Severe Thunderstorm Warning 103, NWS Sioux Falls, SD

976 
WWUS53 KFSD 292042
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
342 PM CDT THU JUN 29 2017

NEC043-051-SDC127-292115-
/O.CON.KFSD.SV.W.0103.000000T0000Z-170629T2115Z/
Dakota NE-Dixon NE-Union SD-
342 PM CDT THU JUN 29 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR NORTHWESTERN DAKOTA...NORTHEASTERN DIXON AND SOUTHWESTERN UNION
COUNTIES...

At 341 PM CDT, a severe thunderstorm was located over Ponca, moving 
east at 20 mph.  A second severe thunderstorm was located 5 miles 
northwest of Jackson also moving east at 20 mph. 

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

This severe storm will be near...
  Jefferson around 405 PM CDT. 
  North Sioux City around 410 PM CDT. 

Other locations impacted by this severe thunderstorm include
Waterbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4241 9680 4260 9690 4271 9662 4270 9662
      4270 9661 4269 9659 4268 9658 4268 9657
      4267 9658 4267 9657 4242 9646
TIME...MOT...LOC 2041Z 251DEG 18KT 4255 9672 

HAIL...1.75IN
WIND...60MPH
 
$$

Schumacher

177 
WWUS53 KFSD 292111
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
411 PM CDT THU JUN 29 2017

NEC043-051-SDC127-292120-
/O.EXP.KFSD.SV.W.0103.000000T0000Z-170629T2115Z/
Dakota NE-Dixon NE-Union SD-
411 PM CDT THU JUN 29 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DAKOTA...
NORTHEASTERN DIXON AND SOUTHWESTERN UNION COUNTIES WILL EXPIRE AT 415
PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire. Dakota and Union 
counties remain in a severe thunderstorm warning.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
northwestern Iowa...northeastern Nebraska...and southeastern South
Dakota.

LAT...LON 4241 9680 4260 9690 4271 9662 4270 9662
      4270 9661 4269 9659 4268 9658 4268 9657
      4267 9658 4267 9657 4242 9646
TIME...MOT...LOC 2110Z 251DEG 18KT 4260 9654 

$$

Weisser

Area Forecast Discussion
National Weather Service Sioux Falls SD
1243 PM CDT Thu Jun 29 2017

.SHORT TERM...(Today and Tonight)
Issued at 225 AM CDT Thu Jun 29 2017

Main wave continues to slide east, while a weaker wave is progged
to move over the area during the day, so expect showers for most
of the day today. Location of the warm front will determine the
northern extent of more significant type of storms/weather. Models
vary greatly with its placement and with the ongoing convection
across Iowa and Nebraska masking its current location. I think
the warm front is currently further south than what the models
depict. All models bring the warm front north during the day, but
right now I'm leaning toward the more southern location
solutions. Storms will still develop along elevated warm front and
hence went with higher pops across southern sections of the CWA,
but feel even higher pops will be to the south of forecast area.
Severe Weather possible today, but the bigger threat will be
south of the area where better shear is forecast to occur per
model soundings.

Storms will be a little slow to exit the area, but expect most of
the activity to be to the east by 12z Friday. Temperatures will be
cooler today than those of yesterday due to influence of the
cooler air behind yesterday's front, but also because of cloud
cover and precip.

.LONG TERM...(Friday through Wednesday)
Issued at 225 AM CDT Thu Jun 29 2017

Northwest flow takes over on Friday, with cold air advection regime
creating elevated instability. Ongoing convection from the overnight
hours will exit to the east in the morning, with a possible lull in
activity late morning into midday. Elevated front moves through in
the afternoon, and will spark additional scattered showers and non-
severe thunderstorms primarily in the afternoon and early evening.
Activity is expected to diminish around sunset. Highs will be a
degree or two cooler than today, in the 70s.

Saturday will be quite pleasant with dry northwest flow aloft and
relatively light surface winds shifting to the south or southwest.
Skies will be mostly clear to partly cloudy with mild temperatures
in the mid 70s to mid 80s.

Sunday will see highs in the 80s areawide. Shower and thunderstorm
chances increase in the afternoon and evening as a shortwave dives
across the region and a warm front potentially sets up near
northwest Iowa and the Missouri Valley. Secondary wave will keep
unsettle weather into Monday, with additional chance for
thunderstorms.

Upper ridge begins to rebound on Tuesday and Wednesday, but models
also begin to diverge quickly heading into Wednesday night and
Thursday. Temperatures will be warmer, with the lower 90s returning
to south central SD.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1236 PM CDT Thu Jun 29 2017

VFR conditions will prevail through the TAF period, but low
ceilings (low to mid clouds) are possible later today. Scattered
showers and thunderstorms are expected this afternoon and evening;
becoming numerous after 00z mostly for KFSD, and KSUX sites. Thunderstorm
chances will slowly diminish from west to east in the overnight
hours. In addition, strong gusty winds to 45 mph are possible with
the storms.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
IA...None.
NE...None.
&&

SHORT TERM...Heitkamp
LONG TERM...Hanko
AVIATION...05

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
420 AM CDT Thu Jun 29 2017

IAZ001>003-MNZ071-072-080-081-089-090-097-098-SDZ038>040-050-
052>068-300930-
Lyon IA-Osceola-Dickinson-Lincoln MN-Lyon MN-Murray-Cottonwood-
Nobles-Jackson-Pipestone-Rock-Beadle-Kingsbury-Brookings-Gregory-
Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-
McCook-Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Lincoln SD-
Bon Homme-
420 AM CDT Thu Jun 29 2017

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

Isolated to scattered showers will spread across the area through
the early afternoon, and persist into tonight. Severe weather is
unlikely.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

IAZ012>014-020>022-031-032-NEZ013-014-SDZ069>071-300930-
Sioux-O'Brien-Clay IA-Plymouth-Cherokee-Buena Vista-Woodbury-Ida-
Dixon-Dakota-Yankton-Clay SD-Union-
420 AM CDT Thu Jun 29 2017

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

.DAY ONE...Today and Tonight

Scattered showers are expected to develop by this afternoon and
persist through tonight. A few severe storms will be possible,
mainly late afternoon through this evening, with hail up to the
size of quarters and wind gusts up to 60 mph.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.