Alert archive / South Dakota / Winter Weather Advisories in 2019

Winter Weather Advisory 21, NWS Sioux Falls, SD

March 12, 2019Aurora County, Douglas County, Sanborn County, South Dakota

NWS Sioux Falls, SD issued this winter weather advisory at Mar 12, 2019, 9:18 PM CDT for Aurora County, Douglas County, Sanborn County, South Dakota. It took effect at Mar 13, 2019, 10:00 PM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 12, 2019, 9:18 PM CDT (02:18 UTC)
In effect from
Mar 13, 2019, 10:00 PM CDT
Expired
Mar 13, 2019, 4:03 PM CDT
In force
Issued by
NWS Sioux Falls, SD

Counties Aurora County, SD, Douglas County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 130 km from the middle of the area, began a volume at 02:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.3 hours before the alert went out and 132 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, Aberdeen, SD at 00:00Z on 2019-03-13Temperature 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, Aberdeen, SD at 00:00Z on 2019-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 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
1294 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

105 
WWUS43 KFSD 130218
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
918 PM CDT Tue Mar 12 2019

SDZ050-063-131030-
/O.UPG.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
/O.EXA.KFSD.WS.W.0004.190313T1200Z-190315T0000Z/
Gregory-Charles Mix-
918 PM CDT Tue Mar 12 2019

...WINTER STORM WARNING IN EFFECT FROM 7 AM WEDNESDAY TO 7 PM CDT
THURSDAY...

* WHAT...Heavy mixed precipitation expected. Total snow 
  accumulations of 3 to 5 inches and ice accumulations of around 
  two tenths of an inch expected. Winds gusting as high as 55 
  mph.

* WHERE...Gregory and Charles Mix Counties.

* WHEN...From 7 AM Wednesday to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. 

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

&&

$$

SDZ038-052-057-131030-
/O.CON.KFSD.WS.W.0004.190313T1200Z-190315T0000Z/
Beadle-Jerauld-Brule-
918 PM CDT Tue Mar 12 2019

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 AM WEDNESDAY TO
7 PM CDT THURSDAY...

* WHAT...Freezing rain, mainly Wednesday morning, with ice
  accumulations of one tenth to three tenths of an inch expected.
  Snow late Wednesday night and Thursday, with total snow 
  accumulations of 3 to 5 inches. Winds gusting as high as 50 mph 
  late Wednesday night and Thursday.

* WHERE...Beadle, Jerauld and Brule Counties.

* WHEN...From 7 AM Wednesday to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Power outages and tree damage are likely 
  due to the ice. Travel could be nearly impossible. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible.

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

&&

$$

SDZ053-058-064-131030-
/O.UPG.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
/O.NEW.KFSD.WW.Y.0021.190313T1200Z-190315T0000Z/
Sanborn-Aurora-Douglas-
918 PM CDT Tue Mar 12 2019

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM WEDNESDAY TO 7 PM
CDT THURSDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 3 inches and ice accumulations of up to two tenths of an 
  inch expected. Winds gusting as high as 55 mph.

* WHERE...Sanborn, Aurora and Douglas Counties.

* WHEN...From 7 AM Wednesday to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving. 

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

&&

$$

SDZ039-040-054-055-059>061-065-068-131030-
/O.CON.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
Kingsbury-Brookings-Miner-Lake-Davison-Hanson-McCook-Hutchinson-
Bon Homme-
918 PM CDT Tue Mar 12 2019

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY EVENING...

* WHAT...Mixed precipitation possible late Wednesday night,
  changing to snow Thursday morning. Total snow accumulations of 
  up to two inches and ice accumulations of a light glaze 
  possible. Winds could gust as high as 55 mph on Thursday.

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

* WHEN...From late Wednesday night through Thursday evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow, sleet or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.

&&

$$
4 follow-up statements
264 
WWUS43 KFSD 130852
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
352 AM CDT Wed Mar 13 2019

SDZ038-050-052-057-063-131700-
/O.CON.KFSD.WS.W.0004.190313T1200Z-190315T0000Z/
Beadle-Gregory-Jerauld-Brule-Charles Mix-
352 AM CDT Wed Mar 13 2019

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 AM THIS MORNING
TO 7 PM CDT THURSDAY...

* WHAT...Freezing rain, mainly Wednesday morning, with ice
  accumulations of one tenth to one quarter of an inch expected.
  Rain is expected much of the day, before snow develops late
  Wednesday night and Thursday, with total snow accumulations of 3
  to 5 inches. Winds gusting as high as 55 mph late Wednesday 
  night and Thursday.

* WHERE...Beadle, Jerauld and Brule Counties.

* WHEN...From 7 AM Wednesday to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Power outages and tree damage are likely 
  due to the ice. Travel could be nearly impossible. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible.

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

&&

$$

SDZ053-058-064-131700-
/O.EXT.KFSD.WW.Y.0021.190314T0300Z-190315T0000Z/
Sanborn-Aurora-Douglas-
352 AM CDT Wed Mar 13 2019

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 10 PM THIS EVENING
TO 7 PM CDT THURSDAY...

* WHAT...Mixed precipitation expected. Rain for much of the day
  and evening, perhaps starting briefly as freezing rain. Brief
  freezing rain in transition to snow tonight. Total snow
  accumulations of 1 to 3 inches and ice accumulations of up to a
  tenth of an inch expected. Winds gusting as high as 55 mph.

* WHERE...Sanborn, Aurora and Douglas Counties.

* WHEN...From 10 PM this evening to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.

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

&&

$$

SDZ039-040-054-055-059>061-065-068-131700-
/O.CON.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
Kingsbury-Brookings-Miner-Lake-Davison-Hanson-McCook-Hutchinson-
Bon Homme-
352 AM CDT Wed Mar 13 2019

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
THURSDAY EVENING...

* WHAT...Mixed precipitation possible late Wednesday night,
  changing to snow Thursday morning. Total snow accumulations up
  to two to four inches and ice accumulations of a light glaze 
  possible. Winds could gust as high as 55 mph on Thursday.

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

* WHEN...From late Wednesday night through Thursday evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Areas of
  blowing snow could significantly reduce visibility. The
  hazardous conditions could impact the morning or evening
  commute. Gusty winds could bring down tree branches and cause
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow, sleet or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.

&&

$$
660 
WWUS43 KFSD 130952
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
452 AM CDT Wed Mar 13 2019

SDZ038-050-052-057-063-131800-
/O.CON.KFSD.WS.W.0004.190313T1200Z-190315T0000Z/
Beadle-Gregory-Jerauld-Brule-Charles Mix-
452 AM CDT Wed Mar 13 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM CDT
THURSDAY...

* WHAT...Freezing rain, mainly Wednesday morning, with ice 
  accumulations of one tenth to one quarter of an inch expected. 
  Rain is expected much of the day, before snow develops late 
  Wednesday night and Thursday, with total snow accumulations of 
  3 to 5 inches. Winds gusting as high as 55 mph late Wednesday 
  night and Thursday.

* WHERE...Beadle, Jerauld and Brule Counties.

* WHEN...From 7 AM Wednesday to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Power outages and tree damage are likely 
  due to the ice. Travel could be nearly impossible. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible.

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

&&

$$

SDZ053-058-064-131800-
/O.CON.KFSD.WW.Y.0021.190314T0300Z-190315T0000Z/
Sanborn-Aurora-Douglas-
452 AM CDT Wed Mar 13 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 7 PM CDT THURSDAY...

* WHAT...Mixed precipitation expected. Rain for much of the day 
  and evening, perhaps starting briefly as freezing rain. Brief 
  freezing rain in transition to snow tonight. Total snow 
  accumulations of 1 to 3 inches and ice accumulations of up to 
  a tenth of an inch expected. Winds gusting as high as 55 mph.

* WHERE...Sanborn, Aurora and Douglas Counties.

* WHEN...From 10 PM this evening to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.

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

&&

$$

IAZ001-012-MNZ071-072-080-089-097-098-NEZ013-SDZ056-062-066-067-
069>071-131800-
/O.EXB.KFSD.WS.A.0006.190314T1100Z-190315T0000Z/
Lyon IA-Sioux-Lincoln MN-Lyon MN-Murray-Nobles-Pipestone-Rock-
Dixon-Moody-Minnehaha-Turner-Lincoln SD-Yankton-Clay SD-Union-
452 AM CDT Wed Mar 13 2019

...WINTER STORM WATCH IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...

* WHAT...Blizzard conditions possible. Total snow accumulations of
  up to one to three inches. Winds could gust as high as 55 mph.

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

* WHEN...From Thursday morning through Thursday evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Areas of
  blowing snow could significantly reduce visibility. The
  hazardous conditions could impact the morning or evening
  commute, but most impactful during the later morning and
  afternoon. Gusty winds could bring down tree branches and cause
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch for blizzard conditions means there is a
potential for falling and/or blowing snow with strong winds and
extremely poor visibilities. This can lead to whiteout conditions
and make travel very dangerous. 

&&

$$

SDZ039-040-054-055-059>061-065-068-131800-
/O.CON.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
Kingsbury-Brookings-Miner-Lake-Davison-Hanson-McCook-Hutchinson-
Bon Homme-
452 AM CDT Wed Mar 13 2019

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
THURSDAY EVENING...

* WHAT...Mixed precipitation possible late Wednesday night,
  changing to snow Thursday morning. Blizzard conditions possible. Total
  snow accumulations up to two to four inches and ice 
  accumulations of a light glaze possible. Winds could gust as 
  high as 55 mph on Thursday.

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

* WHEN...From late Wednesday night through Thursday evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Areas 
  of blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches and cause 
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow, sleet or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.

&&

$$
614 
WWUS43 KFSD 131634
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
1134 AM CDT Wed Mar 13 2019


SDZ038-050-052-057-063-140045-
/O.CON.KFSD.WS.W.0004.000000T0000Z-190315T0000Z/
Beadle-Gregory-Jerauld-Brule-Charles Mix-
1134 AM CDT Wed Mar 13 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM CDT
THURSDAY...

* WHAT...Localized freezing rain into early afternoon with ice 
  accumulations of one tenth to one quarter of an inch expected. 
  Rain is expected much of the day, before snow develops late 
  Wednesday night and Thursday, with total snow accumulations of 3
  to 5 inches. Winds gusting as high as 55 mph late Wednesday 
  night and Thursday.

* WHERE...Beadle, Jerauld and Brule Counties.

* WHEN...From 7 AM Wednesday to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Power outages and tree damage are likely 
  due to the ice. Travel could be nearly impossible. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible.

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

&&

$$

SDZ053-058-064-140045-
/O.CON.KFSD.WW.Y.0021.190314T0300Z-190315T0000Z/
Sanborn-Aurora-Douglas-
1134 AM CDT Wed Mar 13 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 7 PM CDT THURSDAY...

* WHAT...Mixed precipitation expected. Rain for much of the day 
  and evening, perhaps starting briefly as freezing rain. Brief 
  freezing rain in transition to snow tonight. Total snow 
  accumulations of 1 to 3 inches and ice accumulations of up to 
  a tenth of an inch expected. Winds gusting as high as 55 mph.

* WHERE...Sanborn, Aurora and Douglas Counties.

* WHEN...From 10 PM this evening to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.

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

&&

$$

SDZ039-040-054-055-059>061-065-068-140045-
/O.CON.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
Kingsbury-Brookings-Miner-Lake-Davison-Hanson-McCook-Hutchinson-
Bon Homme-
1134 AM CDT Wed Mar 13 2019

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
THURSDAY EVENING...

* WHAT...Mixed precipitation possible late Wednesday night, 
  changing to snow Thursday morning. Blizzard conditions 
  possible. Total snow accumulations up to two to four inches 
  and ice accumulations of a light glaze possible. Winds could 
  gust as high as 55 mph on Thursday.

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

* WHEN...From late Wednesday night through Thursday evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Areas 
  of blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches and cause 
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow, sleet or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.

&&

$$

IAZ001-012-MNZ071-072-080-089-097-098-NEZ013-SDZ056-062-066-067-
069>071-140045-
/O.CON.KFSD.WS.A.0006.190314T1100Z-190315T0000Z/
Lyon IA-Sioux-Lincoln MN-Lyon MN-Murray-Nobles-Pipestone-Rock-
Dixon-Moody-Minnehaha-Turner-Lincoln SD-Yankton-Clay SD-Union-
1134 AM CDT Wed Mar 13 2019

...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY MORNING
THROUGH THURSDAY EVENING...

* WHAT...Blizzard conditions possible. Total snow accumulations 
  of up to one to three inches. Winds could gust as high as 55 
  mph.

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

* WHEN...From Thursday morning through Thursday evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Areas 
  of blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute, but most impactful during the later morning and 
  afternoon. Gusty winds could bring down tree branches and 
  cause power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch for blizzard conditions means there is a
potential for falling and/or blowing snow with strong winds and
extremely poor visibilities. This can lead to whiteout conditions
and make travel very dangerous.

&&

$$
647 
WWUS43 KFSD 132103
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
403 PM CDT Wed Mar 13 2019


SDZ053-058-064-140515-
/O.UPG.KFSD.WW.Y.0021.190314T0300Z-190315T0000Z/
/O.EXB.KFSD.WS.W.0004.190314T0600Z-190315T0000Z/
Sanborn-Aurora-Douglas-
403 PM CDT Wed Mar 13 2019

...WINTER STORM WARNING IN EFFECT FROM 1 AM TO 7 PM CDT
THURSDAY...

* WHAT...Brief mixed precipitation will change to snow late
  tonight. Total snow accumulations of 2 to 3 inches. Winds 
  gusting as high as 55 mph.

* WHERE...Sanborn, Aurora and Douglas Counties.

* WHEN...From 1 AM to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing snow means severe 
winter weather conditions will make travel very hazardous or 
impossible. 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.

&&

$$

SDZ059-140515-
/O.UPG.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
/O.EXB.KFSD.WS.W.0004.190314T0600Z-190315T0000Z/
Davison-
403 PM CDT Wed Mar 13 2019

...WINTER STORM WARNING IN EFFECT FROM 1 AM TO 7 PM CDT
THURSDAY...

* WHAT...Brief mixed precipitation will change to snow late
  tonight. Total snow accumulations of 2 to 3 inches. Winds 
  gusting as high as 55 mph.

* WHERE...Davison County.

* WHEN...From 1 AM to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing snow means severe 
winter weather conditions will make travel very hazardous or 
impossible. 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.

&&

$$

SDZ069-140515-
/O.UPG.KFSD.WS.A.0006.190314T1100Z-190315T0000Z/
/O.EXB.KFSD.WS.W.0004.190314T1200Z-190315T0000Z/
Yankton-
403 PM CDT Wed Mar 13 2019

...WINTER STORM WARNING IN EFFECT FROM 7 AM TO 7 PM CDT
THURSDAY...

* WHAT...Rain changing to snow. Total snow accumulations of up to
  two inches expected. Winds gusting as high as 55 mph.

* WHERE...Yankton County.

* WHEN...From 7 AM to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing snow means severe 
winter weather conditions will make travel very hazardous or 
impossible. 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.

&&

$$

SDZ039-054-060-065-068-140515-
/O.UPG.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
/O.EXB.KFSD.WS.W.0004.190314T1200Z-190315T0000Z/
Kingsbury-Miner-Hanson-Hutchinson-Bon Homme-
403 PM CDT Wed Mar 13 2019

...WINTER STORM WARNING IN EFFECT FROM 7 AM TO 7 PM CDT
THURSDAY...

* WHAT...Rain changing to snow. Total snow accumulations of up to
  two inches expected. Winds gusting as high as 55 mph.

* WHERE...Kingsbury, Miner, Hanson, Hutchinson and Bon Homme 
  Counties.

* WHEN...From 7 AM to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing snow means severe 
winter weather conditions will make travel very hazardous or 
impossible. 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.

&&

$$

SDZ038-050-052-057-063-140515-
/O.CON.KFSD.WS.W.0004.000000T0000Z-190315T0000Z/
Beadle-Gregory-Jerauld-Brule-Charles Mix-
403 PM CDT Wed Mar 13 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM CDT
THURSDAY...

* WHAT...Brief mixed precipitation will change to snow late
  tonight. Total snow accumulations of 2 to 3 inches. Winds
  gusting as high as 55 mph.

* WHERE...Charles Mix, Beadle, Brule, Jerauld and Gregory 
  Counties.

* WHEN...Until 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow and blowing snow means severe 
winter weather conditions will make travel very hazardous or 
impossible. 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.

&&

$$

IAZ001-012-MNZ071-072-080-089-097-098-NEZ013-SDZ056-062-066-067-
070-071-140515-
/O.UPG.KFSD.WS.A.0006.190314T1100Z-190315T0000Z/
/O.NEW.KFSD.WW.Y.0022.190314T1500Z-190315T0000Z/
Lyon IA-Sioux-Lincoln MN-Lyon MN-Murray-Nobles-Pipestone-Rock-
Dixon-Moody-Minnehaha-Turner-Lincoln SD-Clay SD-Union-
403 PM CDT Wed Mar 13 2019

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT
THURSDAY...

* WHAT...Brief mixed precipitation will change to snow on Thursday
  morning. Total snow accumulations of up to one inch. Winds 
  gusting as high as 55 mph.

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

* WHEN...From 10 AM to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain or blowing snow will cause travel difficulties. 
Expect slippery roads and limited visibilities, and use caution 
while driving. 

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

&&

$$

SDZ040-055-061-140515-
/O.UPG.KFSD.WS.A.0006.190314T0600Z-190315T0000Z/
/O.NEW.KFSD.WW.Y.0022.190314T1500Z-190315T0000Z/
Brookings-Lake-McCook-
403 PM CDT Wed Mar 13 2019

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT
THURSDAY...

* WHAT...Brief mixed precipitation will change to snow on Thursday
  morning. Total snow accumulations of 1 to 2 inches. Winds
  gusting as high as 55 mph.

* WHERE...Brookings, Lake and McCook Counties.

* WHEN...From 10 AM to 7 PM CDT Thursday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause extensive damage to trees 
  and power lines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain or blowing snow will cause travel difficulties. 
Expect slippery roads and limited visibilities, and use caution 
while driving. 

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 winter weather advisory 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 winter weather advisory went out at Mar 12, 5:53 PM CDT, 3 hours 25 minutes earlier.

Area forecast discussion, Mar 12, 5:53 PM CDT, 3 hours 25 minutes before
Area Forecast Discussion
National Weather Service Sioux Falls SD
553 PM CDT Tue Mar 12 2019

.UPDATE...
Issued at 545 PM CDT Tue Mar 12 2019

Have issued a dense fog advisory tonight along and east of the
James. Fog is expected to expand westward through the night as
moisture from the melting snow pack gets trapped in the near
surface layer. Fog may not improve till northerly winds kick in,
but issued through 18Z Wednesday as a starting point.

&&

.SHORT TERM...(This evening through Wednesday)
Issued at 332 PM CDT Tue Mar 12 2019

A robust and dynamic low currently evident on WV imagery spinning
over the desert southwest and will have a large impact on the
region over the next several days. In the very near term, a
subtle lead shortwave has resulted in shower moving east and
northeast thru areas mainly east of the I-29 corridor.

By tonight, the broad upper level trough begins to eject out into
the Central US with stout moisture return flow continuing. This
will likely lead to fog development/expansion this evening and
overnight and is already quite widespread to our south. Isentropic
lift will also increase thru the night. This combined with some
elevated instability (mainly south of I-90) will lead to an
initial round of precipitation before/around the daybreak hours
Wednesday. Quick behind we'll see a second reinforcing and broader
round of precipitation filling in thru the day Wednesday from
south to north as better lift and upper level support arrives.

By Wednesday evening, surface low lifts into south central KS with
better isentropic forcing and DivQ focused more along/west of the
James River. Thus could see precipitation drop off to more of a
drizzle further to the east as deeper moisture is temporally
lost.

As the surface low moves into southeast Neb Wednesday night into
Thursday, several things begin to happen. First, the surface
pressure gradient begins to tighten with north/northwesterly winds
increasing. Second, an area of strong frontogenesis in the 925:700
mb layer will cause a secondary band of precipitation, with
models currently favoring the James River Valley currently before
the TROWAL precip overtakes it. Third, cold air begins to crash in
from west to east leading to precip type questions.

The surface low continues to pull to the north and east thru the
day Thursday with fading lift and thus fading precip chances,
although light snow is possible into at least the evening hours.

Winter Weather: Forecast soundings and MaxTw aloft continue to
point to mainly liquid precipitation but the concern would be from
areas near Chamberlain to Huron where cold air on the west side of
the inverted trough may hold tight for a period Wednesday morning
to allow for freezing rain. Model surface temperatures and wet
bulbs have generally been on a warming trend lately but a degree
or two change in temperature will make all the difference on ice
amounts with plenty of QPF to work with.

Next winter weather concern will be Thursday as cold air filters
back in and eventually changes things back to snow from west to
east across the CWA. Again, the previously mentioned secondary
band of precipitation Thursday morning could lead to locally
higher amounts, although precip type at this time is still very
uncertain.

Rain/Flooding: Total liquid equivalent with this system continue
to look impressive with a broad area of 1 to 2 inches across most
areas, perhaps locally higher if some enhanced rates are achieved.
This will no doubt cause issues in low lying and poor drainage
areas.

Winds: NAEFS guidance continues to point to surface pressure and
850 mb winds nearing or hitting climatological records for the
date. Soundings also continue to show winds at the top of the
mixed layer of at least 50 kts, perhaps higher. Kept winds at the
higher end of guidance as some wind gusts in the 50-60+ mph range
certainly look possible Thursday. Any amount of falling snow will
cause significant issues Thursday with those wind speeds.

Headlines: With low confidence in the freezing rain risk
(temperatures hovering right around freezing) early Wednesday
across our far western counties, only converted a narrow ribbon
over to Winter Storm Warnings. Will let future shifts take another
look at temperature trends and determine if the warning or
additional advisories are need further east to icing. Also
decided to expand the Winter Storm Watch further to the east to
address the significant risk of blowing snow and possible near
blizzard conditions on Thursday. The Flood Watch was also expanded
to the rest of our counties with plenty of rain expected.

.LONG TERM...(Wednesday night through Tuesday)
Issued at 332 PM CDT Tue Mar 12 2019

Any lingering snow will be on the decrease Thursday night with
winds also fading slowly Thursday night and Friday.

With active weather in the short term, no changes were made to the
blended model guidance in the extended. In general, it looks like
thing quiet down again into the weekend, with temperatures
generally running near or a little below normal.

&&

.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 1216 PM CDT Tue Mar 12 2019

Conditions will become increasingly worse by evening as ceilings
and visibilities lower into the LIFR range as fog develops across
the area. Rain will develop later tonight and overspread the area
on Wednesday, becoming increasingly heavy. With winds increasing
aloft, low level wind shear will occur at KSUX later this evening
into Wednesday.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...Flood Watch from Wednesday morning through Thursday evening for
     SDZ062>071.

     Dense Fog Advisory until 1 PM CDT Wednesday for SDZ038>040-
     053>056-059>062-065>071.

     Winter Storm Watch from late Wednesday night through Thursday
     evening for SDZ039-040-050-053>055-058>061-063>065-068.

     Flood Watch from Wednesday morning through Thursday evening for
     SDZ038>040-050-052>061.

     Winter Storm Warning from 7 AM Wednesday to 7 PM CDT Thursday
     for SDZ038-052-057.

MN...Flood Watch from Wednesday morning through Thursday evening for
     MNZ089-090-098.

     Dense Fog Advisory until 1 PM CDT Wednesday for MNZ071-072-080-
     081-089-090-097-098.

     Flood Watch from Wednesday morning through Thursday evening for
     MNZ071-072-080-081-097.

IA...Flood Watch from Wednesday morning through Thursday evening for
     IAZ001>003-012>014-020>022-031-032.

     Dense Fog Advisory until 1 PM CDT Wednesday for IAZ001>003-
     012>014-020>022-031-032.

NE...Flood Watch from Wednesday morning through Thursday evening for
     NEZ013-014.

     Dense Fog Advisory until 1 PM CDT Wednesday for NEZ013-014.

&&

UPDATE...BT
SHORT TERM...Kalin
LONG TERM...Kalin
AVIATION...JM
Hazardous weather outlook, Mar 12, 3:45 AM CDT, 17 hours 33 minutes before
Hazardous Weather Outlook
National Weather Service Sioux Falls SD
345 AM CDT Tue Mar 12 2019

SDZ038-050-052-053-057>059-063-064-130845-
Beadle-Gregory-Jerauld-Sanborn-Brule-Aurora-Davison-Charles Mix-
Douglas-
345 AM CDT Tue Mar 12 2019

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

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

A very strong storm system will work onto the Plains today and
slowly work northeast through Thursday. This will bring a threat
for freezing rain late tonight into Wednesday morning. The threat
for snow and additional freezing rain will continue into
Wednesday night as north winds increase, with gusts to 60 mph
possible. The combination of wind gusts around 60 mph and either
freezing rain or snow will be very impactful. Please continue to
monitor the forecast, especially if you have travel plans on
Wednesday or Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ039-040-054>056-060>062-065>071-130845-
Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln MN-Lyon MN-Murray-Cottonwood-
Nobles-Jackson-Pipestone-Rock-Dixon-Dakota-Kingsbury-Brookings-
Miner-Lake-Moody-Hanson-McCook-Minnehaha-Hutchinson-Turner-
Lincoln SD-Bon Homme-Yankton-Clay SD-Union-
345 AM CDT Tue Mar 12 2019

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

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Moderate to heavy rainfall will spread across the area on
Wednesday which could lead towards flooding of roads and rises in
local creeks, streams and rivers. Late Wednesday night into
Thursday morning very strong winds of 50 to 60 mph may also
combine with with rain and snow to create very hazardous
conditions. Confidence on the snow and wind Thursday is marginal
but if one to three inches of snow falls Thursday with wind gusts
around 60 mph highly dangerous conditions will be likely.

Now is a good time to prepare for the heavy rain by clearing
drains around homes and businesses as well as storm drains along
roads and highways. Please continue to monitor the forecast in
case the threat for wintry precipitation shifts east. Any travel
planned on Wednesday will be hampered by poor weather conditions,
especially in the afternoon and at night west of Interstate 29 and
Thursday could also prove to be a dangerous travel day.

.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
Mar 13, 6:58 AM CDTRiver Flood WarningFSDUnion21 days
Mar 13, 8:34 AM CDTAreal Flood WarningFSDBon Homme, Clay, Union, Yankton12 hr
Mar 13, 11:04 AM CDTRiver Flood WarningFSDMinnehaha4 days
Mar 13, 11:04 AM CDTRiver Flood WarningFSDHutchinson, Yankton98 days
Mar 13, 11:04 AM CDTRiver Flood WarningFSDClay15 days
Mar 13, 11:04 AM CDTRiver Flood WarningFSDLincoln, Minnehaha4 days
Mar 13, 11:04 AM CDTRiver Flood WarningFSDUnion90 days
Mar 13, 11:04 AM CDTRiver Flood WarningFSDUnion94 days
Mar 13, 12:22 PM CDTRiver Flood WarningFSDLincoln, Minnehaha49 hr
Mar 13, 12:55 PM CDTAreal Flood WarningFSDDavison, Douglas, Hanson, Hutchinson, Lincoln, McCook and 2 more12 hr
Mar 13, 2:57 PM CDTRiver Flood WarningFSDLincoln, Minnehaha21 days
Mar 13, 4:03 PM CDTWinter Weather AdvisoryFSDAurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 18 more27 hr
Mar 13, 4:06 PM CDTWind AdvisoryFSDAurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 18 more36 hr
Mar 13, 5:12 PM CDTRiver Flood WarningFSDYankton93 days
Mar 13, 5:12 PM CDTRiver Flood WarningFSDTurner14 days
Mar 13, 5:12 PM CDTRiver Flood WarningFSDClay13 days
Mar 13, 5:12 PM CDTRiver Flood WarningFSDMinnehaha21 days
Mar 13, 5:59 PM CDTAreal Flood WarningFSDBeadle, Brookings, Kingsbury, Lake, Miner, Moody and 1 more12 hr
Mar 13, 6:08 PM CDTRiver Flood WarningFSDTurner13 days
Mar 13, 6:42 PM CDTDense Fog AdvisoryFSDLincoln, Minnehaha12 hr

Nearby

Winter Weather Advisories in South Dakota, 2019Every winter weather advisory 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.