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June 17th-22nd severe threat


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THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

FRANKLIN COUNTY IN SOUTH CENTRAL ILLINOIS...

HAMILTON COUNTY IN SOUTH CENTRAL ILLINOIS...

JEFFERSON COUNTY IN SOUTH CENTRAL ILLINOIS...

SOUTHERN WAYNE COUNTY IN SOUTH CENTRAL ILLINOIS...

WHITE COUNTY IN SOUTHEAST ILLINOIS...

GALLATIN COUNTY IN SOUTHERN ILLINOIS...

SALINE COUNTY IN SOUTHERN ILLINOIS...

WILLIAMSON COUNTY IN SOUTHERN ILLINOIS...

* UNTIL 500 AM CDT.

* AT 416 AM CDT...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE

THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF

80 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6

MILES NORTHEAST OF MOUNT VERNON TO MCLEANSBORO TO CREAL

SPRINGS..AND MOVING EAST AT 25 MPH.

Someone found the brake lever.

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Updated LSR

0400 AM TSTM WND DMG DU QUOIN 38.00N 89.24W

06/19/2011 PERRY IL EMERGENCY MNGR

*** 1 INJ *** ...UPDATE AT 430 AM...CAMPER BLOWN OVER

WITH 3 INDIVIDUALS TRAPPED INSIDE LOCATED AT THE DU QUOIN

STATE FAIRGROUNDS. INDIVIDUALS HAD TO BE EXTRACTED BY

FIRE/RESCUE. ONE PERSON SLIGHTLY INJURED.

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TORNADO WARNING KYC229-191315- /O.NEW.KLMK.TO.W.0095.110619T1250Z-110619T1315Z/

BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE LOUISVILLE KY 850 AM EDT SUN JUN 19 2011

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A * TORNADO WARNING FOR... WASHINGTON COUNTY IN NORTH CENTRAL KENTUCKY...

* UNTIL 915 AM EDT...

* AT 847 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.

THIS DANGEROUS STORM WAS LOCATED NEAR VALLEY HILL...MOVING EAST AT 55 MPH. *

THIS TORNADIC STORM WILL ALSO IMPACT... SPRINGFIELD... THOMPSONVILLE AND WILLISBURG... JENKINSVILLE AND MACKVILLE...

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Tuesday and Wednesday are starting to look very good for the lower GL region imo

DTX

THINGS CHANGE DRAMATICALLY TUESDAY AND TUESDAY NIGHT AS THE WARM

FRONT LIFTS INTO SOUTHERN MICHIGAN. DESPITE SBCAPE VALUES BUILDING

TO 2-3 J/G FAIRLY EARLY IN THE DAY ON TUESDAY...A HEALTHY CAP OF 100

J/KG WILL BE IN PLACE DURING THE MORNING HOURS. THIS CAP SHOULD HOLD

OFF THE BULK OF THE CONVECTION UNTIL THE AFTERNOON HOURS. MODEL

SOUNDINGS SHOW THIS CAP ERODING TUESDAY AFTERNOON/EVENING WITH

COOLING AT 800MB AS CONVERGENCE ASSOCIATED WITH THE WARM FRONT

ACTS AS A FOCUS FOR THE CONVECTION TO FIRE. LOW LEVEL SHEAR AND

THE AFOREMENTIONED SBCAPE VALUES APPEAR MORE THAN ADEQUATE FOR

SEVERE WEATHER POTENTIAL DURING THIS PERIOD...AS NOTED IN THE SPC

DAY 3 OUTLOOK PUTTING THE AREA UNDER SLIGHT RISK FOR SEVERE WEATHER.

WILL NEED TO MONITOR THIS PERIOD VERY CLOSELY FOR SEVERE WEATHER

GIVEN THE POTENTIAL FOR SUPERCELL DEVELOPMENT ACROSS THE SOUTHERN

GREAT LAKES. WITH THE NORTHWARD SHIFT IN THE WARM FRONT WILL RAISE

HIGH TEMPERATURES A BIT ON TUESDAY...WITH MUCH HIGHER POPS TUESDAY

AFTERNOON AND TUESDAY NIGHT WITH THE WARM FRONT DRAPED ACROSS THE

CWA.

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That zone from Concordia KS to Kansas City looks hot later this afternoon/evening. Really hoping we don't see anything to violent in that zone.

Coincidentally tomorrow looks good across a good bit of Central/Western Iowa. Probably a decent shot at some good tornadoes early on then probably some kind of a nice squall line screaming Eastward later on with a lot of damaging wind potentially. But the stuff on late Friday didn't quite go as planned so we'll see....

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That zone from Concordia KS to Kansas City looks hot later this afternoon/evening. Really hoping we don't see anything to violent in that zone.

Coincidentally tomorrow looks good across a good bit of Central/Western Iowa. Probably a decent shot at some good tornadoes early on then probably some kind of a nice squall line screaming Eastward later on with a lot of damaging wind potentially. But the stuff on late Friday didn't quite go as planned so we'll see....

Just starting to look at that myself. Plenty of instability and shear available tomorrow. The GFS at least is showing 0-1 km shear of up to 40 kt, so strong tornado potential. Shear vectors won't be totally parallel to the cold front/dryline, but there could be some potential to develop more quickly into a line. Interestingly, the farther east you move down the warm front the more right movers will have the propensity to travel due east or east southeast, might be something to watch.

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I could be wrong, but as of right now, I cant imagine the NE KS stuff will be surface-based. Something like yesterday... maybe a couple more tornadoes if the parameters are strong enough and the storms fire early enough before the CIN builds in later in the evening.

And plus the HRRR shows it, and the HRRR hasn't really done well this year... I'd consider that a bad sign if you're a chaser XD

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I could be wrong, but as of right now, I cant imagine the NE KS stuff will be surface-based. Something like yesterday... maybe a couple more tornadoes if the parameters are strong enough and the storms fire early enough before the CIN builds in later in the evening.

And plus the HRRR shows it, and the HRRR hasn't really done well this year... I'd consider that a bad sign if you're a chaser XD

You have to be careful with the HRRR. Like any model it is just guidance and not truth, even though it paints some pretty pictures with respect to storm scale.

June typically should be a tough month for the HRRR as forcing is weaker. However, this is an unseasonably strong trough digging into the Plains.

500H-5.gif

This should be a scenario where the HRRR is more useful (likewise for tomorrow).

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Tuesday and Wednesday are starting to look very good for the lower GL region imo

Yes definitely. IMO even if we don't get widespread severe storms, I think it's rather likely that most of us will get multiple rounds of convection between tomorrow afternoon and Wednesday evening.

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