Alert archive / Minnesota / Flash Flood Warnings in 2005

Flash Flood Warning 47, NWS Twin Cities, MN

October 4, 20059 counties in Minnesota

NWS Twin Cities, MN issued this flash flood warning at Oct 4, 2005, 7:26 PM CDT for 9 counties in Minnesota. It was in force for 5 hr. 4 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: Oct 4, 2005, 7:26 PM CDT (00:26 UTC)
Expired: Oct 5, 2005, 12:30 AM CDT
In force: 5 hr
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Anoka County, MN, Carver County, MN, Dakota County, MN, Hennepin County, MN, McLeod County, MN, Ramsey County, MN, Scott County, MN, Sibley County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 11 km from the middle of the area, began a volume at 00:30 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
Oct 4, 7:40 PM CDT	FLASH FLOOD	Eden Prairie, MN	CARS STRANDED BY FLOOD WATERS NEAR THE INTERSECTION OF HIGHWAY 5 AND MITCHELL ROAD.
Oct 4, 7:52 PM CDT	FLASH FLOOD	St Paul, MN	1 FOOT OF WATER CROSSING ROADWAYS ON THE WEST SIDE OF TOWN.
Oct 4, 8:15 PM CDT	FLASH FLOOD	Chaska, MN	SEVERAL STREETS FLOODED IN TOWN. THE DEEPEST WATER WAS WAIST DEEP.
Oct 4, 10:22 PM CDT	FLOOD	Apple Valley, MN	STORM SPOTTER REPORTS KNEE DEEP WATER OVER THE ROAD NEAR INTERSECTION OF COUNTY ROAD 42 AND PENNOCK AVE. TRAFFIC HAS GROUND TO A STANDSTILL.

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 12 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: 938 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 528 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 264 m²/s²
0-3 km storm-relative helicity: 429 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 13.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KMPX 050031
FFWMPX
MNC003-019-037-053-085-123-139-143-163-050530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
726 PM CDT TUE OCT 4 2005

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ANOKA COUNTY IN EAST CENTRAL MINNESOTA
  WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA
  CARVER COUNTY IN EAST CENTRAL MINNESOTA
  DAKOTA COUNTY IN EAST CENTRAL MINNESOTA
  SCOTT COUNTY IN EAST CENTRAL MINNESOTA
  MCLEOD COUNTY IN CENTRAL MINNESOTA
  SIBLEY COUNTY IN CENTRAL MINNESOTA

* UNTIL 1230 AM CDT

* AT 726 PM CDT...RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY
  RAIN ACROSS MUCH OF THE WARNED AREA. THE STORMS PRODUCING THE      
  HEAVIEST RAIN WERE OVER THE EAST AND SOUTH SECTIONS OF THE TWIN    
  CITIES. ESTIMATES FROM RADAR INDICATED THAT 1 TO 2 INCHES OF  RAIN 
  HAS FALLEN DURING THE PAST HOUR OVER THE WARNED AREA. THESE        
  STORMS WERE MOVING EAST AT 20 MPH.

  EXPECT ADDITIONAL THUNDERSTORMS TO REDEVELOP AND PASS OVER THE
  WARNED AREA... RESULTING IN EXCESSIVE RAINFALL.

* SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...MINNEAPOLIS...ST     
  PAUL...ANOKA...APPLE VALLEY...ARLINGTON...BELLE                    
  PLAINE...WACONIA...HUTCHINSON...AND HUGO.

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 4450 9442 4459 9341 4481 9283 4504 9286
      4519 9286 4536 9309 4533 9339 4513 9358
      4503 9372 4489 9414

$$
JPR

2 follow-up statements

000 
WGUS73 KMPX 050120
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
811 PM CDT TUE OCT 4 2005

MNC003-019-037-053-085-123-139-143-163-050530-
ANOKA MN-WASHINGTON MN-HENNEPIN MN-RAMSEY MN-MCLEOD MN-CARVER MN-
DAKOTA MN-SCOTT MN-SIBLEY MN-
811 PM CDT TUE OCT 4 2005

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT FOR
SIBLEY...SCOTT...DAKOTA...CARVER...MCLEOD...RAMSEY...HENNEPIN...
WASHINGTON AND ANOKA COUNTIES...

AT 811 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED THUNDERSTORMS
PRODUCING VERY HEAVY RAIN OVER THE EASTERN SECTIONS OF THE TWIN 
CITIES. MORE THUNDERSTORMS CONTINUE TO DEVELOP OVER SOUTHWEST AND 
SOUTH CENTRAL MINNESOTA...AND MOVE INTO EAST CENTRAL MINNESOTA.

ESTIMATES FROM RADAR INDICATED THAT AS MUCH AS 2 INCHES OF RAIN HAS 
FALLEN DURING THE PAST HOUR OVER THE WARNED AREA. THE STORMS 
PRODUCING THE VERY HEAVY RAINFALL WERE MOVING NORTHEAST AT 25 MPH.

AT 740 PM...VEHICLES WERE REPORTED STRANDED DUE TO FLOODING IN EDEN 
PRAIRIE...AT THE INTERSECTION OF HIGHWAY 5 AND MITCHELL ROAD.

AT 815 PM...WAIST DEEP WATER WAS REPORTED OVER ROADS IN CHASKA. 

EXPECT ADDITIONAL THUNDERSTORMS TO REDEVELOP AND PASS OVER THE WARNED
AREA... RESULTING IN EXCESSIVE RAINFALL.

SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...BLAINE...BLOOMINGTON...
BROOKLYN PARK...BURNSVILLE...COON RAPIDS...EAGAN AND EAST BETHEL.

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 4450 9442 4459 9341 4481 9283 4504 9286
      4519 9286 4536 9309 4533 9339 4513 9358
      4503 9372 4489 9414

$$

JPR

000 
WGUS73 KMPX 050241
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
930 PM CDT TUE OCT 4 2005

MNC003-019-037-053-085-123-139-143-163-050530-
ANOKA MN-WASHINGTON MN-HENNEPIN MN-RAMSEY MN-MCLEOD MN-CARVER MN-
DAKOTA MN-SCOTT MN-SIBLEY MN-
930 PM CDT TUE OCT 4 2005

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT FOR
SIBLEY...SCOTT...DAKOTA...CARVER...MCLEOD...RAMSEY...HENNEPIN...
WASHINGTON AND ANOKA COUNTIES...

AT 930 PM...A STORM SPOTTER REPORTED THAT THE MINNEHAHA CREEK FROM 
LAKE HARRIET TO LAKE NOKOMIS...IN MINNEAPOLIS...WAS OVERFLOWING 
SIGNIFICANTLY. 

AS OF 900 PM...RAINFALL TOTALS OF 3 TO 4 INCHES OF RAIN HAVE BEEN 
REPORTED IN PARTS OF MINNETONKA AND EDEN PRAIRIE. 

RADAR DETECTED ANOTHER BAND OF THUNDERSTORMS WITH TORRENTIAL 
RAIN...MOVING THROUGH THE SOUTH AND WEST SUBURBS OF THE TWIN CITIES. 
ESTIMATES FROM RADAR INDICATED THAT RAINFALL RATES OF 1 TO AS MUCH 
AS 2 INCHES AN HOUR WERE OCCURRING.

RAINFALL TOTALS OF 6 TO 8 INCHES MAY OCCUR BEFORE THIS FLOOD EVENT 
IS OVER.  

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 4450 9442 4459 9341 4481 9283 4504 9286
      4519 9286 4536 9309 4533 9339 4513 9358
      4503 9372 4489 9414

$$
JPR

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 4, 8:18 PM CDT	Flash Flood Warning	MPX	Blue Earth, Brown, Le Sueur, Martin, Nicollet, Redwood and 2 more	4 hr

Nearby

Flash Flood Warnings in Minnesota, 2005 Every 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.