Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 26, NWS Twin Cities, MN

August 29, 2016Benton County, Mille Lacs County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Aug 29, 2016, 8:12 PM CDT for Benton County, Mille Lacs County, Minnesota. It was in force for 4 hr. 1 report 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 29, 2016, 8:12 PM CDT (01:12 UTC)
Expired
Aug 30, 2016, 12:15 AM CDT
In force
4 hr
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Flood severity
None

Counties Benton County, MN, Mille Lacs County, MN

The radar

The Minneapolis radar (KMPX), 104 km from the middle of the area, began a volume at 01:12 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 29, 8:52 PM CDTFLASH FLOODMilaca, MNCARS STALLED OUT ON 5TH AVE.

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, 1.2 hours before the alert went out and 104 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 2016-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2493 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 2016-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 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
2493 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
964 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.9

Open this sounding in Storm Lab

The text

As transmitted.

753 
WGUS53 KMPX 300112
FFWMPX
MNC009-095-300515-
/O.NEW.KMPX.FF.W.0026.160830T0112Z-160830T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
812 PM CDT MON AUG 29 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHEASTERN BENTON COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1215 AM CDT

* AT 811 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. FLASH
  FLOODING IS BEGINNING IN MILACA! 3 TO 5 INCHES OF RAIN HAVE FALLEN
  DURING THE LAST 2 TO 3 HOURS ACROSS MUCH OF THE WARNED AREA. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MILACA...FORESTON...BOCK...GRANITE LEDGE AND RUM RIVER. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4581 9351 4571 9351 4572 9386 4582 9398
      4583 9370

$$

BORGHOFF
2 follow-up statements
439 
WGUS73 KMPX 300212
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
912 PM CDT MON AUG 29 2016

MNC009-095-300515-
/O.CON.KMPX.FF.W.0026.000000T0000Z-160830T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MILLE LACS MN-BENTON MN-
912 PM CDT MON AUG 29 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR
SOUTHERN MILLE LACS AND NORTHEASTERN BENTON COUNTIES...

AT 908 PM CDT...DOPPLER RADAR INDICATED HEAVY RAIN CONTINUING ACROSS
THE WARNED AREA. ESTIMATES OF 5 TO 7 INCHES HAVE FALLEN IN THE PAST
3 HOURS. FLASH FLOODING IS ALREADY OCCURRING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MILACA...FORESTON...BOCK...GRANITE LEDGE AND RUM RIVER. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

LAT...LON 4581 9351 4571 9351 4572 9386 4582 9398
      4583 9370

$$

BORGHOFF
008 
WGUS73 KMPX 300509
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1209 AM CDT TUE AUG 30 2016

MNC009-095-300517-
/O.EXP.KMPX.FF.W.0026.000000T0000Z-160830T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MILLE LACS MN-BENTON MN-
1209 AM CDT TUE AUG 30 2016

...THE FLASH FLOOD WARNING FOR SOUTHERN MILLE LACS AND NORTHEASTERN
BENTON COUNTIES WILL EXPIRE AT 1215 AM CDT...

MILLE LACS COUNTY OFFICIALS REPORTED A COUPLE OF ROADS REMAIN CLOSED
DUE TO HIGH WATER IN THE COUNTY. HOWEVER, WATER IS QUICKLY RECEDING
AND THE FLOODING IS NO LONGER EXPECTED TO POSE A SIGNFICANT THREAT.
PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4581 9351 4571 9351 4572 9386 4582 9398
      4583 9370

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 7:18 PM CDTSpecial Weather StatementMPXKanabec, Mille Lacs42 min
Aug 29, 8:06 PM CDTSpecial Weather StatementMPXKanabec, Mille Lacs24 min
Aug 29, 9:05 PM CDTSpecial Weather StatementMPXChisago55 min
Aug 29, 9:48 PM CDTSpecial Weather StatementMPXWashington57 min
Aug 29, 10:38 PM CDTSpecial Weather StatementMPXSherburne, Wright82 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.