Saturday, June 6, 2009 (Southwest IA, 380 mi.)


A blue-sky bust in Iowa while waiting for the following day's more promising setup in the same area.

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Bryan, Wes and I started off the day in Kearney, NE, leaving just before noon. After stopping for lunch in Grand Island, we continued E on I-80 to York. While stopped for gas there, Wes made the very wise decision to head S into KS and hope for isolated dryline activity, while Bryan and I followed the hoards and continued E to Lincoln, then Nebraska City. Low-level shear looked most manageable in this area near the outflow-reinforced warm front, but capping was a significant concern (as was the case throughout the warm sector). Sometime around 3pm, an SPC MCD indicated that convection was "likely" by 23-00z. With time, it appeared the best chance for breaking the cap was shifting E into the area along and E of I-29, so we crossed the Missouri and then took I-29 N to Pacific Junction, IA, in order to stay fairly close to the surface boundary (which was retreating N). Just to be sure we wouldn't be caught well upstream of anything firing farther E along the warm front, we then hedged E to Emerson, and spent the remainder of the evening meandering around that general area. When the modest Cu field still appeared limited in vertical development well into the 7:00pm hour, we bailed and headed back to Nebraska City for dinner, then got a room in Lincoln to prepare for the next day's expected chase in the same area.