Hazardous Weather Outlook
Issued by NWS Sioux Falls, SD

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FLUS43 KFSD 211113
HWOFSD

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
613 AM CDT Fri Jul 21 2017

IAZ001-002-012>014-020>022-031-032-MNZ098-NEZ013-014-SDZ038-039-
052>062-065>067-069>071-221115-
Lyon IA-Osceola-Sioux-O`Brien-Clay IA-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Rock-Dixon-Dakota-Beadle-Kingsbury-
Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-
McCook-Minnehaha-Hutchinson-Turner-Lincoln SD-Yankton-Clay SD-
Union-
613 AM CDT Fri Jul 21 2017

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

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected early this morning. An
isolated thunderstorm may produce hail up to quarter size and
winds gusts up to 45 mph, especially toward the highway 14
corridor. Spotty downpours could produce one to two inches of
rainfall in a short time.

After storms clear the area later this morning, increasing
sunshine along with oppressive humidity will lead to dangerous
afternoon heat index readings from 100 to 108 degrees.

Additional thunderstorm will be possible by late Friday afternoon
into early Friday evening. If storms do form between 5 pm and 9
pm, they could develop rapidly and quickly become severe with
large hail and damaging wind, especially from northeast Nebraska
and far southeast South Dakota into northwest Iowa. Hail up to
half dollar size and wind gusts to 70 mph would be the primary
threat.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

No hazardous weather is expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible, mainly between 5 pm and 10 pm.

$$

IAZ003-MNZ071-072-080-081-089-090-097-SDZ040-221115-
Dickinson-Lincoln MN-Lyon MN-Murray-Cottonwood-Nobles-Jackson-
Pipestone-Brookings-
613 AM CDT Fri Jul 21 2017

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

.DAY ONE...Today and Tonight

Scattered thunderstorm will persist through early this morning,
with isolated stronger storms capable of quarter size hail. The
risk of widespread severe storms is low. Spotty heavy rainfall is
possible with up to an inch an hour rainfall rates. High humidity
and very warm temperatures by this afternoon will allow heat
index values to approach 95 to 102 degrees.

There will be the threat for additional storms to develop or move
into the area very late afternoon through early evening. The
highest threat with storms will be for damaging wind gusts to 80
mph. An isolated tornado is possible, and a few storms may contain
hail up to golf ball size.


.DAYS TWO THROUGH SEVEN...Saturday through Thursday

No hazardous weather is expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible early this morning, and again from
5 pm to 10 pm tonight.

$$

SDZ050-063-064-068-221115-
Gregory-Charles Mix-Douglas-Bon Homme-
613 AM CDT Fri Jul 21 2017

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

.DAY ONE...Today and Tonight

An isolated thunderstorm early this morning could produce hail up
to half dollar size and winds to 50 mph. Spotty heavy rainfall up
to one to two inches will be possible through mid morning.

After storms clear the area by mid morning, trends for increasing
sunshine along with oppressive humidity will lead to dangerous
afternoon heat index readings from 100 to 108 degrees.

Additional thunderstorm will be possible by late Friday afternoon
into very early Friday evening. If storms do form between 4 pm
and 8 pm, they could develop rapidly and quickly become severe
with large hail and damaging wind Hail up to half dollar size and
wind gusts to 70 mph would be the primary threat.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

No hazardous weather is expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible early this morning, and again 4 pm
to 8 pm.

$$



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