Alert archive / Wisconsin / Flash Flood Warnings in 2012

Flash Flood Warning 9, NWS Twin Cities, MN

June 14, 2012Goodhue County, Minnesota; Pepin County, Pierce County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Jun 14, 2012, 7:29 PM CDT for Goodhue County, Minnesota; Pepin County, Pierce County, Wisconsin. 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
Jun 14, 2012, 7:29 PM CDT (00:29 UTC)
Expired
Jun 15, 2012, 12:00 AM CDT
In force
5 hr
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Flood severity
None

Counties Goodhue County, MN, Pepin County, WI, Pierce County, WI

The radar

The La Crosse radar (KARX), 111 km from the middle of the area, began a volume at 00:33 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, 0.5 hours before the alert went out and 115 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 2012-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1087 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 2012-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 307 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
1087 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
751 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
307 m²/s²
0-3 km storm-relative helicity
337 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

416 
WGUS53 KMPX 150029
FFWMPX
MNC049-WIC091-093-150500-
/O.NEW.KMPX.FF.W.0009.120615T0029Z-120615T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
729 PM CDT THU JUN 14 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTHEASTERN PIERCE COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHEASTERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  SOUTHERN PEPIN COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL MIDNIGHT CDT

* AT 725 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. STORM TOTALS OF THREE TO SIX INCHES RAIN ARE
  POSSIBLE.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ELLA...FRONTENAC...MAIDEN ROCK...PEPIN...PORCUPINE...STOCKHOLM...
  LUND AND AREAS SOUTHWEST OF DURAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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

&&

LAT...LON 4443 9221 4445 9225 4445 9240 4448 9239
      4451 9240 4457 9253 4459 9202 4453 9204
      4452 9203 4441 9208

$$

TDK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 14, 7:56 PM CDTSevere Thunderstorm WarningMPXFaribault, Martin34 min
Jun 14, 8:25 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Freeborn, Waseca35 min
Jun 14, 9:26 PM CDTAreal Flood AdvisoryMPXGoodhue, Rice, Steele3 hr
Jun 14, 9:34 PM CDTRiver Flood WarningMPXGoodhue7 hr
Jun 14, 10:00 PM CDTFlash Flood WarningMPXDakota, Goodhue, Rice4 hr
Jun 14, 10:22 PM CDTSpecial Weather StatementMPXFaribault, Freeborn53 min
Jun 14, 11:11 PM CDTSpecial Weather StatementMPXFreeborn64 min
Jun 14, 11:52 PM CDTAreal Flood WarningMPXGoodhue6 hr
Jun 15, 1:21 AM CDTAreal Flood AdvisoryMPXFaribault, Freeborn, Steele, Waseca4 hr
Jun 15, 1:38 AM CDTAreal Flood WarningMPXDakota, Goodhue, Rice, Steele4 hr
Jun 15, 5:51 AM CDTAreal Flood WarningMPXDakota, Goodhue, Rice4 hr
Jun 15, 9:31 AM CDTAreal Flood WarningMPXDakota, Goodhue, Rice8 hr

Nearby

Flash Flood Warnings in Wisconsin, 2012Flash Flood Warnings in Minnesota, 2012Every flash flood warning in 2012

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.