Thunderstorms with heavy rain produced flooding over portions of southeastern Weston County.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS UNR wrote it up.
Thunderstorms with heavy rain produced flooding over portions of southeastern Weston County.
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 3, 4:19 PM MST, 56 minutes earlier.
Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
519 PM MDT Wed Jul 3 2019
.DISCUSSION...(This Evening Through Wednesday)
Issued at 115 PM MDT Wed Jul 3 2019
Latest analysis has an upper low over the Pacific Northwest with a
trough digging down the West Coast with weak upper ridging over the
Mississippi Valley region, leaving the western High Plains in a west
southwesterly flow pattern. At the surface, a stationary
boundary/cold front remains draped across southwestern South Dakota
and northwest SD, into eastern North Dakota. Latest satellite trends
shows a CU field over the southern Black Hills, far southwestern SD,
and areas of eastern Perkins and Meade Counties while low clouds
remain in place over the WY Black Hills, northern Black Hills and
southwestern Butte County remain socked in with fog and low clouds.
For this afternoon and tonight, lee cyclogenesis is ongoing along
the lee trough in eastern Wyoming with large-scale forcing ahead of
an approaching shortwave toward the northwestern portion of the
forecast area. Some convective initiation seems imminent across the
current CU fields in eastern WY and western SD, even with the better
flow aloft over the northern half of the forecast area. Should see
storms move off the higher terrain into the forecast area later this
afternoon/early evening as well. With the frontal boundary, steep
lapse rates, MU CAPE of 1500-3000 J/kg, and modest shear, expect
severe storms this afternoon and evening. Primary threat will be
large hail and damaging winds, and transitioning to more of a wind
event later this evening. The bulk of the storms will push east
overnight, but could see more storm activity redeveloping during the
early morning hours.
On Independence Day, could see some morning storms, then clearing
before the next round of storms in the afternoon and evening. Severe
weather will again be possible as strong CAPE and possibly stronger
shear than today is expected.
Overall, this pattern looks to persistent into early next week,
resulting in daily chances of thunderstorms. Some of the storms
during this time will be strong to severe.
&&
.AVIATION...(For the 00Z TAFS Through 00Z Thursday Evening)
Issued At 517 PM MDT Wed Jul 3 2019
Strong to severe storms will continue to move east through the
region this evening, with IFR and localized LIFR conditions in
stronger storms. Storms may linger through the night. Behind the
storms, low clouds and patchy fog could develop, especially across
northeastern WY and in/around the Black Hills.
&&
.HYDROLOGY...
Issued at 115 PM MDT Wed Jul 3 2019
No changes to the current flash flood watch. PWs are 175% of
average and soils are saturated, especially across northwestern
SD. Expect some heavy rain possibly across southern SD and areas
just east of the Hills. However, with the better forcing further
north, have opted to leave the watch as is and monitor for
possible warnings later this afternoon and evening.
&&
.UNR WATCHES/WARNINGS/ADVISORIES...
SD...Flash Flood Watch through late tonight for SDZ001-002-012>014-
024-025-072-073.
WY...Flash Flood Watch through late tonight for WYZ054-056-057-071.
&&
DISCUSSION...MLS
AVIATION...Johnson
HYDROLOGY...MLSHazardous Weather Outlook...CORRECTED National Weather Service Rapid City SD 257 PM MDT Wed Jul 3 2019 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-041300- 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- 257 PM MDT Wed Jul 3 2019 /357 PM CDT Wed Jul 3 2019/ This Hazardous Weather Outlook is for western South Dakota and northeastern Wyoming. .DAY ONE...This Afternoon and Tonight Scattered strong to severe thunderstorms are possible this afternoon and evening. Large hail, damaging wind gusts, and heavy rain are the main severe weather threats, although a couple tornadoes are also possible. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There is a chance of showers and thunderstorms each day. Severe thunderstorms are possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible today. && Stay tuned to NOAA weather radio for further updates...or check our web site at weather.gov/rapidcity
Special Weather Statement National Weather Service Rapid City SD 549 PM MDT Wed Jul 3 2019 SDZ031-032-043-040030- Jackson SD-Pennington Co Plains SD-Haakon SD- 549 PM MDT Wed Jul 3 2019 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HAAKON... NORTHWESTERN JACKSON AND EAST CENTRAL PENNINGTON COUNTIES UNTIL 630 PM MDT... At 548 PM MDT, Doppler radar was tracking a strong thunderstorm 3 miles east of Delta 9 Missile Silo, or 22 miles west of Philip, moving east at 20 mph. Nickel size hail and wind gusts of 50 to 55 mph will be possible with this storm. Locations impacted include... Quinn, Cottonwood, Delta 1 Launch Facility and Delta 9 Missile Silo. This includes Interstate 90 in South Dakota between Mile Markers 113 and 128. A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for southwestern and west central South Dakota. LAT...LON 4387 10224 4397 10225 4414 10182 4386 10170 TIME...MOT...LOC 2348Z 258DEG 16KT 4394 10210 Pojorlie
Special Weather Statement National Weather Service Rapid City SD 553 PM MDT Wed Jul 3 2019 SDZ042-040045- Oglala Lakota SD- 553 PM MDT Wed Jul 3 2019 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL OGLALA LAKOTA COUNTY UNTIL 645 PM MDT... At 553 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from 7 miles west of Manderson to 9 miles southwest of White Clay. Movement was northeast at 25 mph. Penny size hail and wind gusts of 50 to 55 mph will be possible with these storms. Locations impacted include... Pine Ridge, Manderson and Sharps Corner. A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for southwestern South Dakota. LAT...LON 4329 10271 4344 10236 4300 10241 4300 10277 TIME...MOT...LOC 2353Z 214DEG 20KT 4328 10262 4289 10270 Pojorlie
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
600 PM MDT WED JUL 03 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0437 PM TORNADO 5 WSW ALLEN 43.24N 102.01W
07/03/2019 BENNETT SD TRAINED SPOTTER
TORNADO LASTED LESS THAN 1 MINUTE. LOCATION ESTIMATED
FROM RADAR AND SPOTTER REPORT.
&&
MLSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
602 PM MDT WED JUL 03 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0602 PM HEAVY RAIN 6 ENE MARTIN 43.20N 101.62W
07/03/2019 M0.86 INCH BENNETT SD TRAINED SPOTTER
&&
MEPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
606 PM MDT WED JUL 03 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0450 PM TSTM WND DMG ALLEN 43.28N 101.92W
07/03/2019 BENNETT SD EMERGENCY MNGR
SINGLE WIDE MOBILE HOME BLOWN OFF ITS FOUNDATION.
&&
XXPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
609 PM MDT WED JUL 03 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM HAIL PRINGLE 43.61N 103.59W
07/03/2019 E1.50 INCH CUSTER SD TRAINED SPOTTER
&&
METhe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Dewey Road was inundated with water in several locations. A culvert on Dewey Road near Hay Creek was washed out.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2019Every state in 2019This day in weather historyWarnings in Wyoming, July 2019
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 2026-09-24. Each event’s entry at NCEI: 854741.