Alert archive / Minnesota / Flash Flood Warnings in 2004

Flash Flood Warning 29, NWS Sioux Falls, SD

August 23, 2004Lincoln County, Minnesota

NWS Sioux Falls, SD issued this flash flood warning at Aug 23, 2004, 9:21 PM CDT for Lincoln 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: Aug 23, 2004, 9:21 PM CDT (02:21 UTC)
Expired: Aug 24, 2004, 12:15 AM CDT
In force: 3 hr
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Lincoln County, MN

The radar

The Sioux Falls radar (KFSD), 115 km from the middle of the area, began a volume at 02:24 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
Aug 23, 11:00 PM CDT	FLASH FLOOD	12 Nne Ivanhoe, MN	TOTAL OF 8.75 INCHES OF RAIN FELL. WATER WAS RUNNING OVER DRIVEWAY AND A FEW COUNTY ROADS IN SPOTS.
Aug 23, 11:00 PM CDT	FLASH FLOOD	12 Nne Ivanhoe, MN	TOTAL OF 8.75 INCHES OF RAIN FELL. WATER WAS RUNNING OVER DRIVEWAY AND A FEW COUNTY ROADS IN SPOTS.

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, 2.4 hours before the alert went out and 167 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KFSD 240222
FFWFSD
MNC081-240515-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
921 PM CDT MON AUG 23 2004

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN LINCOLN COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 1215 AM CDT

* AT 915 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
FROM AN AREA OF THUNDERSTORMS PRODUCING HAVY RAINFALL 8 MILES 
NORTHEAST OF HENDRICKS...MOVING NORTHEAST AT 10 MPH.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4464 9652 4448 9646 4451 9608 4464 9610

$$

JRM

1 follow-up statement

000 
WGUS73 KFSD 240429
FFSFSD
MNC081-240515-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1125 PM CDT MON AUG 23 2004

...THE FLASH FLOOD WARNING FOR NORTHERN LINCOLN COUNTY HAS BEEN 
CANCELLED...

THE AREA OF THUNDERSTORMS THAT PRODUCED AREAS OF HEAVY RAINFALL 
ACROSS NORTHERN LINCOLN COUNTY HAD WEAKENED AND SHIFTED TO THE EAST. 
RADAR ESTIMATES INDICATE THAT 2 TO 5 INCHES OF RAIN HAD FALLEN 
ACROSS THE NORTHERN PORTIONS OF THE COUNTY.

IF ANY FLOODING WAS OBSERVED...PLEASE REPORT TO LOCAL LAW 
ENFORCEMENT. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER 
SERVICE IN SIOUX FALLS.


LAT...LON 4464 9652 4448 9646 4451 9608 4464 9610

$$

JRM

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 23, 9:45 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	45 min
Aug 23, 10:31 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	29 min

Nearby

Flash Flood Warnings in Minnesota, 2004 Every 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.