The main affecting systems include landfall typhoon, low-level jet stream and west trough.

主要影响系统为登陆台风、西风低槽和低空急流。

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The article presents that the supergeostrophic wind of subsynoptic scale low-level jet stream is mainly caused by the isallobaric wind superimposing on the geostrophic wind field.

本文指出次天气尺度低空急流的超地转特征主要是由变压风叠加在地转风场上所致。

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The cold and warm currents meet at the southern side of the shear line and the left side of the low-level jet stream to produce an upward movement of intensive convergence and trigger the rainstorm.

冷暖气流在切变线南侧、低空急流左侧交汇，产生强烈辐合上升运动，触发了强降水。

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The Oklahoma City area, including Moore, could continue to face storms during the morning due to a strong cold front positioned through the state and a strong low-level jet stream "plowing into it from the south, " Van Dillen said.

CNN: Bracing for Round 3: 53 million under severe weather threat