Hail and Damaging Wind in South Dakota, July 30, 2017

Name: Hail and Damaging Wind in South Dakota, July 30, 2017
Start: 2017-07-30T15:28
End: 2017-07-30T15:28
Location: South Dakota

July 30, 2017 · NWS UNR · 2 events in 1 county or zone

A thunderstorm briefly became severe over parts of northern Haakon County, producing small hail and wind gusts to 60 mph.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS UNR wrote it up.

A thunderstorm briefly became severe over parts of northern Haakon County, producing small hail and wind gusts to 60 mph.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Rapid City, SD wrote its last area forecast discussion before the first event at Jul 30, 1:49 PM MST, 1 hour 39 minutes earlier.

Area forecast discussion, Jul 30, 1:49 PM MST, 1 hour 39 minutes before

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Hazardous weather outlook, Jul 30, 3:00 AM MST, 12 hours 28 minutes before

Hazardous Weather Outlook
National Weather Service Rapid City SD
400 AM MDT Sun Jul 30 2017

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-311400-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Black Hills-Northern Foot Hills-Rapid City-
Southern Foot Hills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Pennington Co Plains-Haakon-Fall River-
Oglala Lakota-Jackson-Bennett-Mellette-Todd-Tripp-
Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Hermosa Foot Hills-Northern Campbell-Southern Campbell-
Western Crook-Wyoming Black Hills-Weston-Northeastern Crook-
400 AM MDT Sun Jul 30 2017 /500 AM CDT Sun Jul 30 2017/

This Hazardous weather outlook is for western South Dakota and
Northeastern Wyoming.

.DAY ONE...Today and Tonight

There is a chance of showers and thunderstorms today and tonight.
While isolated strong thunderstorms with hail and gusty winds are
possible, widespread organized severe thunderstorms are not
expected.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There is a chance of showers and thunderstorms each day from
Monday through Wednesday.

.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

In the hours before

Special weather statement, Jul 30, 1:35 PM MST, 1 hour 53 minutes before

Special Weather Statement
National Weather Service Rapid City SD
235 PM MDT SUN JUL 30 2017

SDZ027-041-302100-
Fall River SD-Southern Foot Hills SD-
235 PM MDT SUN JUL 30 2017

...STRONG THUNDERSTORM OVER NORTH CENTRAL FALL RIVER COUNTY...

At 234 PM MDT, Doppler radar was tracking a strong thunderstorm over
Cascade Falls, or near Hot Springs, moving southeast at 15 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Cascade Falls and Angostura Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If on or near Angostura Reservoir, get out of the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
10 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4336 10366 4343 10350 4332 10332 4321 10358
TIME...MOT...LOC 2034Z 320DEG 14KT 4335 10354

JC

Local storm report, Jul 30, 2:00 PM MST, 1 hour 28 minutes before

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Local storm report, Jul 30, 2:20 PM MST, 1 hour 8 minutes before

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Local storm report, Jul 30, 2:27 PM MST, 1 hour 1 minute before

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Special weather statement, Jul 30, 2:35 PM MST, 53 minutes before

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Special weather statement, Jul 30, 2:58 PM MST, 30 minutes before

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The radar

The Rapid City radar (KUDX), 101 km away, was scanning. The volume nearest the first event began at 22:26 UTC.

Open the radar archive at this moment

Event by event

1 hail, 1 thunderstorm wind. Local standard time, as filed.

Hail, Haakon

When: July 30, 3:28 PM MST
Where: Haakon County, 3 mi N of Milesville
Measured: 0.75 in hail
Reported by: Public
Coordinates: 44.493, -101.670

Thunderstorm Wind, Haakon

When: July 30, 3:28 PM MST
Where: Haakon County, 3 mi N of Milesville
Measured: 52 kt (60 mph) estimated gust
Reported by: Public
Coordinates: 44.493, -101.670

Wild gusts were estimated at 60 mph.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in South Dakota in 2017 Every state in 2017 This day in weather history Warnings in South Dakota, July 2017

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 704955, 704956.