Storm Updates

June 30th, 2014 at 9:09 pm by under Chad's WLFI Weather Blog

2 a.m.

Strong-severe storms have exited.

Trees & powerlines are down near Grissom & just received reported of estimated gust of 60 mph near Ladoga.

Other t’storms are popping on tail end of these, but they are not severe.

Will keep showers & t’storms in the forecast for the overnight, but as of 2 a.m., severe threat is over.  Locally-heavy rainfall is possible.

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1:30 a.m.

Grissom just gusted to 66 mph.

Severe T’Storm Warning for Montgomery & Miami.

Sporadic gusts of 45-68 mph possible in southern Montgomery County.

Bulge of wind is headed for Ladoga with gusts to 68 mph.

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STORM REPORTS:

M86 mph  Lowell

M70 mph  Morocco

Tree limbs & trees down  Northwest Newton County

M66 mph  Grissom Air Reserve Base

M64 mph  Winamac

M61 mph  Kentland

M59 mph  Fowler

M48 mph  Attica

M45 mph  Rensselaer

M44 mph  Fulton County Airport

M43 mph  White County Airport

M41 mph  WLFI-TV

M40 mph  Northeast of Frankfort

M36 mph  Purdue University Airport

M36 mph  Twin Lakes High School

M36 mph  Jasper County Airport

M36 mph  Frankfort

M31 mph  Cass County Airport

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1 a.m

Severe T’Storm Warning eastern Fulton & far northern Miami.

Sheets of rain, very little lightning & gust to 41 mph measured at WLFI.  There is more lightning being seen in the west after gust & commencement of the rain.

Tyler just reported gust of 50 mph between Attica & West Point.

Power out on Old State Route 25 between 500 & 600 in Tippecanoe County.

Carroll Junior/Senior High School weather station winds are SUSTAINED at 32 mph.

Covington wind gauge showed SUSTAINED wind at 33 mph briefly with gust to 40 mph.

Despite storm weakening trend, Champaign, Illinois Airport still gusted to 59 mph.

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12:50 a.m.

Tornadic circulation is no longer seen in Pulaski County, but gusts of 45-70 mph possible Pulaski-Fulton.

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On side note, conspicous tornado signature north of Plymouth (north of our viewing area).

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Strong winds now moving into Warren, Tippecanoe, White, Cass.

Even if you do not have a warning, if you are in Warren, Tippecanoe, White, Carroll or Cass, sporadic gusts of 40-58 mph cannot be ruled out (as the storms tend to gust out with good downdraft CAPE).

This is enough to knock down some trees limbs.

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12:35 a.m.

Storms are tending to weaken pretty rapidly over Benton, Jasper & White counties after really gusting out.  There is plenty of CAPE, but storms are dealing with CINH or capping issues with southward progression.  Pulaski still has Tornado Warning for northern part & Severe T’Storm Warning for southern part.

Fulton County now has Severe T’Storm Warning.

STORM REPORTS:

M86 mph  Lowell

M70 mph  Morocco

Tree limbs & trees down  Northwest Newton County

M61 mph  Kentland

M59 mph  Fowler

M45 mph  Rensselaer

M36 mph  Jasper County Airport

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12:23 a.m.

Pulaski County under Tornado Warning until 12:45 a.m.

Tornadic circulation with potential downburst is located near Denham.

45-65 mph wind gusts are possible in Benton County & gusts of 50-75 mph in eastern Jasper to western Pulaski County.

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12:10 a.m.

Pulaski County under Severe T’Storm Warning now.

Tornado Warning continues for northern Jasper.  Severe T’Storm Warnings continue for Newton, Jasper, Benton.

STORM REPORTS:

M86 mph  Lowell

M70 mph  Morocco

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12 a.m.

New Tornado Warning…………..now northern Jasper County.  Take shelter in Wheatfield.  Downburst & brief EF0 to low-end EF1 tornado is possible.

Damaging straight-line winds are also an issue.

All of area except Fountain, Montgomery & Boone are now under Severe T’Storm Watch.

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11:53 p.m.

Damaging winds of 60-70 mph are racing into Newton County.

Tornadic circulations/intense downburst are evident along & just north of the Kankakee River.

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11:35 p.m.

Tornado Warning for northern Newton County until 12 a.m.

Severe T’Storm Warnings continue for Newton, Jasper, Benton until 12 a.m.

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11:15 p.m.

Severe T’Storm Warning for Benton, Newton & Jasper counties until 12:30 a.m. for damaging straight-line winds of 50-80 mph.

However, occasionally, there are LEWPs & meso-vortices in the line that promote Tornado Warnings.

Main threat is wind, but I cannot rule out a brief, weak, rain-wrapped EF0 tornado that pops up quickly.

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There is an interesting signature in velocity data near Chicago Heights (west of Schererville).  It was a nice meso-vortex signature for tornado, but it looks as if it may be a very intense downburst at around 100 mph.

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Matthew had a question as to why line is turning yellow from red.  This is largely due to the torrential rain falling all around the radar dampening out the returns.  Once the rain exits the Chicago radar site, it should turn more orange/red again.

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11 p.m.

Line of storms is racing southward at 60 mph.  It will be moving into the northwestern counties around midnight.

The worst storms are located near Joliet with winds of up to 78 mph possible.  A rotation signature in LEWP is also present in this area.  Otherwise, widespread 50-70 mph are being detected.

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10:20 p.m.

There is strong evidence of some gusts in Iowa as high as 125 mph with major damage in some swaths.  Many very large trees are snapped at the base & many farms have extensive damage.  I have also seen a lot of reports of crop damage with corn completely flattened.

Midwest Map II

Here, the focus is on line of storms draped from the northwest side of Chicago, back to central Missouri.

New Severe T’Storm Watch went out for central to eastern Illinois, as well as Benton, Newton, Jasper counties until 4 a.m.

It looks as if derecho & this line of storms are in the process of linking up & becoming one line.  Didn’t look like that was going to happen two hours ago.

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9:45 p.m.

We are very unstable, but capped as of 9:45 p.m.  Tail end of derecho has been dying owing to the capping issues.  However, it is still 82 with a dew point of 77!

Line of storms in northwest Illinois is accelerating east & southeastward, so it looks like this event is really two pieces or lines of severe storms.

Cap is eroding as that line approaches central Illinois.

It is unclear what SPC will do with our watch expiring at 10 p.m.

Given up to 5500 J/kg of surface CAPE in Illinois, they may crank out a new Severe T’Storm Watch for central Illinois or part of our area until like 2 a.m. or something.

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9 p.m.

Tail end of derecho is producing winds of 50-70 mph & will pass through far northern Newton/Jasper.  Warning is in effect for northern Jasper until 10 p.m.

Nothing is growing on its tail into eastern Illinois, owing to strong CINH or capping, but it is highly unstable & primed for storms.

Second line in western Ilinois to central Missouri is BEHIND main derecho.

It is largely elevated above airmass that has stabilized, after derecho passage, but the Missouri flank & Rockford segment of it is surface-based, resulting in more severe weather in Missouri & in that Rockford segment in Illinois

Thinking that this second line will move into highly-unstable environment in Illinois & with it & part of main upper disturbance, strong CINH or capping will erode there.  It is unlikely that it will merge with the main derecho or that derecho will elongate farther southward into Illinois, given strong cap.

That secondary line will then race eastward & affect our area tonight.  This is completely based on radar trends & environment over storms & environment downstream with no model analysis.

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24 Responses to “Storm Updates”

  1. O No Moe says:

    Once again it looks like another potential storm will miss my area. We have had little in thunderstorms this year. Maybe the next one will roar through here. Night.

  2. ch n ffort says:

    I’m with u moe think its a “bust” for here. Staying with my theory of we got all the snow last winter so no severe we this season.

  3. Well you two…I am thankful they have died out before reaching my area ;) The damage in IA is horrible. Our friend’s daughter got 4 inches rain last night and now getting more! And the wind damage….do not want any of it here. I don’t mind summer but do mind the severe storms. y’all know that by now, LOL!!

    MA in REM…still watching! ;)

  4. ch n ffort says:

    Its OK with me too MA I’m already for bed don’t want to get back out to pick up trees..lol

  5. O No Moe says:

    I miss the roar of a microburst snapping small branches out of trees and CTG lightning blasting all around. It is a thrill or rush like riding a roller coaster for me. I never want anyone to be in harm’s way. What I fear is people will become complacent and ignore a true life-threatening event because of light damage reports received so far this year. Lots of warnings with little fanfare.

  6. Teri says:

    Still looks ugly!

  7. Matthew says:

    Some of the line has shifted from red to yellow. Is the cap still in place over Indiana, Chad?

  8. Matthew says:

    By the way, thank you for your excellent reporting today! I enjoy the great detail about why things are occurring.

  9. Teri says:

    Tippecanoe County now under a t’storm watch

  10. Well peeps…it is fast approaching my area, Jim and Jenna, Newton and jasper Counties. Watching TWC who are actually monitoring our area! Tor warning for NW Newton Co. two areas of red/green circulation they are watching. Lake Village is in line. May I say C-R-A-P??? I hate these things hitting at night! :-( It is still 80* with a 76* DP. Sheesh…Jim??

    So much for my “forecasting”, LOL….these were benign last time I looked (an hour or so ago),.They snuck up on me!

  11. Matthew says:

    Thank you for your quick reply to my question. Much appreciated:-)

  12. O No Moe says:

    Well I am staying up after all. At 11:00, it was 78 F at Grissom with a dewpoint of 78 F! About as high of a dewpoint we can reach in this area. Plenty of fuel available if the cap keeps eroding.

  13. I’m up as well. Dont like that projected wind speed aimed at me. Just get here and get it over with, lol

  14. O No Moe says:

    It is on your front step Mary Anne, head to your safe area.

  15. I see lightning around to the west adn north. wind may have just hit…be back soon

  16. yep…21 mph steady, 29 mph, 27….Weather Channel is really honed in on these storms! We have friends at Lowell in lake Co where they reported a gust at 86 mph! They are farmers…much crop damage expected. Last Saturday night there was a long-tracked storm system in Iroquois Co, IL that caused 440,000 ACRES of crop damage! Iro Co is just across the line from Newton.

  17. 28 and 32 mph gusts another 28 and it is raining.

  18. O No Moe says:

    The winds have picked up here. Now at a steady 13 mph out of the south east. The line of storms must still be feeding.

  19. Temp is down to 67*!! Raining kinda hard, seems to be past us. Phew!The highest gust, at rooftop level, actually about 15 ft in the air was 32 mph. Much higher at treetop level! Stay safe all, I am headed to the bunkhouse ;) My wx radio never did go off, nor did I get test/call from sheriff’s office. That upsets me!

    MA in REM

  20. O No Moe says:

    It is coming. Not very much lightning though. This will be a roar then a boom as the gust hits. These are ripping up trees and power lines.

  21. Teri says:

    Glad you are safe Mary Anne!!!!

  22. hope yours is as light as mine was. Teri!

  23. Teri says:

    Wind is picking up and just starting to rain where I am in Lafayette.

  24. Teri says:

    Very heavy rain!

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