Potential Flooding on Area Creeks & Rivers


After several inches of rain fell across northwestern parts of the KWWL viewing area, some area creeks and rivers have the threat for minor to moderate flooding.  The National Weather Service has issued a Flood Warning for portions of the Iowa River, Beaver Creek and Black Hawk Creek.  Here are the statements from the National Weather Service:

The National Weather Service in Des Moines has issued a Flood
Warning for all or portions of the following rivers in Iowa...Iowa
River...Beaver Creek...Black Hawk Creek...

  Affecting the following counties in Iowa...Black Hawk...Butler...

.Heavy rainfall since last night will lead to minor flooding along
portions of the Iowa River. Minor flooding is expected along
portions of Beaver Creek in the New Hartford area. Moderate
flooding is expected along portions of Black Hawk Creek in the
Hudson area.

River forecasts include observed precipitation...as well as expected
precipitation over the next 24 hours.


If you encounter a flooded area...turn around and find an alternate
route. Turn around...do not drown.

More information...including impact statements and crest histories
is available on the Web at...  www.weather.gov/desmoines. Click on
the Rivers and Lakes link.


939 PM CDT FRI AUG 28 2015

...Flood Warning in effect until early Sunday morning...

The National Weather Service in Des Moines has issued a
* Flood Warning for
  The Beaver Creek at New Hartford...or From Johnson Creek near
  Parkersburg...to the Cedar River.
* Until early Sunday morning.
* At  8:00 PM Friday the stage was 4.6 feet...or 7.4 feet below Flood
* Flood Stage is 12.0 feet.
* No flooding is occurring and Minor flooding is forecast.
* Forecast...rise to Flood Stage Saturday morning. Continue rising to
  12.9 feet...or 0.9 feet above Flood Stage...Saturday afternoon. Go
  below Flood Stage early Sunday morning.
* Impact...At  11.0 feet...Extensive agricultural flooding occurs
  south of town.



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This post was written by Schnack on August 28, 2015

Friday Preliminary Rain Totals

An area of low pressure is tracking through the state, producing heavy rainfall across parts of the KWWL viewing area.  Hometowns north of Highway 30 have taken the brunt of the heavy rain, and areas of flash flooding.  Here are some preliminary rain totals coming into the Forecast Center (as of 8PM Friday, August 28th).


Waterloo 3.57″
Dubuque 0.54″
Cedar Rapids 0.13″
Iowa City 0.02″
1 E Independence 3.10″
1 WNW Independence 2.20″
Belle Plaine 1.28″
Cedar Falls 3.49″
Charles City 1.42″
Dorchester 0.82″
Eldorado 0.90′
Elkader 0.80″
Evansdale 2.60″
Fayette 1.08″
Garber 0.35″
Grundy Center 3.90″
Hudson 2.90″
Ionia 1.52″
KWWL in Waterloo 3.10″
Littleport 0.47″
Nora Springs 1.69″
Parkersburg 4.50″
Quasqueton 1.43″
Riceville 1.38″
Van Horne 1.20″
Waterville 0.74″
Watson 0.77″
Wellsburg 5.10″

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This post was written by Schnack on August 28, 2015

Friday Rain Update

Our dry stretch of weather for this week is coming to an end.  An area of low pressure is developing over Nebraska and will track through Iowa Friday and Friday night, with showers and a few isolated thunderstorms overspreading the area.


The heaviest rain is forecast to be just north of the low pressure’s track, which would put the bulls-eye in parts of north central Iowa and southern Minnesota.  Those areas could see 2+”.  Hometowns like New Hampton, Decorah. Dubuque and Waterloo could see 1″+, with a quarter to half inch (isolated higher amounts possible).   South of Highway 20 (Cedar Rapids, Iowa City, Washington) could see a quarter to half inch of rain through Friday night.

We dry out early Saturday, and remain dry through at least the middle of next week.


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This post was written by Schnack on August 27, 2015

Storms From A Distance

The sky is clear across Iowa this evening. When I check our Storm Track 7 Live Weather Network camera in Dubuque you could see the clouds from the storms just north of the Quad Cities.

Weather Bug DBQ Temp

Here is a look from the visible satellite image showing where the clouds were at the same time as the image above.



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This post was written by Schnack on July 13, 2015

Flash Flooding Potential

It’s been a rainy stretch of weather across eastern Iowa in the past week.  With more heavy rain on the way, there is a threat for flash flooding across much of the area.  The map below shows how much rain the ground can handle within a 3 hour period before flash flooding occurs.  Much of the area can only handle an inch and a half to 2 inches.


Here is how much rain the WPC is forecasting for the area.  This is through tonight, and the bullseye of just over 3 1/2 inches across eastern Iowa.  Keep in mind, thunderstorms with heavier rain could drop heavier amounts within a short period of time.


With the heavy rain potential, a Flash Flood Watch goes into effect at 4 PM Wednesday, and lasts through Thursday morning for much of the KWWL viewing area.

Flash Flood Watch

Here’s a check of Storm Track 7 Live Doppler Radar (~2PM).  It’s showing some strong thunderstorms with heavy rain tracking east through the area.

KWWL 2015 MAX Storm ED

Right now, these storms are below severe limits.  Later this afternoon and evening that we need to keep an eye out for severe weather as a warm front tracks through the area.   We’ll keep an eye on it and break in on KWWL if need be.


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This post was written by Schnack on June 24, 2015

Warmer and Possible Storms this Weekend.

Forecast Bar

Tonight: Cloudy light rain tapering off. Low: 48-54. Wind: S 5-10 mph.

Friday: Partly to mostly cloudy and warmer. A stray afternoon storm possible south of Cedar Rapids. High: 73-78. Wind: SW 5-10 mph.

Friday Night: Mostly cloudy with a 20% chance of showers. Low: 59-63. Wind: S 5-10 mph.

Saturday: 50% chance of showers/storms and breezy (S 10-20 mph). High: near 80.

Sunday: 60% chance of showers/storms and windy (S 15-30 mph). High: near 80.

Monday: Mostly sunny. High: low 60s.

Tuesday: Mostly sunny. High: near 60.

Wednesday: 20% chance of showers. High: low 60s.

Thursday: Mostly cloudy. High: low 60s.

Weather Extra Bar

Light rain will taper off this evening. Not much rain accumulation today. Most locations just about everyone less than 0.25″ of rain. Here is the visible satellite from this afternoon.


Here is the reason why we didn’t have much rain and it took a while for everyone to see some rain. The morning sounding, showed the atmosphere was pretty dry. We had to overcome that before it started to rain. 

A sounding tells us many things about the atmosphere. This portion of it shows the temperature (red line) and dewpoint (green line). When they are close the atmosphere is saturated and when they are apart it is dry.


A nice spring day ahead tomorrow. Warmer temperatures and some sunshine will end our week. There is a very small chance of stray storm south of Cedar Rapids in the afternoon. Isolated showers are possible across all of eastern Iowa Friday night.

We are tracking another low pressure system forecast to move through the middle of the country this weekend. Some severe weather is possible with this storm.

Here is the position of the low and front Saturday and Sunday morning.


Ahead of the cold front there is a risk of severe weather. Timing and where the storms will fire up will be dealt with 12 to 24 hours before.


The outlook areas will adjust as needed once the storm pulls out into the middle of the country. The storms will be scattered and there might be some locations that remain dry this entire weekend. 


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This post was written by Schnack on May 14, 2015

24 Hour Rain Totals


7 AM Wednesday to 7 AM Thursday

*It is still raining in many location after 7 AM Thursday. Twenty-four hour rain totals will be posted again tomorrow.*

Location County 24-Hr
Waterloo Black Hawk 0.17
Dubuque Dubuque 0.00
Cedar Rapids Linn 0.00
Iowa City Johnson 0.00
IOWA FALLS, IA Hardin 0.70
BELLE PLAINE, IA Benton 0.05
VINTON, IA Benton 0.03
Waterloo 1.8 SSE Black Hawk 0.38
Waterloo 3.0 NNW Black Hawk 0.18
TRIPOLI, IA Bremer 0.20
STANLEY 4 W, IA Buchanan 0.02
Quasqueton 1.8 S Buchanan 0.04
Walker 3.5 NE Buchanan T
KESLEY 3 NNE, IA Butler 0.34
IONIA 2W, IA Chickasaw 0.40
NEW HAMPTON, IA Chickasaw 0.12
New Hampton 0.4 SW Chickasaw 0.24
VOLGA 1NE, IA Clayton 0.01
FAYETTE, IA Fayette 0.08
Waucoma 3.2 S Fayette 0.21
COLWELL, IA Floyd 0.24
HAMPTON, IA Franklin 0.13
Latimer 1.9 NE Franklin 0.44
CONRAD, IA Grundy 0.22
CRESCO 1NE, IA Howard 0.16
ELMA, IA Howard 0.15
Marengo 2.6 SSW Iowa T
Robins 0.4 SSE Linn 0.01
Central City 6.7 W Linn T
MARSHALLTOWN, IA Marshall 0.04
Marshalltown 1.7 NW Marshall 0.04
Marshalltown 1.4 ENE Marshall 0.04
OSAGE , IA Mitchell 0.28
ST ANSGAR, IA Mitchell T
GRINNELL 3 SW, IA Poweshiek 0.22
GILMAN, IA Poweshiek 0.05
CLUTIER, IA Tama 0.13
TOLEDO 3 N, IA Tama 0.07
Ottumwa 4.3 S Wapello 0.05
CALMAR, IA Winneshiek 0.18
Decorah 7.9 ENE Winneshiek 0.26
Decorah 0.8 SW Winneshiek 0.24
Fort Atkinson 0.2 SE Winneshiek 0.22

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This post was written by Denice Pelster on October 23, 2014

A Frosty Night

A Frost Advisory is in effect tonight for areas NW of a line from Waterloo to Decorah. Temperatures in this region will be around 33 or 34 degrees. Where there is no advisory, it is still going to be cold with temperatures more in the upper 30s.

Sep 12 Frost Adv


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This post was written by Schnack on September 12, 2014

Tracking a Wintry Mix

Forecast Bar

UPDATED at 4:30 PM

Tonight: Partly to mostly cloudy. Low: 14-21. Wind: SE 5-10 mph.

Thursday: Partly to mostly cloudy. High: 28-33. Wind: S 10-20 mph.

Thursday Night: Mostly cloudy. Low: 20-23. Wind: S 10-15 mph.

Friday: Cloudy with a 40% chance of a wintry mix. High: mid 30s.

Saturday: Partly cloudy. High: upper 20s.

Sunday: Mostly cloudy. High: mid 30s.

Monday: Partly cloudy. High: near 40.

Tuesday: Mostly cloudy with a 20% chance of rain/snow. High: mid 30s.

Wednesday: Mostly cloudy. High: upper 20s.



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This post was written by Schnack on March 5, 2014

Video of Meteor Thursday Evening

A security camera in North Liberty caught the meteor race across the sky Thursday evening.The camera is on the public works facility.

Meteor over North Liberty from City of North Liberty on Vimeo.


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This post was written by Schnack on December 27, 2013