribbean and the southern Gulf of Mexico was transported across South Texas. Several surface-basedīoundaries and convergence along the coastline also aided the production of heavy rainfall. Of the atmosphere for the period from June 18 th through June 21 st across South Texas, the Rio Grande Valley, and the adjacent Gulf waters. A series of upper level disturbances interacted with this wave throughout its life cycle and helped to maintain a broad area of low pressure at all levels On June 17 th before finally arriving on June 18 th. This wave then began approaching South Texas and its adjacent coastal waters A tropical wave originating in the western Caribbean Sea moved across the Yucatan peninsula on June 15 th and 16 th, 2018.
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