Latest On Heat, Humidity Now & Storm Potential For Today-Tomorrow Morning

June 17th, 2014 at 3:24 pm by under Chad's WLFI Weather Blog

Comma head of derecho & its line damaging winds are on-going in Ontario!

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We area boiling pot on a stove with a lid today!  Winds continue to gust 35-40 mph across the viewing area.  They are sustained at 25-31 mph.

Highest measured gust so far has been 42 mph at Fowler.

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With surface CAPE as high 4500 J/kg & decent shear, the outflow boundary is continuing to be monitored.  Cap is in place, but has recently weakened a hair near it.

Again, if any isolated storm can pop through the cap on that boundary, it would do so very quickly & would go severe very quickly with large hail/downburst potential.

There is still uncertainty, as cap could re-strengthen.

Another thing to watch is storm development in northwest Illinois/northeast Iowa/southwest Wisconsin where high CAPE/good shear exists.  There, storm cluster will likely explode this evening & race east/southeast.  That area is capped, too, but shortwave will weaken cap & allow storm explosion this evening.

This should quickly evolve into a bow of damaging straight-line winds, though given the CAPE in Iowa area large hail may occur generally in the first 2-3 hours of the MCS’ evolution.  Flooding issues are possible in that area that was hit just last night-early this morning.

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Our latest Hi-Res Futurecast run shows a matured bow of storms possible at the Kankakee River at 4:19 a.m. & the line over Newton, Jasper, Pulaski, Fulton at 6 a.m.  That is as far south as this model brings the line.

However, I would be on guard along & north of U.S. 24 & have it as a note as far south as Lafayette.

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8 Responses to “Latest On Heat, Humidity Now & Storm Potential For Today-Tomorrow Morning”

  1. Teri says:

    WOW! Thank you Chad!!!

  2. Chad Alenduff says:

    Area Counties Highlighted by this MD that is being monitored for a Possible Watch with 40% likelihood one could be issued within next 1-2 Hours at this time are White, Benton, Newton, Jasper, Cass, Miami, Pulaski, and Fulton Counties

  3. Cliff says:

    Blowing like mad out here in the county!!! And not this 10-15 MPH stuff either!! More like 40?

  4. I know it has been blowing over 30+ mph in gusts which have been many. Dew point is 70* and temp is 90*. I am miserable :-( clouds have moved back in.

    MA in REM

  5. O No Moe says:

    Winds aloft must be mixing down towards the ground. Heard a couple of tree tops snaping off and falling to the ground. Those gusts are roaring, at least 40 – 50 mph at tree top level.

  6. Cathy says:

    Blowing like crazy out here too ……wow!!!!

  7. Jim says:

    Thanks Chad. Stay on guard all. Temp reached 93 in Kentland

  8. Doug in Flora says:

    Current temp here is 99.1(!); with very gusty winds…WOW! ;-P

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