Winter Storm Warning 4, NWS Sioux Falls, SD

096 
WWUS43 KFSD 160229
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
929 PM CDT Thu Mar 15 2018


SDZ050-057-058-063>065-068-069-161030-
/O.CON.KFSD.WS.W.0004.180316T1000Z-180317T0600Z/
Gregory-Brule-Aurora-Charles Mix-Douglas-Hutchinson-Bon Homme-
Yankton-
929 PM CDT Thu Mar 15 2018

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM FRIDAY TO
1 AM CDT SATURDAY...

* WHAT...Heavy mixed precipitation expected. Total snow 
  accumulations of 2 to 4 inches and ice accumulations of one 
  tenth to three tenths of an inch are expected.

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

* WHEN...From 5 AM Friday to 1 AM CDT Saturday.

* ADDITIONAL DETAILS...Power outages and tree damage are 
  possible due to the ice. Travel will be dangerous including 
  during the morning commute on Friday. Be prepared for 
  significant reductions in visibility at times.

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.

&&

$$

IAZ020-031-032-NEZ013-014-SDZ052-053-059-060-066-070-071-161030-
/O.CON.KFSD.WW.Y.0014.180316T1500Z-180317T0600Z/
Plymouth-Woodbury-Ida-Dixon-Dakota-Jerauld-Sanborn-Davison-Hanson-
Turner-Clay SD-Union-
929 PM CDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 AM FRIDAY TO
1 AM CDT SATURDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 2 to 4 inches and ice accumulations of one tenth to two 
  tenths of an inch are expected.

* WHERE...Jerauld, Sanborn, Davison, Hanson and Turner Counties.

* WHEN...From 10 AM Friday to 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions. Be prepared for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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>003-012>014-021-022-MNZ089-090-098-SDZ038-039-054>056-061-
062-067-161030-
/O.CON.KFSD.WW.Y.0014.180316T1800Z-180317T0600Z/
Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Cherokee-
Buena Vista-Nobles-Jackson-Rock-Beadle-Kingsbury-Miner-Lake-Moody-
McCook-Minnehaha-Lincoln SD-
929 PM CDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM FRIDAY TO
1 AM CDT SATURDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 2 to 4 inches and ice accumulations of up to one tenth of 
  an inch are expected.

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

* WHEN...From 1 PM Friday to 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions. Be prepared for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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.

&&

$$

720 
WWUS43 KFSD 160838
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
338 AM CDT Fri Mar 16 2018

SDZ050-057-058-063>065-068-069-161645-
/O.CON.KFSD.WS.W.0004.180316T1000Z-180317T0600Z/
Gregory-Brule-Aurora-Charles Mix-Douglas-Hutchinson-Bon Homme-
Yankton-
338 AM CDT Fri Mar 16 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Heavy mixed precipitation expected. Total snow 
  accumulations of 2 to 4 inches, with localized amounts up to 6 
  inches, and ice accumulations of one tenth to three tenths of 
  an inch are expected.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...Power outages and tree damage are likely
  due to the ice. Travel will be dangerous and nearly impossible,
  including during the evening commute. Be prepared for 
  significant reductions in visibility at times.

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.

&&

$$

IAZ020-031-032-NEZ013-014-SDZ052-053-059-060-066-070-071-161645-
/O.CON.KFSD.WW.Y.0014.180316T1500Z-180317T0600Z/
Plymouth-Woodbury-Ida-Dixon-Dakota-Jerauld-Sanborn-Davison-Hanson-
Turner-Clay SD-Union-
338 AM CDT Fri Mar 16 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 AM THIS
MORNING TO 1 AM CDT SATURDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations
  from less than 2 inches south of Highway 18, up to 3 to 5 inches
  toward Mitchell. Ice accumulations of up to two tenths of an
  inch are possible, but will be highly dependent on temperature.

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

* WHEN...From 10 AM this morning to 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice and snow will result in difficult 
  travel conditions. Be prepared for reduced visibilities at 
  times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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>003-012>014-021-022-MNZ089-090-098-SDZ038-039-054>056-061-
062-067-161645-
/O.CON.KFSD.WW.Y.0014.180316T1800Z-180317T0600Z/
Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Cherokee-
Buena Vista-Nobles-Jackson-Rock-Beadle-Kingsbury-Miner-Lake-Moody-
McCook-Minnehaha-Lincoln SD-
338 AM CDT Fri Mar 16 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 1 AM CDT SATURDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  1 to 3 inches, with localized amounts up to 4 inches, and ice 
  accumulations of up to one tenth of an inch are expected.

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

* WHEN...From 1 PM this afternoon to 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice and snow will result in difficult 
  travel conditions. Be prepared for reduced visibilities at 
  times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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.

&&

$$

928 
WWUS43 KFSD 161531
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
1031 AM CDT Fri Mar 16 2018

SDZ050-057-058-063>065-068-069-162345-
/O.CON.KFSD.WS.W.0004.000000T0000Z-180317T0600Z/
Gregory-Brule-Aurora-Charles Mix-Douglas-Hutchinson-Bon Homme-
Yankton-
1031 AM CDT Fri Mar 16 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Heavy mixed precipitation. Additional snow accumulations
  of 2 to 4 inches and additional ice accumulations of one tenth 
  to three tenths of an inch are expected.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...Power outages and tree damage are possible
  due to the ice. Roads will become icy and dangerous. After
  precipitation changes to snow this afternoon, be prepared for 
  significant reductions in visibility at times.

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.

&&

$$

IAZ020-031-032-NEZ013-014-SDZ052-053-059-060-066-070-071-162345-
/O.CON.KFSD.WW.Y.0014.000000T0000Z-180317T0600Z/
Plymouth-Woodbury-Ida-Dixon-Dakota-Jerauld-Sanborn-Davison-Hanson-
Turner-Clay SD-Union-
1031 AM CDT Fri Mar 16 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Mixed precipitation. Snow accumulations of up to 2
  inches, with localized amounts up to 4 inches west of the James
  River. Ice accumulations will range from a glaze around Sioux
  City to over a tenth of an inch around Mitchell and Chamberlain.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice and snow will result in difficult 
  travel conditions. Be prepared for reduced visibilities at 
  times after precipitation changes to snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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>003-012>014-021-022-MNZ089-090-098-SDZ038-039-054>056-061-
062-067-162345-
/O.CON.KFSD.WW.Y.0014.180316T1800Z-180317T0600Z/
Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Cherokee-
Buena Vista-Nobles-Jackson-Rock-Beadle-Kingsbury-Miner-Lake-Moody-
McCook-Minnehaha-Lincoln SD-
1031 AM CDT Fri Mar 16 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Mixed precipitation expected. Total wet snow
  accumulations of up to 2 inches and ice accumulations of less
  than one tenth of an inch are expected.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice will glaze elevated surfaces and
  may result in icy patches on roads creating difficult travel 
  conditions. Snowfall later this afternoon and evening will 
  reduce the visibility to less than one mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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.

&&

$$

Schumacher

529 
WWUS43 KFSD 162253
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
553 PM CDT Fri Mar 16 2018

SDZ050-057-058-063>065-068-069-170600-
/O.CON.KFSD.WS.W.0004.000000T0000Z-180317T0600Z/
Gregory-Brule-Aurora-Charles Mix-Douglas-Hutchinson-Bon Homme-
Yankton-
553 PM CDT Fri Mar 16 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Additional snow and sleet accumulations of 1 to 2 inches
  and ice accumulations of one tenth to two tenths of an inch are
  expected.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the evening commute. Be prepared for 
  significant reductions in visibility at times.

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.

&&

$$

IAZ020-031-032-NEZ013-014-SDZ052-053-059-060-066-070-071-170600-
/O.CON.KFSD.WW.Y.0014.000000T0000Z-180317T0600Z/
Plymouth-Woodbury-Ida-Dixon-Dakota-Jerauld-Sanborn-Davison-Hanson-
Turner-Clay SD-Union-
553 PM CDT Fri Mar 16 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Snow and sleet will transition to freezing drizzle this
  evening. Additional snow and sleet accumulations of up to one 
  inch and ice accumulations of one tenth to two tenths of an inch
  are expected.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions, including during the evening commute. Be prepared 
  for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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>003-012>014-021-022-MNZ089-090-098-SDZ038-039-054>056-061-
062-067-170600-
/O.CON.KFSD.WW.Y.0014.000000T0000Z-180317T0600Z/
Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Cherokee-
Buena Vista-Nobles-Jackson-Rock-Beadle-Kingsbury-Miner-Lake-Moody-
McCook-Minnehaha-Lincoln SD-
553 PM CDT Fri Mar 16 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Rain is expected to mix with and change to sleet and
  snow, before diminishing to freezing drizzle late this evening.
  Additional snow and sleet accumulations of up to two inches and
  ice accumulations of up to one tenth of an inch are expected.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions. Be prepared for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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.

&&

$$

991 
WWUS43 KFSD 170318
WSWFSD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sioux Falls SD
1018 PM CDT Fri Mar 16 2018

SDZ050-057-058-063>065-068-069-170430-
/O.CAN.KFSD.WS.W.0004.000000T0000Z-180317T0600Z/
Gregory-Brule-Aurora-Charles Mix-Douglas-Hutchinson-Bon Homme-
Yankton-
1018 PM CDT Fri Mar 16 2018

...WINTER STORM WARNING IS CANCELLED...

The majority of mixed precipitation has ended for the warning area.
Periods of light freezing drizzle are possible through the 
overnight hours, but additional accumulations are expected to be 
minimal. Continue to exercise caution when traveling on ice and 
snow covered surfaces.

$$

IAZ020-031-032-NEZ013-014-SDZ052-053-059-060-066-070-071-170600-
/O.CON.KFSD.WW.Y.0014.000000T0000Z-180317T0600Z/
Plymouth-Woodbury-Ida-Dixon-Dakota-Jerauld-Sanborn-Davison-Hanson-
Turner-Clay SD-Union-
1018 PM CDT Fri Mar 16 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Mixed precipitation. Additional wet snow accumulations 
  of up to one half inch and ice accumulations of up to one 
  tenth of an inch are expected.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions. Be prepared for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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>003-012>014-021-022-MNZ089-090-098-SDZ038-039-054>056-061-
062-067-170600-
/O.CON.KFSD.WW.Y.0014.000000T0000Z-180317T0600Z/
Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Cherokee-
Buena Vista-Nobles-Jackson-Rock-Beadle-Kingsbury-Miner-Lake-Moody-
McCook-Minnehaha-Lincoln SD-
1018 PM CDT Fri Mar 16 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT
SATURDAY...

* WHAT...Mixed precipitation. Additional wet snow accumulations 
  of up to one inch and ice accumulations of up to one tenth of 
  an inch are expected.

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

* WHEN...Until 1 AM CDT Saturday.

* ADDITIONAL DETAILS...The ice will result in difficult travel 
  conditions. Be prepared for reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
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.

&&

$$

Area Forecast Discussion
National Weather Service Sioux Falls SD
1226 PM CDT Thu Mar 15 2018

.SHORT TERM...(Today through Friday night)
Issued at 415 AM CDT Thu Mar 15 2018

Not much of concern through this evening. Easterly flow will
increase a bit through the day, and this along with areas of high
clouds will keep temperatures cooler than yesterday, with highs from
the mid 30s in southwest MN to near 50 around Sioux City.

Late tonight through Friday night will be the period of greatest
concern with this forecast. Models have come into better agreement
on the overall timing/track of the system set to impact the region
during this time, though still minor variability in exact location
of the circulation center, and the associated thermal profiles which
could greatly impact precipitation type through the period.

In general, mid-upper trough and associated surface low will swing
out of the central Rockies into western Kansas/Nebraska by late
tonight, then slide east near the Kansas/Nebraska border through
the day Friday. Ample moisture and streaming into the Missouri River
Valley ahead of the low by late tonight/early Friday, gradually
expanding northeast to about a KHON-KFSD-KSPW line by midday, and
over most of the CWA by late afternoon. Fairly narrow ribbon of very
strong lift along the mid-level front will likewise lift northeast
through the day, followed by drying aloft which could transition any
substantial snow and/or freezing rain threat over freezing drizzle.

Some questions remain regarding precip type and potential impacts:
1. Surface air temperatures, especially south of I-90, could be near
or even slightly above freezing, limiting impact of potential icing.
2. Likewise, road temperatures across our southern areas are above
freezing based on current road sensor observations. With another
mild day today and air temperatures remaining near freezing tonight,
see no reason why these areas would see road temperatures drop below
freezing. This, too, could limit the impact of potential icing, at
least for travel concerns. Could still see some ice accretion on
elevated objects/trees/power lines, though.
3. Forecast soundings from both GFS and NAM maintain a warm layer
around 825-850mb in areas east of the James River Valley through
much of the day Friday. Location and just how warm this layer is
will ultimately impact precip type and amounts of snow/sleet/ice.

Despite the above questions, concern for travel impacts is high
enough this morning to issue headlines for parts of the area. Opted
for a Winter Storm Watch from south central SD, eastward along the
Missouri River Valley to Dixon County Nebraska. This area appears
most likely to see significant icing threat, though air and road
temperatures could impact eventual ice accumulations as mentioned
above. Northeast of this area, confidence in a band of moderate snow
(2-4") and/or light ice accumulations warrants a Winter Weather
Advisory from Huron/Mitchell, eastward toward Sioux Falls and
Worthington.

Far northeast parts of the forecast area (including Brookings,
Marshall and Windom) not likely to see much more than light snow,
or possibly a light glaze of ice if snow turns over to freezing
drizzle before ending Friday night.

Southeast parts of the forecast area (including Sioux City, Spencer
and Storm Lake) could see some icing, but impacts will be dependent
on those road and air temperatures, especially since much of the
precipitation will be occurring during daylight hours when the
increasing sun angle can also have a melting effect, even through
thick cloud cover. Thus, opted to not issue any headlines for that
area at this time, despite having a mention of ice accumulations in
the forecast.

Thanks to all of our surrounding offices and WPC for the extensive
collaboration on a difficult forecast this morning!

.LONG TERM...(Saturday through Wednesday)
Issued at 415 AM CDT Thu Mar 15 2018

System expected to be east of the forecast area by early
Saturday, and weak ridging will provide warmer, but still below
normal temperatures across the region through the weekend.

Next trough will slide out of the Rockies into the Plains late
Sunday into the early part of the work week. Focus on Friday did not
allow for in-depth interrogation of this next system, but despite
some timing differences, models generally agree on this system
bringing another shot of rain changing to snow across the region
early next week.

Temperatures show a slight upward trend again toward the middle of
next week with dry conditions by the end of this forecast period,
though extent of warming will initially depend on how much snow is
received over the next several days.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1219 PM CDT Thu Mar 15 2018

East winds will continue to slowly increase over the next 24
hours. During the morning hours Friday, freezing rain will move
in from the southwest. KSUX looks to be the first TAF site
impacted, with patchy freezing drizzle around sunrise, with more
widespread freezing rain starting by late morning. Other areas
northwest, northeast, and east of KSUX will likely see sleet,
snow and freezing rain begin around noon or shortly thereafter.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...Winter Weather Advisory from 7 AM Friday to 1 AM CDT Saturday
     for SDZ038-039-052>056-058>062-066-067.

     Winter Storm Watch from late tonight through late Friday night
     for SDZ050-057-063>065-068>070.

MN...Winter Weather Advisory from 7 AM Friday to 1 AM CDT Saturday
     for MNZ089-098.

IA...Winter Weather Advisory from 7 AM Friday to 1 AM CDT Saturday
     for IAZ001-002.

NE...Winter Storm Watch from late tonight through late Friday night
     for NEZ013.

&&

SHORT TERM...JH
LONG TERM...JH
AVIATION...VandenBoogart

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
446 AM CDT Thu Mar 15 2018

NEZ013-SDZ050-057-063>065-068>070-161000-
Dixon-Gregory-Brule-Charles Mix-Douglas-Hutchinson-Bon Homme-
Yankton-Clay SD-
446 AM CDT Thu Mar 15 2018

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

.DAY ONE...Today and Tonight

A wintry mix of precipitation will begin late tonight. Light icing
is possible by daybreak Friday, especially in south central South
Dakota.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A wintry mix of precipitation will continue through the day Friday,
gradually ending west to east Friday night. Ice accumulations
greater than a tenth of an inch, along with light snow amounts,
are possible, though any ice and snow accumulation will greatly
depend on temperatures, which may be very near the freezing mark.

Another weather system could bring a mix of rain and snow to the
region early next week. However, there is too much uncertainty to
specify timing or potential amounts at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

IAZ001-002-MNZ089-098-SDZ038-039-052>056-058>062-066-067-161000-
Lyon IA-Osceola-Nobles-Rock-Beadle-Kingsbury-Jerauld-Sanborn-
Miner-Lake-Moody-Aurora-Davison-Hanson-McCook-Minnehaha-Turner-
Lincoln SD-
446 AM CDT Thu Mar 15 2018

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

.DAY ONE...Today and Tonight

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A wintry mix of snow and freezing rain will affect the region
Friday into Friday night. Although the amount of snow and ice
will depend greatly on temperatures, both surface and aloft, at
this time it appears that moderate snow accumulations, along
with ice accumulations less than a tenth of an inch, will be
possible.

Another weather system could bring a mix of rain and snow to the
region early next week. However, there is too much uncertainty to
specify timing or potential amounts at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

IAZ012>014-020>022-031-032-NEZ014-SDZ071-161000-
Sioux-O'Brien-Clay IA-Plymouth-Cherokee-Buena Vista-Woodbury-Ida-
Dakota-Union-
446 AM CDT Thu Mar 15 2018

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

.DAY ONE...Today and Tonight

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A wintry mix of mainly rain or freezing rain will affect the
region Friday into Friday night. The amount of ice will depend
greatly on temperatures, both surface and aloft. However, at this
time, it appears that at least some ice accumulation will be
possible, especially on untreated or elevated surfaces.

Another weather system could bring a mix of rain and snow to the
region early next week. However, there is too much uncertainty to
specify timing or potential amounts at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

IAZ003-MNZ071-072-080-081-090-097-SDZ040-161000-
Dickinson-Lincoln MN-Lyon MN-Murray-Cottonwood-Jackson-Pipestone-
Brookings-
446 AM CDT Thu Mar 15 2018

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

.DAY ONE...Today and Tonight

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A wintry mix of light snow or freezing drizzle will affect the
region Friday afternoon into Friday night. Although the amount of
snow and ice will depend greatly on temperatures, both surface
and aloft, at this time it appears that light snow accumulations,
along with a light glaze of ice will be possible.

Another weather system could bring a mix of rain and snow to the
region early next week. However, there is too much uncertainty to
specify timing or potential amounts at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.