Alert archive / Minnesota / Flash Flood Warnings in 2004

Flash Flood Warning 10, NWS Twin Cities, MN

September 14, 2004Steele County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Sep 14, 2004, 8:37 PM CDT for Steele County, Minnesota. It was in force for 5 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: Sep 14, 2004, 8:37 PM CDT (01:37 UTC)
Expired: Sep 15, 2004, 1:30 AM CDT
In force: 5 hr
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Steele County, MN

The radar

The Minneapolis radar (KMPX), 100 km from the middle of the area, began a volume at 01:40 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, 1.6 hours before the alert went out and 101 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: 52 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 758 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 106 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 KMPX 150143
FFWMPX
MNC147-150630-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
837 PM CDT TUE SEP 14 2004

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  STEELE COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 130 AM CDT

* AT 837 PM CDT...RADAR DETECTED THUNDERSTORMS PRODUCING VERY        
  HEAVY RAIN ACROSS MUCH OF THE WARNED AREA.  ESTIMATES FROM RADAR   
  INDICATED THAT NEARLY 3 INCHES OF OF RAIN HAS FALLEN SINCE 6       
  PM OVER THE WARNED AREA. THESE STORMS WERE MOVING NORTHEAST AT     
  30 MPH.          

  EXPECT ADDITIONAL THUNDERSTORMS TO MOVE INTO THE AREA DURING THE   
  THE REST OF THE EVENING...RESULTING IN EXCESSIVE RAINFALL.

* SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE                        
  OWATONNA...BIXBY...AND                                             
  ELLENDALE.                                       

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.

LAT...LON 4387 9338 4387 9309 4412 9308 4413 9337

$$

JPR

1 follow-up statement

000 
WGUS73 KMPX 150244
FFSMPX
MNC147-150630-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
938 PM CDT TUE SEP 14 2004

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 AM CDT FOR
STEELE COUNTY...

AT 938 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SOLID 
AREA OF RAIN...MIXED WITH OCCASIONAL THUNDERSTORMS...PRODUCING VERY 
HEAVY DOWNPOURS. ESTIMATES FROM RADAR INDICATED THAT NEARLY 4 INCHES 
OF RAIN HAS FALLEN SINCE 6 PM OVER THE SOUTHEAST PART OF STEELE 
COUNTY...NEAR BLOOMING PRAIRIE. LAW ENFORCEMENT OFFICIALS REPORT 
STREET AND BASEMENT FLOODING. 

EXPECT ADDITIONAL THUNDERSTORMS TO MOVE OVER THE AREA THROUGH THE 
EARLY MORNING...RESULTING IN MORE FLOODING ON ALREADY SATURATED 
GROUND. 

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

LAT...LON 4387 9338 4387 9309 4412 9308 4413 9337

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 14, 7:28 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele	47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.