Alert archive / Minnesota / Flash Flood Warnings in 2010

Flash Flood Warning 8, NWS Twin Cities, MN

June 26, 2010Hennepin County, Ramsey County, Washington County, Minnesota; Pierce County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Jun 26, 2010, 10:57 PM CDT for Hennepin County, Ramsey County, Washington County, Minnesota; Pierce County, Wisconsin. It was in force for 3 hr. 3 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: Jun 26, 2010, 10:57 PM CDT (03:57 UTC)
Expired: Jun 27, 2010, 1:29 AM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Hennepin County, MN, Ramsey County, MN, Washington County, MN, Pierce County, WI

The radar

The Minneapolis radar (KMPX), 55 km from the middle of the area, began a volume at 04:00 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
Jun 26, 11:00 PM CDT	FLASH FLOOD	Ellsworth, WI	FLOODED ROADS
Jun 26, 11:10 PM CDT	FLASH FLOOD	1 Nw Maiden Rock, WI	MUD SLIDES NEAR COUNTRY AND 385 ST.
Jun 26, 11:30 PM CDT	FLASH FLOOD	Bloomington, MN	NICOLLET RD SOUTH OF AMERICAN BLVD CLOSED

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, 4.0 hours before the alert went out and 58 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: 1959 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

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

148 
WGUS53 KMPX 270357
FFWMPX
MNC053-123-163-WIC093-270730-
/O.NEW.KMPX.FF.W.0008.100627T0357Z-100627T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1057 PM CDT SAT JUN 26 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PIERCE COUNTY IN WEST CENTRAL WISCONSIN...
  SOUTHEASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 230 AM CDT

* AT 1056 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RAINFALL RATES ARE RNAGING 1 TO 2 INCHES AN HOUR. 
  THESE EXCESSIVE RAINFALL RATES WILL CAUSE RAPID RUNOFF. 
 
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ELLSWORTH...MINNEAPOLIS...RIVER FALLS...BELDENVILLE...
  BLOOMINGTON...COTTAGE GROVE...EDINA...ESDAILE...FALCON HEIGHTS...
  LAKE ELMO...LANDFALL...LAUDERDALE...LITTLE CANADA...MAHTOMEDI...
  MAIDEN ROCK...MAPLEWOOD...MARTEL...NEWPORT...NORTH ST PAUL...
  OAKDALE...PRESCOTT...RICHFIELD...ROSEVILLE...SPRING VALLEY...ST
  LOUIS PARK...STILLWATER...VADNAIS HEIGHTS...WILLERNIE AND WOODBURY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING 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 CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4454 9230 4470 9273 4474 9280 4480 9299
      4493 9301 4496 9310 4482 9326 4480 9337
      4492 9342 4506 9319 4507 9280 4486 9276
      4485 9214

$$
DWE

1 follow-up statement

448 
WGUS73 KMPX 270629
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
129 AM CDT SUN JUN 27 2010

MNC053-123-163-WIC093-270644-
/O.CAN.KMPX.FF.W.0008.000000T0000Z-100627T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON MN-HENNEPIN MN-RAMSEY MN-PIERCE WI-
129 AM CDT SUN JUN 27 2010

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR PIERCE...SOUTHERN
RAMSEY...SOUTHEASTERN HENNEPIN AND SOUTHERN WASHINGTON COUNTIES IS
CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO 
RECEDE...ENDING THE FLOOD THREAT. 

LAT...LON 4454 9230 4470 9273 4474 9280 4480 9299
      4493 9301 4496 9310 4482 9326 4480 9337
      4492 9342 4506 9319 4507 9280 4486 9276
      4485 9214

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 7:39 PM CDT	Special Weather Statement	MPX	Brown, Nicollet, Watonwan	51 min
Jun 26, 7:59 PM CDT	Special Weather Statement	MPX	Carver, Hennepin, Scott	61 min
Jun 26, 8:03 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Le Sueur, Nicollet, Sibley, Watonwan	57 min
Jun 26, 8:15 PM CDT	Flash Flood Warning	MPX	Blue Earth, Faribault, Martin, Watonwan	4 hr
Jun 26, 8:17 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Martin, Watonwan	43 min
Jun 26, 8:22 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Scott, Sibley	53 min
Jun 26, 8:45 PM CDT	Tornado Warning	MPX	Blue Earth, Nicollet	30 min
Jun 26, 8:50 PM CDT	Flash Flood Warning	MPX	Dakota, Freeborn, Le Sueur, Rice, Scott, Steele and 1 more	5 hr
Jun 26, 8:51 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Le Sueur, Rice, Scott	84 min
Jun 26, 9:00 PM CDT	Areal Flood Advisory	MPX	Carver	5 hr
Jun 26, 9:00 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Freeborn, Martin, Steele, Waseca	60 min
Jun 26, 9:11 PM CDT	Tornado Warning	MPX	Le Sueur, Rice, Scott	34 min
Jun 26, 9:35 PM CDT	Tornado Warning	MPX	Steele, Waseca	25 min
Jun 26, 9:42 PM CDT	Tornado Warning	MPX	Dakota, Scott	48 min
Jun 26, 9:45 PM CDT	Flash Flood Warning	MPX	Goodhue	4 hr
Jun 26, 9:47 PM CDT	Tornado Warning	MPX	Faribault, Freeborn, Steele, Waseca	28 min
Jun 26, 9:53 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Washington	82 min
Jun 26, 9:56 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn, Steele, Waseca	49 min
Jun 26, 10:14 PM CDT	Areal Flood Advisory	MPX	Washington	4 hr
Jun 26, 10:40 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	61 min
Jun 27, 12:31 AM CDT	Special Weather Statement	MPX	Dakota, Goodhue, Ramsey, Washington	59 min
Jun 27, 10:42 AM CDT	River Flood Warning	MPX	Blue Earth, Brown, Nicollet	4 days
Jun 27, 10:42 AM CDT	River Flood Warning	MPX	Blue Earth, Brown, Nicollet	9 days
Jun 27, 10:42 AM CDT	River Flood Warning	MPX	Le Sueur, Scott, Sibley	8 days
Jun 27, 10:42 AM CDT	River Flood Warning	MPX	Carver, Scott	11 days
Jun 27, 10:42 AM CDT	River Flood Warning	MPX	Carver, Hennepin, Scott	11 days
Jun 27, 10:42 AM CDT	River Flood Warning	MPX	Dakota, Hennepin, Scott	3 days
Jun 27, 10:42 AM CDT	River Flood Warning	MPX	Redwood	49 hr
Jun 26, 11:14 PM CDT	Flash Flood Warning	MPX	Chippewa, Dunn, Eau Claire, Pepin, Saint Croix	3 hr

Nearby

Flash Flood Warnings in Minnesota, 2010 Flash Flood Warnings in Wisconsin, 2010 Every flash flood warning in 2010

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.