Right On the Edge of Historic Heat Wave In “Ring of Fire”July 31st, 2012 at 2:42 pm by Chad Evans under Chad's WLFI Weather Blog
We are right on the edge of that tremendous Plains heat wave in the “Ring of Fire”. It is 91.8 at WLFI, but 97 at Perrysville & 96 at Veedersburg, 95 at Crawfordsville & 99 at Terre Haute. Charleston, Illinois, northwest of Terre Haute, has 100 & Decatur, Illinois just hit 100.
Meanwhile, Peru has just 84 & Rensselaer 87. Attica has 93.
It is currently 107 at Tulsa, Oklahoma, 108 at Chandler, Oklahoma & 104 at Oklahoma City. Readings in Oklahoma will tie all-time record highs today (set in 1936). Oklahoma City’s all-time record high of 113 will be in jeopardy not only today, but all week.
We had a few storms on the “Ring of Fire” this morning & a few more are likely today with just 20-25% coverage. Given us being right on the edge of the boiling heat & all the dry air near the surface & at mid-levels with the impressive instability at those mid-levels, will go for isolated severe, mainly in that watch zone area. Threat would be for an isolated microburst &/or a few large hailstones in a storm that would happen to pulse up. Dry air will keep coverage low & not over that afformentioned 20-25%.
It reminds me of Desert Southwest/High Plains instability & the high-based storms that occur in the summer. The altocumulus castellanus clouds show the high-based instability.