originally posted by: Irishhaf
a reply to: Flyingclaydisk
Scaryt thing is the decade I lived in Oklahoma the tonados started spawning further east and moved east, always wondered if the alley was shifting
cause magnetic north was.
This is true. I was out in OKC last year for a bit and spoke with locals saying they noticed a shift eastwards past years.
I confirmed it saying we’ve been seeing a rise in tornados in the Midwest by Iowa/northern Illinois etc.
Chicagoland area is primed to get hit by a monster(s) for example. Hopefully not. But there’s been an increase in touchdowns past years.
A ef-3 hit around the Naperville area right outside Chicago 2 years ago. Was narrow and intense, but it caused a large path of down trees around. I
drove through there and noticed a pattern where the tops were snapped.
There was a ef-1 a couple weeks ago in Chicago by Evanston area etc. Last time I believe it was decades ago.
All big time tornadoes spawn from supercell’s. Those are the isolated ones that have basically an engine to pump out long tracked/high intensity
tornadoes.
A couple weeks ago In Chicago they were QLCS tornadoes. Meaning they were brief touchdowns/low intensity spawning along the squall line and from bow
echoes.
Touchdowns were broad across a high populated area so the concern/alarming threat was there even though them being brief/lower intensity.
Lake Michigan and sky rises have been pointed as the savior for Chicago and this is mostly false. Lake Michigan can be both an inhibitor and an
enhancer for tornado development. As the cooler outflow from Lake Michigan extends 20miles+ inland.
The 1990 ef5 Plainfield tornado happened in late August. The cold outflow from Lake Michigan in this instance caused crazy destabilization
interacting with a high dome of very warm moist air punching through the atmosphere. I believe the jkg unit was above 8000 at time which is in the
“insane” powder keg mode.
It is the only F5/EF5 rated tornado ever officially recorded in August in the United States (unofficially the 1883 Rochester, Minnesota cyclone
is considered an F5), and the only F5 tornado to strike the Chicago area.[1][2]
en.wikipedia.org...
Repeat, it is the only ef-5 tornado to hit the United States officially in August, and it was in the Chicagoland area.
Dr Fujita (who the “f” tornado scale was named from) surveyed the damage path afterwards. Noting a 18”+ depth ground scoring trench marks in the
corn fields. Which means intense low level winds. Usually from intense sub vortices within/around the main circulation. Basically where it peels off
street asphalt and wipe structures clean off foundations.
Which basically explains how a tornado could take this house and not the neighboring house in documented instances. Or possibly explain other strange
phenomena where a vase and pictures can stay perfectly still while in other surrounding areas is completely gone etc.
The convective available potential energy (given in joules per kilogram air) is the amount of energy a parcel of air would have if lifted a
certain distance vertically through the atmosphere. Any value greater than 0 J/kg indicates instability and an increasing probability of thunderstorms
and hail.
www.meteomatics.com...
edit on 4-8-2024 by Imhere because: (no reason given)