Alert archive / North Dakota / Flash Flood Warnings in 2009

Flash Flood Warning 9, NWS Grand Forks, ND

June 18, 2009Cavalier County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Jun 18, 2009, 4:05 PM CDT for Cavalier County, North Dakota. It was in force for 17 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: Jun 18, 2009, 4:05 PM CDT (21:05 UTC)
Expired: Jun 19, 2009, 9:00 AM CDT
In force: 17 hr
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Flood severity: None

County Cavalier County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 169 km from the middle of the area, began a volume at 21:06 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.1 hours before the alert went out and 296 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: 1167 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 1152 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 52 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 182109
FFWFGF
NDC019-190500-
/O.NEW.KFGF.FF.W.0009.090618T2109Z-090619T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
405 PM CDT THU JUN 18 2009

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN CAVALIER COUNTY IN NORTHEAST NORTH DAKOTA...
  THIS INCLUDES THE CITY OF LANGDON...

* UNTIL MIDNIGHT CDT FRIDAY

* AT 401 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING AND INTENSE THUNDERSTORMS CONTINUED TO DEVELOP OVER
  NORTH CENTRAL AND NORTHEAST CAVALIER COUNTY. DOPPLER RADAR 
  ESTIMATES SHOW THAT 3 TO 4 INCHES OF RAIN HAVE FALLEN IN THE MOUNT 
  CARMEL AREA AND SOUTHEAST ALONG THE SOUTH BRANCH OF THE PEMBINA 
  RIVER.

* SOME LOCATIONS IN THE WARNING INCLUDE LANGDON...VANG AND MOUNT
  CARMEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4900 9852 4900 9798 4876 9813 4874 9846

$$

EWENS

3 follow-up statements

000 
WGUS73 KFGF 182358
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
649 PM CDT THU JUN 18 2009

NDC019-190500-
/O.CON.KFGF.FF.W.0009.000000T0000Z-090619T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAVALIER ND-
649 PM CDT THU JUN 18 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
NORTHEASTERN CAVALIER COUNTY...

AT 643 PM CDT...THE PUBLIC REPORTED THAT LOCALIZED HEAVY RAINS OF
2 TO 3 INCHES HAD FALLEN IN THE MOUNT CARMEL AND LANGDON AREAS. 
DOPPLER RADAR SHOWS THAT 2 TO 4 INCHES OF RAIN HAVE FALLEN IN THE
SOUTH BRANCH OF THE PEMBINA RIVER BASIN. RUNOFF FROM THIS WILL LAST 
FOR SEVERAL MORE HOURS AND WILL LIKELY CAUSE RAPID RISES IN A FEW 
AREA CREEKS AND STREAMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN THE DANGERS OF FLASH FLOODING
ARE HARD TO RECOGNIZE.

&&

LAT...LON 4900 9852 4900 9798 4876 9813 4874 9846

$$

EWENS

000 
WGUS53 KFGF 190239
FFWFGF
NDC019-191400-
/O.EXT.KFGF.FF.W.0009.000000T0000Z-090619T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
935 PM CDT THU JUN 18 2009

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN CAVALIER COUNTY IN NORTHEAST NORTH DAKOTA...
  THIS INCLUDES THE CITY OF LANGDON...

* UNTIL 900 AM CDT FRIDAY

* AT 931 PM CDT...HEAVY RAIN FROM THUNDERSTORMS HAS PRODUCED AREAS
  OF FLOODING IN PORTIONS OF NORTH AND EASTERN CAVALIER COUNTY.
  DOPPLER RADAR INDICATED THAT 3 TO 5 INCHES OF RAIN HAVE FALLEN
  IN THE WARNING AREA SINCE MID AFTERNOON THURSDAY. WHILE RADAR 
  INDICATES THAT SHOWERS AND STORMS ARE DECREASING IN 
  COVERAGE...ADDITIONAL RAINFALL WILL CONTINUE THE RUNOFF THROUGH 
  THE OVERNIGHT. THEREFORE THE WARNING IS EXTENDED UNTIL 9AM FRIDAY 
  MORNING.

* SOME LOCATIONS IN THE WARNING INCLUDE LANGDON...VANG AND MOUNT
  CARMEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN THE DANGERS OF FLASH FLOODING
ARE HARD TO RECOGNIZE.

&&

LAT...LON 4900 9852 4900 9798 4876 9813 4874 9846

$$

EWENS

000 
WGUS73 KFGF 191354
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
853 AM CDT FRI JUN 19 2009

NDC019-191402-
/O.EXP.KFGF.FF.W.0009.000000T0000Z-090619T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAVALIER ND-
853 AM CDT FRI JUN 19 2009

...THE FLASH FLOOD WARNING WILL EXPIRE AT 900 AM CDT FOR NORTHEASTERN
CAVALIER COUNTY...

THE HEAVY RAINFALL RESULTING IN FLASH FLOODING LAST EVENING HAS 
SUBSIDED. MOST OF THE STANDING WATER RESULTING FROM THE HEAVY RAIN 
HAS BEEN SOAKED UP OR RAN OFF INTO DITCHES...AND AREAL FLOODING IS 
MINIMAL. THE WARNING WILL EXPIRE AT 900 AM CDT. 

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

LAT...LON 4900 9852 4900 9798 4876 9813 4874 9846

$$
SPEICHER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 1:54 PM CDT	Special Weather Statement	FGF	Ransom	36 min
Jun 18, 2:18 PM CDT	Special Weather Statement	FGF	Pembina	57 min
Jun 18, 2:23 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	52 min
Jun 18, 2:31 PM CDT	Special Weather Statement	FGF	Ransom	29 min
Jun 18, 2:55 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	65 min
Jun 18, 3:16 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	42 min
Jun 18, 3:22 PM CDT	Flash Flood Warning	FGF	Cavalier, Pembina	18 hr
Jun 18, 3:23 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Ransom	41 min
Jun 18, 3:56 PM CDT	Special Weather Statement	FGF	Cavalier	34 min
Jun 18, 4:19 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland	56 min
Jun 18, 4:26 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	64 min
Jun 18, 4:28 PM CDT	Areal Flood Advisory	FGF	Barnes, Cass, Ransom	5 hr
Jun 18, 4:46 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	59 min
Jun 18, 4:52 PM CDT	Tornado Warning	FGF	Richland	53 min
Jun 18, 5:02 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	58 min
Jun 18, 5:33 PM CDT	Tornado Warning	FGF	Richland	57 min
Jun 18, 5:38 PM CDT	Tornado Warning	FGF	Richland	52 min
Jun 18, 6:15 PM CDT	Tornado Warning	FGF	Richland	37 min
Jun 18, 6:41 PM CDT	Areal Flood Advisory	FGF	Cavalier, Towner	3 hr

Nearby

Flash Flood Warnings in North Dakota, 2009 Every flash flood warning in 2009

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.