Polo’s Wild Journey: From Pacific Hurricane to Kansas Tornadoes
Hurricane Polo began its journey thousands of miles away from Kansas, forming in the Pacific Ocean off Mexico’s west coast on September 21. Fueled by warm Pacific waters, the storm rapidly intensified, reaching Category 5 strength by September 22.
Polo weakened as it moved north and eventually made landfall along Mexico’s Baja Peninsula as a Category 2 hurricane on September 29. By then, the system had begun a much different journey, sending a surge of tropical moisture northward into the central United States.
That moisture brought welcome rainfall to much of Kansas, but it also helped create the ingredients for severe weather. On September 30, the Storm Prediction Center in Norman, Oklahoma, identified central Kansas as having the potential for tornadoes. By late afternoon, tornado warnings were being issued across Pawnee and Barton counties as storm chasers reported multiple tornadoes.
The combination of abundant tropical moisture and low-level wind shear created favorable conditions for brief, often weak tornadoes stretching from near Ash Valley in Pawnee County to near Victor in Mitchell County. In all, 15 tornadoes, including several multiple-vortex tornadoes, were reported to the National Weather Service offices in Wichita and Hastings, Nebraska.
Storm chasers documented a variety of tornado shapes, including elephant trunk, stovepipe, and drill-bit tornadoes. Fortunately, many of the storms remained over open fields, limiting damage to structures.
The tornadoes were only part of Polo’s impact. The tropical system also produced torrential rainfall across parts of Kansas, with a CoCoRaHS station in Beloit recording just over 5 inches in a 24-hour period.
What started as a powerful hurricane over the Pacific continues its journey over the Kansas prairie. By the time Polo reached the state, the hurricane was gone, but its tropical moisture helped fuel a day of tornadoes and heavy rain, a striking reminder of how far a weather system can travel. Photos and article by Tanner Colvin Click to expand
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