Alert archive / Iowa / River Flood Warnings in 2017

River Flood Warning 15, NWS Sioux Falls, SD

May 20, 2017Buena Vista County, Clay County, Iowa

NWS Sioux Falls, SD issued this river flood warning at May 20, 2017, 9:19 PM CDT for Buena Vista County, Clay County, Iowa. It took effect at May 21, 2017, 10:14 AM CDT. It was in force for 10 days.

The area

The outline as issued.

The facts

Issued: May 20, 2017, 9:19 PM CDT (02:19 UTC)
In effect from: May 21, 2017, 10:14 AM CDT
Expired: May 31, 2017, 3:32 PM CDT
In force: 10 days
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

Counties Buena Vista County, IA, Clay County, IA

The radar

The Sioux Falls radar (KFSD), 143 km from the middle of the area, began a volume at 02:21 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 Little Sioux River at Linn Grove (LNNI4). The gauge peaked at 18.92 ft at May 25, 2017, 10:00 PM CDT.

Action stage: 14 ft
Minor stage: 16.5 ft
Moderate stage: 20 ft
Major stage: 22.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06605850, 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.

271 
WGUS43 KFSD 210219
FLWFSD
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Sioux Falls SD
919 PM CDT Sat May 20 2017

...The National Weather Service in Sioux Falls has issued a flood 
warning for the following rivers in Iowa...South Dakota...

  Big Sioux River above Hawarden
  Ocheyedan River Near Spencer
  Little Sioux River At Spencer
  Little Sioux River At Linn Grove
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC149-167-SDC127-220619-
/O.NEW.KFSD.FL.W.0012.170521T1800Z-170524T1312Z/
/HWDI4.1.ER.170521T1800Z.170523T1200Z.170524T0712Z.UU/
919 PM CDT Sat May 20 2017

The National Weather Service in Sioux Falls has issued a 

* Flood Warning for 
  The Big Sioux River above Hawarden.
* from Sunday afternoon to Wednesday morning.
* At 8PM Saturday the stage was 18.3 feet.
* Minor flooding is forecast.
* Flood stage is 19.0 feet.
* Forecast...The river will rise above flood stage by 3 am Sunday 
  and crest near 19.7 feet Tuesday afternoon May 23. 
* At stages near 19.0 feet...Agricultural flooding begins on the 
South Dakota side of the river. 

&&
 
LAT...LON 4331 9663 4331 9651 4314 9641 4303 9647
          4303 9654 4312 9654

$$

IAC041-220619-
/O.NEW.KFSD.FL.W.0013.170521T1000Z-170523T0900Z/
/SPOI4.1.ER.170521T1000Z.170521T1800Z.170522T0900Z.NO/
919 PM CDT Sat May 20 2017

The National Weather Service in Sioux Falls has issued a 

* Flood Warning for 
  The Ocheyedan River Near Spencer.
* from late tonight to late Monday night.
* At 8PM Saturday the stage was 7.6 feet.
* Minor flooding is forecast.
* Flood stage is 8.0 feet.
* Forecast...The river will rise above flood stage by 6 am Sunday 
  and crest near 8.3 feet Sunday afternoon May 21. 
* At stages near 8.0 feet...Minor flooding of pasture land begins. 

&&
 
LAT...LON 4318 9540 4318 9533 4315 9520 4313 9513
          4312 9524 4315 9540

$$

IAC041-220619-
/O.NEW.KFSD.FL.W.0014.170521T0219Z-170525T0900Z/
/SPWI4.1.ER.170521T0030Z.170522T1200Z.170524T0900Z.NO/
919 PM CDT Sat May 20 2017

The National Weather Service in Sioux Falls has issued a 

* Flood Warning for 
  The Little Sioux River At Spencer.
* until late Wednesday night.
* At 8PM Saturday the stage was 10.1 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 10.0 feet.
* Forecast...The river will crest near 11.2 feet by Monday May 22. 
  The river will fall below flood stage Wednesday May 24.
* At stages near 10.0 feet...The right bank overflows, and minor 
flooding of the Spencer city park and some rural agricultural areas 
begins. 

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-220619-
/O.NEW.KFSD.FL.W.0015.170521T1800Z-000000T0000Z/
/LNNI4.1.ER.170521T1800Z.170524T0600Z.000000T0000Z.NO/
919 PM CDT Sat May 20 2017

The National Weather Service in Sioux Falls has issued a 

* Flood Warning for 
  The Little Sioux River At Linn Grove.
* from Sunday afternoon until further notice.
* At 8PM Saturday the stage was 17.8 feet.
* Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...Rise above flood stage by 1 PM Sunday and crest near 
  18.5 feet by Wednesday May 24.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Maximum Forecast  
         Stage  Stage  Time      Stage  Time       

BIG SIOUX RIVER
HWDI4    19.0   18.31 Sat 8 PM    19.7  Tue 7 AM   

OCHEYEDAN RIVER
SPOI4    8.0     7.59 Sat 9 PM     8.3  Sun 1 PM    

LITTLE SIOUX RIVER
SPWI4    10.0   10.06 Sat 8 PM    11.3  Mon 7 AM    
LNNI4    18.0   17.84 Sat 8 PM    18.5  Wed 1 AM    

BA

11 follow-up statements

672 
WGUS83 KFSD 211525
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
1025 AM CDT Sun May 21 2017

...The Flood Warning continues for the following rivers in Iowa...
South Dakota...

  Big Sioux River above Hawarden
  Ocheyedan River Near Spencer
  Little Sioux River At Spencer
  Little Sioux River At Linn Grove
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC149-167-SDC127-221925-
/O.EXT.KFSD.FL.W.0012.170521T1603Z-170524T1200Z/
/HWDI4.1.ER.170521T1603Z.170523T0600Z.170524T0600Z.UU/
1025 AM CDT Sun May 21 2017

The Flood Warning continues for
  The Big Sioux River above Hawarden.
* until Wednesday morning.
* At 09AM Sunday the stage was 18.9 feet.
* Flood stage is 19.0 feet.
* Forecast...The river will crest near 19.7 feet on early Tuesday
  morning, and fall below flood stage on Wednesday morning.
* At stages near 19.0 feet...Agricultural flooding begins on the 
  South Dakota side of the river. 

&&
 
LAT...LON 4331 9663 4331 9651 4314 9641 4303 9647
          4303 9654 4312 9654

$$

IAC041-221925-
/O.EXT.KFSD.FL.W.0013.000000T0000Z-170523T1400Z/
/SPOI4.1.ER.170521T0707Z.170521T1800Z.170522T1400Z.NO/
1025 AM CDT Sun May 21 2017

...Flood Warning extended until Tuesday May 23... 
The Flood Warning continues for
  The Ocheyedan River Near Spencer.
* until Tuesday morning.
* At 09AM Sunday the stage was 8.4 feet.
* Flood stage is 8.0 feet.
* Forecast...The river will crest near 8.5 feet early Sunday
  afternoon, then fall below flood stage on Monday morning.
* Recent activity...The river rose above flood stage on Sunday May 
  21.
* At stages near 8.0 feet...Minor flooding of pasture land begins. 

&&
 
LAT...LON 4318 9540 4318 9533 4315 9520 4313 9513
          4312 9524 4315 9540

$$

IAC041-221925-
/O.EXT.KFSD.FL.W.0014.000000T0000Z-170524T1600Z/
/SPWI4.1.ER.170521T0030Z.170522T0000Z.170523T1600Z.NO/
1025 AM CDT Sun May 21 2017

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until Wednesday morning.
* At 09AM Sunday the stage was 10.8 feet.
* Flood stage is 10.0 feet.
* Forecast...The river will crest near 11.1 feet on Sunday evening,
  then fall below flood stage on Tuesday.
* Recent activity...The river rose above flood stage on Saturday May 
  20.
* At stages near 10.0 feet...The right bank overflows, and minor 
  flooding of the Spencer city park and some rural agricultural areas
  begins. 

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-221925-
/O.EXT.KFSD.FL.W.0015.170521T1514Z-170527T0600Z/
/LNNI4.1.ER.170521T1215Z.170524T0000Z.170526T0600Z.NO/
1025 AM CDT Sun May 21 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until late Friday night.
* At 10AM Sunday the stage was 18.0 feet.
* Flood stage is 18.0 feet.
* Forecast...The river will crest near 19.0 feet on Tuesday
  evening, then fall below flood stage late Thursday.
* Recent activity...The river rose above flood stage on Sunday May 
  21.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
  flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Maximum Forecast
         Stage  Stage  Time      Stage  Time     
         
BIG SIOUX RIVER
HWDI4    19.0   18.92 Sun 9 AM    19.7  Tue 1 AM   

OCHEYEDAN RIVER
SPOI4     8.0    8.42 Sun 10 AM    8.5  Sun 1 PM    

LITTLE SIOUX RIVER
SPWI4    10.0   10.81 Sun 9 AM    11.1  Sun 7 PM 
LNNI4    18.0   18.05 Sun 10 AM   19.0  Tue 7 PM

914 
WGUS83 KFSD 221458
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
958 AM CDT Mon May 22 2017

...The Flood Warning continues for the following rivers in Iowa...
South Dakota...

  Big Sioux River above Hawarden
  Ocheyedan River Near Spencer
  Little Sioux River At Spencer
  Little Sioux River At Linn Grove
...The Flood Warning continues for the following rivers in Iowa...
  Little Sioux River Near Milford
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
**************************************************** 
......Insert basis section here!!!..... 
 
****************************************************

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC149-167-SDC127-231858-
/O.EXT.KFSD.FL.W.0012.000000T0000Z-170525T0359Z/
/HWDI4.1.ER.170521T1530Z.170523T1200Z.170524T2159Z.UU/
958 AM CDT Mon May 22 2017

...Flood Warning extended until Wednesday May 24... 
The Flood Warning continues for
  The Big Sioux River above Hawarden.
* until Wednesday evening.
* At 09AM Monday the stage was 20.0 feet.
* Flood stage is 19.0 feet.
* Recent activity...The river rose above flood stage on Sunday May 
  21.
* Forecast...The river will crest near 20.4 feet Tuesday morning.  
* At stages near 19.0 feet...Agricultural flooding begins on the 
  South Dakota side of the river. 

&&
 
LAT...LON 4331 9663 4331 9651 4314 9641 4303 9647
          4303 9654 4312 9654

$$

IAC041-231857-
/O.EXT.KFSD.FL.W.0013.000000T0000Z-170525T1800Z/
/SPOI4.1.ER.170521T0707Z.170523T0000Z.170524T1800Z.NO/
958 AM CDT Mon May 22 2017

The Flood Warning continues for
  The Ocheyedan River Near Spencer.
* until Thursday afternoon.
* At 09AM Monday the stage was 9.1 feet.
* Flood stage is 8.0 feet.
* Forecast...The river will crest near 9.2 feet this evening.
* At stages near 9.5 feet...Significant amounts of pasture and other 
  farm land begin flooding. 

&&
 
LAT...LON 4318 9540 4318 9533 4315 9520 4313 9513
          4312 9524 4315 9540

$$

IAC041-059-231857-
/O.CON.KFSD.FL.W.0016.000000T0000Z-000000T0000Z/
/MIFI4.1.ER.170521T0830Z.170522T1415Z.000000T0000Z.NO/
958 AM CDT Mon May 22 2017

The Flood Warning continues for
  The Little Sioux River Near Milford.
* until further notice.
* At 09AM Monday the stage was 12.4 feet.
* Flood stage is 12.0 feet.
* Recent activity...The river rose above flood stage on Sunday May 
  21.
* At stages near 12.0 feet...Minor flooding of low lying agricultural
  lands begins. 

&&
 
LAT...LON 4350 9533 4350 9526 4334 9519 4334 9516
          4328 9517 4329 9524

$$

IAC041-231857-
/O.EXT.KFSD.FL.W.0014.000000T0000Z-170527T0600Z/
/SPWI4.1.ER.170521T0030Z.170523T0600Z.170526T0600Z.NO/
958 AM CDT Mon May 22 2017

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until late Friday night.
* At 09AM Monday the stage was 11.8 feet.
* Flood stage is 10.0 feet.
* Recent activity...The river rose above flood stage on Saturday May 
  20.
* Forecast...The river will crest near 12.0 feet Tuesday morning.

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-231857-
/O.EXT.KFSD.FL.W.0015.000000T0000Z-000000T0000Z/
/LNNI4.1.ER.170521T1215Z.170525T0600Z.000000T0000Z.NO/
958 AM CDT Mon May 22 2017

...Flood Warning extended until further notice... 
The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until further notice.
* At 09AM Monday the stage was 18.4 feet.
* Flood stage is 18.0 feet.
* Forecast...The river will continue rising to near 19.2 feet by 
  Thursday May 25. Additional rises may be possible thereafter.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
  flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Maximum Forecast  Recent Observed
         Stage  Stage  Time      Stage  Time       Crest Time

BIG SIOUX RIVER
HWDI4    19.0   19.98 Mon 9 AM    20.4  Tue 7 AM  

OCHEYEDAN RIVER
SPOI4     8.0    9.08 Mon 10 AM   9.2  Mon 7 PM   

LITTLE SIOUX RIVER
MIFI4    12.0   12.37 Mon 9 AM                     12.4  Mon May 22
SPWI4    10.0   11.78 Mon 9 AM    12.0  Tue 1 AM  
LNNI4    18.0   18.36 Mon 9 AM    19.2  Thu 1 AM  

MG

892 
WGUS83 KFSD 231409
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
909 AM CDT Tue May 23 2017

...The Flood Warning continues for the following rivers in Iowa...
South Dakota...

  Ocheyedan River Near Spencer
  Little Sioux River Near Milford
  Little Sioux River At Spencer
  Little Sioux River At Linn Grove
  Big Sioux River above Hawarden
  Big Sioux River At Akron
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC149-167-SDC127-241809-
/O.CON.KFSD.FL.W.0012.000000T0000Z-170525T0359Z/
/HWDI4.1.ER.170521T1530Z.170523T1145Z.170524T2159Z.UU/
909 AM CDT Tue May 23 2017

The Flood Warning continues for
  The Big Sioux River above Hawarden.
* until Wednesday evening.
* At 08AM Tuesday the stage was 20.3 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 19.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Wednesday May 24.
* At stages near 19.0 feet...Agricultural flooding begins on the 
  South Dakota side of the river. 

&&
 
LAT...LON 4331 9663 4331 9651 4314 9641 4303 9647
          4303 9654 4312 9654

$$

IAC149-SDC127-241809-
/O.EXT.KFSD.FL.W.0017.170523T1452Z-170525T2000Z/
/AKRI4.1.ER.170523T1452Z.170524T0000Z.170524T2000Z.NO/
909 AM CDT Tue May 23 2017

...Flood Warning extended until Thursday May 25... 
The Flood Warning continues for
  The Big Sioux River At Akron.
* until Thursday afternoon.
* At 08AM Tuesday the stage was 15.9 feet.
* Minor flooding is forecast.
* Flood stage is 16.0 feet.
* Forecast...Rise above flood stage Tuesday May 23 and crest near 
  16.2 feet early Wednesday. The river will fall below flood stage
  by late Wednesday May 24.
* At stages near 16.0 feet...Several farm levees are overtopped with 
  significant flooding of agricultural lands. 

&&
 
LAT...LON 4296 9657 4296 9645 4286 9652 4273 9648
          4273 9669 4277 9667

$$

IAC041-241809-
/O.EXT.KFSD.FL.W.0013.000000T0000Z-170525T1000Z/
/SPOI4.1.ER.170521T0707Z.170523T0215Z.170524T1000Z.NO/
909 AM CDT Tue May 23 2017

The Flood Warning continues for
  The Ocheyedan River Near Spencer.
* until late Wednesday night.
* At 08AM Tuesday the stage was 8.7 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 8.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Wednesday May 24.
* At stages near 8.0 feet...Minor flooding of pasture land begins. 

&&
 
LAT...LON 4318 9540 4318 9533 4315 9520 4313 9513
          4312 9524 4315 9540

$$

IAC041-059-241809-
/O.CON.KFSD.FL.W.0016.000000T0000Z-000000T0000Z/
/MIFI4.1.ER.170521T0830Z.170523T1300Z.000000T0000Z.NO/
909 AM CDT Tue May 23 2017

The Flood Warning continues for
  The Little Sioux River Near Milford.
* until further notice.
* At 08AM Tuesday the stage was 12.4 feet.
* Flood stage is 12.0 feet.
* At stages near 12.0 feet...Minor flooding of low lying agricultural
  lands begins. 

&&
 
LAT...LON 4350 9533 4350 9526 4334 9519 4334 9516
          4328 9517 4329 9524

$$

IAC041-241809-
/O.EXT.KFSD.FL.W.0014.000000T0000Z-170527T1500Z/
/SPWI4.1.ER.170521T0030Z.170523T1115Z.170526T1500Z.NO/
909 AM CDT Tue May 23 2017

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until Saturday morning.
* At 08AM Tuesday the stage was 12.2 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 10.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Friday May 26.

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-241809-
/O.EXT.KFSD.FL.W.0015.000000T0000Z-170529T0000Z/
/LNNI4.1.ER.170521T1215Z.170525T1800Z.170528T0000Z.NO/
909 AM CDT Tue May 23 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until Sunday evening.
* At 08AM Tuesday the stage was 18.6 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...The river will crest near 19.2 feet by Thursday May 25. 
  The river will fall below flood stage Saturday May 27.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
  flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Maximum Forecast  Recent Observed
         Stage  Stage  Time      Stage  Time       Crest Time

BIG SIOUX RIVER
HWDI4    19.0   20.30 Tue 8 AM                      20.3  Tue May 23
AKRI4    16.0   15.94 Tue 8 AM    16.2  Tue 7 PM 

OCHEYEDAN RIVER
SPOI4     8.0    8.66 Tue 9 AM                       9.1  Mon May 22

LITTLE SIOUX RIVER
MIFI4    12.0   12.44 Tue 8 AM                      12.5  Tue May 23
SPWI4    10.0   12.19 Tue 8 AM                      12.2  Tue May 23
LNNI4    18.0   18.59 Tue 8 AM    19.2  Thu 1 PM 

MG

421 
WGUS83 KFSD 241422
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
922 AM CDT Wed May 24 2017

...The Flood Warning is cancelled for the following rivers in Iowa...

  Ocheyedan River Near Spencer

...The Flood Warning continues for the following rivers in Iowa...
South Dakota...

  Big Sioux River above Hawarden
  Big Sioux River At Akron
  Little Sioux River Near Milford
  Little Sioux River At Spencer
  Little Sioux River At Linn Grove
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC149-167-SDC127-251200-
/O.EXT.KFSD.FL.W.0012.000000T0000Z-170525T1200Z/
/HWDI4.1.ER.170521T1530Z.170523T1145Z.170525T0600Z.UU/
922 AM CDT Wed May 24 2017

The Flood Warning continues for
  The Big Sioux River above Hawarden.
* until Thursday morning.
* At 08AM Wednesday the stage was 19.9 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 19.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Thursday May 25.
* At stages near 19.0 feet...Agricultural flooding begins on the 
  South Dakota side of the river. 

&&
 
LAT...LON 4331 9663 4331 9651 4314 9641 4303 9647
          4303 9654 4312 9654

$$

IAC149-SDC127-251821-
/O.EXT.KFSD.FL.W.0017.000000T0000Z-170526T0000Z/
/AKRI4.1.ER.000000T0000Z.170524T0445Z.170525T0000Z.NO/
922 AM CDT Wed May 24 2017

...Flood Warning extended until Thursday May 25... 
The Flood Warning continues for
  The Big Sioux River At Akron.
* until Thursday evening.
* At 09AM Wednesday the stage was 16.0 feet.
* Flood stage is 16.0 feet.
* Forecast...The river will continue to fall to below flood stage 
  late on Wednesday May 24.
* At stages near 16.0 feet...Several farm levees are overtopped with 
significant flooding of agricultural lands. 

&&
 
LAT...LON 4296 9657 4296 9645 4286 9652 4273 9648
          4273 9669 4277 9667

$$

IAC041-059-251821-
/O.CON.KFSD.FL.W.0016.000000T0000Z-000000T0000Z/
/MIFI4.1.ER.170521T0830Z.170524T1200Z.000000T0000Z.NO/
922 AM CDT Wed May 24 2017

The Flood Warning continues for
  The Little Sioux River Near Milford.
* until further notice.
* At 08AM Wednesday the stage was 12.5 feet.
* Flood stage is 12.0 feet.
* At stages near 12.0 feet...Minor flooding of low lying agricultural
  lands begins. 

&&
 
LAT...LON 4350 9533 4350 9526 4334 9519 4334 9516
          4328 9517 4329 9524

$$

IAC041-251821-
/O.CON.KFSD.FL.W.0014.000000T0000Z-170527T1500Z/
/SPWI4.1.ER.170521T0030Z.170523T1115Z.170526T1500Z.NO/
922 AM CDT Wed May 24 2017

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until Saturday morning.
* At 08AM Wednesday the stage was 11.9 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 10.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Friday May 26.

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-251821-
/O.EXT.KFSD.FL.W.0015.000000T0000Z-170529T1200Z/
/LNNI4.1.ER.170521T1215Z.170526T0600Z.170528T1200Z.NO/
922 AM CDT Wed May 24 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until Monday morning.
* At 09AM Wednesday the stage was 18.8 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...The river will crest near 19.1 feet by Friday May 26. 
  The river will fall below flood stage Sunday May 28.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
  flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

IAC041-241452-
/O.CAN.KFSD.FL.W.0013.000000T0000Z-170525T1000Z/
/SPOI4.1.ER.170521T0707Z.170523T0215Z.170524T1005Z.NO/
922 AM CDT Wed May 24 2017

The Flood Warning is cancelled for
  The Ocheyedan River Near Spencer.
* At 08AM Wednesday the stage was 7.9 feet.
* Flood stage is 8.0 feet.
* Recent activity...The river fell below flood stage at Wednesday May
  24.
* Forecast...The river will continue to fall to 7.0 feet by 7 AM 
  Thursday.
* At stages near 8.0 feet...Minor flooding of pasture land begins. 

&&
 
LAT...LON 4318 9540 4318 9533 4315 9520 4313 9513
          4312 9524 4315 9540

$$

&& 
Location Flood  Latest Observed  Maximum Forecast  Recent Observed
         Stage  Stage  Time      Stage  Time       Crest Time

BIG SIOUX RIVER
HWDI4    19.0   19.89 Wed 8 AM                     20.3  Tue May 23
AKRI4    16.0   16.02 Wed 9 AM                     16.1  Tue May 23

LITTLE SIOUX RIVER
MIFI4    12.0   12.53 Wed 8 AM                     12.6  Wed May 24
SPWI4    10.0   11.88 Wed 8 AM                     12.2  Tue May 23
LNNI4    18.0   18.75 Wed 9 AM    19.1  Fri 1 AM 

OCHEYEDAN RIVER
SPOI4     8.0    7.89 Wed 9 AM                      9.1  Mon May 22

MG

699 
WGUS83 KFSD 251440
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
940 AM CDT Thu May 25 2017

...The Flood Warning continues for the following rivers in Iowa...

  Little Sioux River Near Milford
  Little Sioux River At Spencer
  Little Sioux River At Linn Grove
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC041-059-261840-
/O.CON.KFSD.FL.W.0016.000000T0000Z-000000T0000Z/
/MIFI4.1.ER.170521T0830Z.170524T1200Z.000000T0000Z.NO/
940 AM CDT Thu May 25 2017

The Flood Warning continues for
  The Little Sioux River Near Milford.
* until further notice.
* At 08AM Thursday the stage was 12.5 feet.
* Minor flooding is occurring.
* Flood stage is 12.0 feet.
* At stages near 12.0 feet...Minor flooding of low lying agricultural
  lands begins. 

&&
 
LAT...LON 4350 9533 4350 9526 4334 9519 4334 9516
          4328 9517 4329 9524

$$

IAC041-261840-
/O.EXT.KFSD.FL.W.0014.000000T0000Z-170529T0000Z/
/SPWI4.1.ER.170521T0030Z.170523T1115Z.170528T0000Z.NO/
940 AM CDT Thu May 25 2017

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until Sunday evening.
* At 08AM Thursday the stage was 11.4 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 10.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Saturday May 27.
* At stages near 10.0 feet...The right bank overflows, and minor 
  flooding of the Spencer city park and some rural agricultural areas 
  begins. 

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-261840-
/O.EXT.KFSD.FL.W.0015.000000T0000Z-000000T0000Z/
/LNNI4.1.ER.170521T1215Z.170525T0900Z.000000T0000Z.NO/
940 AM CDT Thu May 25 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until further notice.
* At 09AM Thursday the stage was 18.9 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...The river is near crest now.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
  flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Recent Observed
         Stage  Stage  Time      Crest Time

LITTLE SIOUX RIVER
MIFI4    12.0   12.53 Thu 8 AM   12.6  Wed May 24
SPWI4    10.0   11.44 Thu 8 AM   12.2  Tue May 23
LNNI4    18.0   18.88 Thu 9 AM   18.9  Thu May 25

MG

846 
WGUS83 KFSD 261421
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
921 AM CDT Fri May 26 2017

...The Flood Warning continues for the following rivers in Iowa...

  Little Sioux River At Spencer
  Little Sioux River Near Milford
  Little Sioux River At Linn Grove
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC041-059-271821-
/O.CON.KFSD.FL.W.0016.000000T0000Z-000000T0000Z/
/MIFI4.1.ER.170521T0830Z.170524T1200Z.000000T0000Z.NO/
921 AM CDT Fri May 26 2017

The Flood Warning continues for
  The Little Sioux River Near Milford.
* until further notice.
* At 8AM Friday the stage was 12.2 feet.
* Minor flooding is occurring. 
* Flood stage is 12.0 feet.
* At stages near 12.0 feet...Minor flooding of low lying agricultural
lands begins. 

&&
 
LAT...LON 4350 9533 4350 9526 4334 9519 4334 9516
          4328 9517 4329 9524

$$

IAC041-271821-
/O.EXT.KFSD.FL.W.0014.000000T0000Z-170530T0000Z/
/SPWI4.1.ER.170521T0030Z.170523T1115Z.170529T0000Z.NO/
921 AM CDT Fri May 26 2017

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until Monday evening.
* At 8AM Friday the stage was 11.1 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 10.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Sunday May 28.
* At stages near 10.0 feet...The right bank overflows, and minor 
flooding of the Spencer city park and some rural agricultural areas 
begins. 

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-271821-
/O.CON.KFSD.FL.W.0015.000000T0000Z-000000T0000Z/
/LNNI4.1.ER.170521T1215Z.170526T1230Z.000000T0000Z.NO/
921 AM CDT Fri May 26 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until further notice.
* At 9AM Friday the stage was 18.9 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...The river will continue rising to near 18.9 feet by 
  Friday May 26. Additional rises may be possible thereafter.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Recent Observed
         Stage  Stage  Time      Crest Time

LITTLE SIOUX RIVER
MIFI4    12.0   12.21 Fri 8 AM   12.6  Wed May 24
SPWI4    10.0   11.13 Fri 8 AM   12.2  Tue May 23
LNNI4    18.0   18.87 Fri 9 AM   18.9  Fri May 26

BA

027 
WGUS83 KFSD 271415
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
915 AM CDT Sat May 27 2017

...The Flood Warning continues for the following rivers in Iowa...

  Little Sioux River At Linn Grove
  Little Sioux River At Spencer
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC041-281815-
/O.CON.KFSD.FL.W.0014.000000T0000Z-170530T0000Z/
/SPWI4.1.ER.170521T0030Z.170523T1115Z.170529T0000Z.NO/
915 AM CDT Sat May 27 2017

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until Monday evening.
* At 8AM Saturday the stage was 10.7 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 10.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Sunday May 28.
* At stages near 10.0 feet...The right bank overflows, and minor 
flooding of the Spencer city park and some rural agricultural areas 
begins. 

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-281815-
/O.EXT.KFSD.FL.W.0015.000000T0000Z-170601T0000Z/
/LNNI4.1.ER.170521T1215Z.170526T1230Z.170531T0000Z.NO/
915 AM CDT Sat May 27 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until Wednesday evening.
* At 9AM Saturday the stage was 18.8 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Tuesday May 30.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Recent Observed
         Stage  Stage  Time      Crest Time

LITTLE SIOUX RIVER
SPWI4    10.0   10.70 Sat 8 AM   12.2  Tue May 23
LNNI4    18.0   18.76 Sat 9 AM   18.9  Fri May 26

BA

856 
WGUS83 KFSD 281342
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
842 AM CDT Sun May 28 2017

...The Flood Warning continues for the following rivers in Iowa...

  Little Sioux River At Spencer
  Little Sioux River At Linn Grove
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC041-291742-
/O.EXT.KFSD.FL.W.0014.000000T0000Z-170530T1200Z/
/SPWI4.1.ER.170521T0030Z.170523T1115Z.170529T1200Z.NO/
842 AM CDT Sun May 28 2017

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until Tuesday morning.
* At 7AM Sunday the stage was 10.3 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 10.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Monday May 29.
* At stages near 10.0 feet...The right bank overflows, and minor 
flooding of the Spencer city park and some rural agricultural areas 
begins. 

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-291742-
/O.CON.KFSD.FL.W.0015.000000T0000Z-170601T0000Z/
/LNNI4.1.ER.170521T1215Z.170526T1230Z.170531T0000Z.NO/
842 AM CDT Sun May 28 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until Wednesday evening.
* At 8AM Sunday the stage was 18.6 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Tuesday May 30.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Recent Observed
         Stage  Stage  Time      Crest Time

LITTLE SIOUX RIVER
SPWI4    10.0   10.32 Sun 7 AM   12.2  Tue May 23
LNNI4    18.0   18.60 Sun 8 AM   18.9  Fri May 26

BA

474 
WGUS83 KFSD 291313
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
813 AM CDT Mon May 29 2017

...The Flood Warning is cancelled for the following rivers in Iowa...

  Little Sioux River At Spencer
...The Flood Warning continues for the following rivers in Iowa...

  Little Sioux River At Linn Grove
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC041-291343-
/O.CAN.KFSD.FL.W.0014.000000T0000Z-170530T1200Z/
/SPWI4.1.ER.170521T0030Z.170523T1115Z.170529T1121Z.NO/
813 AM CDT Mon May 29 2017

The Flood Warning is cancelled for
  The Little Sioux River At Spencer.
* At 07AM Monday the stage was 9.9 feet.
* Flood stage is 10.0 feet.
* Recent activity...The river fell below flood stage on Monday May 
  29.
* Forecast...The river will continue to fall to 9.6 feet by 7 AM 
  Tuesday.
* At stages near 10.0 feet...The right bank overflows, and minor 
flooding of the Spencer city park and some rural agricultural areas 
begins. 

&&
 
LAT...LON 4315 9518 4315 9512 4315 9505 4299 9503
          4302 9510 4310 9510

$$

IAC021-041-301713-
/O.EXT.KFSD.FL.W.0015.000000T0000Z-170601T0600Z/
/LNNI4.1.ER.170521T1215Z.170526T1230Z.170531T0600Z.NO/
813 AM CDT Mon May 29 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until late Wednesday night.
* At 08AM Monday the stage was 18.4 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Wednesday May 31.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed   Recent Observed
         Stage  Stage  Time       Crest  Time

LITTLE SIOUX RIVER
SPWI4    10.0    9.90 Mon 7 AM    12.2  Tue May 23
LNNI4    18.0   18.37 Mon 8 AM    18.9  Fri May 26

082 
WGUS83 KFSD 301412
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
912 AM CDT Tue May 30 2017

...The Flood Warning continues for the following rivers in Iowa...
  Little Sioux River At Linn Grove
 
.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest 
forecasts. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. the water 
depth and road condition may be unsafe.

Additional information is available at 
 
http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

The next scheduled statement will be issued tomorrow morning.

&&

IAC021-041-311812-
/O.CON.KFSD.FL.W.0015.000000T0000Z-170601T0600Z/
/LNNI4.1.ER.170521T1215Z.170526T1230Z.170531T0600Z.NO/
912 AM CDT Tue May 30 2017

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until late Wednesday night.
* At 09AM Tuesday the stage was 18.2 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast...The river will continue to fall to below flood stage by 
  Wednesday May 31.
* At stages near 18.5 feet...The city park in Sioux Rapids is 
  flooded. 

&&
 
LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
          4296 9543 4293 9520

$$

&& 
Location Flood  Latest Observed  Recent Observed
         Stage  Stage  Time      Crest Time

LITTLE SIOUX RIVER
LNNI4    18.0   18.16 Tue 9 AM   18.9  Fri May 26

MG

620
WGUS83 KFSD 312032
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
332 PM CDT Wed May 31 2017

...The Flood Warning is cancelled for the following rivers in Iowa...

Little Sioux River At Linn Grove

.The following river forecasts include forecast precipitation through
tonight. Any additional future rains could affect the crest
forecasts.

With no significant rainfall since May 22, the Little Sioux River at Linn Grove finally dropped below flood stage late this morning. It should continue to slowly fall the next few days, unless additional heavy rain occurs later this week or weekend, which could cause it to approach flood stage again.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Safety message...Do not drive cars through flooded areas. The water
depth and road condition may be unsafe.

Additional information is available at

http://water.weather.gov/ahps2/index.php?wfo=fsd

Stay tuned for further updates by listening to NOAA weather radio...
or your local radio and TV stations.

IAC021-041-312102-
/O.CAN.KFSD.FL.W.0015.000000T0000Z-170601T0600Z/
/LNNI4.1.ER.170521T1215Z.170526T1230Z.170531T1400Z.NO/
332 PM CDT Wed May 31 2017

The Flood Warning is cancelled for
The Little Sioux River At Linn Grove.
* At 3 PM Wednesday the stage was 17.9 feet.
* Flood stage is 18.0 feet.
* Recent activity...The river fell below flood stage
around 10 AM on Wednesday May 31.
* Forecast...The river will continue to fall to 17.8 feet
by 7 AM Thursday.
* At stages near 18.5 feet...The city park in Sioux Rapids
is flooded.

LAT...LON 4302 9510 4299 9503 4287 9512 4288 9536
4296 9543 4293 9520

&&
Location Flood Latest Observed Recent Observed
Stage Stage Time Crest Time

LITTLE SIOUX RIVER
LNNI4 18.0 17.93 Wed 3 PM 18.9 Fri May 26

TRM

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 Sioux Falls, SD wrote its last area forecast discussion before this river flood warning went out at May 20, 6:57 PM CDT, 2 hours 22 minutes earlier.

Area forecast discussion, May 20, 6:57 PM CDT, 2 hours 22 minutes before

Area Forecast Discussion
National Weather Service Sioux Falls SD
657 PM CDT Sat May 20 2017

.SHORT TERM...(This evening through Sunday)
Issued at 413 PM CDT Sat May 20 2017

Low pressure center is presently located over west central IA this
afternoon, with a dry slot pushing into our northwestern IA zones at
this time. Back to the north and west, scattered showers continue
across the area. The low pressure will slide to the northeast
overnight, becoming situated over western Wisconsin by Sunday
morning. For this evening, the shower threat will continue across
the area, focused mainly through the James River Valley and Highway
14 corridor in association with a trowal wrapping around to the
north and west of the low. While there have not been any lightning
strikes for several hours in our area, did leave in isolated thunder
in portions of northwestern IA and southwestern MN through the
evening with weak instability (CAPE values of 100 to 200 j/kg) over
that area.

Later tonight, will see diminishing shower chances from west to east
as the low pulls away, though clouds will hold over most of the
area. Thermal profiles support a little snow possibly mixing in with
any lingering rain over the central Highway 14 corridor after 06Z
tonight, though surface temperatures will remain in the upper 30s
over that area so not looking at any accumulation. Northwesterly
winds will stay in the 10 to 15 kt range tonight, and lows will run
in the upper 30s to lower 40s.

Clouds will be slow to clear on Sunday, especially in the east, and
cannot rule out isolated shower chances remaining in our far
southwestern MN zones as the upper level low spins over the Upper
Mississippi Valley. Gusty northwest winds will remain through the
day, and while we will have warming temperatures, readings will be
below normal with highs only lower 50s over southwestern MN where
clouds will persist, to as warm as the mid 60s through the James
River Valley where some sun is expected in the afternoon.

.LONG TERM...(Sunday night through Saturday)
Issued at 413 PM CDT Sat May 20 2017

Deep trough circulating across Minnesota as it wraps up Sunday
night.  While is does dry out at lower levels as flow turns
southwest and westerly, indications are that there could be more mid-
level clouds than expected as weak lobe rotates through southwest MN
during the evening, and maybe even enough for passing couple of
sprinkles or light showers.

Main precipitation chance in intermediate range begins Monday, as
more coherent lobe swings around the deep Minnesota trough across
the Dakotas and Nebraska.  Most solutions are showing at least a
small degree of splitting to dynamics, but with weak stability
there should be a good response to the most minimal forcing, and
supportive of likely PoPs over much of the area during the afternoon.
Still potential for 500-800 J/kg MLCAPE, with weaker shear largely
in a linear mode. Not out of the question that parameters could be
briefly stronger near convergence boundary as it pushes across
northwest Iowa and extreme northeast Nebraska during the afternoon,
but probably not enough for more than the most minimal threat for a
stronger storm.

Wave takes with it the precipitation chance during the evening, and
should remain fairly quiet other than increasing northerly winds
Monday night.  Final strong lobe will wrap southward on Tuesday,
with impacts to be largely felt east of the James River, as
precipitation coverage is enhanced along with the diurnal cycle.
Instability does not look strong, but could see an isolated rumble
around northwest Iowa and adjacent areas from midday through the
afternoon.

Moisture wrapping around the upper low should again bring a diurnal
cloud increase to areas around northwest Iowa on Wednesday, but
enough subsidence with folding upper ridge to keep a lid on shower
development this far north/west.  As upper ridge axis shifts across
the area toward mid to late week, Thursday should be the most
pleasant day of the week with temperatures moderating back to
near/above normal, perhaps diminished in quality a bit by breezy
southerly winds.

Upper ridge begins to be knocked down by wave toward the end of the
week, with EC quicker than Canadian/GFS. Regardless, should see a
push of steeper mid-level lapse rates along with wave sliding up the
ridge, for a threat for elevated showers/thunderstorms pushing
northeast across the area, followed by additional precipitation
changes around a frontal passage around Saturday. Temperatures
Friday into Saturday should remain near/above normal.

&&

.AVIATION...(For the 00Z TAFS through 00Z Sunday evening)
Issued at 640 PM CDT Sat May 20 2017

Light rain and drizzle will continue to slowly rotate through the
region through the overnight hours. A mixture of MVFR...IFR and
some spotty low end VFR conditions are expected. Ceilings will
drop as low as 800 ft agl with visibility as low as 2 miles at
times. Conditions will begin improving late tonight through Sunday
morning, with ceilings lifting or becoming scattered at all three
TAF sites through mid afternoon Sunday.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
IA...None.
NE...None.
&&

SHORT TERM...JM
LONG TERM...Chapman
AVIATION...

Hazardous weather outlook, May 20, 4:32 AM CDT, 16 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
432 AM CDT Sat May 20 2017

IAZ001-002-012-MNZ080-081-089-090-098-NEZ013-SDZ067-070-071-
210945-
Lyon IA-Osceola-Sioux-Murray-Cottonwood-Nobles-Jackson-Rock-Dixon-
Lincoln SD-Clay SD-Union-
432 AM CDT Sat May 20 2017

This Hazardous Weather Outlook is for portions of northwest Iowa,
southwest Minnesota, northeast Nebraska, and southeast South
Dakota.

.DAY ONE...Today and Tonight

There is a chance for a few thunderstorms today embedded in shower
activity. If thunderstorms occur, they will not be severe.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

IAZ003-013-014-020>022-031-032-NEZ014-210945-
Dickinson-O'Brien-Clay IA-Plymouth-Cherokee-Buena Vista-Woodbury-
Ida-Dakota-
432 AM CDT Sat May 20 2017

This Hazardous Weather Outlook is for portions of northwest Iowa,
west central Iowa, and northeast Nebraska.

.DAY ONE...Today and Tonight

There is a chance for a few thunderstorms today embedded in shower
activity. If thunderstorms occur, they will not be severe.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

A few storms may be marginally severe Monday afternoon as a cold
front moves through.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

MNZ071-072-097-SDZ038>040-050-052>066-068-069-210945-
Lincoln MN-Lyon MN-Pipestone-Beadle-Kingsbury-Brookings-Gregory-
Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-
McCook-Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-
Yankton-
432 AM CDT Sat May 20 2017

This Hazardous Weather Outlook is for portions of southwest
Minnesota, central South Dakota, east central South Dakota, south
central South Dakota, and southeast South Dakota.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 9:19 PM CDT	River Flood Warning	FSD	Plymouth, Sioux	4 days
May 20, 9:19 PM CDT	River Flood Warning	FSD	Clay	4 days
May 20, 9:19 PM CDT	River Flood Warning	FSD	Clay	8 days
May 21, 10:13 AM CDT	River Flood Warning	FSD	Clay, Dickinson	6 days

Nearby

River Flood Warnings in Iowa, 2017 Every river flood warning in 2017

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.