[Hoosier]

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
257 PM CDT THU AUG 23 2007

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL COOK COUNTY IN NORTHEAST ILLINOIS...
THIS INCLUDES THE CITY OF CHICAGO...

* UNTIL 415 PM CDT...

* AT 254 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS LOCATED ALONG A LINE EXTENDING FROM 25 MILES WEST OF OHARE AIRPORT TO 25 MILES WEST OF WESTERN SPRINGS...AND MOVING EAST AT 50 MPH. THESE STORMS ARE CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
OHARE AIRPORT...ROSEMONT...WILLOW SPRINGS...AND WESTERN SPRINGS BY 325 PM...
PARK RIDGE...SUMMIT...RIVERSIDE...AND RIVER FOREST BY 330 PM...
STICKNEY...AND OAK PARK BY 335 PM...
DOWNTOWN CHICAGO BY 345 PM...

[Hoosier]

0255 PM FUNNEL CLOUD 4 W GENEVA 41.88N 88.39W 08/23/2007 KANE IL TRAINED SPOTTER

ROTATING WALL CLOUD 1 MILE SOUTH OF US 38

[outflow]

storm in michigan has really tightened up its rotation now. I would assume a watch is issued shortly, for the storms moving ENE from near Chi. and also storms that may form in the state itself.

[tornadotony]

0302 PM FUNNEL CLOUD SUGAR GROVE 41.77N 88.46W
08/23/2007 KANE IL LAW ENFORCEMENT

AT INTERSTATE 88 AT SUGAR GROVE

[outflow]

0345 PM FUNNEL CLOUD 2 W EDMORE 43.41N 85.08W
08/23/2007 MONTCALM MI TRAINED SPOTTER

SOME ROTATION WAS NOTED AROUND THE SIX LAKES AREA WEST OF
EDMORE.

[Hoosier]

0305 PM FUNNEL CLOUD WEST CHICAGO 41.89N 88.22W 08/23/2007 DUPAGE IL TRAINED SPOTTER
ROTATING WALL CLOUD

[tornadotony]

I would watch that cell merger in SW Will County. That individual cell's vorticity may be enhanced by the interaction with the line, and it could lead to a possible tornado.

[tornadotony]

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
311 PM CDT THU AUG 23 2007

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0310 PM FUNNEL CLOUD ST. CHARLES 41.92N 88.30W
08/23/2007 KANE IL EMERGENCY MNGR

ROTATING WALL CLOUD IL RTE 64 AND TAYLOR

[tornadotony]

TOR probably warranted for Du Page County.

 082307radar3.PNG (173.69K)
Number of downloads: 1

[MidwestChaser]

Out to the west of me it's INCREDIBLY nasty looking here in Dupage county.


THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING
SITUATION. THIS STORM HAS THE POTENTIAL TO PRODUCE TORNADO LIKE
WINDS! FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO
CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

[tornadotony]

TORNADO WARNING FOR...
CENTRAL COOK COUNTY IN NORTHEAST ILLINOIS...
DUPAGE COUNTY IN NORTHEAST ILLINOIS...

* UNTIL 400 PM CDT...

* AT 309 PM...NATIONAL WEATHER SERVICE RADAR INDICATED STRONG
ROTATION IN A SEVERE THUNDERSTORM NEAR WINFIELD...MOVING EAST AT 50
MPH.

* THE TORNADO WILL BE NEAR...
ELMHURST...VILLA PARK...HILLSIDE...AND BENSENVILLE BY 320 PM...
NORTHLAKE...STONE PARK...MELROSE PARK...AND FRANKLIN PARK BY 325
PM...
HARWOOD HEIGHTS...AND OAK PARK BY 330 PM...

[outflow]

tony, can you look at the michigan storm with GRL3 for me. Looks impressive on the local news station radar.

[tornadotony]

Hook.

 082307radar4.PNG (165.67K)
Number of downloads: 4

[tornadotony]

outflow, on Aug 23 2007, 03:19 PM, said:

tony, can you look at the michigan storm with GRL3 for me. Looks impressive on the local news station radar.

Which site?

[tornadotony]

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR NORTHERN
DUPAGE AND NORTHERN COOK COUNTIES...

* AT 312 PM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO
INDICATE A TORNADO NEAR WHEATON...AND MOVING EAST NORTHEAST AT 45
MPH.

THE TORNADO WILL BE NEAR...
THIS STORM WILL CROSS INTERSTATE 294 NEAR ELMHURST...JUST NORTH OF
THE EISENHOWER EXPRESSWAY BY 325 PM CDT

[outflow]

tornadotony, on Aug 23 2007, 04:21 PM, said:

Which site?

Which radar site? GRR or DTX almost directly between the radar sites.

[Sam Sagnella]

Wow, very impressive BWER on the leading edge of that line just NE of Wheaton in the GR3 image Tony posted above. This is obviously a dangerous storm regardless, but in such a populated area, there could be significant damage from this cell both from the likely tornado, and from pot'l for hurricane force straight-line winds.

[Hoosier]

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
323 PM CDT THU AUG 23 2007

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
SOUTHERN COOK COUNTY IN NORTHEAST ILLINOIS...
WILL COUNTY IN NORTHEAST ILLINOIS...

* UNTIL 400 PM CDT...

* AT 319 PM...A TRAINED SPOTTER REPORTED A TORNADO JUST IN BOLINGBROOK... AND AND RADAR INDICATED ROTATION NEAR MOKENA...MOVING EAST AT 50 MPH.

* THE TORNADO WILL BE NEAR... COUNTRY CLUB HILLS...HAZEL CREST...FLOSSMOOR...AND MARKHAM BY 330 PM... THORNTON...HOMEWOOD...SOUTH HOLLAND...AND GLENWOOD BY 335 PM... LANSING...AND CALUMET CITY BY 340 PM...

[snow-squall]

How far do you think this line will make it. I'm in SW Ontario, close to Detroit. I'm thinking it will make it here in full force?

[Sam Sagnella]

Tornado reported on the ground by spotters in Bolingbrook. If this in fact the case, and I have absolutely no reason to suspect it is not, then this is their second tornado this month. An EF1 touched down on the 11th(?), I'm gonna dig up the PNS now.