Alert archive / Minnesota / Flash Flood Warnings in 2011

Flash Flood Warning 11, NWS Grand Forks, ND

July 19, 20114 counties in Minnesota

NWS Grand Forks, ND issued this flash flood warning at Jul 19, 2011, 6:44 AM CDT for 4 counties in Minnesota. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 19, 2011, 6:44 AM CDT (11:44 UTC)
Expired
Jul 19, 2011, 10:18 AM CDT
In force
4 hr
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Flood severity
None

Counties Becker County, MN, Hubbard County, MN, Otter Tail County, MN, Wadena County, MN

The radar

The Duluth radar (KDLH), 208 km from the middle of the area, began a volume at 11:46 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, 11.7 hours before the alert went out and 220 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 2011-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3580 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 00:00Z on 2011-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
3580 J/kg
Mixed-layer CIN
-157 J/kg
Mixed-layer LCL
1388 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
25 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

616 
WGUS53 KFGF 191146
FFWFGF
MNC005-057-111-159-191800-
/O.NEW.KFGF.FF.W.0011.110719T1146Z-110719T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
644 AM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WADENA COUNTY IN CENTRAL MINNESOTA...
  SOUTHERN HUBBARD COUNTY IN NORTH CENTRAL MINNESOTA...
  SOUTHEASTERN BECKER COUNTY IN NORTHWEST MINNESOTA...
  NORTHEASTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 100 PM CDT TUESDAY

* AT 644 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED            
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.     
  THESE STORMS HAVE A HISTORY OF PRODUCING 2 TO 5 INCHES OF RAINFALL 
  IN A VERY SHORT DURATION. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MENAHGA...NEW YORK MILLS...PARK RAPIDS...PERHAM...SEBEKA...STAPLES
  AIRPORT AND VERNDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND DONT DROWN. AVOID DRIVING ON FLOODED ROADS. MOST FLOOD
RELATED DEATHS OCCUR IN AUTOMOBILES.

&&

LAT...LON 4680 9467 4680 9477 4640 9477 4639 9473
      4637 9472 4636 9486 4636 9514 4633 9515
      4645 9561 4698 9559 4693 9465 4681 9465

$$

TG
1 follow-up statement
724 
WGUS73 KFGF 191518
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1018 AM CDT TUE JUL 19 2011

MNC005-057-111-159-191533-
/O.CAN.KFGF.FF.W.0011.000000T0000Z-110719T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUBBARD MN-WADENA MN-OTTER TAIL MN-BECKER MN-
1018 AM CDT TUE JUL 19 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN
BECKER...NORTHEASTERN OTTER TAIL...WADENA AND SOUTHERN HUBBARD
COUNTIES...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND DONT DROWN. AVOID DRIVING ON FLOODED ROADS. MOST FLOOD
RELATED DEATHS OCCUR IN AUTOMOBILES.

&&

LAT...LON 4680 9467 4680 9477 4640 9477 4639 9473
      4637 9472 4636 9486 4636 9514 4633 9515
      4645 9561 4698 9559 4693 9465 4681 9465

$$

VG

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 19, 4:47 AM CDTSevere Thunderstorm WarningFGFClay58 min
Jul 19, 5:14 AM CDTFlash Flood WarningFGFClay5 hr
Jul 19, 5:15 AM CDTSevere Thunderstorm WarningFGFBecker, Clay, Otter Tail, Wilkin60 min
Jul 19, 5:45 AM CDTFlash Flood WarningFGFClay5 hr
Jul 19, 6:00 AM CDTFlash Flood WarningFGFBecker, Otter Tail4 hr
Jul 19, 6:00 AM CDTSevere Thunderstorm WarningFGFBecker, Otter Tail60 min
Jul 19, 6:50 AM CDTSevere Thunderstorm WarningFGFBecker, Hubbard, Otter Tail, Wadena55 min
Jul 19, 10:00 AM CDTRiver Flood WarningFGFClay25 hr
Jul 19, 10:00 AM CDTRiver Flood WarningFGFClay49 hr
Jul 19, 2:15 PM CDTAreal Flood AdvisoryFGFBeltrami, Clearwater10 hr

Nearby

Flash Flood Warnings in Minnesota, 2011Every flash flood warning in 2011

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.