Alert archive / North Dakota / Flash Flood Warnings in 2016

Flash Flood Warning 6, NWS Grand Forks, ND

August 3, 2016Towner County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Aug 3, 2016, 7:04 PM CDT for Towner County, North Dakota. It was in force for 3 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: Aug 3, 2016, 7:04 PM CDT (00:04 UTC)
Expired: Aug 3, 2016, 10:30 PM CDT
In force: 3 hr
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Flood severity: None

County Towner County, ND

The radar

The Minot AFB radar (KMBX), 112 km from the middle of the area, began a volume at 00:07 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

Time	Report	Where	Remark
Aug 3, 7:30 PM CDT	FLASH FLOOD	3 W Bisbee, ND	HIGHWAY 66 CLOSED DUE TO WATER FLOWING ACROSS. AREA FIELDS AND DITCHES FLOODING TGROUHGOUT GRAINFIELD... SORENSON....NEW CITY AND GERRARD TOWNSHIPS.
Aug 3, 7:30 PM CDT	FLASH FLOOD	3 W Bisbee, ND	HIGHWAY 66 CLOSED DUE TO WATER FLOWING ACROSS. AREA FIELDS AND DITCHES FLOODING THROUGHOUT GRAINFIELD... SORENSON....NEW CITY AND GERRARD TOWNSHIPS.
Aug 3, 9:30 PM CDT	FLASH FLOOD	3 W Bisbee, ND	HIGHWAY 66 CLOSED DUE TO WATER FLOWING ACROSS. AREA FIELDS AND DITCHES FLOODING TGROUHGOUT GRAINFIELD... SORENSON....NEW CITY AND GERRARD TOWNSHIPS.

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

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.1 hours before the alert went out and 225 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: 1397 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 2565 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

135 
WGUS53 KFGF 040004
FFWFGF
NDC095-040330-
/O.NEW.KFGF.FF.W.0006.160804T0004Z-160804T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
704 PM CDT WED AUG 3 2016

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN TOWNER COUNTY IN NORTHEASTERN NORTH DAKOTA...

* UNTIL 1030 PM CDT

* AT 701 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN FROM AGATE ...THROUGH BISBEE TO ARNDT. THE RAIN IS
  REDEVELOPING ACROSS PREVIOUS DRENCHED AREAS OF CENTRAL TOWNER
  COUNTY. RADAR ESTIMATED AS MUCH A 4 TO 6 INCHES OF RAIN HAVE
  FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BISBEE...CONSIDINE AND ARNDT. 

ADDITIONAL RAINFALL AMOUNTS OF AND INCH OR TWO ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

&&

LAT...LON 4849 9949 4870 9949 4872 9923 4852 9919

$$

GUST

1 follow-up statement

880 
WGUS73 KFGF 040320
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1020 PM CDT WED AUG 3 2016

NDC095-040330-
/O.EXP.KFGF.FF.W.0006.000000T0000Z-160804T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOWNER ND-
1020 PM CDT WED AUG 3 2016

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN TOWNER COUNTY WILL EXPIRE
AT 1030 PM CDT...

FLOOD WATERS HAVE RECEDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. 


LAT...LON 4849 9949 4870 9949 4872 9923 4852 9919

$$

GUST

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 7:15 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Ramsey, Walsh	60 min
Aug 3, 7:29 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner, Walsh	46 min
Aug 3, 7:38 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	52 min
Aug 3, 7:55 PM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	65 min
Aug 3, 8:14 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey	61 min
Aug 3, 8:19 PM CDT	Tornado Warning	FGF	Ramsey	41 min
Aug 3, 8:24 PM CDT	Tornado Warning	FGF	Benson, Eddy	51 min
Aug 3, 9:13 PM CDT	Tornado Warning	FGF	Eddy, Nelson	47 min
Aug 3, 9:54 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Nelson, Steele	20 min
Aug 3, 10:12 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	48 min
Aug 3, 10:22 PM CDT	Special Weather Statement	FGF	Grand Forks	53 min
Aug 3, 10:29 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	61 min
Aug 3, 11:01 PM CDT	Flash Flood Warning	FGF	Grand Forks	2 hr
Aug 3, 11:16 PM CDT	Special Weather Statement	FGF	Ransom	44 min
Aug 3, 11:52 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	38 min
Aug 4, 12:20 AM CDT	Severe Thunderstorm Warning	FGF	Cass	40 min

Nearby

Flash Flood Warnings in North Dakota, 2016 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.