Alert archive / Minnesota / Flash Flood Watches in 2016

Flash Flood Watch 8, NWS Twin Cities, MN

September 22, 201615 counties in Minnesota; Eau Claire County, Pepin County, Pierce County, Wisconsin

NWS Twin Cities, MN issued this flash flood watch at Sep 22, 2016, 3:59 AM CDT for 15 counties in Minnesota; Eau Claire County, Pepin County, Pierce County, Wisconsin. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Sep 22, 2016, 3:59 AM CDT (08:59 UTC)
Expired
Sep 22, 2016, 11:04 AM CDT
In force
7 hr
Issued by
NWS Twin Cities, MN

Counties Blue Earth County, MN, Brown County, MN, Dakota County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Le Sueur County, MN, Martin County, MN, Nicollet County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Waseca County, MN, Watonwan County, MN, Eau Claire County, WI, Pepin County, WI, Pierce County, WI

The radar

The Minneapolis radar (KMPX), 66 km from the middle of the area, began a volume at 08:59 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.0 hours before the alert went out and 66 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 2016-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 144 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 2016-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 428 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
144 J/kg
Mixed-layer CIN
-361 J/kg
Mixed-layer LCL
641 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
428 m²/s²
0-3 km storm-relative helicity
596 m²/s²
Significant tornado parameter
0.0
Supercell composite
11.6

Open this sounding in Storm Lab

The text

As transmitted.

537 
WGUS63 KMPX 220859
FFAMPX

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
359 AM CDT THU SEP 22 2016

...ADDITIONAL FLASH FLOODING REMAINS POSSIBLE...

.A FLASH FLOOD WATCH REMAINS IN EFFECT FOR MUCH OF SOUTHERN
MINNESOTA AS WELL AS PARTS OF WEST CENTRAL WISCONSIN THROUGH
THURSDAY.

WIDESPREAD HEAVY RAINS HAVE FALLEN ACROSS THE AREA MAKING IT MORE
PRONE TO FLASH-FLOODING WITH ANY ADDITIONAL THUNDERSTORMS.

FLOODING IS ALREADY ONGOING ACROSS PARTS OF THE AREA. NUMEROUS
ROADS ARE CLOSED ACROSS SOUTHERN MINNESOTA. DO NOT ATTEMPT TO
DRIVE THROUGH FLOODED ROADS.

MNZ067-069-070-074>078-082>085-091>093-WIZ024-026-028-221700-
/O.CAN.KMPX.FF.A.0007.000000T0000Z-160923T0000Z/
/O.NEW.KMPX.FF.A.0008.160922T0900Z-160923T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SIBLEY-SCOTT-DAKOTA-BROWN-NICOLLET-LE SUEUR-RICE-GOODHUE-WATONWAN-
BLUE EARTH-WASECA-STEELE-MARTIN-FARIBAULT-FREEBORN-PIERCE-PEPIN-
EAU CLAIRE-
INCLUDING THE CITIES OF...GAYLORD...SHAKOPEE...HASTINGS...
NEW ULM...ST PETER...LE SUEUR...FARIBAULT...RED WING...ST JAMES...
MANKATO...WASECA...OWATONNA...FAIRMONT...BLUE EARTH...
ALBERT LEA...RIVER FALLS...PRESCOTT...DURAND...EAU CLAIRE
359 AM CDT THU SEP 22 2016

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF MINNESOTA AND WEST CENTRAL WISCONSIN...INCLUDING
  THE FOLLOWING AREAS...IN MINNESOTA... BLUE
  EARTH...BROWN...DAKOTA...FARIBAULT...FREEBORN...GOODHUE... LE
  SUEUR...MARTIN...NICOLLET...RICE...SCOTT...SIBLEY...
  STEELE...WASECA AND WATONWAN. IN WEST CENTRAL WISCONSIN...EAU
  CLAIRE...PEPIN AND PIERCE.

* THROUGH THIS EVENING

* ADDITIONAL THUNDERSTORMS COULD PRODUCE HEAVY RAINFALL IN THE
  WATCH AREA.

* DUE TO A VERY WET SUMMER AND CURRENT RIVER LEVELS HIGHER THAN
  NORMAL...ANY ADDITIONAL HEAVY RAINFALL WILL CONTRIBUTE TO A
  SIGNIFICANT RISK OF FLOODING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

&&

$$

MNZ051>053-059>063-066-068-WIZ014>016-023-025-027-221000-
/O.CAN.KMPX.FF.A.0007.000000T0000Z-160922T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SHERBURNE-ISANTI-CHISAGO-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-
MCLEOD-CARVER-POLK-BARRON-RUSK-ST. CROIX-DUNN-CHIPPEWA-
INCLUDING THE CITIES OF...ELK RIVER...CAMBRIDGE...CENTER CITY...
MONTICELLO...MINNEAPOLIS...BLAINE...ST PAUL...STILLWATER...
HUTCHINSON...CHASKA...OSCEOLA...RICE LAKE...LADYSMITH...HUDSON...
MENOMONIE...CHIPPEWA FALLS
359 AM CDT THU SEP 22 2016

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR PORTIONS OF MINNESOTA AND WISCONSIN HAS
BEEN CANCELLED. 

$$
1 follow-up statement
358 
WGUS63 KMPX 221604
FFAMPX

FLOOD WATCH
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1104 AM CDT THU SEP 22 2016

MNZ067-069-070-074>078-082>085-091>093-WIZ024-026-028-221715-
/O.CAN.KMPX.FF.A.0008.000000T0000Z-160923T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SIBLEY-SCOTT-DAKOTA-BROWN-NICOLLET-LE SUEUR-RICE-GOODHUE-WATONWAN-
BLUE EARTH-WASECA-STEELE-MARTIN-FARIBAULT-FREEBORN-PIERCE-PEPIN-
EAU CLAIRE-
INCLUDING THE CITIES OF...GAYLORD...SHAKOPEE...HASTINGS...
NEW ULM...ST PETER...LE SUEUR...FARIBAULT...RED WING...ST JAMES...
MANKATO...WASECA...OWATONNA...FAIRMONT...BLUE EARTH...
ALBERT LEA...RIVER FALLS...PRESCOTT...DURAND...EAU CLAIRE
1104 AM CDT THU SEP 22 2016

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR PORTIONS OF MINNESOTA AND WEST CENTRAL
WISCONSIN HAS BEEN CANCELLED. HEAVY RAINFALL HAS ENDED FOR THE
DAY WITH NO ADDITIONAL HEAVY RAINFALL EXPECTED UNTIL POSSIBLY
TONIGHT.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 7:00 PM CDTSevere Thunderstorm WarningMPXHennepin, Wright30 min
Sep 21, 8:10 PM CDTSevere Thunderstorm WarningMPXHennepin, Ramsey50 min
Sep 21, 8:24 PM CDTFlash Flood WarningMPXHennepin, Ramsey3 hr
Sep 21, 10:07 PM CDTFlash Flood WarningMPXBlue Earth, Goodhue, Rice, Steele, Waseca7 hr
Sep 21, 11:11 PM CDTFlash Flood Warning EmergencyMPXAnoka, Hennepin5 hr
Sep 21, 11:21 PM CDTSevere Thunderstorm WarningMPXFreeborn39 min
Sep 22, 12:23 AM CDTFlash Flood WarningMPXBlue Earth, Faribault, Freeborn, Steele, Waseca4 hr
Sep 22, 2:21 AM CDTSpecial Weather StatementMPXLe Sueur, Rice3 hr
Sep 22, 2:29 AM CDTSpecial Weather StatementMPXBlue Earth3 hr
Sep 22, 4:48 AM CDTAreal Flood WarningMPXBlue Earth, Faribault, Freeborn, Steele, Waseca24 hr
Sep 22, 4:57 AM CDTAreal Flood WarningMPXBlue Earth, Goodhue, Le Sueur, Rice, Steele, Waseca24 hr
Sep 22, 4:57 AM CDTRiver Flood WarningMPXGoodhue70 hr
Sep 22, 6:51 AM CDTSpecial Weather StatementMPXWatonwan3 hr
Sep 22, 10:57 AM CDTRiver Flood WarningMPXGoodhue43 hr
Sep 21, 7:12 PM CDTFlash Flood WarningMPXChippewa, Eau Claire4 hr
Sep 21, 7:36 PM CDTFlash Flood WarningMPXDunn, Saint Croix4 hr
Sep 21, 9:03 PM CDTRiver Flood WarningMPXEau Claire4 days
Sep 22, 5:33 AM CDTAreal Flood WarningMPXChippewa, Dunn, Eau Claire24 hr

Nearby

Flash Flood Watches in Minnesota, 2016Flash Flood Watches in Wisconsin, 2016Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.