Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 21, NWS Twin Cities, MN

August 12, 2016Le Sueur County, Rice County, Waseca County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Aug 12, 2016, 3:59 PM CDT for Le Sueur County, Rice County, Waseca County, Minnesota. It was in force for 4 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
Aug 12, 2016, 3:59 PM CDT (20:59 UTC)
Expired
Aug 12, 2016, 8:00 PM CDT
In force
4 hr
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Flood severity
None

Counties Le Sueur County, MN, Rice County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 67 km from the middle of the area, began a volume at 21:00 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

TimeReportWhereRemark
Aug 12, 6:30 PM CDTFLASH FLOODKilkenny, MNFLOODING HAS CLOSED A FEW ROAD IN TOWN, WITH SEVERAL OTHER ROADS WITH LARGE AMOUNTS OF WATER OVER THEM.
Aug 12, 6:30 PM CDTFLASH FLOODLonsdale, MNA FEW STREET CLOSURES DUE TO HIGH WATER. WATER ALSO NOTED OVER ADDITIONAL ROADWAYS. WATER AFFECTING AREA BUSINESS.
Aug 12, 6:30 PM CDTFLASH FLOODWaseca, MNPORTION OF COUNTY ROAD 2 CLOSED DUE TO HIGH WATER. SEVERAL BUSINESSES AND RESIDENTIAL HOMES HAD WATER IN THEIR BASEMENTS.

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 12:00Z, 9.0 hours before the alert went out and 68 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 12:00Z on 2016-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 296 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 12:00Z on 2016-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -38 square meters per square second.1939587897Sfc1 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
296 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
794 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-38 m²/s²
0-3 km storm-relative helicity
-89 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

105 
WGUS53 KMPX 122059
FFWMPX
MNC079-131-161-130100-
/O.NEW.KMPX.FF.W.0021.160812T2059Z-160813T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
359 PM CDT FRI AUG 12 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN RICE COUNTY IN SOUTH CENTRAL MINNESOTA...
  NORTHERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHEASTERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 800 PM CDT

* AT 357 PM CDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. LOCALIZED TOTALS OF 3 TO 5 INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WASECA...LONSDALE...MONTGOMERY...JANESVILLE...WATERVILLE...
  WEBSTER...ELYSIAN...KILKENNY...SMITHS MILL...VESELI...
  WASECA AIRPORT AND GREENLAND.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4407 9376 4429 9378 4454 9346 4454 9328
      4450 9328 4428 9352 4417 9353 4417 9341
      4404 9341 4402 9357

$$

BORGHOFF
2 follow-up statements
928 
WGUS73 KMPX 122332
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
632 PM CDT FRI AUG 12 2016

MNC079-131-161-130100-
/O.CON.KMPX.FF.W.0021.000000T0000Z-160813T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RICE MN-WASECA MN-LE SUEUR MN-
632 PM CDT FRI AUG 12 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
NORTHWESTERN RICE...NORTHERN WASECA AND SOUTHEASTERN LE SUEUR
COUNTIES...

AT 627 PM CDT...DOPPLER RADAR INDICATED THE HEAVY RAIN HAS ENDED.
HOWEVER...SEVERAL ROADS ARE CLOSED IN THE LONSDALE AND KILKENNY
AREAS WITH HOMES AND BUSINESSES ALSO FLOODED IN THE CITY OF WASECA.
IT WILL TAKE SOME TIME FOR THE FLOOD WATERS TO RECEDE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4407 9376 4429 9378 4454 9346 4454 9328
      4450 9328 4428 9352 4417 9353 4417 9341
      4404 9341 4402 9357

$$

BORGHOFF
549 
WGUS73 KMPX 130057
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
757 PM CDT FRI AUG 12 2016

MNC079-131-161-130106-
/O.EXP.KMPX.FF.W.0021.000000T0000Z-160813T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RICE MN-WASECA MN-LE SUEUR MN-
757 PM CDT FRI AUG 12 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN RICE...NORTHERN WASECA
AND SOUTHEASTERN LE SUEUR COUNTIES WILL EXPIRE AT 800 PM CDT...

THE HEAVY RAIN HAS ENDED AND ADDITIONAL FLOODING IS NOT EXPECTED.
PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4407 9376 4429 9378 4454 9346 4454 9328
      4450 9328 4428 9352 4417 9353 4417 9341
      4404 9341 4402 9357

$$

BORGHOFF

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 12:18 AM CDTSpecial Weather StatementMPXYellow Medicine57 min
Aug 12, 1:23 AM CDTSpecial Weather StatementMPXLac qui Parle, Yellow Medicine82 min
Aug 12, 4:10 AM CDTSpecial Weather StatementMPXRedwood20 min
Aug 12, 4:12 AM CDTSpecial Weather StatementMPXRedwood108 min
Aug 12, 3:44 PM CDTSpecial Weather StatementMPXWaseca76 min

Nearby

Flash Flood Warnings in Minnesota, 2016Every flash flood warning in 2016

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.