Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 16, NWS Twin Cities, MN

August 10, 20164 counties in Minnesota

NWS Twin Cities, MN issued this flash flood warning at Aug 10, 2016, 7:53 PM CDT for 4 counties in Minnesota. It was in force for 3 hr. 9 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 10, 2016, 7:53 PM CDT (00:53 UTC)
Expired
Aug 10, 2016, 10:45 PM CDT
In force
3 hr
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Flood severity
None

Counties Carver County, MN, Hennepin County, MN, McLeod County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 39 km from the middle of the area, began a volume at 00:53 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 10, 8:06 PM CDTFLASH FLOOD1 S Hutchinson, MNSPOTTER REPORTS POLICE BLOCKING INTERSECTION OF HWY 15 AND GRADE RD. ABOUT 9 INCHES OF WATER ACROSS THE ROAD.
Aug 10, 8:25 PM CDTHEAVY RAIN 1.351 S St. Michael, MN. THE DURATION OF THE HEAVY RAIN EVENT WAS 1 HOUR.
Aug 10, 8:30 PM CDTHEAVY RAIN 2.121 Ne Maple Lake, MN. THE DURATION OF THE HEAVY RAIN EVENT WAS 1 HOUR.
Aug 10, 8:34 PM CDTHEAVY RAIN 2.841 Sw Waconia, MNMESONET STATION WACONIA 1 WSW /WCNCL/. THE DURATION OF THE HEAVY RAIN EVENT WAS 1 HOUR.
Aug 10, 8:40 PM CDTHEAVY RAIN 21 Ene Maple Plain, MN. THE DURATION OF THE HEAVY RAIN EVENT WAS 1 HOUR.
Aug 10, 8:44 PM CDTHEAVY RAIN 2.121 Sw Waconia, MNMESONET STATION WACONIA 1 WSW /WCNCL/.
Aug 10, 8:44 PM CDTHEAVY RAIN 2.121 Sw Waconia, MNMESONET STATION WACONIA 1 WSW /WCNCL/. THE DURATION OF THE HEAVY RAIN EVENT WAS 1 HOUR.
Aug 10, 9:08 PM CDTHEAVY RAIN 1.04Long Lake, MN. THE DURATION OF THE HEAVY RAIN EVENT WAS 1 HOUR.
Aug 10, 10:00 PM CDTHEAVY RAIN 3.24 N Hutchinson, MN. THE DURATION OF THE HEAVY RAIN EVENT WAS 3 HOURS.

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, 0.9 hours before the alert went out and 37 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 2016-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2446 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 2016-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.193958Sfc1 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
2446 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1020 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
1.5
Supercell composite
9.6

Open this sounding in Storm Lab

The text

As transmitted.

651 
WGUS53 KMPX 110053
FFWMPX
MNC019-053-085-171-110345-
/O.NEW.KMPX.FF.W.0016.160811T0053Z-160811T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
753 PM CDT WED AUG 10 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MCLEOD COUNTY IN CENTRAL MINNESOTA...
  NORTHERN CARVER COUNTY IN EAST CENTRAL MINNESOTA...
  WESTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1045 PM CDT

* AT 750 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. THESE STORMS HAVE HAD A HISTORY
  OF PRODUCING 2 TO 4 INCHES OF RAIN IN LESS THAN 90 MINUTES. FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BUFFALO...HUTCHINSON...PLYMOUTH...MAPLE GROVE...EDEN PRAIRIE...
  MINNETONKA...CHASKA...ELK RIVER...CHANHASSEN...ST. MICHAEL...
  OTSEGO AND MONTICELLO.

TOTAL RAINFALL AMOUNTS OF 3 TO 6 INCHES ARE EXPECTED WITHIN 2 TO 3
HOURS.

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.

&&

LAT...LON 4527 9355 4523 9350 4484 9351 4478 9450
      4498 9450 4499 9426 4526 9426 4529 9355

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 7:03 PM CDTFlash Flood WarningMPXKandiyohi, Meeker3 hr
Aug 10, 7:18 PM CDTSpecial Weather StatementMPXChippewa, Swift42 min
Aug 10, 7:37 PM CDTSpecial Weather StatementMPXHennepin, Ramsey, Washington83 min
Aug 10, 8:08 PM CDTFlash Flood WarningMPXAnoka, Hennepin, Ramsey, Washington3 hr
Aug 10, 8:11 PM CDTFlash Flood WarningMPXKandiyohi, Meeker, Renville3 hr
Aug 10, 8:44 PM CDTFlash Flood WarningMPXCarver, Dakota, Hennepin, Scott, Washington3 hr
Aug 10, 10:11 PM CDTAreal Flood WarningMPXKandiyohi12 hr
Aug 10, 11:05 PM CDTSpecial Weather StatementMPXNicollet, Redwood, Sibley85 min
Aug 11, 12:40 AM CDTSpecial Weather StatementMPXChippewa, Lac qui Parle, Renville, Yellow Medicine65 min
Aug 11, 12:49 AM CDTSpecial Weather StatementMPXBlue Earth, Brown, Steele, Waseca, Watonwan41 min
Aug 11, 1:03 AM CDTSpecial Weather StatementMPXDouglas, Pope, Stevens, Todd57 min
Aug 11, 1:53 AM CDTSpecial Weather StatementMPXChippewa, Yellow Medicine52 min
Aug 11, 2:07 AM CDTFlash Flood WarningMPXChippewa, Lac qui Parle, Renville, Yellow Medicine4 hr
Aug 11, 2:28 AM CDTSpecial Weather StatementMPXBlue Earth, Brown, Steele, Waseca, Watonwan47 min
Aug 11, 2:42 AM CDTSpecial Weather StatementMPXBrown, Redwood, Renville63 min
Aug 11, 3:03 AM CDTAreal Flood WarningMPXDouglas, Pope, Stevens110 min
Aug 11, 3:31 AM CDTSpecial Weather StatementMPXBlue Earth, Brown, Martin, Nicollet, Sibley, Watonwan59 min
Aug 11, 4:25 AM CDTSpecial Weather StatementMPXFaribault, Freeborn, Le Sueur, Rice, Steele, Waseca65 min
Aug 11, 5:41 AM CDTSpecial Weather StatementMPXGoodhue64 min
Aug 11, 3:18 PM CDTRiver Flood WarningMPXGoodhue43 hr

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.