Flood, Dewey
- When
- June 5, 2:00 PM MST to June 6, 12:00 PM MST
- Where
- Dewey County, 7.33 mi NNE of Moreau to 4.03 mi NNW of Isabel
- Cause
- Heavy Rain
- Property damage
- $500,000
- Crop damage
- $100,000
- Reported by
- Newspaper
- Coordinates
- 45.460, -100.370
Flood in South Dakota, June 5 to 6, 2008
Very heavy rains of 3 to 7 inches caused extensive flooding throughout Dewey County. Many roads, bridges, dams, culverts, along with some buildings were damaged or destroyed by the flooding.
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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $500,000
- Crop damage
- $100,000
- Events
- 1
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 ABR wrote it up.
Very heavy rains of 3 to 7 inches caused extensive flooding throughout Dewey County. Many roads, bridges, dams, culverts, along with some buildings were damaged or destroyed by the flooding. One man, west of Promise, used a boat to get back and forth from his ranch. A federal disaster declaration was issued for Dewey County and the Cheyenne River Reservation.
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 Aberdeen, SD wrote its last area forecast discussion before the first event at Jun 5, 1:22 PM MST, 38 minutes earlier.
Area forecast discussion, Jun 5, 1:22 PM MST, 38 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ABERDEEN SD
322 PM CDT THU JUN 5 2008
.SHORT TERM...TONIGHT THROUGH 00Z SATURDAY
BIGGEST ISSUE IN THE NEAR TERM IS THE POTENTIAL FOR VERY HEAVY
RAIN AND SEVERE WEATHER THROUGH THE NEXT 9 TO 12 HOURS.
MSAS SHOWS STRONG/DEEP SFC LOW LOCATED IN SC NEB. THERE IS SOME
DIFFERENCES IN THE MOVEMENT OF THIS SFC LOW. 12Z NAM12/GFS SHOW
SFC LOW LIFTING JUST TO THE EAST...WITH RESULT BEING MAJORITY OF
CWA GETTING PLACED IN THE COLD SECTOR. THE LATEST RUC/INTERNET
BASED 20KM WRF SHOW THE SFC LOW INSTEAD LIFTING DUE NORTH...WITH
MUCH OF THE ERN CWA REMAINING IN THE WARM SECTORED. NOT SURE THAT
THE SFC WARM FRONT WILL LIFT NORTHWARD INTO ERN CWA...BUT SEEMS
LIKELY THAT 85H FRONT WILL LIFT NORTHWARD...WITH RESULTANT
ELEVATED CONVECTION A GOOD BET. SEVERE PARAM ON SPC HOMEPAGE SHOWS
THAT MAIN FOCUS FOR SEVERE ACTIVITY WILL BE EAST OF THE JAMES
RIVER VALLEY THIS EVENING/EARLY OVERNIGHT. BASED ON RUC FCSTD
SOUNDINGS FOR KABR/KATY...LOW LEVEL STRATUS AND FREEZING LEVELS
AOA 14K AGL...VERY HEAVY RAIN MORE A THREAT COMPARED TO
HAIL...ALTHOUGH A FEW MARGINALLY SEVERE HAIL STONES NOT OUT OF THE
QUESTION WITH STRONGER UPDRAFTS LATER THIS EVENING. BOTH NAM/RUC
SHOW 85H-7H SPEC HUMIDITES INCREASING TO 10-11 G/KG MOISTURE BY
03Z FRIDAY...WITH AREAS OF STRONGER 85H-7H FRONTOGENESIS LIFTING
NORTHWARD AS WELL. HAVE HOISTED A FLASH FLOOD WATCH FOR THE
COUNTIES INCLUDING AND EAST OF THE JAMES RIVER VALLEY...DUE TO THE
LOCALIZED HEAVY RAIN POTENTIAL THAT EXISTS.
FUTHER WEST...STRONG TROWEL FEATURE ADVERTISED TO SET UP ACROSS MO
RIVER BASIN..ESPECIALLY IN THE KPIR AREA. THIS AREA RECEIVED
LOCALLY HEAVY RAIN A FEW DAYS AGO...WITH EM REPORTING VERY
SATURATED GROUND AND STANDING WATER STILL IN PLACE. 18Z RUC RUN
ACCUMS FOR PCPN SHOW 1-2 INCHES OF RAINFALL FOR FAR SW CWA. GIVEN
7H/85H TROWEL FEATURES...COUPLED WITH NAM SHOWING VERY STRONG NET
ISEN OMEGA INCREASING ACROSS THE SW AT THE 305K LAYER ALONG WITH
8-12G/KG MOISTURE ADVECTION...HAVE UPGRADED FLOOD WATCH TO A FLOOD
WARNING THROUGH FRIDAY MORNING FOR THIS AREA.
TEMPERATURES THROUGH THE NEAR TERM WILL REMAIN BELOW NORMAL WITH
STRATUS SHIELD REMAINING IN PLACE THROUGH THE NIGHT...AND WEAK CAA
TAKING PLACE DURING THE DAY FRIDAY.
.LONG TERM...SATURDAY THROUGH MID WEEK.
MEDIUM RANGE MODELS ARE SHOWING GOOD AGREEMENT THROUGH THE
PERIOD...WITH A GENERALIZED CONTINUATION OF THE CURRENT
PATTERN...DEPICTED BY WEST COAST TROUGH CONTINUING TO EJECT
SHORTWAVES INTO THE UPPER PLAINS. WILL ALSO SEE A PERSISTENT
SOUTHWEST FLOW IN THE UPPER LEVELS BETWEEN SYSTEMS...AND LACK OF
SURFACE FEATURE TO SIGNIFICANTLY DRY US OUT...SO FIND IT
DIFFICULT TO REMOVE THE SLIGHT/CHANCE POPS THAT ARE IN THERE NOW.
WITH RESPECT TO TEMPERATURES...WILL REMAIN SLIGHTLY BELOW CLIMO
DUE TO PERSISTENT SHOWER/THUNDER ACTIVITY.
&&
.AVIATION...
A BREAK IN THE ACTION SO FAR WITH RAIN TO THE NORTH AND WEST...AND
THUNDERSTORMS SOUTH...HOWEVER FORECAST CONDITIONS WILL DETERIORATE
AS THUNDERSTORMS MOVE INTO THE REGION LATER TODAY. WILL CONTINUE TO
SEE MVFR/IFT CIGS THROUGH MUCH OF THE FORECAST PERIOD...WITH
HIGHLY VARIABLE VISBY...MAINLY DUE TO LOW STRATUS/BR AS WELL AS
AROUND THUNDERSTORMS. WINDS SWITCH TO WESTERLY THIS
EVENING/OVERNIGHT...AND DESPITE CIGS REMAINING MVFR/IFR...VISBY
WILL GENERALLY IMPROVE.
&&
.ABR WATCHES/WARNINGS/ADVISORIES...
SD...FLASH FLOOD WATCH THROUGH FRIDAY AFTERNOON FOR BROWN-CLARK-
CODINGTON-DAY-DEUEL-GRANT-HAMLIN-MARSHALL-ROBERTS-SPINK.
MN...FLASH FLOOD WATCH THROUGH FRIDAY AFTERNOON FOR BIG STONE-
TRAVERSE.
&&
SHORT TERM...HINTZ
LONG TERM...CONNELLY
AVIATION...CONNELLY
WEATHER.GOV/ABERDEENHazardous weather outlook, Jun 5, 9:45 AM MST, 4 hours 15 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE ABERDEEN SD 1145 AM CDT THU JUN 5 2008 MNZ039-046-SDZ006>008-011-018>023-061645- TRAVERSE-BIG STONE-BROWN-MARSHALL-ROBERTS-DAY-SPINK-CLARK- CODINGTON-GRANT-HAMLIN-DEUEL- 1145 AM CDT THU JUN 5 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO INCREASE IN AREAL COVERAGE AND INTENSITY THIS AFTERNOON. SOME THUNDERSTORMS MAY BE SEVERE WITH LARGE HAIL...DAMAGING WINDS...AND POSSIBLE TORNADOES. THE BEST POTENTIAL FOR SEVERE STORMS IS EXPECTED ALONG AND EAST OF THE INTERSTATE 29 CORRIDOR. LOCALLY HEAVY RAINFALL IS ALSO LIKELY...AND A FLASH FLOOD WATCH IS IN EFFECT THROUGH FRIDAY AFTERNOON. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS ARE POSSIBLE AGAIN LATE THIS WEEKEND AND THROUGH EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS LIKELY THIS AFTERNOON AND TONIGHT. SDZ033>037-045-048-051-061645- STANLEY-SULLY-HUGHES-HYDE-HAND-JONES-LYMAN-BUFFALO- 1145 AM CDT THU JUN 5 2008 /1045 AM MDT THU JUN 5 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL SOUTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT A FLOOD WARNING IS IN EFFECT THROUGH FRIDAY MORNING. WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED TO RE-DEVELOP AND MOVE INTO CENTRAL SOUTH DAKOTA LATER THIS AFTERNOON AND CONTINUE TONIGHT. LOCALLY HEAVY RAINFALL IS POSSIBLE...WITH RAINFALL TOTALS OF 3 TO 4 INCHES POSSIBLE BY EARLY FRIDAY. THERE IS ALSO A SLIGHT RISK FOR SEVERE THUNDERSTORMS...WITH LARGE HAIL BEING THE MAIN THREAT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS ARE POSSIBLE AGAIN LATE THIS WEEKEND AND THROUGH EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON AND TONIGHT. SDZ003>005-009-010-015>017-061645- CORSON-CAMPBELL-MCPHERSON-WALWORTH-EDMUNDS-DEWEY-POTTER-FAULK- 1145 AM CDT THU JUN 5 2008 /1045 AM MDT THU JUN 5 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL SOUTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT SHOWERS AND ISOLATED THUNDERSTORMS ARE EXPECTED TO CONTINUE THIS AFTERNOON AND TONIGHT. LOCALLY HEAVY RAINFALL IS POSSIBLE...ALONG WITH SMALL HAIL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS ARE POSSIBLE AGAIN LATE THIS WEEKEND AND THROUGH EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. FOWLE
In the hours before
Local storm report, Jun 5, 12:43 PM MST, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
243 PM CDT THU JUN 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 PM HAIL 10 NW IONA 43.65N 99.57W
06/05/2008 E0.75 INCH LYMAN SD TRAINED SPOTTER
PENNY SIZED HAIL ALONG WITH HEAVY RAIN.
&&
FOWLELocal storm report, Jun 5, 1:06 PM MST, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
306 PM CDT THU JUN 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0300 PM HAIL 2 SE RELIANCE 43.86N 99.57W
06/05/2008 E0.88 INCH LYMAN SD PUBLIC
NICKEL SIZED HAIL AND HEAVY RAINFALL.
&&
FOWLEThe radar
The national radar mosaic for the moment the first event began.
Event by event
1 flood. Local standard time, as filed.
What these are
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flood and Hail in Oklahoma, June 5, 2008
- Tornadoes and Flash Flooding in South Dakota, June 5, 2008
- Flooding in Indiana, June 5 to 17, 2008
- Tornadoes and Flash Flooding in Iowa, June 5 to 6, 2008
- Flooding in Iowa, June 5 to 30, 2008
- Flash Flooding and Hail in Kansas, June 5 to 6, 2008
- Tornadoes and Flash Flood in Missouri, June 5 to 8, 2008
- Hail and Damaging Winds in Kansas, June 5, 2008
- Tornadoes and Flooding in Nebraska, June 5 to 12, 2008
- Flooding in South Dakota, June 5 to 7, 2008
- Flash Flood in South Dakota, June 5, 2008
- Tornadoes and Hail in Kansas, June 5, 2008
More
Every storm in South Dakota in 2008Every state in 2008This day in weather historyWarnings in South Dakota, June 2008
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 2026-09-24. Each event’s entry at NCEI: 121024.