Alert archive / Illinois / River Flood Warnings in 2021
River Flood Warning 12, NWS Chicago, IL
NWS Chicago, IL issued this river flood warning at Jun 26, 2021, 10:14 PM CDT for LaSalle County, Illinois. It took effect at Jun 27, 2021, 11:45 AM CDT. It was in force for 5 days.
The area
The outline as issued.
The facts
- Issued
- Jun 26, 2021, 10:14 PM CDT (03:14 UTC)
- In effect from
- Jun 27, 2021, 11:45 AM CDT
- Expired
- Jul 2, 2021, 5:14 AM CDT
- In force
- 5 days
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- Minor
County LaSalle County, IL
The radar
The Chicago radar (KLOT), 75 km from the middle of the area, began a volume at 03:16 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The river
Written for the forecast point Illinois River at Ottawa (OTWI2).
- Action stage
- 461 ft
- Minor stage
- 463 ft
- Moderate stage
- 467 ft
- Major stage
- 471 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The text
As transmitted.
174 WGUS43 KLOT 270314 FLWLOT BULLETIN - IMMEDIATE BROADCAST REQUESTED Flood Warning National Weather Service Chicago IL 1014 PM CDT Sat Jun 26 2021 ...The National Weather Service in Chicago IL has issued a Flood Warning for the following rivers in Illinois... Illinois River at Ottawa affecting La Salle County. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/Chicago and water.weather.gov The next statement is expected by Sunday afternoon. && ILC099-271815- /O.NEW.KLOT.FL.W.0012.210627T1800Z-210629T0800Z/ /OTWI2.1.ER.210627T1800Z.210628T1200Z.210629T0448Z.NO/ 1014 PM CDT Sat Jun 26 2021 The National Weather Service in Chicago has issued a * Flood Warning for the Illinois River at Ottawa. * From Sunday afternoon to late Monday night. * At 9:30 PM CDT Saturday the stage was 461.2 feet. * Flood stage is 463.0 feet. * Minor flooding is forecast. * Forecast...The river is expected to rise above flood stage early tomorrow afternoon to a crest of 463.9 feet Monday morning. It will then fall below flood stage late Monday evening. * Impact...At 464.0 feet, Backwater causes the Fox River to reach bankfull near St. Elizabeth Medical Center in Ottawa. && LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899 $$ Ogorek
13 follow-up statements
601
WGUS83 KLOT 271642
FLSLOT
Flood Statement
National Weather Service Chicago IL
1142 AM CDT Sun Jun 27 2021
...The Flood Warning is extended for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Morris affecting La Salle and Grundy Counties.
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Watch means water levels above flood stage are possible, but
not yet certain, based upon the latest forecasts. Persons along
rivers and streams in the watch area should monitor the latest
forecasts and be prepared to take action should flooding develop.
A Flood Advisory means water levels near flood stage are imminent or
may already be occurring. Water may overtop low stream banks in some
areas. Persons in the advisory area should use caution and avoid
flood waters.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected around 245 AM CDT late tonight.
&&
ILC011-099-155-280745-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-210702T0200Z/
/LSLI2.1.ER.210627T1049Z.210629T0000Z.210701T2000Z.NO/
1142 AM CDT Sun Jun 27 2021
...The Flood Warning is now in effect until late Thursday evening...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Thursday evening.
* At 10:45 AM CDT Sunday the stage was 20.9 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Sunday was 20.9 feet.
* Forecast...The river is expected to rise to a crest of 23.7 feet
tomorrow evening. It will then fall below flood stage Thursday
afternoon.
* Impact...At 22.0 feet, Lower parking lot at Starved Rock State
Park is inundated east of La Salle.
* Flood History...This crest compares to a previous crest of 23.7
feet on 01/13/2020.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC063-099-280745-
/O.EXT.KLOT.FL.W.0011.000000T0000Z-210629T0430Z/
/MORI2.1.ER.210628T0000Z.210628T1200Z.210628T2230Z.NO/
1142 AM CDT Sun Jun 27 2021
...The Flood Warning is now in effect until late tomorrow evening...
The Flood Warning continues for
the Illinois River at Morris.
* Until Monday evening.
* At 9:45 AM CDT Sunday the stage was 14.9 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage this
evening to a crest of 16.5 feet tomorrow morning. It will then
fall below flood stage tomorrow afternoon.
* Impact...At 16.0 feet, Pine Bluff Road, west of Route 47, and
Dwight Roads flood on south side of river.
* Flood History...This crest compares to a previous crest of 15.9
feet on 03/21/1984.
&&
LAT...LON 4137 8879 4134 8860 4144 8822 4137 8820
4126 8867 4130 8879
$$
ILC099-280745-
/O.EXT.KLOT.FL.W.0012.210627T1645Z-210629T1800Z/
/OTWI2.1.ER.210627T1645Z.210628T1800Z.210629T1200Z.NO/
1142 AM CDT Sun Jun 27 2021
...The Flood Warning is now in effect until early Tuesday
afternoon...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Tuesday afternoon.
* At 10:30 AM CDT Sunday the stage was 462.9 feet.
* Flood stage is 463.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late
this morning to a crest of 464.0 feet early tomorrow afternoon. It
will then fall below flood stage Tuesday morning.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
* Flood History...This crest compares to a previous crest of 463.8
feet on 03/01/2007.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
Birk315
WGUS83 KLOT 280217
FLSLOT
Flood Statement
National Weather Service Chicago IL
917 PM CDT Sun Jun 27 2021
...The Flood Warning continues for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
Illinois River at Morris affecting La Salle and Grundy Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected around 1230 PM CDT Monday afternoon.
&&
ILC011-099-155-281730-
/O.CON.KLOT.FL.W.0013.000000T0000Z-210702T0200Z/
/LSLI2.1.ER.210627T1049Z.210629T0000Z.210701T2000Z.NO/
917 PM CDT Sun Jun 27 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Thursday evening.
* At 8:45 PM CDT Sunday the stage was 22.1 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 8:45 PM CDT Sunday was 22.1 feet.
* Forecast...The river is expected to rise to a crest of 23.7 feet
tomorrow evening. It will then fall below flood stage Thursday
afternoon.
* Impact...At 22.0 feet, Lower parking lot at Starved Rock State
Park is inundated east of La Salle.
* Flood History...This crest compares to a previous crest of 23.7
feet on 01/13/2020.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-281730-
/O.CON.KLOT.FL.W.0012.000000T0000Z-210629T1800Z/
/OTWI2.1.ER.210627T1650Z.210628T1800Z.210629T1200Z.NO/
917 PM CDT Sun Jun 27 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Tuesday afternoon.
* At 8:30 PM CDT Sunday the stage was 463.3 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 8:30 PM CDT Sunday was 463.3 feet.
* Forecast...The river is expected to rise to a crest of 464.0 feet
early tomorrow afternoon. It will then fall below flood stage
Tuesday morning.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
* Flood History...This crest compares to a previous crest of 463.8
feet on 03/01/2007.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
ILC063-099-281730-
/O.CON.KLOT.FL.W.0011.000000T0000Z-210629T0430Z/
/MORI2.1.ER.210628T0349Z.210628T1200Z.210628T2230Z.NO/
917 PM CDT Sun Jun 27 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Illinois River at Morris.
* Until Monday evening.
* At 8:45 PM CDT Sunday the stage was 15.6 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late
this evening to a crest of 16.5 feet tomorrow morning. It will
then fall below flood stage tomorrow afternoon.
* Impact...At 16.0 feet, Pine Bluff Road, west of Route 47, and
Dwight Roads flood on south side of river.
* Flood History...This crest compares to a previous crest of 15.9
feet on 03/21/1984.
&&
LAT...LON 4137 8879 4134 8860 4144 8822 4137 8820
4126 8867 4130 8879
$$
Lenning572
WGUS83 KLOT 281628
FLSLOT
Flood Statement
National Weather Service Chicago IL
1128 AM CDT Mon Jun 28 2021
...The Flood Warning is extended for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
...The Flood Warning is cancelled for the following rivers in
Illinois...
Illinois River at Morris affecting La Salle and Grundy Counties.
...The Flood Warning continues for the following rivers in
Illinois...
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected around 1230 PM CDT this afternoon.
&&
ILC063-099-281730-
/O.CAN.KLOT.FL.W.0011.000000T0000Z-210628T1628Z/
/MORI2.1.ER.210628T0349Z.210628T1200Z.210628T2230Z.NO/
1128 AM CDT Mon Jun 28 2021
...The Flood Warning for the Illinois River at Morris has been
cancelled...
The Flood Warning is cancelled for
the Illinois River at Morris.
* At 10:45 AM CDT Monday the stage was 15.8 feet.
* Flood stage is 16.0 feet.
* Forecast...The river is expected to fall to 7.9 feet Monday
morning.
&&
LAT...LON 4137 8879 4134 8860 4144 8822 4137 8820
4126 8867 4130 8879
$$
ILC011-099-155-290730-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-210703T1600Z/
/LSLI2.1.ER.210627T1049Z.210629T0600Z.210703T1000Z.NO/
1128 AM CDT Mon Jun 28 2021
...The Flood Warning is now in effect until late Saturday morning...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Saturday morning.
* At 10:45 AM CDT Monday the stage was 23.2 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Monday was 23.2 feet.
* Forecast...The river is expected to rise to a crest of 23.6 feet
just after midnight tonight. It will then fall below flood stage
early Saturday morning.
* Impact...At 22.0 feet, Lower parking lot at Starved Rock State
Park is inundated east of La Salle.
* Flood History...This crest compares to a previous crest of 23.7
feet on 01/13/2020.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-290730-
/O.EXT.KLOT.FL.W.0012.000000T0000Z-210629T1200Z/
/OTWI2.1.ER.210627T1650Z.210628T1130Z.210629T0600Z.NO/
1128 AM CDT Mon Jun 28 2021
...The Flood Warning is now in effect until tomorrow morning...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Tuesday morning.
* At 10:30 AM CDT Monday the stage was 463.5 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:30 AM CDT Monday was 463.6 feet.
* Forecast...The river is expected to rise to a crest of 463.5 feet
this afternoon. It will then fall below flood stage just after
midnight tonight.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
* Flood History...This crest compares to a previous crest of 463.5
feet on 02/10/2008.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
Birk707
WGUS83 KLOT 281633
FLSLOT
Flood Statement
National Weather Service Chicago IL
1133 AM CDT Mon Jun 28 2021
...The Flood Warning continues for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected around 230 AM CDT late tonight.
&&
ILC011-099-155-290745-
/O.CON.KLOT.FL.W.0013.000000T0000Z-210703T1600Z/
/LSLI2.1.ER.210627T1049Z.210629T0600Z.210703T1000Z.NO/
1133 AM CDT Mon Jun 28 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Saturday morning.
* At 10:45 AM CDT Monday the stage was 23.2 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Monday was 23.2 feet.
* Forecast...The river is expected to rise to a crest of 23.6 feet
just after midnight tonight. It will then fall below flood stage
early Saturday morning.
* Impact...At 22.0 feet, Lower parking lot at Starved Rock State
Park is inundated east of La Salle.
* Flood History...This crest compares to a previous crest of 23.7
feet on 01/13/2020.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-290745-
/O.CON.KLOT.FL.W.0012.000000T0000Z-210629T1200Z/
/OTWI2.1.ER.210627T1650Z.210628T1130Z.210629T0600Z.NO/
1133 AM CDT Mon Jun 28 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Tuesday morning.
* At 10:30 AM CDT Monday the stage was 463.5 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:30 AM CDT Monday was 463.6 feet.
* Forecast...The river is expected to rise to a crest of 463.5 feet
this afternoon. It will then fall below flood stage just after
midnight tonight.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
* Flood History...This crest compares to a previous crest of 463.5
feet on 02/10/2008.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
Birk952
WGUS83 KLOT 290257
FLSLOT
Flood Statement
National Weather Service Chicago IL
957 PM CDT Mon Jun 28 2021
...The Flood Warning is extended for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
Vermilion River at Pontiac affecting Livingston County.
...The Flood Warning continues for the following rivers in
Illinois...
Vermilion River near Leonore affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected around 100 PM CDT Tuesday afternoon.
&&
ILC011-099-155-291800-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-210703T2000Z/
/LSLI2.1.ER.210627T1049Z.210629T0600Z.210703T1400Z.NO/
957 PM CDT Mon Jun 28 2021
...The Flood Warning is now in effect until Saturday afternoon...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Saturday afternoon.
* At 8:45 PM CDT Monday the stage was 23.8 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 8:45 PM CDT Monday was 23.8 feet.
* Forecast...The river is expected to rise to a crest of 23.9 feet
just after midnight tonight. It will then fall below flood stage
late Saturday morning.
* Impact...At 22.0 feet, Lower parking lot at Starved Rock State
Park is inundated east of La Salle.
* Flood History...This crest compares to a previous crest of 23.9
feet on 06/02/2004.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-291800-
/O.EXT.KLOT.FL.W.0012.000000T0000Z-210630T0200Z/
/OTWI2.1.ER.210627T1650Z.210629T0130Z.210629T2000Z.NO/
957 PM CDT Mon Jun 28 2021
...The Flood Warning is now in effect until late tomorrow evening...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Tuesday evening.
* At 8:30 PM CDT Monday the stage was 463.6 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 8:30 PM CDT Monday was 463.6 feet.
* Forecast...The river is expected to fall below flood stage
tomorrow afternoon and continue falling to 459.4 feet Monday
evening.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
* Flood History...This crest compares to a previous crest of 463.5
feet on 02/10/2008.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
ILC099-291800-
/O.EXT.KLOT.FL.W.0010.000000T0000Z-210630T0000Z/
/LNRI2.1.ER.210628T1035Z.210628T2330Z.210629T1800Z.NO/
957 PM CDT Mon Jun 28 2021
...The Flood Warning is now in effect until tomorrow evening...
The Flood Warning continues for
the Vermilion River near Leonore.
* Until Tuesday evening.
* At 8:45 PM CDT Monday the stage was 16.3 feet.
* Flood stage is 16.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 8:45 PM CDT Monday was 16.4 feet.
* Forecast...The river is expected to fall below flood stage early
tomorrow afternoon and continue falling to 7.6 feet Monday evening.
* Impact...At 16.0 feet, Water begins to flood low lying
agricultural land near river.
* Flood History...This crest compares to a previous crest of 16.4
feet on 09/08/1989.
&&
LAT...LON 4131 8912 4132 8899 4113 8880 4109 8889
$$
ILC105-291800-
/O.EXT.KLOT.FL.W.0006.000000T0000Z-210630T0112Z/
/PNTI2.2.ER.210627T0430Z.210628T0730Z.210629T1912Z.NO/
957 PM CDT Mon Jun 28 2021
...The Flood Warning is now in effect until tomorrow evening...
The Flood Warning continues for
the Vermilion River at Pontiac.
* Until Tuesday evening.
* At 8:45 PM CDT Monday the stage was 15.5 feet.
* Flood stage is 14.0 feet.
* Moderate flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 8:45 PM CDT Monday was 15.7 feet.
* Forecast...The river is expected to fall below flood stage early
tomorrow afternoon and continue falling to 5.0 feet Monday evening.
* Impact...At 15.0 feet, Low-lying residences threatened between
Mill Street and Chautauqua Park in Pontiac. IL-116 threatened east
and west of Pontiac.
* Flood History...This crest compares to a previous crest of 15.5
feet on 04/24/1944.
&&
LAT...LON 4109 8889 4113 8880 4084 8852 4079 8861
$$
Lenning761
WGUS83 KLOT 291541
FLSLOT
Flood Statement
National Weather Service Chicago IL
1041 AM CDT Tue Jun 29 2021
...The Flood Warning is extended for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected around 145 AM CDT late tonight.
&&
ILC011-099-155-300645-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-210704T0300Z/
/LSLI2.1.ER.210627T1049Z.210629T1800Z.210703T2100Z.NO/
1041 AM CDT Tue Jun 29 2021
...The Flood Warning is now in effect until late Saturday evening...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Saturday evening.
* At 9:45 AM CDT Tuesday the stage was 24.3 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 9:45 AM CDT Tuesday was 24.3 feet.
* Forecast...The river is expected to rise to a crest of 24.3 feet
this afternoon. It will then fall below flood stage Saturday
afternoon.
* Flood History...This crest compares to a previous crest of 24.1
feet on 06/29/1869.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-300645-
/O.EXT.KLOT.FL.W.0012.000000T0000Z-210630T1800Z/
/OTWI2.1.ER.210627T1650Z.210629T0245Z.210630T1200Z.NO/
1041 AM CDT Tue Jun 29 2021
...The Flood Warning is now in effect until early tomorrow
afternoon...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Wednesday afternoon.
* At 9:30 AM CDT Tuesday the stage was 463.5 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 9:30 AM CDT Tuesday was 463.7 feet.
* Forecast...The river is expected to rise to a crest of 463.5 feet
this afternoon. It will then fall below flood stage tomorrow
morning.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
* Flood History...This crest compares to a previous crest of 463.5
feet on 02/10/2008.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
Birk256
WGUS83 KLOT 300200
FLSLOT
Flood Statement
National Weather Service Chicago IL
900 PM CDT Tue Jun 29 2021
...The Flood Warning is extended for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
Illinois River at Morris affecting La Salle and Grundy Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
&&
ILC011-099-155-301700-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-210705T0000Z/
/LSLI2.1.ER.210627T1049Z.210630T1200Z.210704T1800Z.NO/
900 PM CDT Tue Jun 29 2021
...The Flood Warning is now in effect until Sunday evening...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Sunday evening.
* At 7:45 PM CDT Tuesday the stage was 24.8 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 7:45 PM CDT Tuesday was 24.8 feet.
* Forecast...The river is expected to rise to a crest of 25.0 feet
tomorrow morning. It will then fall below flood stage early Sunday
afternoon.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-301700-
/O.EXT.KLOT.FL.W.0012.000000T0000Z-210701T1800Z/
/OTWI2.1.ER.210627T1650Z.210630T1200Z.210701T1048Z.NO/
900 PM CDT Tue Jun 29 2021
...The Flood Warning is now in effect until early Thursday
afternoon...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Thursday afternoon.
* At 8:30 PM CDT Tuesday the stage was 463.7 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 8:30 PM CDT Tuesday was 463.8 feet.
* Forecast...The river is expected to rise to a crest of 464.0 feet
tomorrow morning. It will then fall below flood stage early
Thursday morning.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
ILC063-099-301700-
/O.EXT.KLOT.FL.W.0018.210630T0208Z-210630T1800Z/
/MORI2.1.ER.210630T0208Z.210630T1200Z.210630T1617Z.NO/
900 PM CDT Tue Jun 29 2021
...The Flood Warning is now in effect until early tomorrow
afternoon...
The Flood Warning continues for
the Illinois River at Morris.
* Until Wednesday afternoon.
* At 8:45 PM CDT Tuesday the stage was 16.0 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late
this evening to a crest of 16.5 feet tomorrow morning. It will
then fall below flood stage late tomorrow morning.
* Impact...At 16.0 feet, Pine Bluff Road, west of Route 47, and
Dwight Roads flood on south side of river.
&&
LAT...LON 4137 8879 4134 8860 4144 8822 4137 8820
4126 8867 4130 8879
$$
Kluber106
WGUS83 KLOT 301620
FLSLOT
Flood Statement
National Weather Service Chicago IL
1120 AM CDT Wed Jun 30 2021
...The Flood Warning is extended for the following river in
Illinois...
Illinois River at Morris affecting La Salle and Grundy Counties.
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected by this evening.
&&
ILC063-099-010115-
/O.EXT.KLOT.FL.W.0018.000000T0000Z-210701T0112Z/
/MORI2.1.ER.210630T0215Z.210630T0530Z.210630T1912Z.NO/
1120 AM CDT Wed Jun 30 2021
...The Flood Warning is now in effect until this evening...
The Flood Warning continues for
the Illinois River at Morris.
* Until this evening.
* At 10:45 AM CDT Wednesday the stage was 16.3 feet.
* Flood stage is 16.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Wednesday was 16.6 feet.
* Forecast...The river is expected to fall below flood stage this
afternoon and continue falling to 7.5 feet Wednesday morning.
* Impact...At 16.0 feet, Pine Bluff Road, west of Route 47, and
Dwight Roads flood on south side of river.
&&
LAT...LON 4137 8879 4134 8860 4144 8822 4137 8820
4126 8867 4130 8879
$$
ILC011-099-155-010730-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-000000T0000Z/
/LSLI2.1.ER.210627T1049Z.210630T1800Z.000000T0000Z.NO/
1120 AM CDT Wed Jun 30 2021
...The Flood Warning is now in effect until further notice...
The Flood Warning continues for
the Illinois River at La Salle.
* Until further notice.
* At 10:45 AM CDT Wednesday the stage was 25.0 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Wednesday was 25.0 feet.
* Forecast...The river is expected to rise to a crest of 25.1 feet
this afternoon.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-010730-
/O.EXT.KLOT.FL.W.0012.000000T0000Z-210702T0430Z/
/OTWI2.1.ER.210627T1650Z.210630T1300Z.210701T2230Z.NO/
1120 AM CDT Wed Jun 30 2021
...The Flood Warning is now in effect until late tomorrow evening...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Thursday evening.
* At 10:30 AM CDT Wednesday the stage was 463.9 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:30 AM CDT Wednesday was 464.0 feet.
* Forecast...The river is expected to rise to a crest of 464.0 feet
this afternoon. It will then fall below flood stage tomorrow
afternoon.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
RC280
WGUS83 KLOT 301630 CCA
FLSLOT
Flood Statement...CORRECTED
National Weather Service Chicago IL
1130 AM CDT Wed Jun 30 2021
...The Flood Warning is extended for the following river in
Illinois...
Illinois River at Morris affecting La Salle and Grundy Counties.
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Warning means water levels above flood stage are imminent or
already occurring. Persons along rivers and streams in the warned
area should take immediate precautions to protect life and property.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected by this evening.
&&
ILC063-099-010115-
/O.COR.KLOT.FL.W.0018.000000T0000Z-210701T0112Z/
/MORI2.1.ER.210630T0215Z.210630T0530Z.210630T1912Z.NO/
1130 AM CDT Wed Jun 30 2021
...The Flood Warning is now in effect until this evening...
The Flood Warning continues for
the Illinois River at Morris.
* Until this evening.
* At 10:45 AM CDT Wednesday the stage was 16.3 feet.
* Flood stage is 16.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Wednesday was 16.6 feet.
* Forecast...The river is expected to rise to flood stage just after
midnight tonight to a crest of 16.0 feet. It will then fall below
flood stage tomorrow morning.
* Impact...At 16.0 feet, Pine Bluff Road, west of Route 47, and
Dwight Roads flood on south side of river.
&&
LAT...LON 4137 8879 4134 8860 4144 8822 4137 8820
4126 8867 4130 8879
$$
ILC011-099-155-010730-
/O.COR.KLOT.FL.W.0013.000000T0000Z-000000T0000Z/
/LSLI2.1.ER.210627T1049Z.210630T1800Z.000000T0000Z.NO/
1130 AM CDT Wed Jun 30 2021
...The Flood Warning is now in effect until further notice...
The Flood Warning continues for
the Illinois River at La Salle.
* Until further notice.
* At 10:45 AM CDT Wednesday the stage was 25.0 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Wednesday was 25.0 feet.
* Forecast...The river is expected to rise to a crest of 25.1 feet
this afternoon.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-010730-
/O.COR.KLOT.FL.W.0012.000000T0000Z-210702T0430Z/
/OTWI2.1.ER.210627T1650Z.210630T1300Z.210701T2230Z.NO/
1130 AM CDT Wed Jun 30 2021
...The Flood Warning is now in effect until late tomorrow evening...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Thursday evening.
* At 10:30 AM CDT Wednesday the stage was 463.9 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:30 AM CDT Wednesday was 464.0 feet.
* Forecast...The river is expected to rise to a crest of 464.0 feet
this afternoon. It will then fall below flood stage tomorrow
afternoon.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
RC844
WGUS83 KLOT 010138
FLSLOT
Flood Statement
National Weather Service Chicago IL
838 PM CDT Wed Jun 30 2021
...The Flood Warning continues for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected around 1145 AM CDT Thursday morning.
&&
ILC011-099-155-011645-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-210708T0300Z/
/LSLI2.1.ER.210627T1049Z.210701T0045Z.210707T2100Z.NO/
838 PM CDT Wed Jun 30 2021
...The Flood Warning is now in effect until late Wednesday evening...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Wednesday evening.
* At 7:45 PM CDT Wednesday the stage was 25.1 feet and cresting.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast...The river is expected to start to fall Thursday
evening, and fall below flood stage in the middle of next week.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-011645-
/O.EXT.KLOT.FL.W.0012.000000T0000Z-210702T0000Z/
/OTWI2.1.ER.210627T1650Z.210630T1300Z.210701T1800Z.NO/
838 PM CDT Wed Jun 30 2021
...The Flood Warning is now in effect until tomorrow evening...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Thursday evening.
* At 7:30 PM CDT Wednesday the stage was 463.6 feet and gradually
falling.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast...The river is expected to fall below flood stage early
Thursday afternoon.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
Friedlein096
WGUS83 KLOT 011521
FLSLOT
Flood Statement
National Weather Service Chicago IL
1021 AM CDT Thu Jul 1 2021
...The Flood Warning is extended for the following rivers in
Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are imminent or
may already occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement is expected around 130 AM CDT late tonight.
&&
ILC011-099-155-020630-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-000000T0000Z/
/LSLI2.1.ER.210627T1049Z.210701T0045Z.000000T0000Z.NO/
1021 AM CDT Thu Jul 1 2021
...The Flood Warning is now in effect until further notice...
The Flood Warning continues for
the Illinois River at La Salle.
* Until further notice.
* At 9:45 AM CDT Thursday the stage was 25.0 feet and cresting.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast...The river is expected to continue to crest at 25.0 feet
through tonight.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-020630-
/O.EXT.KLOT.FL.W.0012.000000T0000Z-210702T1800Z/
/OTWI2.1.ER.210627T1650Z.210630T1300Z.210702T1200Z.NO/
1021 AM CDT Thu Jul 1 2021
...The Flood Warning is now in effect until early tomorrow
afternoon...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Friday afternoon.
* At 9:30 AM CDT Thursday the stage was 463.3 feet and nearly steady.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast...The river is expected to remain nearly steady through
this evening. It will then fall below flood stage tomorrow morning.
* Impact...At 464.0 feet, Backwater causes the Fox River to reach
bankfull near St. Elizabeth Medical Center in Ottawa.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
Friedlein360
WGUS83 KLOT 020138
FLSLOT
Flood Statement
National Weather Service Chicago IL
838 PM CDT Thu Jul 1 2021
...The Flood Warning continues for the following river in Illinois...
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Illinois River at Ottawa affecting La Salle County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flood Warning means water levels above flood stage are already
occurring. Persons along rivers and streams in the warned area
should take precautions to protect life and property.
Additional information is available at www.weather.gov/Chicago and
water.weather.gov
The next statement will be issued on Friday morning.
&&
ILC011-099-155-021645-
/O.EXT.KLOT.FL.W.0013.000000T0000Z-210708T1200Z/
/LSLI2.1.ER.210627T1049Z.210701T0045Z.210708T0600Z.NO/
838 PM CDT Thu Jul 1 2021
...The Flood Warning is now in effect until Thursday morning...
The Flood Warning continues for
the Illinois River at La Salle.
* Until Thursday morning.
* At 7:45 PM CDT Thursday the stage was 24.8 feet.
* Flood stage is 20.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 7:45 PM CDT Thursday was 25.1 feet.
* Forecast...The river is expected to fall below flood stage early
Thursday morning and continue falling to 19.6 feet Thursday
evening.
&&
LAT...LON 4131 8940 4135 8933 4137 8898 4128 8899
4128 8929
$$
ILC099-021500-
/O.EXT.KLOT.FL.W.0012.000000T0000Z-210702T1500Z/
/OTWI2.1.ER.210627T1650Z.210630T1300Z.210702T0900Z.NO/
838 PM CDT Thu Jul 1 2021
...The Flood Warning is now in effect until late tomorrow morning...
The Flood Warning continues for
the Illinois River at Ottawa.
* Until Friday morning.
* At 7:30 PM CDT Thursday the stage was 463.2 feet.
* Flood stage is 463.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 7:30 PM CDT Thursday was 463.5 feet.
* Forecast...The river is expected to fall below flood stage late
tonight and continue falling to 459.1 feet Thursday evening.
* Impact...At 462.5 feet, Roadway entrance to Allen Park threatened
in Ottawa. Allen Park west boat ramp inundated in Ottawa.
&&
LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899
$$
RC919 WGUS83 KLOT 021014 FLSLOT Flood Statement National Weather Service Chicago IL 514 AM CDT Fri Jul 2 2021 ...The Flood Warning is cancelled for the following rivers in Illinois... Illinois River at Ottawa affecting La Salle County. ILC099-021115- /O.CAN.KLOT.FL.W.0012.000000T0000Z-210702T1014Z/ /OTWI2.1.ER.210627T1650Z.210630T1300Z.210702T0900Z.NO/ 514 AM CDT Fri Jul 2 2021 ...The Flood Warning for the Illinois River at Ottawa has been cancelled... The Flood Warning is cancelled for the Illinois River at Ottawa. * At 4:30 AM CDT Friday the stage was 462.9 feet. * Flood stage is 463.0 feet. * Forecast...The river is expected to continue falling. && LAT...LON 4137 8898 4137 8879 4130 8879 4128 8899 $$ Birk
What forecasters said that day
The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Chicago, IL wrote its last area forecast discussion before this river flood warning went out at Jun 26, 6:36 PM CDT, 3 hours 38 minutes earlier.
Area forecast discussion, Jun 26, 6:36 PM CDT, 3 hours 38 minutes before
Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
636 PM CDT Sat Jun 26 2021
.MESOSCALE DISCUSSION...
259 PM CDT
As we've been dealing with since the late morning, concerns
continue to include brief tornadoes, strong downburst winds, and
flash flooding. Area of interest is similar to those already
impacted earlier, if a bit farther south. This is near and
southeast of the I-55 corridor. Isolated showers/storms will be
possible north of this, though with much less instability with
northward extent, not expecting the intensity like with farther
south.
An MCV noted emanating from near St Louis area interacted with
brief clearing that occurred into western and west central
Illinois to fire new convection southwest of the ongoing storms.
These have exhibited robust lower level mesos in the strongest
storms like has occurred over our area. This is tied to good low
level hodograph curvature for Bunkers right moving storms
yielding near 150 to 200 m2/s2 of 0-1km SRH, along with 0-3 km
MLCAPE of 100-175 J/kg. Over the next 2-3 hours we'll be watching
the ongoing storms for strengthening low level rotation, as well
as the storms over west central Illinois approaching the central
IL counties in our CWA.
Finally, the 2"+ PWAT axis draped across the region will continue
to support torrential downpours in the strongest convection
capable of flash flooding. The earlier issued FFW for the Chicago
metro did have reports of flash flood impacts within it. Issued a
large Flood Advisory for areas currently and to continue to be
impacted over the next few hours, with the expectation of likely
needing to issue at least a few targeted Flash Flood Warnings. Of
particular concern is the eastern Livingston, northern Ford
Panhandle into northwest Iroquois, which has received at least 6"
of rain the past couple days, if they receive multiple additional
rounds of convection.
Castro
&&
.SHORT TERM...
340 PM CDT
Through Sunday...
Expect that showers and thunderstorms will continue to line up
from southwest to northeast near and east of I-55 into early
evening with a shift to the southeast with time. Forcing looks
then become less coherent through the evening but the
southwesterly flow aloft will persist so will maintain a chance
for showers and some thunderstorms overnight. Have left the flash
flood watch as is for now as did not have much time to fully
assess but may be able to trim western sections out this evening
and possibly the entire watch if the corridor of thunderstorms
shifts to the east.
For Sunday, guidance is in agreement in pushing a frontal boundary
southward into the area later in the day. The airmass does not
look as favorable for shower/storms but cannot rule out some
isolated to scattered activity with the front in the afternoon.
MDB
&&
.LONG TERM...
340 PM CDT
No major changes in thinking for the long term so previous
discussion follow...
Sunday night through Friday...
Long term forecast concerns continue to be focused on the threat
of additional periods thunderstorms especially into the first half
of the coming week, as the upper pattern remains largely
unchanged. As we remain within a very moist air mass, storms will
likely remain capable of torrential downpours and flooding.
Unusually strong upper ridging over the Pacific Northwest, and
another strong upper ridge centered just of the mid-Atlantic coast
will maintain an upper level trough from Hudson Bay to the
central Plains into early next week. South-southwest flow east of
the trough axis will maintain a feed of deep Gulf moisture into
the mid- Mississippi Valley and western/southern Great Lakes
region during this time, as depicted by a plume of PWATs around 2
inches which is progged to remain in the vicinity of the forecast
area during the first half of the week. A weak surface cold front
will push into the CWA Sunday, but is expected to wash out and
become diffuse in the vicinity of the forecast area as southwest
flow aloft maintains warm/moist advection into the region. This
would tend to lift or redevelop the diffuse front back north later
Monday night and Tuesday, thus additional rounds of periodic
showers and thunderstorms will likely continue to affect the
forecast area early in the week. Since we're already seen some
significant rainfall across some parts of the forecast area over
the past two days, any further rounds of heavy-rain producing
storms over the next several days will only serve to increase
flooding/flash flooding potential across the region. Of course,
rain threat will likely be modulated by individual small-scale
short waves or MCV features and it won't rain continuously, but
total amounts will need to be monitored.
By mid-week (Wednesday), ridging off the mid-Atlantic coast
weakens and drifts east a bit, allowing some eastward shift of
the upper trough across the upper Midwest and western Lakes
region. With a more westerly component to the flow aloft, this
looks to foster a southeastward shift in the axis of deeper
moisture into the Ohio Valley region. Medium-range guidance
continues to trend toward digging additional upper energy south
from Ontario during the Wednesday into Thursday period however,
and developing a closed upper low across the western Lakes/mid-
Mississippi Valley region late in the week. While scouring out the
deeper moisture, this mid- level circulation would likely
continue to support a threat of at least diurnally-driven
showers/thunderstorms to end the week and possibly into the
weekend.
Temperature wise, conditions look to remain seasonably warm and
rather humid for the first half of the week. Cooler conditions are
likely late in the week as flow turns more north-northwesterly.
MDB/Ratzer
&&
.AVIATION...
For the 00Z TAFs...
Rain continues across ORD/MDW/GYY but will be diminishing in the
next few hours. Some spotty MVFR level clouds are in the area but
am not expecting MVFR ceilings at this point. Will need to watch
thunderstorms moving east across eastern Iowa as they may hold
together to some degree but latest guidance suggest they will
fade. Will need to keep an eye on this and may need to include a
mention of showers after 06 or 08z or so. Sunday will be less
favorable for shower/thunder activity than today but cannot rule
out something isolated through the day. A weak front will arrive
from the north but likely fall apart as it arrives late in the
afternoon but there may be enough forcing to trigger some isolated
showers/storms so will carry a PROB30 mention for now. Expect a
steady southwest wind overnight which which may become gusty to
near 20 kt later Sunday morning. The dissipating front may result
in some erratic winds in the afternoon but they may turn north to
northeast toward 00z.
MDB
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...Flash Flood Watch...ILZ010-ILZ011-ILZ012-ILZ013-ILZ019-ILZ020-
ILZ021-ILZ023-ILZ032-ILZ033-ILZ039-ILZ103-ILZ104-ILZ105-
ILZ106-ILZ107-ILZ108 until 7 AM Sunday.
IN...Flash Flood Watch...INZ001-INZ002-INZ010-INZ011-INZ019 until 7
AM Sunday.
LM...None.
&&
Visit us at weather.gov/chicago
Follow us on Facebook, Twitter, and YouTube at:
www.facebook.com/NWSChicago
www.twitter.com/NWSChicago
www.youtube.com/NWSChicagoHazardous weather outlook, Jun 26, 4:24 PM CDT, 5 hours 50 minutes before
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
424 PM CDT Sat Jun 26 2021
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-272130-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
424 PM CDT Sat Jun 26 2021 /524 PM EDT Sat Jun 26 2021/
This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Limited Tornado risk.
Limited hail risk...up to quarter size.
Limited damaging wind risk...up to 70 mph|.
Limited Flooding Risk.
Limited Non thunderstorm wind Risk.
DISCUSSION...
Showers and thunderstorms will continue to move northeastward
along and south of the Interstate 55 corridor into this evening.
Torrential rainfall will occur with these storms along with the
possibility of isolated tornadoes and damaging wind gusts to 70
mph. Flash flooding is also possible. Thunderstorm coverage and
intensity is expected to wane later this evening.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Limited Severe Thunderstorm Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.
Monday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Tuesday through Friday...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the northeast at around 35 mph.
LMZ740>745-272130-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
424 PM CDT Sat Jun 26 2021
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Hazardous conditions for small craft.
Elevated Thunderstorm Risk...with an associated:
Limited Waterspout Risk.
Limited hail risk...up to quarter size.
Limited thunderstorm wind gust risk...up to 55 kt.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday through Friday...
Limited Thunderstorm Risk.
MDB
Visit us at http://weather.gov/chicago
Follow us on Facebook, Twitter, and Youtube at:
www.facebook.com/nwschicago
www.twitter.com/nwschicago
www.youtube.com/nwschicagoIn the hours before
Local storm report, Jun 26, 5:29 PM CDT, 4 hours 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
529 PM CDT SAT JUN 26 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0436 PM TSTM WND DMG CHATSWORTH 40.75N 88.29W
06/26/2021 LIVINGSTON IL CO-OP OBSERVER
TREES DOWNED, CAMPER BLOWN OVER, GARAGE
BUILDING DAMAGED.
&&
ROLocal storm report, Jun 26, 5:52 PM CDT, 4 hours 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
552 PM CDT SAT JUN 26 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 PM FLASH FLOOD 1 SW HERMOSA - CHICAGO 41.91N 87.75W
06/26/2021 COOK IL PUBLIC
ROAD UNDERNEATH OVERPASS FLOODED. CAR
SUBMERGED IN FLOOD WATERS.
&&
ROLocal storm report, Jun 26, 6:25 PM CDT, 3 hours 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
625 PM CDT SAT JUN 26 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0615 PM FUNNEL CLOUD EARL PARK 40.69N 87.41W
06/26/2021 BENTON IN EMERGENCY MNGR
BRIEF FUNNEL CLOUDS REPORTED VIA EMERGENCY
MANAGEMENT OVER EARL PARK.
&&
PETRLocal storm report, Jun 26, 6:42 PM CDT, 3 hours 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
642 PM CDT SAT JUN 26 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM FLASH FLOOD 1 WNW GLENWOOD 41.55N 87.63W
06/26/2021 COOK IL PUBLIC
PHOTOS SHARED ON SOCIAL MEDIA SHOW GEORGE
ARQUILLA PARK IN GLENWOOD FLOODED.
&&
ROLocal storm report, Jun 26, 7:43 PM CDT, 2 hours 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
743 PM CDT SAT JUN 26 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM FLASH FLOOD 1 E SAUNEMIN 40.89N 88.38W
06/26/2021 LIVINGSTON IL EMERGENCY MNGR
ROUTE 116 NEAR SAUNEMIN CLOSED DUE TO
FLOODING.
&&
ROLocal storm report, Jun 26, 7:48 PM CDT, 2 hours 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
748 PM CDT SAT JUN 26 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM FLASH FLOOD 3 W CHATSWORTH 40.76N 88.35W
06/26/2021 LIVINGSTON IL EMERGENCY MNGR
E 900 RD N BETWEEN FORREST AND CHATSWORTH
CLOSED DUE TO FLOODING.
&&
ROThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 8:31 PM CDT | River Flood Warning | LOT | Cook | 22 hr |
| Jun 26, 8:55 PM CDT | River Flood Warning | LOT | Iroquois | 4 days |
| Jun 26, 9:01 PM CDT | River Flood Warning | LOT | Grundy | 14 hr |
| Jun 26, 9:13 PM CDT | River Flood Warning | LOT | LaSalle | 3 days |
| Jun 26, 9:24 PM CDT | River Flood Advisory | LOT | Will | 10 hr |
| Jun 26, 9:28 PM CDT | River Flood Advisory | LOT | DuPage, Will | 23 hr |
| Jun 26, 9:38 PM CDT | Areal Flood Advisory | LOT | Cook, Ford, Iroquois, Kankakee, Livingston, Will | 9 hr |
| Jun 26, 10:10 PM CDT | River Flood Warning | LOT | Grundy, LaSalle | 40 hr |
| Jun 26, 10:17 PM CDT | River Flood Warning | LOT | Bureau, LaSalle, Putnam | 10 days |
| Jun 26, 11:03 PM CDT | River Flood Advisory | LOT | Grundy, Kankakee, Will | 6 days |
| Jun 27, 11:06 AM CDT | River Flood Advisory | LOT | Grundy | 25 hr |
| Jun 27, 11:45 AM CDT | River Flood Advisory | LOT | Iroquois | 34 hr |
Nearby
River Flood Warnings in Illinois, 2021Every river flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.