Alert archive / South Dakota / Flash Flood Warnings in 2012
Flash Flood Warning 8, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at May 5, 2012, 9:07 PM CDT for Lake County, Miner County, South Dakota. It was in force for 7 hr. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 5, 2012, 9:07 PM CDT (02:07 UTC)
- Expired
- May 6, 2012, 4:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Lake County, SD, Miner County, SD
The radar
The Sioux Falls radar (KFSD), 61 km from the middle of the area, began a volume at 02:10 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 5, 11:45 PM CDT | FLASH FLOOD | 2 Ene Wentworth, SD | WATER RUNNING OVER SEVERAL ROADS. NEARBY NEIGHBOR MEASURED OVER 6 INCHES OF RAIN. |
| May 6, 12:05 AM CDT | FLASH FLOOD | Madison, SD | *** 1 FATAL *** ACCIDENTAL DROWNING ON MEMORIAL CREEK IN MADISON. TIME IS ESTIMATED. DETAILS OF DROWNING ARE STILL UNKNOWN. |
| May 6, 3:30 AM CDT | FLASH FLOOD | Madison, SD | *** 1 FATAL *** ACCIDENTAL DROWNING ON MEMORIAL CREEK IN MADISON. 29 YEAR OLD MAN LAST SEEN TRYING TO WADE ACROSS FLOODED CREEK AT 330 AM CDT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 2.1 hours before the alert went out and 136 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 657 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 201 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
274
WGUS53 KFSD 060207
FFWFSD
SDC079-097-060500-
/O.NEW.KFSD.FF.W.0008.120506T0207Z-120506T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
907 PM CDT SAT MAY 5 2012
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA
SOUTHEASTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA
* UNTIL MIDNIGHT CDT
* AT 901 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
RAINFALL ESTIMATES OF ONE TO TWO AND A HALF INCHES HAS FALLEN
ACROSS SOUTHEAST MINER AND WESTERN LAKE COUNTY...WITH AN ADDITIONAL
INCH OR MORE RAIN POSSIBLE THROUGH 1030 PM.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MADISON...CANOVA...CHESTER...LAKE HERMAN STATE PARK...ORLAND...
WENTWORTH AND WINFRED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
&&
LAT...LON 4416 9689 4386 9691 4385 9763 4397 9756
4406 9742
$$
CHAPMAN3 follow-up statements
792
WGUS73 KFSD 060347
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1047 PM CDT SAT MAY 5 2012
SDC079-097-060500-
/O.CON.KFSD.FF.W.0008.000000T0000Z-120506T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MINER SD-LAKE SD-
1047 PM CDT SAT MAY 5 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR LAKE AND SOUTHEASTERN
MINER COUNTIES UNTIL MIDNIGHT CDT...
AT 1033 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
DOPPLER RADAR ESTIMATED FROM 2 TO 4 INCHES RAINFALL FROM SOUTHEASTERN
MINER COUNTY THROUGH THE CENTRAL PORTIONS OF LAKE COUNTY. ADDITIONAL
TORRENTIAL RAINFALL IS EXPECTED TO MOVE THROUGH AREAS BETWEEN RAMONA
AND MADISON THROUGH 1130 PM...WITH AN INCH OR MORE ADDITIONAL
RAINFALL EXPECTED.
SLOW MOVING THUNDERSTORMS ARE PRODUCING VERY HEAVY RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH
FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING
INCLUDE...MADISON...CANOVA...CHESTER...LAKE HERMAN STATE PARK...
ORLAND...WENTWORTH AND WINFRED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 4416 9689 4386 9691 4385 9763 4397 9756
4406 9742
$$
CHAPMAN317
WGUS53 KFSD 060437
FFWFSD
SDC079-097-060900-
/O.EXT.KFSD.FF.W.0008.000000T0000Z-120506T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1137 PM CDT SAT MAY 5 2012
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA
SOUTHEASTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA
* UNTIL 400 AM CDT
* AT 1130 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MADISON...CANOVA...CHESTER...LAKE HERMAN STATE PARK...ORLAND...
WENTWORTH AND WINFRED. EMERGENCY MANAGEMENT REPORTED THAT MEMORIAL
CREEK IN EASTERN PORTIONS OF MADISON WAS COMING OUT OF ITS BANKS...
AND ADDITIONAL RUNOFF FROM UPSTREAM NEAR RAMONA IS EXPECTED TO
CAUSE THE CREEK TO SPILL OVER ITS BANKS THROUGH THE ENTIRE LENGTH
THROUGH TOWN. ALSO...LAKE COUNTY EMERGENCY MANAGEMENT HAS ISSUED
A TRAVEL ADVISORY FOR ALL SECONDARY ROADS IN THE COUNTY...AS WATER
WAS FLOWING OVER MANY GRAVEL ROADS...AND DAMAGE TO THESE ROADS
IS EXPECTED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
&&
LAT...LON 4416 9689 4386 9691 4385 9763 4397 9756
4406 9742
$$
CHAPMAN405
WGUS73 KFSD 060853
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
353 AM CDT SUN MAY 6 2012
SDC079-097-060906-
/O.EXP.KFSD.FF.W.0008.000000T0000Z-120506T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MINER SD-LAKE SD-
353 AM CDT SUN MAY 6 2012
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR LAKE AND
SOUTHEASTERN MINER COUNTIES WILL BE ALLOWED TO EXPIRE AT 400 AM
CDT...
THE THREAT OF HEAVY RAIN AND FLASH FLOODING HAS ENDED ACROSS THE
AREA. THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 4 AM CDT.
HOWEVER...FLOODING IN LOW LYING AREAS AND NEAR RIVERS AND STREAMS IS
STILL POSSIBLE. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN
REPLACED WITH A FLOOD WARNING WHICH IS IN EFFECT UNTIL 4 PM CDT THIS
AFTERNOON.
LAT...LON 4416 9689 4386 9691 4385 9763 4397 9756
4406 9742
$$
CJThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:05 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, McCook, Miner | 25 min |
| May 5, 7:29 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Lake, McCook, Miner, Sanborn | 46 min |
| May 5, 7:30 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury, Miner, Sanborn | 45 min |
| May 5, 7:37 PM CDT | Flash Flood Warning | FSD | Davison, Hanson, Miner, Sanborn | 7 hr |
| May 5, 7:41 PM CDT | Severe Thunderstorm Warning | FSD | Beadle, Kingsbury | 36 min |
| May 5, 7:59 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 46 min |
| May 5, 8:11 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Lake, McCook, Miner, Minnehaha and 1 more | 49 min |
| May 5, 8:16 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury | 29 min |
| May 5, 8:42 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury | 48 min |
| May 5, 8:46 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix | 44 min |
| May 5, 8:57 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Hanson, Lake, McCook, Miner, Minnehaha and 1 more | 48 min |
| May 5, 9:05 PM CDT | Severe Thunderstorm Warning | FSD | Beadle, Kingsbury, Miner, Sanborn | 25 min |
| May 5, 9:26 PM CDT | Severe Thunderstorm Warning | FSD | Kingsbury, Miner, Sanborn | 23 min |
| May 5, 9:27 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule | 28 min |
| May 5, 9:29 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 46 min |
| May 5, 9:42 PM CDT | Severe Thunderstorm Warning | FSD | Lake, McCook, Minnehaha, Moody | 48 min |
| May 5, 10:02 PM CDT | Severe Thunderstorm Warning | FSD | Kingsbury, Miner, Sanborn | 28 min |
| May 5, 10:07 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 38 min |
| May 5, 10:15 PM CDT | Flash Flood Warning | FSD | Moody | 4 hr |
| May 5, 10:28 PM CDT | Severe Thunderstorm Warning | FSD | Lake, Minnehaha, Moody | 62 min |
| May 5, 10:31 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Lake, Miner | 29 min |
| May 5, 10:57 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Lake | 33 min |
| May 5, 11:08 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, Lake, McCook, Miner | 37 min |
| May 5, 11:25 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Lake, Moody | 65 min |
| May 5, 11:45 PM CDT | Severe Thunderstorm Warning | FSD | Lake, McCook, Miner, Minnehaha | 45 min |
| May 6, 12:22 AM CDT | Severe Thunderstorm Warning | FSD | Lake, McCook, Minnehaha, Moody | 38 min |
| May 6, 1:08 AM CDT | Areal Flood Warning | FSD | Brookings, Hanson, Kingsbury, Lake, McCook, Miner and 2 more | 33 hr |
| May 6, 4:08 AM CDT | River Flood Warning | FSD | Moody | 23 hr |
| May 6, 4:45 AM CDT | River Flood Warning | FSD | Brookings, Moody | 29 hr |
| May 6, 4:45 AM CDT | River Flood Warning | FSD | Minnehaha, Moody | 3 days |
| May 6, 4:45 AM CDT | River Flood Warning | FSD | Minnehaha | 4 days |
| May 6, 4:45 AM CDT | River Flood Warning | FSD | Lincoln, Minnehaha | 4 days |
| May 6, 4:45 AM CDT | River Flood Warning | FSD | Lincoln, Union | 7 days |
| May 6, 4:45 AM CDT | River Flood Warning | FSD | Union | 7 days |
| May 6, 8:24 AM CDT | River Flood Warning | FSD | McCook | 4 days |
| May 6, 10:31 AM CDT | River Flood Warning | FSD | Davison, Hanson | 7 days |
| May 6, 10:31 AM CDT | River Flood Warning | FSD | Hutchinson, Yankton | 5 days |
| May 6, 10:31 AM CDT | River Flood Warning | FSD | Yankton | 44 hr |
| May 6, 10:31 AM CDT | River Flood Warning | FSD | Turner | 71 hr |
| May 6, 10:31 AM CDT | River Flood Warning | FSD | Turner | 5 days |
| May 6, 10:31 AM CDT | River Flood Warning | FSD | Clay | 7 days |
| May 6, 6:58 PM CDT | River Flood Warning | FSD | Minnehaha | 3 days |
Nearby
Flash Flood Warnings in South Dakota, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.