I don’t know what is more thrilling, when you intercept a tornado – or when one of your long-time friends and past tour guest intercepts a tornado. The latter happened today when I received a text message from Nicole saying there was a wicked storm in the Denver area and she was going to head out an “see what she could see”.

Overnight (June 7th, 2009) a rare atmospheric phenomenon occurred in south-central Oklahoma. No it wasn’t a tornado, it was much more rare than that – even during 2009! Suddenly at about 3am CDT in Jefferson County the air temperature became very hot and dry, the temperature shot up to 97 degrees F, literally within minutes. The event that happened is called a Convective Heat Burst, it happens when a parcel of very cold and unsaturated air within a dying storm descends very rapidly and warms due to compression (at a rate of 9.8C per 1,000 meters) and overshoots its equilibrium level and reaches the surface.

22:02Z 3D radar image from KCYS Cheyenne, WY Radar. Notice the yellow lines (precip) wrapping around the updraft. The image below was taken 8 minutes after this radar scan. The tornado was on the ground for over 20 minutes.

Spring-like weather has returned to the Central Plains, but it’s June – not May!