Alert archive / Minnesota / Flash Flood Warnings in 2004
Flash Flood Warning 23, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jul 31, 2004, 7:23 PM CDT for Nobles County, Minnesota. It was in force for 3 hr. 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
- Jul 31, 2004, 7:23 PM CDT (00:23 UTC)
- Expired
- Jul 31, 2004, 10:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Nobles County, MN
The radar
The Sioux Falls radar (KFSD), 73 km from the middle of the area, began a volume at 00:26 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 |
|---|---|---|---|
| Jul 31, 7:46 PM CDT | FLASH FLOOD | 1 S Adrian, MN | HEAVY RAIN AND RUNNING WATER OVER THE DIRT ROAD JUST SOUTH OF ADRIAN. |
| Jul 31, 7:50 PM CDT | FLASH FLOOD | 2 Se Rushmore, MN | IN ADDITION TO DANGEROUSLY WASHED OUT DIRT ROADS AND VERY HEAVY RAIN, PEA SIZED HAIL FELL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.4 hours before the alert went out and 218 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
- 465 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1194 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 395 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KFSD 010025 FFWFSD MNC105-010330- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 723 PM CDT SAT JUL 31 2004 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... NOBLES COUNTY IN SOUTHWEST MINNESOTA * UNTIL 1030 PM CDT * AT 721 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES NORTH OF LISMORE TO ADRIAN...MOVING SOUTHEAST AT 10 MPH. ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE WARNED AREA...ESPECIALLY IN WESTERN AND SOUTHERN NOBLES COUNTY WHERE HEAVY THUNDERSTORMS WILL TRACK OVER THE SAME AREA. 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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. LAT...LON 4385 9606 4350 9605 4350 9549 4384 9550 $$ RSR
2 follow-up statements
000 WGUS73 KFSD 010145 FFSFSD MNC105-010330- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 844 PM CDT SAT JUL 31 2004 ...A FLASH FLOOD WARNING CONTINUES UNTIL 1030 PM CDT FOR NOBLES COUNTY... AT 835 PM CDT...TRAINED WEATHER SPOTTERS REPORTED THUNDERSTORMS PRODUCING FLASH FLOODING. THE BACK EDGE OF THESE STORMS WAS LOCATED ALONG A LINE EXTENDING FROM ELLSWORTH TO RUSHMORE...MOVING SOUTHEAST AT 15 MPH. THE CURRENT THUNDERSTORM ACTIVITY SHOULD EXIT SOUTHERN NOBLES COUNTY BY 915 PM...HOWEVER ADDITIONAL DEVELOPMENT IS STILL POSSIBLE. IT WILL ALSO TAKE SOME TIME FOR EXISTING FLOODING TO SUBSIDE...THEREFORE THE FLASH FLOOD WARNING WILL REMAIN IN EFFECT. BETWEEN 745 PM CDT AND 8 PM CDT...TRAINED SPOTTERS REPORTED FLOODING ON DIRT ROADS 1 MILE SOUTH OF ADRIAN...AS WELL AS 2 MILES SOUTHEAST OF RUSHMORE. THE HEAVY RAIN WAS WASHING OUT PARTS OF DIRT ROADS SOUTHEAST OF RUSHMORE...AND DRIVING WAS VERY DANGEROUS. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. LAT...LON 4385 9606 4350 9605 4350 9549 4384 9550 $$ JH
000 WGUS73 KFSD 010333 FFSFSD MNC105-010350- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1033 PM CDT SAT JUL 31 2004 ...A FLASH FLOOD WARNING FOR NOBLES COUNTY HAS EXPIRED... AS OF 1030 PM CDT...THERE HAVE BEEN NO FURTHER REPORTS OF FLOODING ACROSS NOBLES COUNTY...AND ADDITIONAL STORMS NORTH OF SLAYTON ARE CURRENTLY EXPECTED TO REMAIN NORTH OF THE COUNTY. THEREFORE THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 4385 9606 4350 9605 4350 9549 4384 9550 $$ JH
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 7:20 PM CDT | Tornado Warning | FSD | Nobles | 25 min |
| Jul 31, 7:45 PM CDT | Tornado Warning | FSD | Nobles | 30 min |
| Jul 31, 8:17 PM CDT | Severe Thunderstorm Warning | FSD | Nobles | 28 min |
| Jul 31, 10:07 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 38 min |
| Jul 31, 10:45 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Murray | 45 min |
Nearby
Flash Flood Warnings in Minnesota, 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.