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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
$$

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

MNC033-063-101-105-117-133-220000-
/O.NEW.KWNS.SV.A.0460.170821T1635Z-170822T0000Z/

MN
.    MINNESOTA COUNTIES INCLUDED ARE

COTTONWOOD           JACKSON             MURRAY
NOBLES               PIPESTONE           ROCK
$$

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

IAC021-035-041-059-093-119-133-141-143-149-167-193-220000-
/O.NEW.KWNS.SV.A.0460.170821T1635Z-170822T0000Z/

IA
.    IOWA COUNTIES INCLUDED ARE

BUENA VISTA          CHEROKEE            CLAY
DICKINSON            IDA                 LYON
MONONA               O`BRIEN             OSCEOLA
PLYMOUTH             SIOUX               WOODBURY
$$

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

SDC009-027-061-067-079-083-087-097-099-101-125-127-135-220000-
/O.NEW.KWNS.SV.A.0460.170821T1635Z-170822T0000Z/

SD
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

BON HOMME            CLAY                HANSON
HUTCHINSON           LAKE                LINCOLN
MCCOOK               MINER               MINNEHAHA
MOODY                TURNER              UNION
YANKTON
$$


ATTN...WFO...FSD...OAX...LBF...


Special Weather Statement


Special Weather Statement
National Weather Service Des Moines IA
1123 AM CDT MON AUG 21 2017

IAZ005-015-023-024-035-211715-
Humboldt IA-Palo Alto IA-Kossuth IA-Webster IA-Pocahontas IA-
1123 AM CDT MON AUG 21 2017

...Thunderstorms with Hail over Northwest Iowa...

At 1121 AM CDT, local law enforcement in Pocahontas County reported
a strong thunderstorm with dime sized hail 7 miles northeast of
Pocahontas, moving northeast at 40 mph. Other storms were also
farther west of Pocahontas moving toward Havelock.

Up to nickel size hail will be possible with these storms.

Locations impacted include...
Algona, Pocahontas, Dakota City, Humboldt, Laurens, West Bend, Fonda,
Rolfe, Gilmore City, Wesley, Livermore, Corwith, Bode, Mallard, Lu
Verne, Renwick, Thor, Palmer, Havelock and Rutland.

LAT...LON 4314 9397 4264 9397 4256 9491 4292 9492
TIME...MOT...LOC 1621Z 243DEG 36KT 4279 9454

$$

Small


Hazardous Weather Outlook


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

IAZ001>003-012>014-020>022-031-032-MNZ089-090-NEZ013-014-SDZ067-
070-071-221030-
Lyon IA-Osceola-Dickinson-Sioux-O`Brien-Clay IA-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Nobles-Jackson-Dixon-Dakota-Lincoln SD-
Clay SD-Union-
529 AM CDT Mon Aug 21 2017

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

.DAY ONE...Today and Tonight
After early day thunderstorms with areas of diminish, additional
storms are likely to develop and spread into the area during the
mid to late afternoon. Storms could produce hail up to 2 inches in
diameter and winds up to 70 mph. An isolated tornado is also
possible. Heavy rain and flash flooding will also be a concern
later afternoon into early evening, especially for areas of
northwest Iowa south of Highway 3 which received heavy rainfall on
Sunday night.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely between 3 pm and 9 pm.

$$

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 La Crosse WI
500 AM CDT Mon Aug 21 2017

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-221100-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-
Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
500 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.

.DAY ONE...Today and Tonight

Scattered storms will move through the area this morning. The main
threat with these storms will be lightning. The stronger storms
may produce small hail and locally heavy rain.

Another round of storms will move through the area from mid
afternoon through early overnight. A few of these storms may
become severe between 3 PM and 10 PM. While the entire area will
have the potential of seeing severe weather, the greatest threat
will be south of Interstate 90. The main severe weather threat
will be damaging winds with a lesser threat for large hail and
isolated tornadoes. In addition to this, there will be periods of
heavy rain.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There will be a chance of storms from Friday night into Sunday. It
is too early discern whether any of these storms will become
severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation could be needed from mid afternoon into the
evening.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

$$

Boyne

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
430 AM CDT Mon Aug 21 2017

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-220930-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
430 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...TODAY AND TONIGHT

A complex of thunderstorms moving into the outlook area early this
morning will produce locally heavy rainfall, frequent lightning
and wind gusts up to 40 mph. Rainfall amounts of 1 inch or more
in less than an hour may cause some localized flooding.

Isolated thunderstorms are possible through the rest of the day.
Some of these storms could produce hail over 1 inch in diameter,
wind gusts over 60 mph and heavy rainfall.

Tonight, widespread thunderstorms are expected as a cold front
moves through the area. These storms may produce damaging winds
up to 70 mph and heavy rainfall. The Storm Prediction Center has
placed a slight risk for severe storms over most of the outlook
area for today and tonight.

Heavy rainfall tonight may lead to totals as high as 3 inches in a
few locations overnight, which could lead to flash flooding.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon through evening.

$$

Sheets

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 Des Moines IA
403 AM CDT Mon Aug 21 2017

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-220915-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
403 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Periods of thunderstorms will occur today and tonight. There is a
marginal risk for hail and strong wind with the storms this
morning, along with heavy rainfall that could lead to localized
flooding.

There is a slight risk for severe storms late this afternoon and
tonight. All modes of severe weather is possible along with heavy
rainfall which could lead to localized flooding. Very large hail
is possible across much of central Iowa especially north of
Interstate 80 and west of Interstate 35. Damaging wind and a few
tornadoes are possible across all of central Iowa.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and evening.

$$

FAB

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
359 AM CDT Mon Aug 21 2017

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
220900-
Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns-
Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-
Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota-
Redwood-Brown-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-
Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk-
St. Croix-Pierce-Dunn-Pepin-Eau Claire-
359 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of central and
southern Minnesota...and west central Wisconsin.

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected today into this evening across
central and south central Minnesota and west central Wisconsin.
A few of these storms could produce severe weather, primarily
over southern Minnesota. Damaging winds, large hail and heavy
rainfall are the primary threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Thunderstorms are expected periodically from Friday night through
Sunday. Although predictability regarding timing and location is
low at this time, severe weather appears possible over the
weekend.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will may be needed over southern
Minnesota today into this evening.

$$

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
315 AM CDT Mon Aug 21 2017

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-220815-
Atchison KS-Miami-Linn KS-Doniphan-Leavenworth-Wyandotte-Johnson KS-
Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-Schuyler-
Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-Clinton-
Caldwell-Livingston-Linn MO-Macon-Platte-Clay-Ray-Carroll-Chariton-
Randolph-Jackson-Lafayette-Saline-Howard-Cass-Johnson MO-Pettis-
Cooper-Bates-Henry-
315 AM CDT Mon Aug 21 2017

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Today and Tonight

 Multiple rounds of thunderstorms are possible this afternoon and
 this evening, some which could become strong to severe. Strong
 winds, hail and perhaps even an isolated tornado are possible with
 the afternoon round especially along and north of Highway 36, and
 strong winds are possible with the late evening-overnight round
 throughout the outlook area.

 In addition to the severe threat, flooding will be a concern this
 evening and tonight throughout the outlook area. Several inches of
 rain are possible, and may fall very rapidly in stronger storms.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

 No hazardous weather is expected at this time.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

$$

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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