Flood Statement
Issued by NWS Sioux Falls, SD

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000
WGUS83 KFSD 181515
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
1015 AM CDT Wed Apr 18 2018

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

  Big Sioux River Near Brookings
  Big Sioux River Near Dell Rapids
  Big Sioux River At Sioux Falls I-90
  Big Sioux River above Hawarden
  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.

The snow pack from the recent storms will begin melting later this week
as temperatures finally begin to warm up, and runoff from this snow melt
will cause significant rises on the area rivers and streams. With a fairly
slow melt through the early to middle parts of next week, flooding is
still expected to remain minor for most areas.

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.

&&

SDC011-101-191914-
/O.EXT.KFSD.FL.W.0049.180421T1600Z-180428T0000Z/
/BRKS2.2.ER.180421T1600Z.180423T1200Z.180427T0000Z.NO/
1015 AM CDT Wed Apr 18 2018

The Flood Warning continues for
  The Big Sioux River Near Brookings.
* from Saturday morning to Friday April 27.
* At 09AM Wednesday the stage was 8.1 feet.
* Moderate flooding is forecast.
* Flood stage is 9.0 feet.
* Forecast...Rise above flood stage on Saturday and crest near
  10.6 feet on Monday.
* At stages near 10.3 feet...473rd Avenue north of the gauge begins to
  flood.

&&

LAT...LON 4432 9692 4432 9685 4421 9675 4414 9661
          4410 9665 4420 9683

$$

SDC099-101-191914-
/O.EXT.KFSD.FL.W.0050.180422T0430Z-180428T0000Z/
/DERS2.1.ER.180422T0430Z.180423T1800Z.180427T0000Z.NO/
1015 AM CDT Wed Apr 18 2018

The Flood Warning continues for
  The Big Sioux River Near Dell Rapids.
* from Saturday evening to Friday April 27.
* At 09AM Wednesday the stage was 8.1 feet.
* Minor flooding is forecast.
* Flood stage is 12.0 feet.
* Forecast...Rise above flood stage by Sunday and crest near
  13.1 feet on Tuesday.
* At stages near 14.0 feet...Significant amounts of agricultural
  lands are flooded through the basin.

&&

LAT...LON 4394 9673 4394 9665 4379 9665 4379 9672
          4370 9672 4370 9679

$$

SDC099-191914-
/O.EXT.KFSD.FL.W.0051.180421T0200Z-000000T0000Z/
/SFLS2.1.ER.180421T0200Z.180423T1800Z.000000T0000Z.NO/
1015 AM CDT Wed Apr 18 2018

The Flood Warning continues for
  The Big Sioux River At Sioux Falls I-90.
* from Friday evening until further notice.
* At 09AM Wednesday the stage was 10.9 feet.
* Minor flooding is forecast.
* Flood stage is 12.0 feet.
* Forecast...Rise above flood stage by Friday and crest near
  13.7 feet on Monday.
* At stages near 14.0 feet...Some farm buildings between Renner and
  Sioux Falls are threatened by high water.

&&

LAT...LON 4370 9679 4370 9672 4361 9674 4360 9674
          4360 9676 4366 9676

$$

IAC149-167-SDC127-191914-
/O.EXT.KFSD.FL.W.0052.180422T1000Z-000000T0000Z/
/HWDI4.1.ER.180422T1000Z.180425T0000Z.000000T0000Z.UU/
1015 AM CDT Wed Apr 18 2018

The Flood Warning continues for
  The Big Sioux River above Hawarden.
* from late Saturday night until further notice.
* At 09AM Wednesday the stage was 18.9 feet.
* Minor flooding is forecast.
* Flood stage is 20.5 feet.
* Forecast...Rise above flood stage by Sunday and crest near
  23.2 feet by Tuesday.
* At stages near 23.0 feet...South Dakota Highway 46 begins to flood.

&&

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

$$

IAC041-059-191914-
/O.CON.KFSD.FL.W.0048.000000T0000Z-000000T0000Z/
/MIFI4.2.ER.180414T0621Z.180416T0200Z.000000T0000Z.NO/
1015 AM CDT Wed Apr 18 2018

The Flood Warning continues for
  The Little Sioux River Near Milford.
* until further notice.
* At 09AM Wednesday the stage was 12.2 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

$$

IAC041-191914-
/O.CON.KFSD.FL.W.0046.000000T0000Z-000000T0000Z/
/SPWI4.1.ER.180414T0415Z.180423T1800Z.000000T0000Z.NO/
1015 AM CDT Wed Apr 18 2018

The Flood Warning continues for
  The Little Sioux River At Spencer.
* until further notice.
* At 09AM Wednesday 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 crest near 12.6 feet by Monday.
* At stages near 14.0 feet...City sewers in Spencer can begin to back
  up. Highway 18 between Spencer and Dickens can start flooding if
  flows on the tributary creeks are also very high.

&&

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

$$

IAC021-041-191914-
/O.CON.KFSD.FL.W.0047.000000T0000Z-000000T0000Z/
/LNNI4.1.ER.180418T0405Z.180425T1800Z.000000T0000Z.NO/
1015 AM CDT Wed Apr 18 2018

The Flood Warning continues for
  The Little Sioux River At Linn Grove.
* until further notice.
* At 09AM Wednesday the stage was 18.1 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 18.0 feet.
* Recent activity...The river rose above flood stage on Tuesday April
  17.
* Forecast...The river will crest near 19.2 feet by Wednesday
  April 25.
* 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
BRKS2     9.0    8.09 Wed 10 AM   10.6  Mon Apr 23
DERS2    12.0    8.14 Wed 10 AM   13.1  Mon Apr 23
SFLS2    12.0   10.95 Wed 9 AM    13.7  Mon Apr 23
HWDI4    20.5   18.92 Wed 9 AM    23.2  Tue Apr 24

LITTLE SIOUX RIVER
MIFI4    12.0   12.25 Wed 9 AM                      15.3  Sun Apr 15
SPWI4    10.0   11.37 Wed 9 AM    12.6  Mon Apr 23
LNNI4    18.0   18.12 Wed 9 AM    19.2  Wed Apr 25

MG



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