May 21st took us to Colorado. Between upslope into the Palmer Divide, as well as an outflow boundary, most models had storms forming near Limon, before intensifying and moving east. That is pretty much what happened. A supercell formed near Deer Trail and moved east, gaining strength and becoming tornado warned. Good shear, but relatively cool surface temps kept this from being a major event, but the storm still produced softball sized hail, several funnel clouds and one brief tornado south of Anton. As it continued to move east, it encountered cold air with temps in the 50s and became an elevated hailer. Eventually near Burlington it weakened as instability waned and nocturnal cooling set up. A fun time was had by all the guests as the structure was quite nice and the funnels fairly close with the road network being sparse. Enjoy the pics!!
May 21st Southwest Iowa Tornado Outbreak
May 21st was a high potential set up in Iowa. A strong dry line, with fantastic shear, high CAPE and deep moisture would create a very dangerous environment in Iowa. By early afternoon storms exploded along the dry line and intensified as they moved east. Initial storms were not tornadic, but as the afternoon progressed, low level shear increased and tornadoes occurred with many storms! Our first tornado intercept was near Red Oak, Iowa as a supercell started spinning hard. The tornado went from a slender elephant trunk to a stovepipe and persisted for several minutes. The second tornado formed southwest of Carbon. It started as a big bowl, then vortices spun up and wrapping rain curtains were rotating violently around it. With motions of 60 mph we had to get out of its way as it approached us within a mile. The next tornado is now probably the most well-known. A strong multivortex tornado formed to our south near Corning and intensified as it moved northeast. It eventually turned into a raging F3 tornado that caused significant loss of property and life in the town of Greenfield. Our heartfelt sympathies go out to those who suffered losses there. Always the downside of significant tornadoes. Another tornado occurred to our southeast as a cell raced north towards Creston but we lost it due to storm motion and another core with huge hail causing us to have to slow down. Crazy, wild day that most will never forget.
