Weather Alerts for Grundy County

Issued by the National Weather Service

River Flood Watch  RIVER FLOOD WATCH   River Flood Watch
GRUNDY COUNTY

Areas Affected:
Grundy
Effective: Tue, 2/20 11:45pm Updated: Sun, 2/18 9:55pm Urgency: Future
Expires: Sat, 2/24 9:36pm Severity:  Moderate  Certainty: Possible

 
Details:
...The National Weather Service in Chicago has issued a Flood Watch
for the following rivers in Illinois...
Illinois River at Morris affecting Grundy County
Illinois River at Ottawa affecting La Salle County
Illinois River at La Salle affecting Bureau...La Salle and Putnam
Counties
.Widespread rainfall of one to two inches is likely with the
potential for two to four inches of rain Monday through Tuesday
night. Rainfall of this magnitude would likely result in flooding
on the portions of the Upper Illinois River.
The National Weather Service in Chicago has issued a
* Flood Watch for
The Illinois River at Morris
* from Tuesday evening to Saturday evening.
* At  8:45 PM Sunday the stage was 6.4 feet.
* Moderate flooding is possible.
* Flood stage is 16.0 feet.
* Forecast...Flood stage may be reached by Tuesday evening.
* Impact...At 16.0 feet...Pine Bluff Road, west of Route 47, and
Dwight Roads flood on south side of river.
&&

Flood Watch  FLOOD WATCH   Flood Watch
GRUNDY COUNTY

Areas Affected:
Grundy - Kendall
Effective: Wed, 2/21 12:00am Updated: Sun, 2/18 9:55pm Urgency: Future
Expires: Mon, 2/19 9:40am Severity:  Moderate  Certainty: Possible

 
Details:
...FLOOD WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE
TUESDAY NIGHT...
The Flood Watch continues for
* Much of northern Illinois and extreme northwest Indiana.
* From Monday evening through late Tuesday night.
* Unseasonably warm and moist air will overspread the region over
the next few days with several rounds of showers and
thunderstorms expected between early Monday morning and
Wednesday. Expect area wide rainfall totals of over an inch with
many areas potentially receiving 2 to 4 inches.
* Grounds remain frozen, therefore much of the rain will result in
rapid runoff. In addition, many areas north of I-80 have snow on
the ground still and melting of this snow will compound runoff
from heavy rainfall. Ice jam break up is also a concern. Expect
rises on area rivers and streams that may result in flooding.

Information:
A Flood Watch means there is a potential for flooding based on
current forecasts.
You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

Hydrologic Outlook  HYDROLOGIC OUTLOOK   Hydrologic Outlook
GRUNDY COUNTY

Areas Affected:
Bureau - Grundy - Putnam
Effective: Mon, 2/19 6:00pm Updated: Sun, 2/18 9:55pm Urgency: Future
Expires: Sun, 2/18 11:20pm Severity: Unknown Certainty: Possible

 
Details:
This hydrologic outlook includes the following rivers: Illinois
River.
For the Upper Illinois River...including Morris...Ottawa...La
Salle...Minor flooding is possible.
For the Illinois River at Morris, the latest stage is 6.5 feet at 11
AM Sunday. Flood stage is 16.0 feet. Bankfull stage is 13.0 feet.
Water levels are expected to remain below flood stage.
For the Illinois River at Ottawa, the latest stage is 460.1 feet at
10 AM Sunday. Flood stage is 463.0 feet. Bankfull stage is 461.0
feet.Minor flooding is possible...with a crest of around 463.3 feet
Wednesday evening...which is 0.3 feet above flood stage.
For the Illinois River at La Salle, the latest stage is 14.3 feet at
11 AM Sunday. Flood stage is 20.0 feet. Bankfull stage is 17.5 feet.
Minor flooding is possible...with a crest of around 22.8 feet
Thursday morning...which is 2.8 feet above flood stage.