Alert archive / Minnesota / Ice Storm Warnings in 2019

Ice Storm Warning 2, NWS Sioux Falls, SD

December 28, 20197 counties in Minnesota

NWS Sioux Falls, SD issued this ice storm warning at Dec 28, 2019, 3:41 AM CST for 7 counties in Minnesota. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 28, 2019, 3:41 AM CST (09:41 UTC)
Expired
Dec 28, 2019, 3:00 PM CST
In force
11 hr
Issued by
NWS Sioux Falls, SD

Counties Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN

The radar

The Sioux Falls radar (KFSD), 93 km from the middle of the area, began a volume at 09:44 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.7 hours before the alert went out and 193 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2019-12-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2019-12-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1234 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
207 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

654 
WWUS43 KFSD 280941
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
341 AM CST Sat Dec 28 2019

MNZ071-072-282300-
/O.UPG.KFSD.WS.W.0008.000000T0000Z-191230T1200Z/
/O.NEW.KFSD.IS.W.0002.191228T0941Z-191229T1200Z/
/O.EXB.KFSD.WW.Y.0036.191229T1200Z-191230T1200Z/
Lincoln-Lyon-
341 AM CST Sat Dec 28 2019

...ICE STORM WARNING IN EFFECT UNTIL 6 AM CST SUNDAY...
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM SUNDAY TO 6 AM CST
MONDAY...

* WHAT...For the Ice Storm Warning, significant icing. Additional
  snow accumulations of 2 to 4 inches and ice accumulations of 
  two tenths to one half of an inch. For the Winter Weather 
  Advisory, mixed precipitation expected. Total snow accumulations
  of 1 to 3 inches and a light glaze of ice.

* WHERE...Lincoln and Lyon Counties.

* WHEN...For the Ice Storm Warning, until 6 AM CST Sunday. For 
  the Winter Weather Advisory, from 6 AM Sunday to 6 AM CST 
  Monday.

* IMPACTS...Power outages and tree damage are likely due to the
  ice. Travel could be impossible. Patchy blowing snow could 
  significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel is strongly discouraged. If you must travel, keep an extra
flashlight, food and water in your vehicle in case of an
emergency. Prepare for possible power outages. 

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MNZ080-081-089-090-097-282300-
/O.UPG.KFSD.WW.Y.0036.000000T0000Z-191230T1200Z/
/O.NEW.KFSD.IS.W.0002.191228T0941Z-191229T1200Z/
/O.NEW.KFSD.WW.Y.0037.191229T1200Z-191230T1200Z/
Murray-Cottonwood-Nobles-Jackson-Pipestone-
341 AM CST Sat Dec 28 2019

...ICE STORM WARNING IN EFFECT UNTIL 6 AM CST SUNDAY...
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM SUNDAY TO 6 AM CST
MONDAY...

* WHAT...For the Ice Storm Warning, significant icing. Additional
  snow accumulations of up to 3 inches and ice accumulations of 
  two tenths to one half of an inch. For the Winter Weather 
  Advisory, mixed precipitation expected. Total snow accumulations
  of up to two inches and ice accumulations of a light glaze.

* WHERE...Murray, Cottonwood, Nobles, Jackson and Pipestone 
  Counties.

* WHEN...For the Ice Storm Warning, until 6 AM CST Sunday. For 
  the Winter Weather Advisory, from 6 AM Sunday to 6 AM CST 
  Monday.

* IMPACTS...Expect power outages and tree damage due to the ice.
  Travel could be impossible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel is strongly discouraged. If you must travel, keep an extra
flashlight, food and water in your vehicle in case of an
emergency. Prepare for possible power outages. 

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

SDZ050-052-057>059-063>065-068-282300-
/O.CON.KFSD.WS.W.0008.000000T0000Z-191230T1200Z/
Gregory-Jerauld-Brule-Aurora-Davison-Charles Mix-Douglas-
Hutchinson-Bon Homme-
341 AM CST Sat Dec 28 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY...

* WHAT...Heavy mixed precipitation. Additional snow accumulations
  of 10 to 16 inches and ice accumulations of a light glaze. 
  Winds gusting as high as 40 mph.

* WHERE...Portions of central, south central and southeast South 
  Dakota.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Travel could be very difficult to impossible.
  Widespread blowing snow could significantly reduce visibility.

* ADDITIONAL DETAILS...Light freezing rain is possible during the
  daytime hours. Heavy snow will likely not begin until the early
  overnight hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

SDZ038>040-053>055-060-061-282300-
/O.CON.KFSD.WS.W.0008.000000T0000Z-191230T1200Z/
Beadle-Kingsbury-Brookings-Sanborn-Miner-Lake-Hanson-McCook-
341 AM CST Sat Dec 28 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY...

* WHAT...Heavy mixed precipitation. Additional snow 
  accumulations of 8 to 15 inches and ice accumulations of one 
  tenth to two tenths of an inch. Winds gusting as high as 40 
  mph.

* WHERE...Portions of east central and southeast South Dakota.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility.

* ADDITIONAL DETAILS...Light freezing rain is possible during the
  daytime hours. Heavy snow will likely not begin until the early
  overnight hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ013-282300-
/O.NEW.KFSD.WW.Y.0037.191229T0600Z-191230T1200Z/
/O.CON.KFSD.WW.Y.0036.000000T0000Z-191228T1500Z/
O'Brien-
341 AM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS
MORNING...
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
6 AM CST MONDAY...

* WHAT...For the first Winter Weather Advisory, mixed
  precipitation. Additional snow accumulations of up to one inch
  and ice accumulations of a light glaze. For the second Winter 
  Weather Advisory, mixed precipitation expected. Total snow 
  accumulations of up to two inches and ice accumulations of a 
  light glaze.

* WHERE...O'Brien County.

* WHEN...For the first Winter Weather Advisory, until 9 AM CST 
  this morning. For the second Winter Weather Advisory, from 
  midnight tonight to 6 AM CST Monday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ012-020-031-NEZ013-014-SDZ070-071-282300-
/O.NEW.KFSD.WW.Y.0037.191229T0600Z-191230T1200Z/
/O.EXT.KFSD.WW.Y.0036.000000T0000Z-191228T1500Z/
Sioux-Plymouth-Woodbury-Dixon-Dakota-Clay-Union-
341 AM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM CST THIS
MORNING...
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
6 AM CST MONDAY...

* WHAT...For the first Winter Weather Advisory, mixed 
  precipitation. Additional snow accumulations of up to one inch 
  and ice accumulations of a light glaze. For the second Winter 
  Weather Advisory, mixed precipitation expected. Total snow 
  accumulations of 2 to 4 inches and ice accumulations of up to 
  one tenth of an inch. Winds gusting as high as 35 mph.

* WHERE...Portions of southeast South Dakota, northeast Nebraska 
  and northwest and west central Iowa.

* WHEN...For the first Winter Weather Advisory, until 9 AM CST 
  this morning. For the second Winter Weather Advisory, from 
  midnight tonight to 6 AM CST Monday.

* IMPACTS...Plan on slippery road conditions. Areas of blowing
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ014-021-281500-
/O.CON.KFSD.WW.Y.0036.000000T0000Z-191228T1500Z/
Clay-Cherokee-
341 AM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS
MORNING...

* WHAT...Mixed precipitation. Additional snow accumulations of up
  to one inch and ice accumulations of a light glaze.

* WHERE...Clay and Cherokee Counties.

* WHEN...Until 9 AM CST this morning.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ001>003-MNZ098-SDZ056-062-066-067-069-282300-
/O.CON.KFSD.WW.Y.0036.000000T0000Z-191230T1200Z/
Lyon-Osceola-Dickinson-Rock-Moody-Minnehaha-Turner-Lincoln-
Yankton-
341 AM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST
MONDAY...

* WHAT...Mixed precipitation. Additional snow accumulations of 2 
  to 6 inches and ice accumulations of one tenth to one quarter 
  of an inch. Winds gusting as high as 40 mph.

* WHERE...Portions of east central and southeast South Dakota, 
  northwest Iowa and southwest Minnesota.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Power outages and tree damage are possible due to the
  ice. Travel could be very difficult. Areas of blowing snow 
  could significantly reduce visibility.

* ADDITIONAL DETAILS...Freezing rain is possible during the
  daytime hours and into the overnight. Heavy snow will likely 
  not begin until the early overnight hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
2 follow-up statements
791 
WWUS43 KFSD 281741
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
1141 AM CST Sat Dec 28 2019


MNZ080-081-089-090-097-290145-
/O.CON.KFSD.IS.W.0002.000000T0000Z-191229T1200Z/
/O.CON.KFSD.WW.Y.0037.191229T1200Z-191230T1200Z/
Murray-Cottonwood-Nobles-Jackson-Pipestone-
Including the cities of Slayton, Fulda, Windom, Mountain Lake, 
Worthington, Jackson, Lakefield, and Pipestone
1141 AM CST Sat Dec 28 2019

...ICE STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST SUNDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM SUNDAY TO
6 AM CST MONDAY...

* WHAT...For the Ice Storm Warning, significant icing. 
  Additional snow accumulations of up to 3 inches and ice 
  accumulations of two tenths to one half of an inch. For the 
  Winter Weather Advisory, mixed precipitation expected. Total 
  snow accumulations of up to two inches and ice accumulations 
  of a light glaze. 

* WHERE...Murray, Cottonwood, Nobles, Jackson and Pipestone 
  Counties. 

* WHEN...For the Ice Storm Warning, until 6 AM CST Sunday. For 
  the Winter Weather Advisory, from 6 AM Sunday to 6 AM CST 
  Monday. 

* IMPACTS...Expect power outages and tree damage due to the ice. 
  Travel could be impossible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel is strongly discouraged. If you must travel, keep an extra
flashlight, food and water in your vehicle in case of an
emergency. Prepare for possible power outages.

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MNZ071-072-290145-
/O.CON.KFSD.IS.W.0002.000000T0000Z-191229T1200Z/
/O.CON.KFSD.WW.Y.0036.191229T1200Z-191230T1200Z/
Lincoln-Lyon-
Including the cities of Tyler, Hendricks, Lake Benton, Ivanhoe, 
and Marshall
1141 AM CST Sat Dec 28 2019

...ICE STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST SUNDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM SUNDAY TO
6 AM CST MONDAY...

* WHAT...For the Ice Storm Warning, significant icing. 
  Additional snow accumulations of 2 to 4 inches and ice 
  accumulations of two tenths to one half of an inch. For the 
  Winter Weather Advisory, mixed precipitation expected. Total 
  snow accumulations of 1 to 3 inches and a light glaze of ice. 

* WHERE...Lincoln and Lyon Counties.

* WHEN...For the Ice Storm Warning, until 6 AM CST Sunday. For 
  the Winter Weather Advisory, from 6 AM Sunday to 6 AM CST 
  Monday. 

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be impossible. Patchy blowing snow could 
  significantly reduce visibility. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel is strongly discouraged. If you must travel, keep an extra
flashlight, food and water in your vehicle in case of an
emergency. Prepare for possible power outages.

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

SDZ050-052-057>059-063>065-068-290145-
/O.CON.KFSD.WS.W.0008.000000T0000Z-191230T1200Z/
Gregory-Jerauld-Brule-Aurora-Davison-Charles Mix-Douglas-
Hutchinson-Bon Homme-
Including the cities of Gregory, Burke, Wessington Springs, 
Alpena, Chamberlain, Kimball, Plankinton, White Lake, Stickney, 
Mitchell, Wagner, Platte, Lake Andes, Marty, Armour, Corsica, 
Delmont, Parkston, Freeman, Menno, Tripp, Clayton, Tyndall, 
Scotland, Springfield, Avon, and Tabor
1141 AM CST Sat Dec 28 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY...

* WHAT...Heavy mixed precipitation. Additional snow 
  accumulations of 10 to 16 inches and ice accumulations of a 
  light glaze. Winds gusting as high as 40 mph. 

* WHERE...Portions of central, south central and southeast South 
  Dakota. 

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Travel could be very difficult to impossible. 
  Widespread blowing snow could significantly reduce visibility. 

* ADDITIONAL DETAILS...Light freezing rain is possible during 
  the daytime hours. Heavy snow will likely not begin until the 
  early overnight hours. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

SDZ038>040-053>055-060-061-290145-
/O.CON.KFSD.WS.W.0008.000000T0000Z-191230T1200Z/
Beadle-Kingsbury-Brookings-Sanborn-Miner-Lake-Hanson-McCook-
Including the cities of Huron, De Smet, Arlington, Lake Preston, 
Brookings, Woonsocket, Howard, Madison, Orland, Alexandria, 
Emery, Salem, Canistota, Bridgewater, and Montrose
1141 AM CST Sat Dec 28 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY...

* WHAT...Heavy mixed precipitation. Additional snow 
  accumulations of 8 to 15 inches and ice accumulations of one 
  tenth to two tenths of an inch. Winds gusting as high as 40 
  mph. 

* WHERE...Portions of east central and southeast South Dakota.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility. 

* ADDITIONAL DETAILS...Light freezing rain is possible during 
  the daytime hours. Heavy snow will likely not begin until the 
  early overnight hours. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ001>003-MNZ098-SDZ056-062-066-067-069-290145-
/O.CON.KFSD.WW.Y.0036.000000T0000Z-191230T1200Z/
Lyon-Osceola-Dickinson-Rock-Moody-Minnehaha-Turner-Lincoln-
Yankton-
Including the cities of Rock Rapids, George, Inwood, Larchwood, 
Sibley, Spirit Lake, Milford, Arnolds Park, Luverne, Flandreau, 
Sioux Falls, Parker, Centerville, Marion, Viborg, Irene, Hurley, 
Chancellor, Canton, Lennox, Tea, Harrisburg, and Yankton
1141 AM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST
MONDAY...

* WHAT...Mixed precipitation. Additional snow accumulations of 2 
  to 6 inches and ice accumulations of one tenth to one quarter 
  of an inch. Winds gusting as high as 40 mph. 

* WHERE...Portions of east central and southeast South Dakota, 
  northwest Iowa and southwest Minnesota. 

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Power outages and tree damage are possible due to 
  the ice. Travel could be very difficult. Areas of blowing snow 
  could significantly reduce visibility. 

* ADDITIONAL DETAILS...Freezing rain is possible during the 
  daytime hours and into the overnight. Heavy snow will likely 
  not begin until the early overnight hours. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ012-013-020-031-NEZ013-014-SDZ070-071-290145-
/O.CON.KFSD.WW.Y.0037.191229T0600Z-191230T1200Z/
Sioux-O'Brien-Plymouth-Woodbury-Dixon-Dakota-Clay-Union-
Including the cities of Sioux Center, Orange City, Rock Valley, 
Hawarden, Hull, Sheldon, Hartley, Sanborn, Le Mars, Sioux City, 
Wakefield, Ponca, Allen, South Sioux City, Vermillion, 
North Sioux City, Beresford, Elk Point, Alcester, and Jefferson
1141 AM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 6 AM CST MONDAY...

* WHAT...For the first Winter Weather Advisory, mixed 
  precipitation. Additional snow accumulations of up to one inch 
  and ice accumulations of a light glaze. For the second Winter 
  Weather Advisory, mixed precipitation expected. Total snow 
  accumulations of up to two inches and ice accumulations of a 
  light glaze. 

* WHERE...O'Brien County.

* WHEN...For the first Winter Weather Advisory, until 9 AM CST 
  this morning. For the second Winter Weather Advisory, from 
  midnight tonight to 6 AM CST Monday. 

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
097 
WWUS43 KFSD 282100
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
300 PM CST Sat Dec 28 2019

MNZ080-081-089-090-097-290500-
/O.CAN.KFSD.IS.W.0002.000000T0000Z-191229T1200Z/
/O.EXT.KFSD.WW.Y.0037.191228T2100Z-191230T1200Z/
Murray-Cottonwood-Nobles-Jackson-Pipestone-
300 PM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 6 AM CST MONDAY...
...ICE STORM WARNING IS CANCELLED...

* WHAT...Mixed precipitation. Additional snow accumulations of 1
  to 3 inches and ice accumulations of up to two tenths of an 
  inch.

* WHERE...Murray, Cottonwood, Nobles, Pipestone and Jackson 
  Counties.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Plan on slippery road conditions.

* ADDITIONAL DETAILS...Rain or freezing rain will be most
  prevalent tonight, transitioning to snow through the day on
  Sunday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MNZ071-072-290500-
/O.CAN.KFSD.IS.W.0002.000000T0000Z-191229T1200Z/
/O.EXT.KFSD.WW.Y.0036.191228T2100Z-191230T1200Z/
Lincoln-Lyon-
300 PM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 6 AM CST MONDAY...
...ICE STORM WARNING IS CANCELLED...

* WHAT...Mixed precipitation. Additional snow accumulations of 3
  to 9 inches, with highest amounts in the higher elevations of
  Lincoln County. Additional ice accumulations of up to one tenth
  of an inch.

* WHERE...Lincoln and Lyon Counties.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility.

* ADDITIONAL DETAILS...Rain or freezing rain will be most
  prevalent tonight, transitioning to snow through the day on
  Sunday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

SDZ050-052-057>059-063>065-068-290500-
/O.CON.KFSD.WS.W.0008.000000T0000Z-191230T1200Z/
Gregory-Jerauld-Brule-Aurora-Davison-Charles Mix-Douglas-
Hutchinson-Bon Homme-
300 PM CST Sat Dec 28 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY...

* WHAT...Heavy snow, mixed with rain or freezing rain at times
  this evening. Additional snow accumulations of 9 to 17 inches
  and ice accumulations of a light glaze. Winds gusting as high as
  45 mph, causing blowing and drifting snow.

* WHERE...Portions of central, south central and southeast South 
  Dakota.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Travel could be very difficult to impossible. 
  Widespread blowing snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

SDZ038>040-053>055-060-061-290500-
/O.CON.KFSD.WS.W.0008.000000T0000Z-191230T1200Z/
Beadle-Kingsbury-Brookings-Sanborn-Miner-Lake-Hanson-McCook-
300 PM CST Sat Dec 28 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY...

* WHAT...Heavy snow, mixed with rain or freezing rain at times
  tonight. Additional snow accumulations of 6 to 15 inches and 
  ice accumulations of around one tenth of an inch. Winds gusting 
  as high as 40 mph.

* WHERE...Portions of east central and southeast South Dakota.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ012-013-020-031-NEZ013-014-SDZ070-071-290500-
/O.EXT.KFSD.WW.Y.0037.191229T1200Z-191230T1200Z/
Sioux-O'Brien-Plymouth-Woodbury-Dixon-Dakota-Clay-Union-
300 PM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 6 AM SUNDAY TO 6 AM
CST MONDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 4 
  inches. Winds gusting as high as 35 mph.

* WHERE...Portions of southeast South Dakota, northeast Nebraska 
  and northwest and west central Iowa.

* WHEN...From 6 AM Sunday to 6 AM CST Monday.

* IMPACTS...Plan on slippery road conditions. Areas of blowing 
  snow could significantly reduce visibility.

* ADDITIONAL DETAILS...Watch for slippery roads, not only from
  snow, but wet roads becoming icy as temperatures fall below
  freezing late tonight and Sunday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ001>003-MNZ098-SDZ056-062-066-067-069-290500-
/O.CON.KFSD.WW.Y.0036.000000T0000Z-191230T1200Z/
Lyon-Osceola-Dickinson-Rock-Moody-Minnehaha-Turner-Lincoln-
Yankton-
300 PM CST Sat Dec 28 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST
MONDAY...

* WHAT...Mixed precipitation. Additional snow accumulations of 1 
  to 8 inches and ice accumulations of a light glaze. Winds 
  gusting as high as 35 mph.

* WHERE...Portions of east central and southeast South Dakota, 
  northwest Iowa and southwest Minnesota.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility.

* ADDITIONAL DETAILS...Watch for slippery roads, not only from
  snow, but wet roads becoming icy as temperatures fall below
  freezing late tonight and Sunday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

What forecasters said that day

The local office's own words before this ice storm 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 ice storm warning went out at Dec 27, 10:56 PM CST, 4 hours 45 minutes earlier.

Area forecast discussion, Dec 27, 10:56 PM CST, 4 hours 45 minutes before
AREA FORECAST DISCUSSION
National Weather Service Sioux Falls SD
1056 PM CST Fri Dec 27 2019

.UPDATE...
Issued at 1047 PM CST Fri Dec 27 2019

Forecast largely remains on track with precip working currently
working across the NE/SD border as of late evening. Spotter,
surface obs, and MPing reports have indicated much of this is
falling as either sleet or freezing rain with this expected to be
the trend through the night with thermal profiles in various point
forecast soundings showing a saturated layer within a couple
degrees either side of the freezing mark. Added in Clay, O'Brien,
and Cherokee counties in NW IA to the Advisory earlier this
evening with some concern of a light glaze of ice in those areas
as well and road temperatures very near the freezing mark. Quick
look at evening guidance hints at perhaps a bit higher concern of
icing along the Buffalo Ridge but won't make whole sale changes
yet and instead pass along to night shift to evaluate full model
suite.

&&

.SHORT TERM...(This Evening through Saturday)
Issued at 415 PM CST Fri Dec 27 2019

Still on track for a significant winter storm to affect the region
beginning later tonight and continuing in one fashion or another
into Monday. The system that will affect our area is currently still
in the Four Corners region, but warm air advection surging northward
out ahead of the feature will initiate light snow across the area
during the early overnight hours - transitioning to mixed
precipitation by later at night as thermal profiles begin to warm.
One of the main changes to the forecast package was to warm max wet
bulb temperatures aloft through Saturday with almost all guidance
coming in warmer. The main affect of this was to change precipitation
type to more of a mixed variety - and reducing overall snow amounts
a bit over portions of our east. In addition, may see more
widespread rain across the area on Saturday than previously
forecasted. Still a very tricky forecast however, as a difference of
a degree or two both aloft or at the surface will change snow/ice
amounts. Lowest confidence in precipitation type resides roughly from
Yankton to Sioux Falls to Slayton MN and areas to the east. The
greatest icing potential will be from east central SD through
southwestern MN and surrounding areas, this coming later tonight
into Saturday morning, then again later on Saturday night as surface
temperatures begin to cool, with a tenth to around a quarter of an
inch possible.

.LONG TERM...(Saturday Night through Friday)
Issued at 415 PM CST Fri Dec 27 2019

Due to the slow nature of this system, precipitation will persist
through Monday, with the greatest snow amounts occurring late
Saturday night and Sunday in areas west of Interstate 29 as cooler
air begins to wrap into the the system and temperatures aloft begin
to cool. In addition, winds will begin to increase on Saturday night
through Monday as surface low pressure deepens over western MN/IA
and then moves eastward through the period. This will obviously
impact areas that receive appreciable snow as blowing snow will
become an issue. At this time, winds look to remain mainly in the
range of 25 to 35 mph, and with the wet nature of the snow do not
expected blizzard conditions - though near white out conditions will
be possible in some areas at times. Total snowfall amounts through
Monday will range from 10 to 12 inches + from east central SD to the
mid MO River corridor and westward, with amounts then diminishing
downward to the east with 1 to 2 inches possible over parts of
southwestern MN and northwestern IA.

In terms of headlines, transitioned the Winter Storm Watches to
Winter Storm Warnings/Winter Weather Advisories for most of the
area beginning tonight and continuing through Sunday night. These
headlines may need to be adjusted over the weekend dependent on
how precipitation type evolves.

Fortunately, with the passage of this system the remainder of next
week looks primarily dry. Temperatures will be around normal through
the period.

&&

.AVIATION...(For the 06Z TAFS through 06Z Saturday night)
Issued at 1047 PM CST Fri Dec 27 2019

Complex aviation period expected through the weekend with a messy
winter storm just now entering the region. Wintry precipitation is
expected overnight with sleet, freezing rain, snow and plain rain
all possible at the TAF sites. KHON has the highest chances of
remaining a wintry precip type while KSUX will likely fairly
quickly switch to a cold rain. Temperatures at KSUX and KFSD will
likely rise above freezing by daybreak with plain rain expected
thru the rest of the day Saturday. It's worth stressing that
confidence in exact precipitation type overnight remains fairly
low. IFR and lower stratus will work in thru the overnight hours
with occasional vsby restrictions during falling precipitation.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...Winter Weather Advisory until 6 AM CST Monday for SDZ056-062-066-
     067-069>071.

     Winter Storm Warning until 6 AM CST Monday for SDZ050-052-
     057>059-063>065-068.

     Winter Storm Warning until 6 AM CST Monday for SDZ038>040-
     053>055-060-061.

MN...Winter Weather Advisory until 6 AM CST Monday for MNZ080-081-089-
     090-097-098.

     Winter Storm Warning until 6 AM CST Monday for MNZ071-072.

IA...Winter Weather Advisory until 6 AM CST Monday for IAZ001>003-012-
     020-031.

     Winter Weather Advisory until 9 AM CST Saturday for IAZ013-014-
     021.

NE...Winter Weather Advisory until 6 AM CST Monday for NEZ013-014.

&&

UPDATE...Kalin
SHORT TERM...JM
LONG TERM...JM
AVIATION...Kalin
Hazardous weather outlook, Dec 27, 6:41 PM CST, 9 hours before
Hazardous Weather Outlook
National Weather Service Sioux Falls SD
641 PM CST Fri Dec 27 2019

SDZ050-052-057>059-063>065-068-290045-
Gregory-Jerauld-Brule-Aurora-Davison-Charles Mix-Douglas-Hutchinson-
Bon Homme-
641 PM CST Fri Dec 27 2019

This Hazardous Weather Outlook is for central South Dakota, south
central South Dakota and southeast South Dakota.

.DAY ONE...Tonight.

Late this evening and overnight, a wintry mix of freezing rain,
sleet, and snow will moving into the region. Light snow accumulations
are possible with ice accumulations between a light glaze and one
tenth of an inch. This will lead to slick roads and may make travel
difficult to hazardous.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

An impactful winter storm will continue to affect the area Saturday
through the day Monday, with periods of freezing rain, heavy snow,
and blowing snow. Plan ahead if traveling.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MNZ071-072-SDZ038>040-053>055-060-061-290045-
Lincoln-Lyon-Beadle-Kingsbury-Brookings-Sanborn-Miner-Lake-Hanson-
McCook-
641 PM CST Fri Dec 27 2019

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

.DAY ONE...Tonight.

Late this evening and overnight, a wintry mix of freezing rain,
sleet, and snow will moving into the region. Light snow accumulations
are possible with ice accumulations between a light glaze and one
tenth of an inch. This will lead to slick roads and may make travel
difficult to hazardous.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

An impactful winter storm will continue to affect the area Saturday
through the day Monday, with periods of freezing rain, heavy snow,
and blowing snow. Plan ahead if traveling.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

IAZ001>003-012-020-031-MNZ080-081-089-090-097-098-NEZ013-014-SDZ056-
062-066-067-069>071-290045-
Lyon-Osceola-Dickinson-Sioux-Plymouth-Woodbury-Murray-Cottonwood-
Nobles-Jackson-Pipestone-Rock-Dixon-Dakota-Moody-Minnehaha-Turner-
Lincoln-Yankton-Clay-Union-
641 PM CST Fri Dec 27 2019

This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska, east central South
Dakota and southeast South Dakota.

.DAY ONE...Tonight.

Late this evening and overnight, a wintry mix of freezing rain,
sleet, and snow will moving into the region. Light snow accumulations
are possible with ice accumulations between a light glaze and one
tenth of an inch. This will lead to slick roads and may make travel
difficult to hazardous.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

An impactful winter storm will continue to affect the area Saturday
through the day Monday, with periods of freezing rain, heavy snow,
and blowing snow. Plan ahead if traveling.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

IAZ013-014-021-022-032-290045-
O'Brien-Clay-Cherokee-Buena Vista-Ida-
641 PM CST Fri Dec 27 2019

This Hazardous Weather Outlook is for northwest Iowa and west
central Iowa.

.DAY ONE...Tonight.

Late this evening and overnight, a wintry mix of freezing rain, sleet
and snow will move into the region. This may lead to slick roads and
difficult travel. Temperatures are expected to rise above freezing
closer to daybreak, switching any precipitation over to plain rain,
although slick conditions may remain for a period. Use caution if
traveling.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

An impactful winter storm will continue to affect the area Saturday
through the day Monday, with periods of freezing rain, heavy snow,
and blowing snow. The highest impacts are expected as you move north
and west of northwest Iowa. Plan ahead if traveling.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 28, 3:41 AM CSTWinter Weather AdvisoryFSDCottonwood, Jackson, Murray, Nobles, Pipestone68 hr

Nearby

Ice Storm Warnings in Minnesota, 2019Every ice storm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.