{"id":24094,"date":"2019-06-08T00:00:51","date_gmt":"2019-06-08T08:00:51","guid":{"rendered":"http:\/\/stormbruiser.com\/chase\/?p=24094"},"modified":"2019-08-12T17:00:37","modified_gmt":"2019-08-13T01:00:37","slug":"june-8-2019-last-chance-co-supercell","status":"publish","type":"post","link":"https:\/\/stormbruiser.com\/chase\/2019\/06\/08\/june-8-2019-last-chance-co-supercell\/","title":{"rendered":"June 8, 2019 Last Chance, CO supercell"},"content":{"rendered":"

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Start: \u00a0Hot Springs, SD<\/p>\n

Lunch: \u00a0Scottsbluff\/Taco Bell and Subway<\/p>\n

End: \u00a0Burlington, CO<\/p>\n

565 miles<\/p>\n

SPC Day One\/20Z<\/a><\/p>\n

SPC Mesoscale Discussion 1026<\/a>\u00a0 \u00a0SPC Mesoscale Discussion 1027<\/a><\/p>\n

SPC Mesoscale Discussion 1028<\/a>\u00a0 \u00a0SPC Mesoscale Discussion 1030<\/a><\/p>\n

SPC Mesoscale Discussion 1032<\/a>\u00a0 \u00a0SPC Mesoscale Discussion 1034<\/a><\/p>\n

SPC Mesoscale Discussion 1035<\/a>\u00a0 \u00a0SPC Mesoscale Discussion 1036<\/a><\/p>\n

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This Saturday was the final chase day for Tour 5. \u00a0We began the day in Hot Springs, SD, and I aimed for eastern Colorado, where SPC showed a slight risk. \u00a0The slight risk extended into much of SW NE and NW KS, but tornado prospects were not high (only a 2% outline by SPC) as the dew points were not that high, and relatively high storm bases were likely. \u00a0A boundary that stretched from near Limon and into NW KS and SW NE separated southeast winds from northeast winds, and was the most likely focus area for initiation. \u00a0Upslope flow on the north side of the boundary would likely also help to get storms going from about Denver to the Cheyenne Ridge. \u00a0I figured that we needed to get down south to I-70 towards Last Chance and Limon. \u00a0Upper-level winds from the WSW and the shear required for supercells were fabulous. \u00a0I was not in love with the northeasterly surface winds just north of I-70, as tornadoes are more likely with E or SE winds. \u00a0 CAMs were fairly consistent in showing late afternoon\/early evening long-track supercells roughly along I-70, beginning near Denver. \u00a0That was convenient, as we needed to be back to Denver on Sunday.<\/p>\n

As we made our way southward through Kimball and Brush, we could see development to the southeast, near the KS\/CO line. \u00a0Soon, reports of landspout tornadoes were coming in. \u00a0(There were several landspouts, right on the aforementioned surface boundary, from about 2 to 4 p.m. MDT.) \u00a0 At Last Chance, we headed eastward on U.S. 36 towards these storms near Idalia and St. Francis. \u00a0The landspout-fest was ending now, though, and the cumulonimbus clouds to the east were looking somewhat feeble. \u00a0I was concerned that if we continued to the east, away from my primary target area between about Limon and Denver, that we would wind up on junky stuff while the real show was developing well back to our west. \u00a0So, around Anton, we turned around and headed back to the west. \u00a0(And as it turned out, the storm-of-the-day was one which drifted southeastward, south of I-70 in NW KS, in the Russell Springs area around sunset and dusk. \u00a0It had a good-sized tornado or two and fantastic structure. \u00a0The low-level jet likely helped this storm to go nuts.)<\/p>\n

We wound up observing a couple of new storms straddling I-70 near Watkins. \u00a0The base of the one just to our north quickly assumed a spaceship-like laminar look.<\/p>\n

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