Sycamore, IL Weather Alerts

* WHAT...Heat index values of 105 to 110 expected.

* WHERE...Portions of central, east central, north central and
northeast Illinois.

* WHEN...Through 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses to occur.

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Portions of north central and northeast Illinois,
including the following counties, in north central Illinois, De
Kalb, Lee and Ogle. In northeast Illinois, northern Cook and
northern Kane.

* WHEN...Until 200 AM CDT.

* IMPACTS...Creeks and streams may rise out of their banks.

* ADDITIONAL DETAILS...
- At 1033 PM CDT, Doppler radar indicated heavy rain due to
thunderstorms. Between 1 and 2 inches of rain have fallen.
- Additional rainfall amounts of 1 to 2 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Chicago, Elgin, Arlington Heights, Evanston, Schaumburg,
Palatine, Skokie, Des Plaines, Mount Prospect, Hoffman
Estates, Glenview, DeKalb, Buffalo Grove, Bartlett,
Streamwood, Hanover Park, Carpentersville, Wheeling, Park
Ridge and Northbrook.
- http://www.weather.gov/safety/flood

ESFLOT

Showers and thunderstorms are expected to move across much of
northern IL this evening. Heavy rainfall rates of up to two inches
per hour will be possible with these storms as they shift east
southeastward across northern Illinois through the evening. Rainfall
amounts of this magnitude may cause instances of localized flash
flooding, along with significant rises on area streams and rivers,
some of which could
reach or exceed flood stage, especially along portions of the Rock
river.

This outlook means that elevated water levels and potential impacts
are possible, but not yet certain. Persons with interests along area
streams and rivers should closely monitor the latest forecasts.

There are currently no updates scheduled for this outlook.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
447 IN EFFECT UNTIL 1 AM CDT SUNDAY FOR THE FOLLOWING AREAS

IN ILLINOIS THIS WATCH INCLUDES 16 COUNTIES

IN CENTRAL ILLINOIS

LIVINGSTON

IN NORTH CENTRAL ILLINOIS

BOONE DE KALB LA SALLE
LEE OGLE WINNEBAGO

IN NORTHEAST ILLINOIS

COOK DUPAGE GRUNDY
KANE KANKAKEE KENDALL
LAKE IL MCHENRY WILL

IN INDIANA THIS WATCH INCLUDES 1 COUNTY

IN NORTHWEST INDIANA

LAKE IN

THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE,
BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, BYRON, CAROL STREAM,
CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DIXON, DOWNERS GROVE,
DWIGHT, ELGIN, EVANSTON, FAIRBURY, GARY, GURNEE, HAMMOND, JOLIET,
KANKAKEE, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY,
MENDOTA, MERRILLVILLE, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE,
OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, PARK FOREST,
PLANO, PONTIAC, ROCHELLE, ROCKFORD, SCHAUMBURG, STREATOR,
SYCAMORE, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK,
AND YORKVILLE.

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of north central and northeast Illinois,
including the following areas, in north central Illinois, Boone,
De Kalb, La Salle, Lee, Ogle and Winnebago. In northeast Illinois,
Central Cook, DuPage, Eastern Will, Grundy, Kane, Kendall, Lake
IL, McHenry, Northern Cook, Northern Will, Southern Cook and
Southern Will.

* WHEN...Until 1 AM CDT Sunday.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
- Thunderstorms will develop into Northern Illinois this
evening with locally heavy rainfall possible. The potential
for slow movement or training of thunderstorm cells may
produce rainfall amounts in excess of 2 inches with localized
amounts in excess of 4 inches possible.
- http://www.weather.gov/safety/flood

At 1019 PM CDT, severe thunderstorms were located along a line
extending from near Genoa to near Kingston to near Sycamore to near
Malta, moving east at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
DeKalb, Sycamore, and Cortland around 1025 PM CDT.
Maple Park around 1030 PM CDT.