Alert archive / North Dakota / Flash Flood Warnings in 2005

Flash Flood Warning 41, NWS Grand Forks, ND

July 11, 2005Walsh County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Jul 11, 2005, 5:56 AM CDT for Walsh County, North Dakota. It was in force for 11 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 11, 2005, 5:56 AM CDT (10:56 UTC)
Expired: Jul 11, 2005, 5:00 PM CDT
In force: 11 hr
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 97 km from the middle of the area, began a volume at 10:59 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

International Fa, MN (KINL), launched 00:00Z, 10.9 hours before the alert went out and 302 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2356 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1500 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 122 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.

000 
WGUS53 KFGF 111058
FFWFGF
NDC099-112200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
556 AM CDT MON JUL 11 2005

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WALSH COUNTY IN NORTHEAST NORTH DAKOTA

* UNTIL 500 PM CDT

* AT 555 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM 4
  MILES WEST OF HERRICK TO 3 MILES EAST OF FOREST RIVER...OR ALONG A
  LINE EXTENDING FROM 8 MILES NORTHEAST OF GRAFTON TO 13 MILES       
  SOUTH OF GRAFTON. THE STORMS PRODUCING VERY HEAVY RAIN WERE        
  MOVING TO THE NORTHEAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE GRAFTON...MINTO...WARSAW AND
  VOSS.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR
VEHICLE INTO WATER OF UNKNOWN DEPTH. ONE OR TWO FEET OF WATER WILL
FLOAT MOST CARS DOWNSTREAM.

LAT...LON 4853 9744 4821 9758 4821 9729 4853 9718

$$

HOPKINS

1 follow-up statement

000 
WGUS73 KFGF 111434
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
933 AM CDT MON JUL 11 2005

NDC099-111453-
WALSH ND-
933 AM CDT MON JUL 11 2005

...THE FLASH FLOOD WARNING FOR EASTERN WALSH COUNTY IS CANCELLED...

AT 933 AM CDT...THE THREAT FOR HEAVY RAIN HAS ENDED ACROSS EASTERN 
WALSH COUNTY FOR TODAY. FLASH FLOODING IS NO LONGER A THREAT. SO THE 
WARNING HAS BEEN CANCELLED.  THE PUBLIC REPORTED AROUND AN INCH OF 
RAIN IN GRAFTON EARLY THIS MORNING. 

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION OR
CABLE TELEVISION FOR ADDITIONAL INFORMATION.

LAT...LON 4853 9744 4821 9758 4821 9729 4853 9718

$$

RIDDLE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:15 PM CDT	Tornado Warning	FGF	Benson	28 min
Jul 10, 7:48 PM CDT	Severe Thunderstorm Warning	FGF	Towner	23 min
Jul 10, 8:44 PM CDT	Severe Thunderstorm Warning	FGF	Benson	61 min
Jul 10, 9:05 PM CDT	Tornado Warning	FGF	Benson	56 min
Jul 10, 9:49 PM CDT	Tornado Warning	FGF	Ramsey, Towner	56 min
Jul 10, 9:58 PM CDT	Severe Thunderstorm Warning	FGF	Towner	62 min
Jul 10, 10:23 PM CDT	Tornado Warning	FGF	Cavalier	67 min
Jul 10, 10:56 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Towner	64 min

Nearby

Flash Flood Warnings in North Dakota, 2005 Every flash flood warning in 2005

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.