Alert archive / Minnesota / Flash Flood Warnings in 2011

Flash Flood Warning 9, NWS Grand Forks, ND

July 19, 2011Clay County, Minnesota; Cass County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Jul 19, 2011, 5:45 AM CDT for Clay County, Minnesota; Cass County, North Dakota. It was in force for 5 hr. 3 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
Jul 19, 2011, 5:45 AM CDT (10:45 UTC)
Expired
Jul 19, 2011, 10:16 AM CDT
In force
5 hr
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Flood severity
None

Counties Clay County, MN, Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 92 km from the middle of the area, began a volume at 10:44 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
Jul 19, 5:52 AM CDTHEAVY RAIN 3.36Sabin, MN
Jul 19, 6:00 AM CDTFLASH FLOODSabin, MN3.36 INCHES OF RAIN IN LESS THAN 1 HOUR.
Jul 19, 7:00 AM CDTFLASH FLOOD2 Sw Sabin, MNSEVERAL SECTIONS OF TOWNSHIP ROADS AND NUMEROUS FARM ACCESS ROADS AND FIELDS WERE FLOODED ACROSS NORTHERN KURTZ AND NORTHERN ELMWOOD TOWNSHIPS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 10.8 hours before the alert went out and 259 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, Aberdeen, SD at 00:00Z on 2011-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6467 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, Aberdeen, SD at 00:00Z on 2011-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
6467 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
882 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
318 m²/s²
Significant tornado parameter
10.1
Supercell composite
42.1

Open this sounding in Storm Lab

The text

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

886 
WGUS53 KFGF 191047
FFWFGF
MNC027-NDC017-191700-
/O.NEW.KFGF.FF.W.0009.110719T1047Z-110719T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLAY COUNTY IN NORTHWEST MINNESOTA...
  EAST CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL NOON CDT

* AT 545 AM CDT...THE PUBLIC REPORTED THUNDERSTORMS WITH VERY HEAVY  
  RAINFALL ACROSS THE WARNED AREA. RAINFALL REPORTS OF 2 TO 4 INCHES 
  IN A VERY SHORT DURATION HAVE BEEN RECEIVED. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  DILWORTH...GLYNDON...AVERILL...BAKER...BRIARWOOD...DALE AND DOWNER.

THE FOLLOWING STREAMS ARE INCLUDED IN THE WARNING...RED RIVER OF THE 
NORTH...HAY CREEK...SOUTH BRANCH BUFFALO RIVER...STONY CREEK AND 
WHISKY CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4697 9619 4663 9618 4673 9686 4682 9686
      4682 9672 4690 9672 4690 9682 4706 9683

$$

TG
1 follow-up statement
055 
WGUS73 KFGF 191516 RRA
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1016 AM CDT TUE JUL 19 2011

MNC027-NDC017-191531-
/O.CAN.KFGF.FF.W.0009.000000T0000Z-110719T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CASS ND-CLAY MN-
1016 AM CDT TUE JUL 19 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CLAY COUNTY IN
NORTHWEST MINNESOTA...AND EAST CENTRAL CASS COUNTY IN SOUTHEAST NORTH
DAKOTA...

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 4697 9619 4663 9618 4673 9686 4682 9686
      4682 9672 4690 9672 4690 9682 4706 9683

$$

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, 6:00 AM CDTFlash Flood WarningFGFBecker, Otter Tail4 hr
Jul 19, 6:00 AM CDTSevere Thunderstorm WarningFGFBecker, Otter Tail60 min
Jul 19, 6:44 AM CDTFlash Flood WarningFGFBecker, Hubbard, Otter Tail, Wadena4 hr
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
Jul 19, 2:25 AM CDTSevere Thunderstorm WarningFGFCass65 min
Jul 19, 2:57 AM CDTSevere Thunderstorm WarningFGFBarnes, Cass, Traill63 min
Jul 19, 3:29 AM CDTSevere Thunderstorm WarningFGFCass61 min
Jul 19, 3:52 AM CDTTornado WarningFGFCass38 min
Jul 19, 4:17 AM CDTAreal Flood AdvisoryFGFCass6 hr
Jul 19, 5:31 AM CDTFlash Flood WarningFGFCass5 hr
Jul 19, 8:52 AM CDTRiver Flood WarningFGFCass6 days
Jul 19, 8:52 AM CDTRiver Flood WarningFGFCass6 days
Jul 19, 8:52 AM CDTRiver Flood WarningFGFCass50 hr

Nearby

Flash Flood Warnings in Minnesota, 2011Flash Flood Warnings in North Dakota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.