Alert archive / Iowa / River Flood Warnings in 2023
River Flood Warning 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this river flood warning at Mar 29, 2023, 2:39 PM CDT for Dickinson County, Iowa. It took effect at Mar 31, 2023, 10:00 AM CDT. It was in force for 8 days.
The area
The outline as issued.
The facts
- Issued
- Mar 29, 2023, 2:39 PM CDT (19:39 UTC)
- In effect from
- Mar 31, 2023, 10:00 AM CDT
- Expired
- Apr 8, 2023, 11:38 AM CDT
- In force
- 8 days
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- Minor
County Dickinson County, IA
The radar
The Sioux Falls radar (KFSD), 124 km from the middle of the area, began a volume at 19:39 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 near Milford (MIFI4).
- Action stage
- 11 ft
- Minor stage
- 13 ft
- Moderate stage
- 16 ft
- Major stage
- 20 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.
567
WGUS43 KFSD 291939
FLWFSD
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Sioux Falls SD
239 PM CDT Wed Mar 29 2023
...The National Weather Service in Sioux Falls SD has issued a Flood
Warning for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson 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 Thursday afternoon at 445 PM CDT.
&&
IAC059-302145-
/O.NEW.KFSD.FL.W.0004.230331T1500Z-000000T0000Z/
/MIFI4.1.RS.230331T1500Z.230403T0600Z.000000T0000Z.NO/
239 PM CDT Wed Mar 29 2023
...FLOOD WARNING IN EFFECT FROM FRIDAY MORNING UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...From Friday morning until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 1:00 PM CDT Wednesday the stage was 11.3 feet.
- Forecast...The river is expected to rise above flood stage by
midday Friday and to crest near 13.7 ft on Monday. Additional
rises are possible thereafter. The timing and magnitude of
the crest will be highly dependent on the amount of rain
received late Thursday into Friday.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Thu Fri Sat
Little Sioux River
Milford 12.0 11.3 Wed 1 pm 11.4 12.2 13.1
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Kalin19 follow-up statements
880
WGUS83 KFSD 300053
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
753 PM CDT Wed Mar 29 2023
...The Flood Warning is extended for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued Thursday evening at 1000 PM CDT.
&&
IAC059-310300-
/O.EXT.KFSD.FL.W.0004.230331T1912Z-000000T0000Z/
/MIFI4.1.RS.230331T1912Z.230403T0600Z.000000T0000Z.NO/
753 PM CDT Wed Mar 29 2023
...FLOOD WARNING NOW IN EFFECT FROM FRIDAY AFTERNOON UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...From Friday afternoon until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 7:00 PM CDT Wednesday the stage was 11.4 feet.
- Forecast...The river is expected to rise to a crest of 13.8
feet early Monday morning. Additional rises are possible
thereafter.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 pm CDT)
Location Stg Stg Day/Time Thu Fri Sat
Little Sioux River
Milford 12.0 11.4 Wed 7 pm 11.4 12.6 13.2
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Rogers809
WGUS83 KFSD 301534
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
1034 AM CDT Thu Mar 30 2023
...The Flood Warning is extended for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson 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 Friday afternoon at 1230 PM CDT.
&&
IAC059-311745-
/O.EXT.KFSD.FL.W.0004.230331T1200Z-000000T0000Z/
/MIFI4.1.RS.230331T1200Z.230404T0000Z.000000T0000Z.NO/
1034 AM CDT Thu Mar 30 2023
...FLOOD WARNING NOW IN EFFECT FROM FRIDAY MORNING UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...From Friday morning until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 9:00 AM CDT Thursday the stage was 11.5 feet.
- Forecast...The river is expected to rise above flood stage
tomorrow morning and continue rising to 13.9 feet Monday
evening. Additional rises are possible thereafter. The
magnitude and timing of rises will be impacted by the amount
of rain that falls late Thursday into Friday.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Fri Sat Sun
Little Sioux River
Milford 12.0 11.5 Thu 9 am 12.4 13.2 13.7
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Kalin498
WGUS83 KFSD 310103
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
803 PM CDT Thu Mar 30 2023
...The Flood Warning is extended for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued Friday evening at 1015 PM CDT.
&&
IAC059-010315-
/O.EXT.KFSD.FL.W.0004.230331T2000Z-000000T0000Z/
/MIFI4.1.RS.230331T2000Z.230405T0000Z.000000T0000Z.NO/
803 PM CDT Thu Mar 30 2023
...FLOOD WARNING NOW IN EFFECT FROM FRIDAY AFTERNOON UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...From Friday afternoon until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 7:00 PM CDT Thursday the stage was 11.4 feet.
- Forecast...The river is expected to rise above flood stage
tomorrow afternoon and continue rising to 13.4 feet Tuesday
evening. Additional rises are possible thereafter.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 pm CDT)
Location Stg Stg Day/Time Fri Sat Sun
Little Sioux River
Milford 12.0 11.4 Thu 7 pm 12.2 12.6 12.9
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Dux359
WGUS83 KFSD 311400
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
900 AM CDT Fri Mar 31 2023
...The Flood Warning is extended for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson 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 Saturday morning at 1100 AM CDT.
&&
IAC059-011600-
/O.EXT.KFSD.FL.W.0004.230331T1800Z-000000T0000Z/
/MIFI4.1.RS.230331T1800Z.230403T1800Z.000000T0000Z.NO/
900 AM CDT Fri Mar 31 2023
...FLOOD WARNING NOW IN EFFECT FROM THIS AFTERNOON UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...From this afternoon until further notice.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 8:00 AM CDT Friday the stage was 11.7 feet.
- Forecast...The river will rise above flood stage this
afternoon before eventually reaching 12.9 feet Tuesday
morning. It will then fall gradually but remain above flood
stage.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 am CDT)
Location Stg Stg Day/Time Sat Sun Mon
Little Sioux River
Milford 12.0 11.7 Fri 8 am 12.6 12.6 12.8
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$776
WGUS83 KFSD 311858
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
158 PM CDT Fri Mar 31 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued Saturday afternoon at 400 PM CDT.
&&
IAC059-012100-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.RS.230401T1200Z.230404T0000Z.000000T0000Z.NO/
158 PM CDT Fri Mar 31 2023
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 1:00 PM CDT Friday the stage was 11.8 feet.
- Forecast...The river is expected to rise above flood stage by
tomorrow morning and continue rising to a crest of 12.7 feet
Monday evening. Additional rises may be possible into the
middle to later part of next week.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Sat Sun Mon
Little Sioux River
Milford 12.0 11.8 Fri 1 pm 12.1 12.4 12.6
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Kalin495
WGUS83 KFSD 010150
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
850 PM CDT Fri Mar 31 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson 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 Saturday evening at 1100 PM CDT.
&&
IAC059-020400-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.RS.230401T1200Z.230404T0000Z.000000T0000Z.NO/
850 PM CDT Fri Mar 31 2023
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 7:00 PM CDT Friday the stage was 11.9 feet.
- Forecast...The river is expected to rise above flood stage
tomorrow morning, and continue rising to a crest of 12.7 feet
Monday evening. Additional rises may be possible into the
middle to later part of next week.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 pm CDT)
Location Stg Stg Day/Time Sat Sun Mon
Little Sioux River
Milford 12.0 11.9 Fri 7 pm 12.2 12.5 12.7
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
JH607
WGUS83 KFSD 011412
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
912 AM CDT Sat Apr 1 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued Sunday morning at 1115 AM CDT.
&&
IAC059-021615-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.RS.230401T0800Z.230404T0000Z.000000T0000Z.NO/
912 AM CDT Sat Apr 1 2023
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 8:00 AM CDT Saturday the stage was 11.9 feet.
- Forecast...The river is expected to remain near flood stage
today, and then continue rising to a crest of 12.6 feet
Monday evening.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 am CDT)
Location Stg Stg Day/Time Sun Mon Tue
Little Sioux River
Milford 12.0 11.9 Sat 8 am 12.1 12.5 12.6
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Masters820
WGUS83 KFSD 021451
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
951 AM CDT Sun Apr 2 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson 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 Monday morning at 1145 AM CDT.
&&
IAC059-031700-
/O.EXT.KFSD.FL.W.0004.000000T0000Z-230408T0600Z/
/MIFI4.1.RS.230401T0800Z.230403T0000Z.230407T0600Z.NO/
951 AM CDT Sun Apr 2 2023
...FLOOD WARNING NOW IN EFFECT UNTIL EARLY SATURDAY MORNING...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until early Saturday morning.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 8:00 AM CDT Sunday the stage was 12.4 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 8:00 AM CDT Sunday was 12.4 feet.
- Forecast...The river is expected to rise to a crest of 12.5
feet this evening. It will then fall below flood stage early
Friday morning.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 am CDT)
Location Stg Stg Day/Time Mon Tue Wed
Little Sioux River
Milford 12.0 12.4 Sun 8 am 12.5 12.5 12.4
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Masters397
WGUS83 KFSD 030127
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
827 PM CDT Sun Apr 2 2023
...The Flood Warning is extended for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued Monday.
&&
IAC059-040330-
/O.EXT.KFSD.FL.W.0004.000000T0000Z-230408T1200Z/
/MIFI4.1.RS.230401T0800Z.230404T0000Z.230407T1200Z.NO/
827 PM CDT Sun Apr 2 2023
...FLOOD WARNING NOW IN EFFECT UNTIL SATURDAY MORNING...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until Saturday morning.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 7:00 PM CDT Sunday the stage was 12.4 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 7:00 PM CDT Sunday was 12.4 feet.
- Forecast...The river is expected to rise to a crest of 12.6
feet tomorrow evening. It will then begin to fall.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 pm CDT)
Location Stg Stg Day/Time Mon Tue Wed
Little Sioux River
Milford 12.0 12.4 Sun 7 pm 12.6 12.5 12.4
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
BP427
WGUS83 KFSD 031517
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
1017 AM CDT Mon Apr 3 2023
...The Flood Warning is extended for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
...The Flood Warning continues for the following rivers in South
Dakota...
Willow Creek near Crooks affecting Minnehaha County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov.
The next statement will be issued Tuesday afternoon at 1215 PM CDT.
&&
IAC059-041730-
/O.EXT.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.SM.230401T0800Z.230403T1800Z.000000T0000Z.NO/
1017 AM CDT Mon Apr 3 2023
...FLOOD WARNING FOR SNOWMELT NOW IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 9:00 AM CDT Monday the stage was 12.9 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:00 AM CDT Monday was 12.9 feet.
- Forecast...The river is expected to remain nearly steady
around 12.9 feet through Tuesday afternoon, and then slowly
fall.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Tue Wed Thu
Little Sioux River
Milford 12.0 12.9 Mon 9 am 12.9 12.8 12.6
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
SDC099-041730-
/O.CON.KFSD.FL.W.0005.000000T0000Z-000000T0000Z/
/WCCS2.1.SM.230402T2155Z.230403T0315Z.000000T0000Z.NO/
1017 AM CDT Mon Apr 3 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring.
* WHERE...Willow Creek near Crooks.
* WHEN...Until further notice.
* IMPACTS...At 9.0 feet, the lower left banks overflow flooding some
pasture and hay land.
* ADDITIONAL DETAILS...
- At 9:15 AM CDT Monday the stage was 9.7 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:15 AM CDT Monday was 9.8 feet.
- Forecast...No forecast is available for this location.
- Flood stage is 9.0 feet.
&&
Fld Observed Forecasts (unknown time)
Location Stg Stg Day/Time d1 d2 d3
Willow Creek
Crooks 9.0 9.7 Mon 9 am MSG MSG MSG
&&
LAT...LON 4375 9684 4375 9682 4372 9684 4361 9682
4356 9681 4356 9683 4361 9684 4372 9686
$$
Masters662
WGUS83 KFSD 040135
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
835 PM CDT Mon Apr 3 2023
...The Flood Warning continues for the following rivers in South
Dakota...Iowa...
Willow Creek near Crooks affecting Minnehaha County.
Little Sioux River near Milford affecting Dickinson 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 Tuesday evening at 1045 PM CDT.
&&
SDC099-050345-
/O.CON.KFSD.FL.W.0005.000000T0000Z-000000T0000Z/
/WCCS2.1.SM.230402T2155Z.230404T0015Z.000000T0000Z.NO/
835 PM CDT Mon Apr 3 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring.
* WHERE...Willow Creek near Crooks.
* WHEN...Until further notice.
* IMPACTS...At 9.0 feet, the lower left banks overflow flooding some
pasture and hay land.
* ADDITIONAL DETAILS...
- At 8:15 PM CDT Monday the stage was 9.9 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 8:15 PM CDT Monday was 9.9 feet.
- Forecast...No forecast is available for this location.
- Flood stage is 9.0 feet.
&&
Fld Observed Forecasts (unknown time)
Location Stg Stg Day/Time d1 d2 d3
Willow Creek
Crooks 9.0 9.9 Mon 8 pm MSG MSG MSG
&&
LAT...LON 4375 9684 4375 9682 4372 9684 4361 9682
4356 9681 4356 9683 4361 9684 4372 9686
$$
IAC059-050345-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.SM.230401T0800Z.230404T0600Z.000000T0000Z.NO/
835 PM CDT Mon Apr 3 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 7:00 PM CDT Monday the stage was 13.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 7:00 PM CDT Monday was 13.0 feet.
- Forecast...The river is expected to rise to a crest of 13.1
feet tonight and then gradually fall through the week.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 pm CDT)
Location Stg Stg Day/Time Tue Wed Thu
Little Sioux River
Milford 12.0 13.0 Mon 7 pm 13.1 12.9 12.7
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Kalin770
WGUS83 KFSD 041525
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
1025 AM CDT Tue Apr 4 2023
...The Flood Warning continues for the following rivers in Iowa...
South Dakota...
Little Sioux River near Milford affecting Dickinson County.
Little Sioux River at Spencer affecting Clay County.
Willow Creek near Crooks affecting Minnehaha 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 Wednesday afternoon at 1215 PM CDT.
&&
IAC041-051730-
/O.EXT.KFSD.FL.W.0006.000000T0000Z-230406T0600Z/
/SPWI4.1.SM.230404T0435Z.230404T0800Z.230405T0600Z.NO/
1025 AM CDT Tue Apr 4 2023
...FLOOD WARNING FOR SNOWMELT NOW IN EFFECT UNTIL EARLY THURSDAY
MORNING...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River at Spencer.
* WHEN...Until early Thursday morning.
* IMPACTS...At 10.0 feet, the right bank overflows, and minor
flooding of the Spencer city park and some rural agricultural
areas begins.
* ADDITIONAL DETAILS...
- At 9:00 AM CDT Tuesday the stage was 10.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:00 AM CDT Tuesday was 10.1 feet.
- Forecast...The river is expected to fall below flood stage
just after midnight tonight and continue falling to 9.5 feet
Sunday morning.
- Flood stage is 10.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Wed Thu Fri
Little Sioux River
Spencer 10.0 10.0 Tue 9 am 9.9 9.8 9.7
&&
LAT...LON 4317 9520 4317 9514 4313 9502 4300 9501
4296 9508 4296 9516 4306 9508 4312 9519
$$
SDC099-051730-
/O.CON.KFSD.FL.W.0005.000000T0000Z-000000T0000Z/
/WCCS2.1.SM.230402T2155Z.230404T0015Z.000000T0000Z.NO/
1025 AM CDT Tue Apr 4 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring.
* WHERE...Willow Creek near Crooks.
* WHEN...Until further notice.
* IMPACTS...At 9.0 feet, the lower left banks overflow flooding some
pasture and hay land.
* ADDITIONAL DETAILS...
- At 9:15 AM CDT Tuesday the stage was 9.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:15 AM CDT Tuesday was 9.8 feet.
- Forecast...No forecast is available for this location.
- Flood stage is 9.0 feet.
&&
Fld Observed Forecasts (unknown time)
Location Stg Stg Day/Time d1 d2 d3
Willow Creek
Crooks 9.0 9.3 Tue 9 am MSG MSG MSG
&&
LAT...LON 4375 9684 4375 9682 4372 9684 4361 9682
4356 9681 4356 9683 4361 9684 4372 9686
$$
IAC059-051730-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.SM.230401T0800Z.230405T0600Z.000000T0000Z.NO/
1025 AM CDT Tue Apr 4 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 9:00 AM CDT Tuesday the stage was 13.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:00 AM CDT Tuesday was 13.3 feet.
- Forecast...The river is expected to rise to a crest of 13.4
feet just after midnight tonight...and then slowly fall
through the weekend.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Wed Thu Fri
Little Sioux River
Milford 12.0 13.3 Tue 9 am 13.4 13.2 13.0
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Masters743
WGUS83 KFSD 042034
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
334 PM CDT Tue Apr 4 2023
...The Flood Warning is extended for the following rivers in Iowa...
Little Sioux River at Spencer affecting Clay County.
...The Flood Warning continues for the following rivers in South
Dakota...Iowa...
Willow Creek near Crooks affecting Minnehaha County.
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued Wednesday afternoon at 530 PM CDT.
&&
IAC041-052245-
/O.EXT.KFSD.FL.W.0006.000000T0000Z-230407T1200Z/
/SPWI4.1.SM.230404T0435Z.230404T0800Z.230406T1200Z.NO/
334 PM CDT Tue Apr 4 2023
...FLOOD WARNING FOR SNOWMELT NOW IN EFFECT UNTIL FRIDAY MORNING...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River at Spencer.
* WHEN...Until Friday morning.
* IMPACTS...At 10.0 feet, the right bank overflows, and minor
flooding of the Spencer city park and some rural agricultural
areas begins.
* ADDITIONAL DETAILS...
- At 2:00 PM CDT Tuesday the stage was 10.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 2:00 PM CDT Tuesday was 10.1 feet.
- Forecast...The river is expected to fall below flood stage
Thursday morning and continue falling to 9.6 feet early
Sunday afternoon.
- Flood stage is 10.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Wed Thu Fri
Little Sioux River
Spencer 10.0 10.0 Tue 2 pm 10.0 9.9 9.8
&&
LAT...LON 4317 9520 4317 9514 4313 9502 4300 9501
4296 9508 4296 9516 4306 9508 4312 9519
$$
SDC099-052245-
/O.CON.KFSD.FL.W.0005.000000T0000Z-000000T0000Z/
/WCCS2.1.SM.230402T2155Z.230404T0015Z.000000T0000Z.NO/
334 PM CDT Tue Apr 4 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring.
* WHERE...Willow Creek near Crooks.
* WHEN...Until further notice.
* IMPACTS...At 9.0 feet, the lower left banks overflow flooding some
pasture and hay land.
* ADDITIONAL DETAILS...
- At 11:15 AM CDT Tuesday the stage was 9.4 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 11:15 AM CDT Tuesday was 9.5 feet.
- Forecast...No forecast is available for this location.
- Flood stage is 9.0 feet.
&&
Fld Observed Forecasts (unknown time)
Location Stg Stg Day/Time d1 d2 d3
Willow Creek
Crooks 9.0 9.4 Tue 11 am MSG MSG MSG
&&
LAT...LON 4375 9684 4375 9682 4372 9684 4361 9682
4356 9681 4356 9683 4361 9684 4372 9686
$$
IAC059-052245-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.SM.230401T0800Z.230405T1800Z.000000T0000Z.NO/
334 PM CDT Tue Apr 4 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 2:00 PM CDT Tuesday the stage was 13.4 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 2:00 PM CDT Tuesday was 13.4 feet.
- Forecast...The river is expected to rise to a crest of 13.8
feet early tomorrow afternoon.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Wed Thu Fri
Little Sioux River
Milford 12.0 13.4 Tue 2 pm 13.8 13.8 13.7
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
SST222
WGUS83 KFSD 051625
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
1125 AM CDT Wed Apr 5 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
...The Flood Warning is cancelled for the following rivers in South
Dakota...Iowa...
Willow Creek near Crooks affecting Minnehaha County.
Little Sioux River at Spencer affecting Clay 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 scheduled statement will be issued late Thursday morning.
&&
IAC041-051730-
/O.CAN.KFSD.FL.W.0006.000000T0000Z-230405T1625Z/
/SPWI4.1.SM.230404T0435Z.230404T0800Z.000000T0000Z.NO/
1125 AM CDT Wed Apr 5 2023
...FLOOD WARNING FOR SNOWMELT IS CANCELLED...
The Flood Warning is cancelled for
the Little Sioux River at Spencer.
* ADDITIONAL DETAILS...
- At 10:00 AM CDT Wednesday the stage was 9.9 feet.
- Forecast...The river is expected to fall to 9.2 feet Monday
morning.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Thu Fri Sat
Little Sioux River
Spencer 10.0 9.9 Wed 10 am 9.6 9.5 9.3
&&
LAT...LON 4317 9520 4317 9514 4313 9502 4300 9501
4296 9508 4296 9516 4306 9508 4312 9519
$$
SDC099-051730-
/O.CAN.KFSD.FL.W.0005.000000T0000Z-230405T1625Z/
/WCCS2.1.SM.230402T2155Z.230404T0015Z.230405T1124Z.NO/
1125 AM CDT Wed Apr 5 2023
...FLOOD WARNING FOR SNOWMELT IS CANCELLED...
The Flood Warning is cancelled for
the Willow Creek near Crooks.
* ADDITIONAL DETAILS...
- At 10:15 AM CDT Wednesday the stage was 8.9 feet.
- Forecast...No forecast is available for this location.
&&
Fld Observed Forecasts (unknown time)
Location Stg Stg Day/Time d1 d2 d3
Willow Creek
Crooks 9.0 8.9 Wed 10 am MSG MSG MSG
&&
LAT...LON 4375 9684 4375 9682 4372 9684 4361 9682
4356 9681 4356 9683 4361 9684 4372 9686
$$
IAC059-061830-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.SM.230401T0800Z.230405T1800Z.000000T0000Z.NO/
1125 AM CDT Wed Apr 5 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 10:00 AM CDT Wednesday the stage was 13.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 10:00 AM CDT Wednesday was 13.6 feet.
- Forecast...The river is expected to remain near the crest of
13.7 feet this afternoon.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Thu Fri Sat
Little Sioux River
Milford 12.0 13.5 Wed 10 am 13.7 13.6 13.3
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
SG973
WGUS83 KFSD 061451
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
951 AM CDT Thu Apr 6 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov.
The next statement will be issued Friday afternoon at 1200 PM CDT.
&&
IAC059-071700-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.SM.230401T0800Z.230406T1800Z.000000T0000Z.NO/
951 AM CDT Thu Apr 6 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 8:00 AM CDT Thursday the stage was 13.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 8:00 AM CDT Thursday was 13.5 feet.
- Forecast...The river is expected to rise to a crest of 13.5
feet this afternoon.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 am CDT)
Location Stg Stg Day/Time Fri Sat Sun
Little Sioux River
Milford 12.0 13.3 Thu 8 am 13.5 13.3 13.2
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$502
WGUS83 KFSD 061530
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
1030 AM CDT Thu Apr 6 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Additional information is available at www.weather.gov.
The next statement will be issued Friday afternoon at 1230 PM CDT.
&&
IAC059-071730-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.SM.230401T0800Z.230406T0400Z.000000T0000Z.NO/
1030 AM CDT Thu Apr 6 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 14.0 feet, significant amounts of pasture and other
farm lands begin to flood.
* ADDITIONAL DETAILS...
- At 8:00 AM CDT Thursday the stage was 13.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 8:00 AM CDT Thursday was 13.4 feet.
- Forecast...The river is expected to rise to a crest of 13.4
feet tomorrow morning.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Fri Sat Sun
Little Sioux River
Milford 12.0 13.3 Thu 8 am 13.3 13.2 13.2
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$384
WGUS83 KFSD 070152
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
852 PM CDT Thu Apr 6 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Additional information is available at www.weather.gov.
The next statement will be issued Friday evening at 1100 PM CDT.
&&
IAC059-080400-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/MIFI4.1.SM.230401T0800Z.230406T0400Z.000000T0000Z.NO/
852 PM CDT Thu Apr 6 2023
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until further notice.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 8:00 PM CDT Thursday the stage was 12.9 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 8:00 PM CDT Thursday was 13.2 feet.
- Forecast...The river is expected to fall to 12.3 feet Tuesday
evening.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 pm CDT)
Location Stg Stg Day/Time Fri Sat Sun
Little Sioux River
Milford 12.0 12.9 Thu 8 pm 12.8 12.8 12.7
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
SST557
WGUS83 KFSD 080155
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
855 PM CDT Fri Apr 7 2023
...The Flood Warning continues for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson 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 Saturday evening at 1100 PM CDT.
&&
IAC059-090400-
/O.EXT.KFSD.FL.W.0004.000000T0000Z-230409T1800Z/
/MIFI4.1.SM.230401T0800Z.230406T0400Z.230408T1800Z.NO/
855 PM CDT Fri Apr 7 2023
...FLOOD WARNING FOR SNOWMELT NOW IN EFFECT UNTIL EARLY SUNDAY
AFTERNOON...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Little Sioux River near Milford.
* WHEN...Until early Sunday afternoon.
* IMPACTS...At 12.0 feet, minor flooding of low lying agricultural
lands begins.
* ADDITIONAL DETAILS...
- At 7:00 PM CDT Friday the stage was 12.2 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 7:00 PM CDT Friday was 12.9 feet.
- Forecast...The river is expected to fall below flood stage
tomorrow afternoon and continue falling to 11.5 feet
Wednesday evening.
- Flood stage is 12.0 feet.
&&
Fld Observed Forecasts (7 pm CDT)
Location Stg Stg Day/Time Sat Sun Mon
Little Sioux River
Milford 12.0 12.2 Fri 7 pm 11.9 11.9 11.7
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$
Masters459
WGUS83 KFSD 081638
FLSFSD
Flood Statement
National Weather Service Sioux Falls SD
1138 AM CDT Sat Apr 8 2023
...The Flood Warning is cancelled for the following rivers in Iowa...
Little Sioux River near Milford affecting Dickinson County.
IAC059-081745-
/O.CAN.KFSD.FL.W.0004.000000T0000Z-230408T1638Z/
/MIFI4.1.SM.230401T0800Z.230406T0400Z.230408T1336Z.NO/
1138 AM CDT Sat Apr 8 2023
...FLOOD WARNING FOR SNOWMELT IS CANCELLED...
The Flood Warning is cancelled for
the Little Sioux River near Milford.
* ADDITIONAL DETAILS...
- At 10:00 AM CDT Saturday the stage was 12.0 feet.
- Forecast...The river is expected to fall to 11.3 feet
Thursday morning.
&&
Fld Observed Forecasts (1 pm CDT)
Location Stg Stg Day/Time Sun Mon Tue
Little Sioux River
Milford 12.0 12.0 Sat 10 am 11.7 11.6 11.5
&&
LAT...LON 4341 9527 4341 9523 4330 9515 4326 9520
4326 9527 4329 9523
$$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 Mar 29, 11:40 AM CDT, 2 hours 59 minutes earlier.
Area forecast discussion, Mar 29, 11:40 AM CDT, 2 hours 59 minutes before
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 1140 AM CDT Wed Mar 29 2023 .SHORT TERM...(Today and Tonight) Issued at 403 AM CDT Wed Mar 29 2023 Key Messages: 1. Light snow diminishes this morning, with cold temperatures and surface high pressure today. 2. Multi-faceted, multi hazard system remains progged to impact the Plains tomorrow and Friday. Severe weather, heavy rain, heavy snow, and strong winds are all in play. 3. Reprieve for the weekend, with a warmer day likely Sunday. 4. Another system is poised to impact the region early to mid next week. However, confidence is very low regarding any details given wide model spread. -------------------------------------------------------------------- Through Daybreak: Cold start once again to the day with 08z/3 AM CDT temperatures in the teens and 20s. Light snow continues to slide east for those along and south of I-90 through this morning. Accumulations are expected to remain below an inch. Northerly winds have been breezy at times, with gusts around 30 mph, which may produce reduced visibility in falling snow. Rest of Today: Any snow should come to an end by mid morning. Between CAA overhead and cold, Canadian surface high pressure sliding overhead, another colder than average day expected. Highs today range from the lower 20s (southwestern MN) to the mid/upper 30s (Highway 20). Not only are these highs near to below to our average lows, but for most of the area, fall closer to or below average highs for early January. Those near/along Hwy 20 will have temperatures closer to mid/late February averages. Relatively light easterly winds prevail, with clouds diminishing for a time mid day into the evening. Tonight: May see warming temperatures tonight, as robust WAA swings up from the southwest, and ridging builds and southerly flow aloft strengthens. Additionally, surface flow shifts southeasterly as our cold surface high slides east. We'll see winds strengthen late tonight too, as the surface pressure gradient (SPG) begins tightening in response to the developing surface low to the west. Winds around 10-20 mph by daybreak with gusts 25-30 mph. Southeasterly flow likely aids in moisture advection as well. Lows tonight range from the single digits in southwestern MN to the mid 20s along the Highway 20 corridor. Clouds should increase from south to north with the influx of moisture and WAA. .LONG TERM...(Thursday through Tuesday) Issued at 403 AM CDT Wed Mar 29 2023 Lots to talk about Thursday and beyond. Will use a line break to help differentiate the bulk of the upcoming system from the rest of the extended. Thursday: Mid and upper level ridging continues to develop overhead during Thursday, with the ridge axis sliding east during the day. Precipitation is possible during the day on Thursday, with the WAA continuing and LLJ ramping up across northwestern IA and into southwestern MN. A few factors do go against this potential though - capping, little to no instability, and models struggling with moisture via a potential dry slot. Can't rule out some patchy drizzle and/or sprinkles with lingering stratus. All that said, have kept pops to 30 or less for the most part in the east through the day, given aforementioned limiting factors. Stratus will also play a big role in temperatures, both with respective to sunshine and mixing. Still see a large spread between the deterministic guidance and ensembles, as well as the probabilities in highs. For example, the spread between the 25th percentile of NBM and 75th percentile of NBM remains around 12 degrees. 925mb temps between models for SUX vary from one degree C to around 16 deg C! Overall, given much warmer temps aloft and mixing potential if stratus is absent, have trended a bit warmer along the NE/SD border toward the Hwy 20 corridor. Highs from the upper 30s in the north near Hwy 14 to mid/upper 60s south. Thursday evening/night: Surface low pressure begins to eject out of the Rockies late Thursday afternoon through the evening and night. Given moisture return and warm air, models continue to indicate a high shear/low CAPE environment developing across portions of the forecast area by Thursday evening. This environment along with steep mid level lapse rates near/above 7 deg C/km could bring some strong to severe storms to the area. Main threat given the lapse rates would be hail, although strong wind gusts are possible with a few hundred joules of DCAPE, if a storm were to be able to punch through the stout inversion. Additionally, heavy rain is a threat with PWATs approaching the 90th percentile, combined with possible downstream storm development/training along the warm front and antecedent ground conditions. Both of these threats are outlined by the Day 2 Marginals from SPC and WPC, respectively. Center of the surface low sweeps across NE during this time, which would bring a lull to the synoptic winds. We'll begin to see the shift to northerly for those east of the James, although with timing differences in the models, this shift is uncertain. Cold air will then begin to wrap in, with a brief period of mix possible as locations switch to snow. Can't rule out thunder across the area as well, regardless of severe weather threat, given meager instability should cap be broken. Lows likely vary from the 20s in the west to mid 40s in the southeast. Friday and Friday night: Low treks northward into our area by Friday morning, with the transition to winter precip continuing. SPG tightens along with strong flow aloft mixing down leads to strong winds expanding west to east through Friday and Friday night. Although GFS and NAM guidance shows the potential for 50+ mph gusts late Friday afternoon through Friday night, have tapered this down using the 10th percentile NBM and limiting values, as most other guidance is not this robust with winds aloft that may be mixed down. Temps likely don't recover much, with possibly a non-diurnal trend depending on which model's timing is realized. Highs in the 30s to 50s, warmest in northwestern IA. Lows fall into the single digits to lower 20s as the CAA wraps in and northerly flow dominates. A strong to severe storm is possible in the east (our far southeastern counties) Friday afternoon, depending on where the triple point and low pressure are centered. With more instability and aided by the boundaries in place, any single cells may grow upscale as they trek east. Greatest risk of severe weather exists from central IA to ArkLaTex to the OH Valley. SPC Marginal in our northwestern IA counties for Day 3 highlights the threat in our area. Heavy snow is likely for portions of the area, given the ample moisture as cold air swings in. Have held off on any headlines (Winter Storm Watch) in collaboration with neighbors, although believe one will be needed later today with higher confidence in change-over timing. There is a 60+% chance that some folks west of the James and across higher elevations of southwestern MN and eastern SD could see 6 inches of snow or more, but the confidence in this is low given clustering in the ensemble models near/below this value. Strong winds will likely create blowing and drifting snow into Saturday regardless of amounts. All in all, the GFS is becoming less of an outlier as of the 29.00z runs with the evolution of the entire system, albeit remaining slower than the others. With a multi-faceted and large system bringing numerous potential impacts to the region, it's imperative for folks to keep an eye on the forecast, as it is likely to change. Prepare now for all hazards. Be prepared to change or cancel local and regional travel plans. _____________________________________________________________________ Weekend: Low pressure and upper trough slides off toward the Great Lakes by Saturday afternoon. Would expect any lingering wrap around precip to end by then. We'll likely be colder and breezy, with CAA, northwesterly flow and building surface high pressure Saturday. This will lead to highs in the 30s and 40s. Strong winds start the day Saturday, tapering down as the aforementioned surface high slides in. A quick moving mid level short wave may move through during the day, but not expecting much in the way of impacts. Lows Saturday night in the 20s and 30s. Sunday brings more zonal flow and WAA to the region. Highs in the 40s to lower/mid 60s, warmest in northwestern IA and into the Highway 20 corridor. Monday and Tuesday: Zonal flow and a couple of short waves with temperatures near to below normal. Ridge briefly builds in ahead of the next system mid next week. Models have even less certainty with this potential system than with the one later this week, but early to mid next week will be a time period to keep an eye on in the coming days. && .AVIATION...(For the 18Z TAFS through 18Z Thursday Afternoon) Issued at 1140 AM CDT Wed Mar 29 2023 Mainly VFR conditions expected through the period. Light northeasterly winds today will transition to southeasterly later tonight, increasing with gusts around 30 kts by mid morning on Thursday. There are some indications that MVFR stratus will develop later on Thursday morning, though this would occur at the very end of the TAF period. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...None. MN...None. IA...None. NE...None. && SHORT TERM...SG LONG TERM...SG AVIATION...JM
Hazardous weather outlook, Mar 29, 4:19 AM CDT, 10 hours 20 minutes before
Hazardous Weather Outlook National Weather Service Sioux Falls SD 419 AM CDT Wed Mar 29 2023 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-300930- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory- Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook- Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton- Union- 419 AM CDT Wed Mar 29 2023 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. Light snow south of Interstate 90 tapers off by late this morning. Accumulations are expected to remain below one inch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Precipitation chances return Thursday through Friday night, but confidence in details regarding precipitation types and amounts is low at this time. However, isolated strong to severe storms, locally heavy rainfall, and heavy snow are all possible across the northern and central Plains. Strong winds are expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Nearby
River Flood Warnings in Iowa, 2023Every river flood warning in 2023
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.