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Severe Thunderstorm Warning


Severe Weather Statement
National Weather Service Sioux Falls SD
1208 PM CDT MON AUG 21 2017

SDC003-023-035-043-053-067-211745-
/O.CON.KFSD.SV.W.0230.000000T0000Z-170821T1745Z/
Davison SD-Aurora SD-Charles Mix SD-Gregory SD-Douglas SD-
Hutchinson SD-
1208 PM CDT MON AUG 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR SOUTHERN DAVISON...SOUTHERN AURORA...EASTERN CHARLES MIX...
SOUTHEASTERN GREGORY...DOUGLAS AND WESTERN HUTCHINSON COUNTIES...

At 1207 PM CDT, severe thunderstorms were located along a line
extending from near Stickney to 6 miles west of Armour to 10 miles
east of Bonesteel, moving east at 40 mph.

HAZARD...Two inch hail and 70 mph wind gusts.

SOURCE...Public. At 12:05 PM CDT, golf ball size hail was reported
         2 miles south of Aurora Center.

IMPACT...People and animals outdoors will be injured. Expect hail
         damage to roofs, siding, windows, and vehicles. Expect
         considerable tree damage. Wind damage is also likely to
         mobile homes, roofs, and outbuildings.

These severe storms will be near...
  Armour around 1215 PM CDT.
  Pickstown around 1225 PM CDT.
  Delmont around 1230 PM CDT.
  Marty around 1235 PM CDT.
  Dimock around 1240 PM CDT.
  Parkston, Tripp and Dante around 1245 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 4339 9865 4359 9870 4360 9814 4352 9797
      4350 9796 4349 9789 4322 9795 4317 9801
      4317 9808 4308 9811 4292 9828 4299 9850
      4300 9850 4310 9893
TIME...MOT...LOC 1707Z 292DEG 36KT 4351 9845 4333 9847 4309 9875

HAIL...2.00IN
WIND...70MPH

$$

Schumacher

Severe Weather Statement
National Weather Service Sioux Falls SD
1152 AM CDT MON AUG 21 2017

SDC003-015-023-043-053-211715-
/O.CON.KFSD.SV.W.0229.000000T0000Z-170821T1715Z/
Aurora SD-Charles Mix SD-Gregory SD-Douglas SD-Brule SD-
1152 AM CDT MON AUG 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR SOUTHWESTERN AURORA...NORTHWESTERN CHARLES MIX...SOUTHERN
GREGORY...NORTHERN DOUGLAS AND SOUTHEASTERN BRULE COUNTIES...

At 1151 AM CDT, severe thunderstorms were located along a line
extending from near Aurora Center to 7 miles north of Bonesteel,
moving east at 40 mph.

These are very dangerous storms.

HAZARD...Three inch hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be severely injured.
         Expect shattered windows, extensive damage to roofs,
         siding, and vehicles.

These severe storms will be near...
  New Holland and Aurora Center around 1200 PM CDT.
  Harrison around 1205 PM CDT.
  Geddes around 1210 PM CDT.
  Corsica around 1215 PM CDT.

Other locations impacted by these severe thunderstorms include
Fairfax.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

These are dangerous storms. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

&&

LAT...LON 4344 9822 4300 9871 4300 9902 4315 9931
      4362 9891
TIME...MOT...LOC 1651Z 280DEG 35KT 4350 9868 4318 9900

HAIL...3.00IN
WIND...70MPH

$$

Schumacher


Severe Weather Statement


Severe Weather Statement
National Weather Service Sioux Falls SD
1208 PM CDT MON AUG 21 2017

SDC003-023-035-043-053-067-211745-
/O.CON.KFSD.SV.W.0230.000000T0000Z-170821T1745Z/
Davison SD-Aurora SD-Charles Mix SD-Gregory SD-Douglas SD-
Hutchinson SD-
1208 PM CDT MON AUG 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR SOUTHERN DAVISON...SOUTHERN AURORA...EASTERN CHARLES MIX...
SOUTHEASTERN GREGORY...DOUGLAS AND WESTERN HUTCHINSON COUNTIES...

At 1207 PM CDT, severe thunderstorms were located along a line
extending from near Stickney to 6 miles west of Armour to 10 miles
east of Bonesteel, moving east at 40 mph.

HAZARD...Two inch hail and 70 mph wind gusts.

SOURCE...Public. At 12:05 PM CDT, golf ball size hail was reported
         2 miles south of Aurora Center.

IMPACT...People and animals outdoors will be injured. Expect hail
         damage to roofs, siding, windows, and vehicles. Expect
         considerable tree damage. Wind damage is also likely to
         mobile homes, roofs, and outbuildings.

These severe storms will be near...
  Armour around 1215 PM CDT.
  Pickstown around 1225 PM CDT.
  Delmont around 1230 PM CDT.
  Marty around 1235 PM CDT.
  Dimock around 1240 PM CDT.
  Parkston, Tripp and Dante around 1245 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 4339 9865 4359 9870 4360 9814 4352 9797
      4350 9796 4349 9789 4322 9795 4317 9801
      4317 9808 4308 9811 4292 9828 4299 9850
      4300 9850 4310 9893
TIME...MOT...LOC 1707Z 292DEG 36KT 4351 9845 4333 9847 4309 9875

HAIL...2.00IN
WIND...70MPH

$$

Schumacher


Severe Thunderstorm Watch


WATCH COUNTY NOTIFICATION FOR WATCHES 459/460
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1134 AM CDT MON AUG 21 2017

SDC003-015-023-035-043-053-073-111-211900-
/O.CON.KFSD.SV.A.0459.000000T0000Z-170821T1900Z/

SEVERE THUNDERSTORM WATCH 459 REMAINS VALID UNTIL 2 PM CDT THIS
AFTERNOON FOR THE FOLLOWING AREAS

IN SOUTH DAKOTA THIS WATCH INCLUDES 8 COUNTIES

IN CENTRAL SOUTH DAKOTA

JERAULD

IN EAST CENTRAL SOUTH DAKOTA

SANBORN

IN SOUTH CENTRAL SOUTH DAKOTA

AURORA                BRULE                 CHARLES MIX
DOUGLAS               GREGORY

IN SOUTHEAST SOUTH DAKOTA

DAVISON

$$

WATCH COUNTY NOTIFICATION FOR WATCH 459
NATIONAL WEATHER SERVICE RAPID CITY SD
1033 AM MDT MON AUG 21 2017

SDC123-211900-
/O.CON.KUNR.SV.A.0459.000000T0000Z-170821T1900Z/

SEVERE THUNDERSTORM WATCH 459 REMAINS VALID UNTIL 2 PM CDT THIS
AFTERNOON FOR THE FOLLOWING AREAS

IN SOUTH DAKOTA THIS WATCH INCLUDES 1 COUNTY

IN SOUTH CENTRAL SOUTH DAKOTA

TRIPP

THIS INCLUDES THE CITIES OF CLEARFIELD, IDEAL, AND WINNER.

$$

SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 460
NWS STORM PREDICTION CENTER NORMAN OK
1135 AM CDT MON AUG 21 2017

SEVERE THUNDERSTORM WATCH 460 IS IN EFFECT UNTIL 700 PM CDT
FOR THE FOLLOWING LOCATIONS

NEC003-015-021-027-039-043-051-089-103-107-119-139-149-167-173-
179-220000-
/O.NEW.KWNS.SV.A.0460.170821T1635Z-170822T0000Z/

NE
.    NEBRASKA COUNTIES INCLUDED ARE

ANTELOPE             BOYD                BURT
CEDAR                CUMING              DAKOTA
DIXON                HOLT                KEYA PAHA
KNOX                 MADISON             PIERCE
ROCK                 STANTON             THURSTON
WAYNE
$$


Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1055 AM MDT Mon Aug 21 2017

COZ030>051-221700-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1055 AM MDT Mon Aug 21 2017

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

Isolate thunderstorms will develop this afternoon, mainly along
and south of Interstate 70. A stronger storm or two with heavy
rain and some hail is possible over the far eastern plains where
more moisture and instability exists.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Patchy fog and low clouds will be possible early Tuesday morning
following a cold front. Thunderstorms will increase in coverage
each day Tuesday through Thursday as more subtropical moisture
pushes into the area. Thursday could see locally heavy rainfall
from some of the storms. Friday through Sunday will be drier but
isolated late day storms are still possible, especially over the
higher terrain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$

Gimmestad/RJK

Hazardous Weather Outlook
National Weather Service North Platte NE
1144 AM CDT Mon Aug 21 2017

NEZ004>010-022>029-035>038-056>059-069>071-094-221645-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
1144 AM CDT Mon Aug 21 2017 /1044 AM MDT Mon Aug 21 2017/

This Hazardous Weather Outlook is for portions of western and
north central Nebraska.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A cool front will move across western Nebraska through this
evening that will be the focus for a few severe thunderstorms.
The area of concern is to the east of a line from Valentine to
Ogallala. The main threat will be large hail and damaging winds.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

Thursday through Saturday thunderstorms appear possible across
portions of the outlook area, mainly in the afternoon and
evening.However, the risk for severe thunderstorms is low at this
time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed through this evening.

&&
Get your latest weather, hydrological, and climate information
at http://www.weather.gov/northplatte

$$

Keck

Hazardous Weather Outlook
National Weather Service Goodland KS
1041 AM MDT Mon Aug 21 2017

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-221645-
Yuma County-Kit Carson County-Cheyenne County-Cheyenne-Rawlins-
Decatur-Norton-Sherman-Thomas-Sheridan-Graham-Wallace-Logan-Gove-
Greeley-Wichita-Dundy-Hitchcock-Red Willow-
1041 AM MDT Mon Aug 21 2017 /1141 AM CDT Mon Aug 21 2017/

This hazardous weather outlook is for east central Colorado...
extreme southwest Nebraska and northwest Kansas.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

A few strong to severe thunderstorms are possible during the mid to
late afternoon hours across the region as a cold front moves into the
central High Plains region. Small hail and gusty winds exceeding 40
mph will be the primary threats.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY...

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

$$

Hazardous Weather Outlook
National Weather Service Cheyenne WY
815 AM MDT Mon Aug 21 2017

NEZ002-003-019>021-054-055-095-096-221415-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-
815 AM MDT Mon Aug 21 2017

This hazardous weather outlook is for portions of western
Nebraska.

.DAY ONE...TODAY AND TONIGHT

Areas of fog, locally dense along the North Platte Valley, will
linger until later this morning. Visibilties will range from as
low as a half mile along the North Platte Valley to five miles.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Chances of thunderstorms will return to the region by the middle
of the week.  Severe storms are not expected.

.Spotter information statement...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Hastings NE
630 AM CDT Mon Aug 21 2017

KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-
221200-
Phillips-Smith-Jewell-Rooks-Osborne-Mitchell-Valley-Greeley-Nance-
Sherman-Howard-Merrick-Polk-Dawson-Buffalo-Hall-Hamilton-York-
Gosper-Phelps-Kearney-Adams-Clay-Fillmore-Furnas-Harlan-Franklin-
Webster-Nuckolls-Thayer-
630 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for south central Nebraska and
portions of north central Kansas.

.DAY ONE...Today and Tonight.

Patchy dense fog is possible through 9 am along the Platte River
in Dawson and western Buffalo Counties and also along the North
Loup River near Ord with visibility at one quarter mile or less at
times.

Chances of thunderstorms begin to increase by late afternoon and
into the evening. There is a marginal chance of severe
thunderstorms primarily between 6 pm and 11 pm. The primary
potential threats include 60 mph wind gusts and quarter size
hail.
Localized flooding is also possible, especially east of Highway
281.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There are at least slight chances for thunderstorms for parts of
the
outlook area late Thursday night through Sunday. At this time, it
appears that the best chances for thunderstorms will be Friday
and
Saturday nights.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening, mainly between
6 pm
and 11 pm. Please pass along any severe weather reports to the
National Weather Service.

&&

More information may be obtained at the following web page:
   https://www.weather.gov/hastings

$$

Heinlein/Mangels

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
529 AM CDT Mon Aug 21 2017

MNZ071-072-080-081-097-098-SDZ040-050-054>056-058>066-068-069-
221030-
Lincoln MN-Lyon MN-Murray-Cottonwood-Pipestone-Rock-Brookings-
Gregory-Miner-Lake-Moody-Aurora-Davison-Hanson-McCook-Minnehaha-
Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton-
529 AM CDT Mon Aug 21 2017

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

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected to develop across the area
during the early to mid afternoon, moving out of the area by early
evening. Severe storms are possible, with hail to golf ball size
and winds to 65 mph the primary threat.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be possible between 1 pm and 7 pm.

$$

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
416 AM CDT Mon Aug 21 2017

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-212330-
Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont-
Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison-
Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler-
Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline-
Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson-
416 AM CDT Mon Aug 21 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST
NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...TODAY AND TONIGHT

River flooding will continue today along the Big Blue River and
Lincoln Creek, mainly in Butler, Seward and Saline counties. River
and stream levels will likely rise today across portions of
western Iowa in response to heavy rainfall overnight.

Thunderstorm chances will increase later this afternoon into
tonight along and ahead of a cold front moving through the area. A
few severe storms appear possible with a risk for damaging winds,
large hail and flooding rainfall.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Some flooding remains possible along the Big Blue River into
Tuesday.

Thunderstorm chances return on Friday night and continue
for at least parts of the area through Sunday.

..SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon or evening.

$$

Hazardous Weather Outlook
National Weather Service Rapid City SD
309 AM MDT Mon Aug 21 2017

SDZ002-013-014-031-032-042>044-046-047-049-073-221300-
Perkins-Northern Meade Co Plains-Ziebach-Pennington Co Plains-
Haakon-Oglala Lakota-Jackson-Bennett-Mellette-Todd-Tripp-
Southern Meade Co Plains-
309 AM MDT Mon Aug 21 2017 /409 AM CDT Mon Aug 21 2017/

This Hazardous weather outlook is for portions of south central
South Dakota...and western South Dakota.

.DAY ONE...TODAY AND TONIGHT

Scattered thunderstorms will move across the area today, mainly
this morning. Severe thunderstorms are not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

$$


Short Term Forecast


Short Term Forecast
National Weather Service North Platte NE
1138 AM CDT Mon Aug 21 2017

NEZ006-007-009-010-211745-
Keya Paha-Boyd-Rock-Holt-
Including the cities of Springview, Spencer, Butte, Lynch,
Bassett, Rose, Oneill, and Atkinson
1138 AM CDT Mon Aug 21 2017

.NOW...
...Severe Thunderstorm Watch in Effect Until 7 PM CDT...
Scattered thunderstorms will approach northern Keya Paha and Boyd
counties through 1240 pm CDT. The storms while moving east
southeast at 35 t0 40 mph should clip areas north of Highway 12,
although additional development further south cannot be ruled out.
The primary threats will be large hail and damaging winds with
storms that further intensify while moving southeast.

$$

Keck

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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