Alert archive / Iowa / River Flood Warnings in 2021
River Flood Warning 3, NWS Des Moines, IA
NWS Des Moines, IA issued this river flood warning at Aug 30, 2021, 12:36 PM CDT for Black Hawk County, Iowa. It took effect at Aug 31, 2021, 12:34 AM CDT. It was in force for 13 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2021, 12:36 PM CDT (17:36 UTC)
- In effect from
- Aug 31, 2021, 12:34 AM CDT
- Expired
- Aug 31, 2021, 1:52 PM CDT
- In force
- 13 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- Minor
County Black Hawk County, IA
The radar
The Des Moines radar (KDMX), 144 km from the middle of the area, began a volume at 17:37 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 Cedar River at Waterloo (ALOI4). The gauge peaked at 12.40 ft at Aug 31, 2021, 1:00 PM CDT.
- Action stage
- 8.5 ft
- Minor stage
- 13 ft
- Moderate stage
- 19 ft
- Major stage
- 21 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 05464000, 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.
798
WGUS43 KDMX 301736
FLWDMX
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Des Moines IA
1236 PM CDT Mon Aug 30 2021
...The National Weather Service in Des Moines IA has issued a Flood
Warning for the following rivers in Iowa...
Cedar River at Waterloo affecting Black Hawk County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued late tonight at 1245 AM CDT.
&&
IAC013-310545-
/O.NEW.KDMX.FL.W.0003.210831T0534Z-210902T0718Z/
/ALOI4.1.ER.210831T0534Z.210831T1800Z.210901T0717Z.NO/
1236 PM CDT Mon Aug 30 2021
The National Weather Service in Des Moines has issued a
* Flood Warning for
the Cedar River at Waterloo.
* From late tonight to early Thursday morning.
* At 11:00 AM CDT Monday the stage was 9.9 feet and rising.
* Flood stage is 13.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage just
after midnight tonight to a crest of 14.5 feet early tomorrow
afternoon. It will then fall below flood stage early Wednesday
morning.
* Impact...At 13.0 feet, Many storm sewers are closed along Black
Hawk Creek and the Cedar River. The Fletcher Avenue levee gates
are closed.
* Flood History...This crest compares to a previous crest of 14.5
feet on 03/14/1973.
&&
LAT...LON 4256 9238 4238 9207 4230 9207 4230 9222
4251 9245
$$
Zogg4 follow-up statements
834
WGUS83 KDMX 310151
FLSDMX
Flood Statement
National Weather Service Des Moines IA
851 PM CDT Mon Aug 30 2021
...The Flood Warning is extended for the following rivers in Iowa...
Cedar River at Cedar Falls affecting Black Hawk County.
Cedar River at Janesville affecting Butler, Bremer and Black Hawk
Counties.
Cedar River at Waterloo affecting Black Hawk County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued Tuesday morning at 900 AM CDT.
&&
IAC013-311400-
/O.EXT.KDMX.FL.W.0002.000000T0000Z-210902T1800Z/
/CEDI4.2.ER.210830T1548Z.210831T1200Z.210901T1800Z.NO/
851 PM CDT Mon Aug 30 2021
...The Flood Warning is now in effect until early Thursday
afternoon...
The Flood Warning continues for
the Cedar River at Cedar Falls.
* Until early Thursday afternoon.
* At 7:45 PM CDT Monday the stage was 90.5 feet and rising.
* Flood stage is 89.0 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 7:45 PM CDT Monday was 90.5 feet.
* Forecast...The river is expected to rise to a crest of 92.4 feet
tomorrow morning. It will then fall below flood stage early
Wednesday afternoon.
* Impact...At 92.2 feet, Water is in southeast corner of Gateway
Park.
* Flood History...This crest compares to a previous crest of 92.4
feet on 04/18/1973.
&&
LAT...LON 4256 9238 4251 9245 4258 9255 4262 9255
4262 9241
$$
IAC013-017-023-311400-
/O.EXT.KDMX.FL.W.0001.000000T0000Z-210901T1222Z/
/JANI4.1.ER.210830T0625Z.210830T1445Z.210831T1222Z.NO/
851 PM CDT Mon Aug 30 2021
...The Flood Warning is now in effect until Wednesday morning...
The Flood Warning continues for
the Cedar River at Janesville.
* Until Wednesday morning.
* At 7:45 PM CDT Monday the stage was 14.7 feet and falling.
* Flood stage is 13.0 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 Monday was 15.1 feet.
* Forecast...The river is expected to fall below flood stage
tomorrow morning and continue falling to 3.0 feet Monday evening.
* Impact...At 14.0 feet, Areas of Janesville south of 8th Street are
threatened.
* Flood History...This crest compares to a previous crest of 14.6
feet on 05/22/2013.
&&
LAT...LON 4269 9230 4261 9236 4260 9249 4262 9249
4269 9249
$$
IAC013-311400-
/O.EXT.KDMX.FL.W.0003.210831T1000Z-210902T0830Z/
/ALOI4.1.ER.210831T1000Z.210901T0000Z.210901T0830Z.NO/
851 PM CDT Mon Aug 30 2021
...The Flood Warning is now in effect until early Thursday morning...
The Flood Warning continues for
the Cedar River at Waterloo.
* From late tonight to early Thursday morning.
* At 8:00 PM CDT Monday the stage was 10.9 feet and rising.
* Flood stage is 13.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late
tonight to a crest of 14.2 feet tomorrow evening. It will then
fall below flood stage early Wednesday morning.
* Impact...At 13.0 feet, Many storm sewers are closed along Black
Hawk Creek and the Cedar River. The Fletcher Avenue levee gates
are closed.
* Flood History...This crest compares to a previous crest of 14.2
feet on 06/15/2013.
&&
LAT...LON 4256 9238 4238 9207 4230 9207 4230 9222
4251 9245
$$
REV770
WGUS83 KDMX 310752
FLSDMX
Flood Statement
National Weather Service Des Moines IA
252 AM CDT Tue Aug 31 2021
...The Flood Warning is extended for the following rivers in Iowa...
Cedar River at Waterloo affecting Black Hawk County.
...The Flood Warning continues for the following rivers in Iowa...
Cedar River at Cedar Falls affecting Black Hawk County.
Cedar River at Janesville affecting Butler, Bremer and Black Hawk
Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued this afternoon at 300 PM CDT.
&&
IAC013-312000-
/O.EXT.KDMX.FL.W.0003.210831T1043Z-210902T0830Z/
/ALOI4.1.ER.210831T1043Z.210901T0000Z.210901T0830Z.NO/
252 AM CDT Tue Aug 31 2021
...The Flood Warning is now in effect until early Thursday morning...
The Flood Warning continues for
the Cedar River at Waterloo.
* Until early Thursday morning.
* At 2:00 AM CDT Tuesday the stage was 11.8 feet and rising.
* Flood stage is 13.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage early
this morning to a crest of 14.2 feet this evening. It will then
fall below flood stage late tonight.
* Impact...At 13.0 feet, Many storm sewers are closed along Black
Hawk Creek and the Cedar River. The Fletcher Avenue levee gates
are closed.
* Flood History...This crest compares to a previous crest of 14.2
feet on 06/15/2013.
&&
LAT...LON 4256 9238 4238 9207 4230 9207 4230 9222
4251 9245
$$
IAC013-312000-
/O.CON.KDMX.FL.W.0002.000000T0000Z-210902T1800Z/
/CEDI4.2.ER.210830T1548Z.210831T1200Z.210901T1800Z.NO/
252 AM CDT Tue Aug 31 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Cedar River at Cedar Falls.
* Until early Thursday afternoon.
* At 1:45 AM CDT Tuesday the stage was 91.3 feet and rising.
* Flood stage is 89.0 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 1:45 AM CDT Tuesday was 91.3 feet.
* Forecast...The river is expected to rise to a crest of 92.4 feet
this morning. It will then fall below flood stage early tomorrow
afternoon.
* Impact...At 92.2 feet, Water is in southeast corner of Gateway
Park.
* Flood History...This crest compares to a previous crest of 92.4
feet on 04/18/1973.
&&
LAT...LON 4256 9238 4251 9245 4258 9255 4262 9255
4262 9241
$$
IAC013-017-023-312000-
/O.CON.KDMX.FL.W.0001.000000T0000Z-210901T1222Z/
/JANI4.1.ER.210830T0625Z.210830T1445Z.210831T1222Z.NO/
252 AM CDT Tue Aug 31 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Cedar River at Janesville.
* Until tomorrow morning.
* At 1:45 AM CDT Tuesday the stage was 14.3 feet and falling.
* Flood stage is 13.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 1:45 AM CDT Tuesday was 15.0 feet.
* Forecast...The river is expected to fall below flood stage this
morning and continue falling to 3.0 feet Monday evening.
* Impact...At 14.0 feet, Areas of Janesville south of 8th Street are
threatened.
* Flood History...This crest compares to a previous crest of 14.3
feet on 04/07/1965.
&&
LAT...LON 4269 9230 4261 9236 4260 9249 4262 9249
4269 9249
$$
Donavon994
WGUS83 KDMX 311538
FLSDMX
Flood Statement
National Weather Service Des Moines IA
1038 AM CDT Tue Aug 31 2021
...The Flood Warning continues for the following rivers in Iowa...
Cedar River at Waterloo affecting Black Hawk County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
Additional information is available at www.weather.gov.
The next statement will be issued this evening by 900 PM CDT.
&&
IAC013-010200-
/O.EXT.KDMX.FL.W.0003.000000T0000Z-210901T0200Z/
/ALOI4.1.ER.210901T0000Z.210901T0000Z.210901T0000Z.NO/
1038 AM CDT Tue Aug 31 2021
...The Flood Warning is now in effect until late this evening...
The Flood Warning continues for
the Cedar River at Waterloo.
* Until late this evening.
* At 10:00 AM CDT Tuesday the stage was 12.3 feet and rising.
* Flood stage is 13.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise to a crest of 13.0 feet
this evening.
* Impact...At 13.0 feet, Many storm sewers are closed along Black
Hawk Creek and the Cedar River. The Fletcher Avenue levee gates
are closed.
&&
LAT...LON 4256 9238 4238 9207 4230 9207 4230 9222
4251 9245
$$
KCM134
WGUS83 KDMX 311852
FLSDMX
Flood Statement
National Weather Service Des Moines IA
152 PM CDT Tue Aug 31 2021
...The Flood Warning is cancelled for the following rivers in Iowa...
Cedar River at Waterloo affecting Black Hawk County.
IAC013-312000-
/O.CAN.KDMX.FL.W.0003.000000T0000Z-210831T1852Z/
/ALOI4.1.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
152 PM CDT Tue Aug 31 2021
...The Flood Warning for the Cedar River at Waterloo has been
cancelled...
The Flood Warning is cancelled for
the Cedar River at Waterloo.
* At 1:00 PM CDT Tuesday the stage was 12.4 feet and falling.
* Flood stage is 13.0 feet.
* The river has crested below flood stage allowing the Flood Warning
to be cancelled.
* Forecast...The river is expected to fall below 8.5 feet Thursday
evening.
&&
LAT...LON 4256 9238 4238 9207 4230 9207 4230 9222
4251 9245
$$
KCMThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 9:15 AM CDT | Areal Flood Warning | DMX | Black Hawk, Bremer | 24 hr |
Nearby
River Flood Warnings in Iowa, 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.