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July 11-14 Severe Weather Event


Powerball

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I was only speaking of TOR threat mentioned by LOT. It's game on for high end damaging winds for region.

That shear is great for tornadoes, it might be best to dial back the commentary when you are unsure of what you are talking about.

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Ahh okay. yeah 0-1KM shear right now is pathetic.But its not entirely a deal breaker.

 

0-1 km shear is probably a bit stronger than indicated via mesoanalysis especially in E IL where there is some backing via observations.

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WWUS20 KWNS 132059

SEL3

SPC WW 132059

IAZ000-ILZ000-INZ000-LMZ000-140400-

URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 413

NWS STORM PREDICTION CENTER NORMAN OK

400 PM CDT MON JUL 13 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF

EASTERN IOWA

NORTHERN AND CENTRAL ILLINOIS

NORTHWEST INDIANA

LAKE MICHIGAN

* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

1100 PM CDT.

* PRIMARY THREATS INCLUDE...

A COUPLE TORNADOES POSSIBLE

WIDESPREAD DAMAGING WIND GUSTS TO 70 MPH LIKELY

SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 3

INCHES IN DIAMETER POSSIBLE

SUMMARY...SEVERE THUNDERSTORMS SHOULD GRADUALLY INCREASE THROUGH

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 110 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES WEST NORTHWEST OF

ROCKFORD ILLINOIS TO 30 MILES SOUTH SOUTHWEST OF BLOOMINGTON

ILLINOIS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 410...WW 411...WW 412...

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 30030.

...GUYER

--

NWS Watches Provided by AllisonHouse.com

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The cap looks like it's starting to go now with a few cells from east of Cedar Rapids to near Joliet. We are probably going to go northeast and hope that the wind shift that appears to have shifted just east of here is enough to focus storm initiation in far east central IL within an hour or so.

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KARX...

 

LATEST RADAR IMAGERY SHOWS ISOLATED THUNDERSTORMS DEVELOPING ACROSS
THE FOREST AREA. CAPE AND SHEAR PROFILES SUPPORT SUPERCELLS WITH 0-6
KM BULK SHEAR VALUES OF 40 TO 45 KTS. SURFACE BASED CAPE VALUES ARE
ALSO VERY SUPPORTIVE OF SUPRECELLS WITH VALUES RANGING FROM 3000-
4000 J/KG. WE SHOULD SEE THESE ISOLATED TO SCATTERED STORMS
PERSIST THROUGH EARLY THIS EVENING AND EXIT INTO SOUTHERN
WISCONSIN/NORTHERN ILLINOIS. 0-1 KM BULK SHEAR VALUES ARE VERY
WEAK...10 KTS OR LESS...SO NOT EXPECTING TORNADOES. HOWEVER IF WE
CAN ESTABLISH A STRONG ENOUGH SUPERCELL CANNOT RULE OUT A BRIEF
TORNADO OR TWO

 

 

 

JUST a constant rumble here right now.

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0-1 km shear is probably a bit stronger than indicated via mesoanalysis especially in E IL where there is some backing via observations.

VWP data from KLOT, KDVN, TORD, and KILX show about 10-20kts of 0-1KM SHR... so yeah, mesoanalysis is wrong with its values attm.

EDIT: Also only 40/20 probs on the TOR watch.

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The cap looks like it's starting to go now with a few cells from east of Cedar Rapids to near Joliet. We are probably going to go northeast and hope that the wind shift that appears to have shifted just east of here is enough to focus storm initiation in far east central IL within an hour or so.

In between Danville and Champaign?

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