Alert archive / South Dakota / Flash Flood Warnings in 2004
Flash Flood Warning 8, NWS Aberdeen, SD
NWS Aberdeen, SD issued this flash flood warning at Aug 23, 2004, 8:27 PM CDT for Deuel County, South Dakota. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 23, 2004, 8:27 PM CDT (01:27 UTC)
- Expired
- Aug 23, 2004, 11:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Aberdeen, SD
- Area
- Counties, with a storm outline in the text
County Deuel County, SD
The radar
The Sioux Falls radar (KFSD), 127 km from the middle of the area, began a volume at 01:27 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.5 hours before the alert went out and 141 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
- 1648 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 802 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 254 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 9.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KABR 240128 FFWABR SDC039-240430- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ABERDEEN SD 827 PM CDT MON AUG 23 2004 THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A * FLASH FLOOD WARNING FOR... DEUEL COUNTY IN NORTHEAST SOUTH DAKOTA * UNTIL 1130 PM CDT * AT 827 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAINFALL WAS OCCURRING OVER THE WARNED AREA. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. NEARLY HALF OF ALL FLOOD FATALITIES ARE VEHICLE RELATED. THIS EXTENDS THE FLASH FLOOD WARNING THAT WAS SET TO EXPIRE AT 830 PM CDT. THUNDERSTORMS PRODUCING VERY HEAVY RAIN ARE LOCATED ACROSS SOUTHERN DEUEL COUNTY. RADAR ESTIMATES AT BETWEEN 4 TO 6 INCHES HAS FALLEN SO FAR...WITH MORE HEAVY RAIN ON THE WAY. REPORTS FROM CLEAR LAKE INDICATE THAT LOCAL CREEKS AND STREAMS ARE RUNNING BANKFULL. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS OR FLASH FLOODS. IF FLASH FLOODING OCCURS...ACT QUICKLY...MOVE TO HIGHER GROUND. LAT...LON 4483 9648 4457 9648 4457 9685 4483 9684 $$ HINTZ
2 follow-up statements
000 WGUS73 KABR 240301 CCA FFSABR SDC039-240430- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 955 PM CDT MON AUG 23 2004 ...THE FLASH FLOOD WARNING WARNING FOR DEUEL COUNTY REMAINS IN EFFECT UNTIL 1130 PM CDT... AT 955 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THUNDERSTORMS ARE STILL PRODUCING VERY HEAVY RAIN ACROSS FAR SOUTHEASTERN DEUEL COUNTY. EARLIER...REPORTS OF SEVEN TO SEVEN AND ONE HALF INCHES OF RAIN FELL 2 TO 3 MILES SOUTH OF LAKE COCHRANE WITH HEAVY RAIN STILL FALLING. DOPPLER RADAR INDICATES THAT IN EXCESS OF 10 INCHES OF RAIN HAS FALLEN IN AN AREA FROM LAKE COCHRANE TO BRANDT TO ASTORIA. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. NEARLY HALF OF ALL FLOOD FATALITIES ARE VEHICLE RELATED. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS OR FLASH FLOODS. IF FLASH FLOODING OCCURS...ACT QUICKLY...MOVE TO HIGHER GROUND. $$ HINTZ
000 WGUS73 KABR 240425 FFSABR SDC039-240445- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 1124 PM CDT MON AUG 23 2004 ...THE FLASH FLOOD WARNING FOR DEUEL COUNTY WILL BE ALLOWED TO EXPIRE AT 1130 PM CDT... AT 1124 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE THUNDERSTORMS THAT PRODUCED THE FLOODING HAVE ENDED...AND FLOODING WAS NO LONGER OCCURRING. HOWEVER...STANDING WATER MAY STILL POSE A TRAVEL PROBLEM THROUGH THE EARLY MORNING HOURS...ESPECIALLY ACROSS SOUTHEASTERN DEUEL COUNTY. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. NEARLY HALF OF ALL FLOOD FATALITIES ARE VEHICLE RELATED. $$ HINTZ
What forecasters said that day
The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Aug 23, 3:00 PM CDT, 5 hours 27 minutes earlier.
Area forecast discussion, Aug 23, 3:00 PM CDT, 5 hours 27 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ABERDEEN SD 3 PM CDT MON AUG 23 2004 .SHORT TERM...TONITE THROUGH THURSDAY NITE MAIN ISSUE THROUGH FORECAST PERIOD WILL BE CHANCE OF CONVECTION. FOR TNT DECENT SYSTEM OVER INTERMOUNTAIN WEST WILL BE LIFTING INTO SC CANADA...SPREADING UPPER LEVEL DIFFLUENCE AND LIFT ACROSS ABR CWA. MOISTURE CONTINUING TO SPREAD NORTH THIS AFTERNOON. WITH DEWPOINTS CLIMBING ABOVE 60 FOR MOST AREAS BY EARLY EVENING. SCATTERED ACTIVITY ACROSS EAST THIS EVENING WILL LIKELY BE REPLACED WITH MORE LINEAR STORMS LATE THIS EVENING AS AM EXPECTING MAIN ACTIVITY TO DEVELOP OUT WEST AND SPREAD ACROSS CWA OVERNIGHT. TUESDAY INTO TUESDAY EVE SHOULD BRING A RELATIVE LULL IN THE ACTIVITY AS EFFECTIVE MOISTURE AND LL BOUNDARIES PUSH OFF EAST AND SOUTH AND GRADUALLY DISSIPATE. BUT MODERATE LLJ EXPECTED TO RETURN TO CENTRAL/WESTERN SD LATE TUESDAY NIGHT AND MAY SEE SOME ACTIVITY WITH THAT. EMPHASIS ON WED AND THU SHOULD BE MAINLY OVER EASTERN CWA WHERE BEST MOISTURE WILL RESIDE AND NOCTURNAL LLJ WILL BE STRONGEST. TEMPS MODIFIED A BIT BUT WHEN ALL IS SAID AND DONE...THEY HAVENT BEEN CHANGED TOO MUCH. .LONG TERM...FRIDAY THROUGH MONDAY MEDIUM RANGE MODELS HAVE SIMILAR TREATMENT FOR WEST COAST UPPER TROUGH BUT DIFFER IN TIMING. ECMWF EJECTS THE TROUGH TO THE NORTHEAST INTO SOUTHERN CANADA ABOUT 24 HOURS FASTER THAN EITHER THE GFS OR DGEX. GFS AND DGEX VERY CLOSE THOUGH HAVE PRECIPITATION TIMING VARIES BETWEEN 6 TO 12 HOURS. OVERALL PATTERN SHOWS THE WEST COAST UPPER TROUGH MOVING EAST INTO THE CENTRAL AND NORTHERN PLAINS ACCOMPANIED BY A SURFACE FRONTAL SYSTEM. MODEL QPF INDICATES POTENTIAL FOR A MEASURABLE RAIN EVENT BEGINNING FRIDAY AND PERSISTING INTO EARLY SATURDAY MORNING. THE PRECIPITATION WILL MOVE EAST ACROSS THE CWA WITH THE SURFACE COLD FRONT FRIDAY. EXPECT WRAP AROUND PRECIPITATION TO LINGER INTO EARLY SATURDAY AS THE DEFORMATION SHIELD LIFTS TOWARD CANADA SATURDAY MORNING. FOR NOW KEPT SUNDAY AND MONDAY DRY THROUGH MODEL QPF HINTS THAT SHOWERS MAY RETURN MONDAY. SURFACE TEMPERATURES WILL COOL INTO THE 70S BEHIND THE COLD FRONT. 850 TEMPERATURES CONTINUE PAST TREND OF DIPPING INTO SINGLE DIGITS EARLY IN THE EXTENDED PERIOD BEFORE RECOVERING BETWEEN 10-15C LATE SUNDAY AND MONDAY WITH WEAK WARM AIR ADVECTION UNDER AN UPPER LEVEL SHORTWAVE RIDGE. && WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. && TDK/BM
Hazardous weather outlook, Aug 23, 5:00 AM CDT, 15 hours 27 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ABERDEEN SD 500 AM CDT MON AUG 23 2004 MNZ039-046-SDZ008-020>023-240946- BIG STONE-CODINGTON-DEUEL-GRANT-HAMLIN-ROBERTS-TRAVERSE- 500 AM CDT MON AUG 23 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF CENTRAL...NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA...AS WELL AS BIG STONE AND TRAVERSE COUNTIES IN MINNESOTA. .DAY ONE...TODAY AND TONIGHT STRONG THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND NORTH OF A WARM FRONT THAT WILL PUSH INTO CENTRAL SOUTH DAKOTA THIS AFTERNOON AND PROGRESS EASTWARD INTO MINNESOTA TONIGHT. THERE IS A SLIGHT RISK THAT SOME OF THESE STORM MAY BECOME SEVERE. THE MAIN THREAT OF ANY SEVERE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THUNDERSTORMS ARE EXPECTED TO REDEVELOP AHEAD OF A SURFACE TROUGH TUESDAY AFTERNOON IN EASTERN SOUTH DAKOTA AND WEST CENTRAL MINNESOTA. THERE IS A SLIGHT RISK THAT A FEW OF THESE STORMS WILL BECOME SEVERE. THE MAIN THREAT OF ANY SEVERE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING. SDZ003>007-009>011-015>019-033>037-045-048-051-240946- BROWN-BUFFALO-CAMPBELL-CLARK-CORSON-DAY-DEWEY-EDMUNDS-FAULK-HAND- HUGHES-HYDE-JONES-LYMAN-MARSHALL-MCPHERSON-POTTER-SPINK-STANLEY- SULLY-WALWORTH- 500 AM CDT MON AUG 23 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF CENTRAL...NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA...AS WELL AS BIG STONE AND TRAVERSE COUNTIES IN MINNESOTA. .DAY ONE...TODAY AND TONIGHT STRONG THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND NORTH OF A WARM FRONT THAT WILL PUSH INTO CENTRAL SOUTH DAKOTA THIS AFTERNOON AND PROGRESS EASTWARD INTO MINNESOTA TONIGHT. THERE IS A SLIGHT RISK THAT SOME OF THESE STORM MAY BECOME SEVERE. THE MAIN THREAT OF ANY SEVERE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING. LILES
In the hours before
Local storm report, Aug 23, 2:50 PM CDT, 5 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
250 PM CDT MON AUG 23 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0235 PM HAIL 3 NE PIERPONT 45.53N 97.79W
08/23/2004 0.75 INCH DAY SD PUBLIC
&&
HARDINGLocal storm report, Aug 23, 6:45 PM CDT, 1 hour 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
645 PM CDT MON AUG 23 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0625 PM HAIL 5 NE BRANDT 44.72N 96.55W
08/23/2004 1.00 INCH DEUEL SD PUBLIC
&&
TDKLocal storm report, Aug 23, 7:04 PM CDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
704 PM CDT MON AUG 23 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0700 PM HAIL 3 NW ASTORIA 44.59N 96.59W
08/23/2004 0.75 INCH DEUEL SD LAW ENFORCEMENT
&&
TDKLocal storm report, Aug 23, 7:31 PM CDT, 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
731 PM CDT MON AUG 23 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0705 PM TORNADO 3 NE TORONTO 44.60N 96.60W
08/23/2004 DEUEL SD EMERGENCY MNGR
TORNADO DAMAGED SHED AND GRAIN BIN. DEPUTY SHERIFF ALSO
ESTIMATES THAT 30 FULL SIZE TREES HAVE BEEN UPROOTED.
WINDOWS ON SOUTH SIDE OF GARAGE BLOWN OUT.
&&
TDKThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 7:05 PM CDT | Flash Flood Warning | ABR | Deuel | 85 min |
| Aug 23, 7:48 PM CDT | Severe Thunderstorm Warning | ABR | Deuel | 42 min |
| Aug 23, 8:01 PM CDT | Tornado Warning | ABR | Deuel | 29 min |
| Aug 23, 9:30 PM CDT | Severe Thunderstorm Warning | ABR | Deuel | 30 min |
Nearby
Flash Flood Warnings in South Dakota, 2004Every flash flood warning in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.