Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 28, NWS Twin Cities, MN

September 21, 20164 counties in Minnesota

NWS Twin Cities, MN issued this flash flood warning at Sep 21, 2016, 6:50 PM CDT for 4 counties in Minnesota. It was in force for 9 hr. 16 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
Sep 21, 2016, 6:50 PM CDT (23:50 UTC)
Expired
Sep 22, 2016, 3:45 AM CDT
In force
9 hr
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Flood severity
None

Counties Anoka County, MN, Hennepin County, MN, Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 50 km from the middle of the area, began a volume at 23:52 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
Sep 21, 7:15 PM CDTHEAVY RAIN 3.561 Wnw Maple Grove, MNONE HOUR RAINFALL TOTAL.
Sep 21, 7:15 PM CDTHEAVY RAIN 3.752 Ne Brooklyn Park, MNRAINFALL SINCE 500 PM.
Sep 21, 7:16 PM CDTHEAVY RAIN 3.431 Ssw Maple Grove, MNONE HOUR RAINFALL TOTAL.
Sep 21, 7:16 PM CDTHEAVY RAIN 3.431 Sw Maple Grove, MNONE HOUR RAINFALL TOTAL.
Sep 21, 7:17 PM CDTHEAVY RAIN 2.081 Ese Osseo, MNONE HOUR RAINFALL TOTAL.
Sep 21, 7:17 PM CDTHEAVY RAIN 2.081 W Brooklyn Park, MNONE HOUR RAINFALL TOTAL.
Sep 21, 7:49 PM CDTFLASH FLOOD3 Se Coon Rapids, MNUNIVERSITY AVENUE AND COUNTY ROAD 47 CLOSED DUE TO ONE FOOT WATER OVER ROADS NEAR NORTH TOWN MALL. .
Sep 21, 7:49 PM CDTFLASH FLOOD3 Se Coon Rapids, MNUNIVERSITY AVENUE AND HWY 47 CLOSED DUE TO ONE FOOT WATER OVER ROADS NEAR NORTH TOWN MALL. .
Sep 21, 8:25 PM CDTHEAVY RAIN 53 Nnw Fridley, MNJUST OVER 5 INCHES RECORDED BY MNGAGE/HIGH DENSITY NETWORK. .
Sep 21, 8:45 PM CDTFREEZING RAIN 5.52 W Mounds View, MNRAINFALL TOTAL IN 4 HOURS.
Sep 21, 8:45 PM CDTHEAVY RAIN 5.52 W Mounds View, MNRAINFALL TOTAL IN 4 HOURS.
Sep 21, 8:49 PM CDTFLASH FLOOD2 Nne Brooklyn Park, MNWATER OVER THE NOBLE PARKWAY AND OUT OF THE BANKS OF SHINGLE CREEK.
Sep 21, 9:44 PM CDTHEAVY RAIN 7.151 S Maple Grove, MNRAINFALL TOTAL SINCE 615 PM.
Sep 21, 9:48 PM CDTFLASH FLOOD1 Ese Osseo, MNNUMEROUS ROADS CLOSED AND SUBMERGED VEHICLES IN THE MAPLE GROVE BROOKLYN PARK REGION OF HENNEPIN COUNTY.
Sep 21, 10:15 PM CDTFLASH FLOOD2 N Fridley, MNNUMEROUS ROADS ARE UNDER WATER EITHER SIDE OF UNIVERSITY AVE...BETWEEN 610 AT COON RAPIDS BLVD AND I-694.
Sep 22, 12:23 AM CDTHEAVY RAIN 9.862 W Maple Grove, MNRAINFALL TOTAL SINCE THIS MORNING.

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, 11.8 hours before the alert went out and 52 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 2016-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 515 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2016-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
515 J/kg
Mixed-layer CIN
-331 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.0
Supercell composite
8.5

Open this sounding in Storm Lab

The text

As transmitted.

466 
WGUS53 KMPX 212350
FFWMPX
MNC003-053-123-163-220345-
/O.NEW.KMPX.FF.W.0028.160921T2350Z-160922T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
650 PM CDT WED SEP 21 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 1045 PM CDT

* AT 649 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MINNEAPOLIS...BROOKLYN PARK...PLYMOUTH...MAPLE GROVE...
  COON RAPIDS...BLAINE...ROSEVILLE...BROOKLYN CENTER...FRIDLEY...
  SHOREVIEW...WHITE BEAR LAKE AND CHAMPLIN.

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE
WARNED AREA.

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 4525 9276 4521 9275 4519 9277 4511 9274
      4510 9277 4503 9321 4504 9377 4513 9371
      4515 9365

$$

BORGHOFF
3 follow-up statements
360 
WGUS73 KMPX 220031
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
731 PM CDT WED SEP 21 2016

MNC003-053-123-163-220345-
/O.CON.KMPX.FF.W.0028.000000T0000Z-160922T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON MN-HENNEPIN MN-ANOKA MN-RAMSEY MN-
731 PM CDT WED SEP 21 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
NORTHERN WASHINGTON...NORTHERN HENNEPIN...SOUTHEASTERN ANOKA AND
NORTHERN RAMSEY COUNTIES...

AT 728 PM CDT...LOCAL LAW ENFORCEMENT REPORTS SEVERAL ROADS AND
INTERSECTIONS ARE IMPASSIBLE IN MAPLE GROVE...OSSEO...AND BROOKLYN
PARK. 2 TO 4.5 INCHES OF RAIN HAVE FALLEN IN THE PAST HOUR AND A
HALF. TRAVEL IN THIS AREA IS NOT ADVISED!

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MINNEAPOLIS...BROOKLYN PARK...PLYMOUTH...MAPLE GROVE...COON RAPIDS...
BLAINE...ROSEVILLE...BROOKLYN CENTER...FRIDLEY...SHOREVIEW...
WHITE BEAR LAKE AND CHAMPLIN.

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE
WARNED AREA WHICH WOULD RESULT IN WIDESPREAD...POTENTIALLY
SIGNIFICANT FLASH FLOODING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

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 4525 9276 4521 9275 4519 9277 4511 9274
      4510 9277 4503 9321 4504 9377 4513 9371
      4515 9365

$$

BORGHOFF
577 
WGUS53 KMPX 220254
FFWMPX
MNC003-053-123-163-220845-
/O.EXT.KMPX.FF.W.0028.000000T0000Z-160922T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
954 PM CDT WED SEP 21 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 345 AM CDT

* AT 951 PM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH
  FLOODING OCCURRING IN THE WARNED AREA. NUMEROUS ROADS ARE CLOSED
  WITH CARS SUBMERGED...PARTICULARLY IN THE MAPLE GROVE AND BROOKLYN
  PARK AREAS. 4 TO 7 INCHES OF RAIN HAVE FALLEN WITH AN ADDITIONAL 1
  TO 3 INCHES POSSIBLE DURING THE NEXT FEW HOURS. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MINNEAPOLIS...BROOKLYN PARK...PLYMOUTH...MAPLE GROVE...
  COON RAPIDS...BLAINE...ROSEVILLE...BROOKLYN CENTER...FRIDLEY...
  SHOREVIEW...WHITE BEAR LAKE AND CHAMPLIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

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 4525 9276 4521 9275 4519 9277 4511 9274
      4510 9277 4503 9321 4504 9377 4513 9371
      4515 9365

$$

BORGHOFF
402 
WGUS73 KMPX 220841
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
341 AM CDT THU SEP 22 2016

MNC003-053-123-163-220848-
/O.EXP.KMPX.FF.W.0028.000000T0000Z-160922T0845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON MN-HENNEPIN MN-ANOKA MN-RAMSEY MN-
341 AM CDT THU SEP 22 2016

...THE FLASH FLOOD WARNING FOR NORTHERN WASHINGTON...NORTHERN
HENNEPIN...SOUTHEASTERN ANOKA AND NORTHERN RAMSEY COUNTIES WILL
EXPIRE AT 345 AM CDT...

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

LAT...LON 4525 9276 4521 9275 4519 9277 4511 9274
      4510 9277 4503 9321 4504 9377 4513 9371
      4515 9365

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 20, 9:49 PM CDTSpecial Weather StatementMPXNicollet26 min
Sep 20, 10:23 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Waseca37 min
Sep 20, 10:32 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Le Sueur, Nicollet, Sibley33 min
Sep 20, 10:49 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Waseca41 min
Sep 20, 11:20 PM CDTSpecial Weather StatementMPXDakota25 min
Sep 20, 11:37 PM CDTSpecial Weather StatementMPXRamsey23 min
Sep 20, 11:50 PM CDTSpecial Weather StatementMPXSteele, Waseca40 min
Sep 20, 11:59 PM CDTFlash Flood WarningMPXSteele, Waseca3 hr
Sep 21, 12:06 AM CDTSevere Thunderstorm WarningMPXSteele, Waseca24 min
Sep 21, 12:25 AM CDTSevere Thunderstorm WarningMPXFreeborn, Steele, Waseca35 min
Sep 21, 1:00 AM CDTSevere Thunderstorm WarningMPXSteele30 min
Sep 21, 1:58 AM CDTSpecial Weather StatementMPXGoodhue62 min
Sep 21, 10:54 AM CDTSpecial Weather StatementMPXFreeborn21 min
Sep 21, 2:32 PM CDTSpecial Weather StatementMPXDakota43 min
Sep 21, 4:04 PM CDTSpecial Weather StatementMPXRamsey26 min
Sep 21, 4:39 PM CDTSpecial Weather StatementMPXWashington36 min
Sep 21, 4:42 PM CDTSevere Thunderstorm WarningMPXWashington33 min
Sep 21, 5:48 PM CDTSpecial Weather StatementMPXFreeborn42 min
Sep 21, 6:15 PM CDTSpecial Weather StatementMPXWright45 min
Sep 21, 6:20 PM CDTSpecial Weather StatementMPXHennepin40 min
Sep 21, 6:33 PM CDTSevere Thunderstorm WarningMPXHennepin42 min
Sep 21, 6:33 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker, Stearns42 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.