Alert archive / Minnesota / Areal Flood Warnings in 2012

Areal Flood Warning 3, NWS Twin Cities, MN

June 15, 20124 counties in Minnesota

NWS Twin Cities, MN issued this areal flood warning at Jun 15, 2012, 1:38 AM CDT for 4 counties in Minnesota. It was in force for 4 hr. 6 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 15, 2012, 1:38 AM CDT (06:38 UTC)
Expired: Jun 15, 2012, 6:00 AM CDT
In force: 4 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Dakota County, MN, Goodhue County, MN, Rice County, MN, Steele County, MN

The radar

The Minneapolis radar (KMPX), 63 km from the middle of the area, began a volume at 06:39 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 15, 5:00 AM CDT	HEAVY RAIN 4.43	Goodhue, MN
Jun 15, 5:27 AM CDT	FLOOD	Cannon Falls, MN	HIGHWAY 20...CANNON FALLS BLVD CLOSED IN TOWN AMD SOME HOME EVACUATIONS DUE TO RISING WATER.
Jun 15, 6:00 AM CDT	HEAVY RAIN 4.54	Kenyon, MN
Jun 15, 6:00 AM CDT	HEAVY RAIN 5.13	4 E Nerstrand, MN	24 HR TOTAL.
Jun 15, 6:00 AM CDT	HEAVY RAIN 5.51	1 Se Northfield, MN	24 HOUR TOTAL.
Jun 15, 6:00 AM CDT	HEAVY RAIN 6.02	3 Ssw Dundas, MN	24 HR TOTAL.

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, 6.6 hours before the alert went out and 64 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: 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.

375 
WGUS43 KMPX 150638
FLWMPX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
138 AM CDT FRI JUN 15 2012

MNC037-049-131-147-151100-
/O.NEW.KMPX.FA.W.0003.120615T0638Z-120615T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAKOTA MN-GOODHUE MN-RICE MN-STEELE MN-
138 AM CDT FRI JUN 15 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLOOD WARNING FOR...
  GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  NORTHEASTERN STEELE COUNTY IN SOUTH CENTRAL MINNESOTA...
  RICE COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 600 AM CDT

* RADAR ESTIMATES THAT WIDESPREAD RAINS OF 4 TO 8 INCHES HAS FALLEN  
  MAINLY DURING THE EVENING HOURS ACROSS MUCH OF THE WARNED AREA.    
  POSSIBLY AS MUCH AS 10 INCHES MAY HAVE FALLEN IN A NARROW BAND    
  FROM NEAR STANTON TO SEVERAL MILES EAST OF CANNON FALLS.  AN       
  OBSERVER 2 MILES SOUTHWEST OF CANNON FALLS REPORTED 8.41 INCHES OF 
  RAIN THROUGH 10 PM. THERE HAVE ALSO BEEN SOME REPORTS OF ROAD      
  CLOSURES DUE TO HIGH WATER. A FEW THUNDERSTORMS ARE STILL POSSIBLE 
  YET TONIGHT...BUT ADDITIONAL WIDESPREAD HEAVY RAINS ARE NOT        
  EXPECTED. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FARIBAULT...
  RED WING...BOMBAY...CANNON FALLS...DENNISON...DUNDAS...GOODHUE...
  HADER...KENYON...LONSDALE...MEDFORD...NERSTRAND...NORTHFIELD...
  RANDOLPH...RUSKIN...STANTON...VESELI...WANAMINGO...WARSAW...
  WASTEDO...WEBSTER AND WELCH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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 4416 9336 4454 9352 4454 9328 4456 9327
      4457 9316 4461 9261 4446 9237 4430 9271
      4413 9319

$$

BAP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 7:29 PM CDT	Flash Flood Warning	MPX	Goodhue	5 hr
Jun 14, 7:56 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Martin	34 min
Jun 14, 8:25 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Freeborn, Waseca	35 min
Jun 14, 9:26 PM CDT	Areal Flood Advisory	MPX	Goodhue, Rice, Steele	3 hr
Jun 14, 9:34 PM CDT	River Flood Warning	MPX	Goodhue	7 hr
Jun 14, 10:00 PM CDT	Flash Flood Warning	MPX	Dakota, Goodhue, Rice	4 hr
Jun 14, 10:22 PM CDT	Special Weather Statement	MPX	Faribault, Freeborn	53 min
Jun 14, 11:11 PM CDT	Special Weather Statement	MPX	Freeborn	64 min
Jun 14, 11:52 PM CDT	Areal Flood Warning	MPX	Goodhue	6 hr
Jun 15, 1:21 AM CDT	Areal Flood Advisory	MPX	Faribault, Freeborn, Steele, Waseca	4 hr
Jun 15, 5:51 AM CDT	Areal Flood Warning	MPX	Dakota, Goodhue, Rice	4 hr
Jun 15, 9:31 AM CDT	Areal Flood Warning	MPX	Dakota, Goodhue, Rice	8 hr

Nearby

Areal Flood Warnings in Minnesota, 2012 Every areal 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.