Alert archive / Minnesota / Flash Flood Warnings in 2004

Flash Flood Warning 8, NWS Twin Cities, MN

August 23, 2004Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Aug 23, 2004, 9:46 PM CDT for Yellow Medicine County, Minnesota. It was in force for 6 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, 9:46 PM CDT (02:46 UTC)
Expired
Aug 24, 2004, 3:45 AM CDT
In force
6 hr
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 143 km from the middle of the area, began a volume at 02:49 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.8 hours before the alert went out and 179 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 2004-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 210 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 2004-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 square meters per square second.193958Sfc1 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
210 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
578 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
190 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KMPX 240255
FFWMPX
MNC173-240845-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
946 PM CDT MON AUG 23 2004

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  YELLOW MEDICINE COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 345 AM CDT

* THUNDERSTORMS ARE EXPECTED TO CONTINUE TO REDEVELOP AND PASS OVER  
  THE WARNED AREA LATE THIS EVENING...RESULTING IN EXCESSIVE         
  RAINFALL. ESTIMATES FROM RADAR INDICATED THAT 3 TO 5 INCHES OF     
  RAIN HAS FALLEN SINCE 7 PM THIS EVENING OVER THE WARNING AREA.     
  TOTAL ACCUMULATIONS BY 1 AM ARE FORECAST TO REACH 5 TO 8 INCHES    
  AT SOME LOCATIONS. 

* SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...CANBY...CLARKFIELD...
  HANLEY FALLS...HAZEL RUN...ST LEO AND PORTER.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE 
INTO AREAS WHERE THE WATER COVERS THE ROAD. TWO FEET OF RUSHING WATER
CAN CARRY AWAY MOST VEHICLES INCLUDING SPORT UTILITY VEHICLES AND 
PICKUPS.

LAT...LON 4479 9642 4466 9641 4465 9558 4456 9555
      4457 9539 4469 9541 4491 9570 4480 9582

$$
1 follow-up statement
000 
WGUS73 KMPX 240421
FFSMPX
MNC173-240845-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1115 PM CDT MON AUG 23 2004

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM CDT FOR
YELLOW MEDICINE COUNTY...

AT 1115 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATES THAT THE 
AREA OF THUNDERSTORMS WITH THE HEAVIEST RAINFALL RATES HAS PUSHED 
INTO EXTREME SOUTHERN AND SOUTHEASTERN SECTIONS OF YELLOW MEDICINE 
COUNTY.  THROUGH 11 PM CDT...7 INCHES OF RAIN HAS FALLEN IN PORTER 
MINNESOTA WHILE FLOODING IS REPORTED BY COUNTY LAW ENFORCEMENT 
ACROSS HIGHWAY 67 IN CLARKFIELD.  IN ADDITION...THE CANBY HOSPITAL 
HAS REPORTED FLOODING EARLIER THIS MONDAY EVENING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO FORGE
FLOODED ROADWAYS BY FOOT OR AUTOMOBILE. IF YOUR VEHICLE STALLS...
ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE
INTO AREAS WHERE THE WATER COVERS THE ROAD. TWO FEET OF RUSHING WATER
CAN CARRY AWAY MOST VEHICLES INCLUDING SPORT UTILITY VEHICLES AND
PICKUPS. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 4479 9642 4466 9641 4465 9558 4456 9555
      4457 9539 4469 9541 4491 9570 4480 9582

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 23, 7:00 PM CDTSevere Thunderstorm WarningMPXYellow Medicine30 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.