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Severe Threat Saturday 8/4/12


tornadotony

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PRELIMINARY LOCAL STORM REPORT

NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL

311 PM CDT SAT AUG 04 2012

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...

..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....

..REMARKS..

0308 PM TSTM WND GST 5 SW ROCKFORD 42.22N 89.13W

08/04/2012 M75 MPH WINNEBAGO IL TRAINED SPOTTER

RFD (which is near that report) only gusted to 56mph.

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AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE NORTHERN INDIANA

452 PM EDT SAT AUG 4 2012

.SHORT TERM... /TONIGHT THROUGH SUNDAY NIGHT/

STRONG SFC HEATING INTO LWR/MID 90S WITHIN BKN CU FIELD ACRS NRN

IN AMID LWR-MID 70S SFC DPS POOLED ALONG SFC WARM FNT BNDRY

AFFORDING MODERATELY STRONG 3500-5000 J/KG RESERVOIR FM NRN IL TO

CNTL IN/WRN OH. SLIGHTLY MODIFIED 18 UTC KILX SNDG YIELD 4400

J/KG. HIGH WETBULB ZERO GT 14KFT/DEEP WARM SUBCLOUD LYR FOR LESSER

HAIL RISK...THOUGH DOWNDRAFT INTENSITIES TO BE ENHANCED PER PRECIP

LOADING PER PWAT NEAR 2 INCHES AND HAIL MELT/SUBLIMATION WIHTIN

WARM SUBCLOUD REGN. ALSO OF NOTE IS SHALLOW/HALF KM DEEP VORTICITY/

HELICAL REGN EXTENDING SEWD FM NERN IL SFC LOW/TRIPLE PT...ALONG

WARM FNT THAT EXTNDS SEWD INTO FAR SRN CWA. INITIAL CONCERN FOR

SVR/LOW PROB TORNADIC STORMS WITHIN THIS REGN AND COVER WITH

SCATTERED SVR WORDING. PRIMARY FOCUS HOWEVER WL BE LATER THIS EVE

WITH NERN/NCNTL IL LINEAR CONVECTION. BEST SVR RISK APPEARS WEST

OF I69 CORRIDOR THROUGH THIS EVENING/ERLY TONIGHT. THEREAFTER

STORMS TO BECOME INCRSGLY ELEVATED/LESS ROOTED IN SFC. HOWEVER

SUSTENANCE OF STORMS THROUGH ENTIRE CWA ANTICIPATED PER RAMPING

SRLY LLJ TO 50 KTS NOSING INTO SERN CWA AROUND 09 UTC. TREND OF

FASTER TIMING PER RECENT TRENDS CONTD WITH DOUBT CAST ON SERN CWA

MIDDAY REGEN PER ANTICIPATED LOW STRATUS/STRATOCU CLOUD

SHIELD...THOUGH KEPT MINOR MENTION FAR SERN PER PRIOR FCST/COLLAB

WITH ERN OFFICES. OTHERWISE...DRIER/COOLER AIRMASS AS PLAINS SFC

HIGH BUILDS EWD INTO SRN GRLTLKD/MID MS VLY MON. STRONG INSOLATION

MONDAY TO OFFSET SHALLOW CAA FOR DIFFICULT MAX TEMP FCST AND

POTNL NON-DIURNAL TREND ESPCLY NRN/NWRN CWA.

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Southern part of the line moving more northeast then the rest of the complex.

File.png

... To those that mentioned the frequent lightning - no doubt about that. It's already lightning here.

Edit: This complex looks similar in structure then the one that moved through central IL and SW IN the other day.

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BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE NORTHERN INDIANA

618 PM EDT SAT AUG 4 2012

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* TORNADO WARNING FOR...

NORTHEASTERN LA PORTE COUNTY IN NORTHWEST INDIANA...

NORTHWESTERN ST. JOSEPH COUNTY IN NORTH CENTRAL INDIANA...

SOUTHERN BERRIEN COUNTY IN SOUTHWEST MICHIGAN...

* UNTIL 700 PM EDT/600 PM CDT/

* AT 515 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE SQUALL LINE CAPABLE OF PRODUCING BRIEF RAIN-WRAPPED

TORNADOES IN ADDITION TO WIDESPREAD STRAIGHT LINE WIND DAMAGE. 4

MILES EAST OF LA PORTE...AND MOVING NORTHEAST AT 35 MPH.

DESTRUCTIVE WINDS IN EXCESS OF 70 MPH IS ALSO POSSIBLE WITH THIS

SEVERE STORM.

* LOCATIONS IN THE PATH OF THIS SEVERE STORM INCLUDE...

NEW CARLISLE...

ROSELAND...BUCHANAN AND SOUTH BEND...

NILES...

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE HUDSON

LAKE...GALIEN...CHAIN-O-LAKES...LYDICK...DAYTON AND BERTRAND.

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Report from Tony-land

PRELIMINARY LOCAL STORM REPORT

NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL

529 PM CDT SAT AUG 04 2012

.TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON

.DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.

..REMARKS..

0523 PM TSTM WND DMG SCHERERVILLE 41.49N 87.45W

08/04/2012 LAKE IN TRAINED SPOTTER

INTERSECTION OF RT 30 AND BURR. AT 14 INCH DIAMETER TREE WHICH WAS 25 FEET TALL FELL ON HOUSE NEXT TO IT.

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Kinda cool image of those two lines "merging" in northern Indiana, south of SBN, right now.

EDIT: 66mph gust at SBN.

Some development just to the west of here, so at least we'll see a few drops of rain.

Looks like a nice shower passing through LAF.. Enjoy it! :lol:

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Had pretty significant winds in the cell that went through Canton, MI. I'd estimate wind gusts were about 45+ mph, and the rains were torrential, causing some minor street flooding here. Still wondering whether that bow echo will make it up here?

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Had pretty significant winds in the cell that went through Canton, MI. I'd estimate wind gusts were about 45+ mph, and the rains were torrential, causing some minor street flooding here. Still wondering whether that bow echo will make it up here?

It should after 830PM

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