Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 33, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Sep 15, 2004, 7:01 AM CDT for Clay County, Dickinson County, O'Brien County, Iowa. It was in force for 119 min. 2 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
- Sep 15, 2004, 7:01 AM CDT (12:01 UTC)
- Expired
- Sep 15, 2004, 9:00 AM CDT
- In force
- 119 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Clay County, IA, Dickinson County, IA, O'Brien County, IA
The radar
The Sioux Falls radar (KFSD), 112 km from the middle of the area, began a volume at 12:01 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 |
|---|---|---|---|
| Sep 15, 8:10 AM CDT | FLOOD | Royal, IA | SEVERAL HOUSES HAD BASEMENT FLOODING DUE TO HEAVY RAINFALL. |
| Sep 15, 8:15 AM CDT | FLOOD | Spirit Lake, IA | HIGHWAY 9/71 PARTIALLY UNDERWATER IN SPIRIT LAKE. 255TH AVENUE UNDERWATER NEAR FRANCIS SITES SOUTH OF SPIRIT LAKE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 0.0 hours before the alert went out and 220 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
- 1061 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- -71 m²/s²
- 0-3 km storm-relative helicity
- -84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KFSD 151202
FFWFSD
IAC041-059-141-151400-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
701 AM CDT WED SEP 15 2004
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CLAY COUNTY IN NORTHWEST IOWA
DICKINSON COUNTY IN NORTHWEST IOWA
OBRIEN COUNTY IN NORTHWEST IOWA
* UNTIL 900 AM CDT
* AT 635 AM CDT...TRAINED WEATHER SPOTTERS REPORTED FLOODING OF A
FEW ROADWAYS AND OTHER LOW LYING AREAS ACROSS CLAY COUNTY. DOPPLER
RADAR INDICATED THAT 3 TO 6 INCHES OF RAIN FELL OVERNIGHT ACROSS
CLAY...DICKINSON AND OBRIEN COUNTY. ALTHOUGH THE MAJORITY OF RAIN
HAS ENDED...RUNOFF FROM OVERNIGHT RAINS WILL CONTINUE TO CAUSE
FLOODING OF LOW SPOTS AND SOME ROADWAYS.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
LAT...LON 4292 9586 4292 9492 4349 9491 4350 9541
4324 9539 4326 9586
$$
JRM2 follow-up statements
000
WGUS73 KFSD 151334
FFSFSD
IAC041-059-141-151400-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
833 AM CDT WED SEP 15 2004
...A FLASH FLOOD WARNING CONTINUES UNTIL 900 AM CDT FOR CLAY...
OBRIEN AND DICKINSON COUNTIES...
AT 825 AM CDT...RAINFALL HAS ENDED ACROSS THE AREA.
HOWEVER...FLOODING DOES CONTINUE ACROSS THE WARNING AREA AS RUNOFF
FROM HEAVY RAINFALL LAST NIGHT CONTINUES. AT 815 AM CDT...DICKINSON
COUNTY SHERIFF REPORTED THERE WAS WATER ON THE ROADWAY ON HIGHWAY 9
AND 71 IN SPIRIT LAKE. IN ADDITION...WATER WAS OVER 255TH AVENUE
NEAR FRANCIS SITES SOUTH OF SPIRIT LAKE. AT 810 AM CDT...LOCAL
MEDIA ALSO REPORTED THAT BASEMENTS WERE BEING FLOODED NEAR ROYAL.
RADAR ESTIMATES OF 5 TO 8 INCHES WERE REPORTED IN A LARGE PORTION OF
DICKINSON...CLAY AND SOUTHERN OBRIEN COUNTIES. SOME ROADS MAY
STILL HAVE WATER RUNNING OVER THEM...ESPECIALLY IN LOW LYING AREAS.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES.
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF
CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
LAT...LON 4292 9586 4292 9492 4349 9491 4350 9541
4324 9539 4326 9586
$$
SCHUMACHER000
WGUS73 KFSD 151410
FFSFSD
IAC041-059-141-151417-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
907 AM CDT WED SEP 15 2004
...THE FLASH FLOOD WARNING FOR CLAY...OBRIEN AND DICKINSON COUNTIES
WAS ALLOWED TO EXPIRE AT 900 AM CDT...
WATER LEVELS IN STREETS AND FIELDS WERE DROPPING ACROSS THE AREA AS
THE RUNOFF FROM THE HEAVY RAINS OVERNIGHT AND EARLY THIS MORNING
MADE ITS WAY INTO THE RIVERS. PONDING OF WATER IN LOW LYING AREAS IS
STILL POSSIBLE...BUT THE FLOOD THREAT IS SHIFTING TO THE MAIN RIVERS
IN THE REGION. THEREFORE THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO
EXPIRE.
LAT...LON 4292 9586 4292 9492 4349 9491 4350 9541
4324 9539 4326 9586
$$
MGThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 7:12 PM CDT | Flash Flood Warning | FSD | Buena Vista, Cherokee, Clay, Dickinson, O'Brien | 4 hr |
| Sep 15, 3:20 AM CDT | Flash Flood Warning | FSD | Lyon | 3 hr |
| Sep 15, 4:06 AM CDT | Flash Flood Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 114 min |
| Sep 15, 5:26 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 34 min |
Nearby
Flash Flood Warnings in Iowa, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.