Alert archive / Minnesota / Flash Flood Warnings in 2005

Flash Flood Warning 52, NWS Sioux Falls, SD

September 25, 2005Cottonwood County, Minnesota

NWS Sioux Falls, SD issued this flash flood warning at Sep 25, 2005, 12:04 AM CDT for Cottonwood County, Minnesota. It was in force for 4 hr. 1 report 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 25, 2005, 12:04 AM CDT (05:04 UTC)
Expired
Sep 25, 2005, 4:00 AM CDT
In force
4 hr
Issued by
NWS Sioux Falls, SD
Area
Counties, with a storm outline in the text

County Cottonwood County, MN

The radar

The Sioux Falls radar (KFSD), 134 km from the middle of the area, began a volume at 05:04 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

TimeReportWhereRemark
Sep 25, 12:20 AM CDTFLASH FLOODWindom, MNPERKINS CREEK IS OUT OF ITS BANKS AND IS CONTINUING TO RISE. NUMEROUS INTERSECTIONS ARE UNDERWATER. INTERSECTION OF HIGHWAY 60 AND 71 HAS THREE FEET OF STANDING WATER WITH CARS STALLED OUT. WIDESPREAD BASEMENT FLOODING AND GARAGES ARE FLOODED OUT.

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, 5.1 hours before the alert went out and 154 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2005-09-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2005-09-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -33 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
638 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-33 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KFSD 250506
FFWFSD
MNC033-250900-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1204 AM CDT SUN SEP 25 2005

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COTTONWOOD COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 400 AM CDT

* AT 1202 AM CDT...LAW ENFORCEMENT IN WINDOM REPORTED WIDESPREAD 
FLOODING IN WINDOM.

ADDITIONAL THUNDERSTORMS ARE EXPECTED OVER THE WARNED AREA CREATING 
THE POTENTIAL FOR ADDITIONAL FLOODING. 

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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 4418 9545 4384 9548 4385 9489 4410 9485
      4410 9509 4418 9512

$$
BT
2 follow-up statements
000 
WGUS73 KFSD 250536
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1231 AM CDT SUN SEP 25 2005

MNC033-250900-
COTTONWOOD MN-
1231 AM CDT SUN SEP 25 2005

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM CDT FOR
COTTONWOOD COUNTY...

AT 1220 AM CDT...FIRE AND RESCUE REPORTED WIDESPREAD FLOODING IN 
WINDOM.  PERKINS CREEK IS OUT OF ITS BANKS AND IS CONTINUING TO 
RISE. NUMEROUS INTERSECTIONS IN TOWN ARE UNDERWATER...STALLING OUT 
CARS. SEVERAL BASEMENTS HAVE BEEN REPORTED FLOODED...AND GARAGES 
HAVE BEEN FLOODED OUT. 

ADDITIONAL RAINS ARE EXPECTED OVER THE WARNED AREA CREATING 
ADDITIONAL FLOODING. 

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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 4418 9545 4384 9548 4385 9489 4410 9485
      4410 9509 4418 9512

$$
BT
000 
WGUS73 KFSD 250851
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
351 AM CDT SUN SEP 25 2005

MNC033-250901-
COTTONWOOD MN-
351 AM CDT SUN SEP 25 2005

...THE FLASH FLOOD WARNING FOR COTTONWOOD COUNTY IS CANCELLED...

THE THREAT FOR HEAVY RAINS HAS DIMISHED...AND WIDESPREAD FLASH 
FLOODING IS NO EXPECTED. HOWEVER...FLOODING ALONG RIVERS AND STREAMS 
IS STILL POSSIBLE THIS MORNING AS OVER NIGHT RAINS RUN OFF INTO THE 
RIVERS AND STREAMS.

LAT...LON 4418 9545 4384 9548 4385 9489 4410 9485
      4410 9509 4418 9512

$$

CJ

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 24, 8:32 PM CDTSevere Thunderstorm WarningFSDNobles28 min
Sep 24, 9:17 PM CDTFlash Flood WarningFSDCottonwood, Jackson3 hr
Sep 24, 11:53 PM CDTFlash Flood WarningFSDNobles4 hr
Sep 25, 1:14 AM CDTFlash Flood WarningFSDJackson4 hr

Nearby

Flash Flood Warnings in Minnesota, 2005Every flash flood warning in 2005

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.