Alert archive / Minnesota / Flash Flood Warnings in 2020

Flash Flood Warning 2, NWS Grand Forks, ND

July 4, 2020Kittson County, Marshall County, Minnesota

NWS Grand Forks, ND issued this flash flood warning at Jul 4, 2020, 2:05 AM CDT for Kittson County, Marshall County, Minnesota. It was in force for 9 hr. 6 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 4, 2020, 2:05 AM CDT (07:05 UTC)
Expired: Jul 4, 2020, 11:15 AM CDT
In force: 9 hr
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Flood severity: None

Counties Kittson County, MN, Marshall County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 129 km from the middle of the area, began a volume at 07:07 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
Jul 4, 8:00 AM CDT	FLASH FLOOD	4 N Stephen, MN	FIELDS, FARM YARDS, AND FARM ACCESS ROADS FLOODED ACROSS CENTRAL AND NORTHERN SINNOTT TOWNSHIP.
Jul 4, 8:00 AM CDT	FLASH FLOOD	4 N Stephen, MN	FIELDS, FARM YARDS, AND FARM ACCESS ROADS FLOODED ACROSS CENTRAL AND NORTHERN SINNOTT TOWNSHIP.
Jul 4, 8:00 AM CDT	FLASH FLOOD	6 W Donaldson, MN	HEAVY RAINS IN EXCESS OF 4 INCHES PRODUCED WIDESPREAD FIELD AND FARM ACCESS ROAD FLOODING ACROSS SOUTHERN SVEA TOWNSHIP. SOME TOWNSHIP ROADS IMPASSABLE. LOCAL RAIN GAUGES INACCESSIBLE DUE TO FLOOD WATERS.
Jul 4, 8:00 AM CDT	FLASH FLOOD	6 W Donaldson, MN	HEAVY RAINS IN EXCESS OF 4 INCHES PRODUCED WIDESPREAD FIELD AND FARM ACCESS ROAD FLOODING ACROSS SOUTHERN SVEA TOWNSHIP. SOME TOWNSHIP ROADS IMPASSABLE. LOCAL RAIN GAUGES INACCESSIBLE DUE TO FLOOD WATERS.
Jul 4, 8:00 AM CDT	HEAVY RAIN 4.5	4 N Stephen, MN	RAINFALL SINCE MIDNIGHT. AREA FIELDS AND FARMYARDS FLOODED.
Jul 4, 8:00 AM CDT	HEAVY RAIN 4.5	4 N Stephen, MN	RAINFALL SINCE MIDNIGHT. AREA FIELDS AND FARMYARDS FLOODED.

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

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 7.1 hours before the alert went out and 267 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: 1345 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1926 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

653 
WGUS53 KFGF 040705
FFWFGF
MNC069-089-041615-
/O.NEW.KFGF.FF.W.0002.200704T0705Z-200704T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Grand Forks ND
205 AM CDT Sat Jul 4 2020

The National Weather Service in Grand Forks has issued a

* Flash Flood Warning for...
  Southwestern Kittson County in northwestern Minnesota...
  Northwestern Marshall County in northwestern Minnesota...

* Until 1115 AM CDT Saturday.

* At 205 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Hallock, Stephen, Kennedy, Donaldson and Mattson.

LAT...LON 4876 9710 4876 9709 4876 9681 4873 9668
      4842 9674 4843 9703

FLASH FLOOD...RADAR INDICATED

$$

GG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 7:43 PM CDT	Special Weather Statement	FGF	Roseau	62 min
Jul 3, 8:57 PM CDT	Special Weather Statement	FGF	Lake of the Woods	63 min
Jul 3, 9:51 PM CDT	Special Weather Statement	FGF	Lake of the Woods	54 min
Jul 3, 11:58 PM CDT	Special Weather Statement	FGF	Roseau	62 min
Jul 4, 12:02 AM CDT	Special Weather Statement	FGF	Marshall	58 min
Jul 4, 12:07 AM CDT	Severe Thunderstorm Warning	FGF	Marshall, Polk	25 min
Jul 4, 12:32 AM CDT	Special Weather Statement	FGF	Kittson	58 min
Jul 4, 1:32 AM CDT	Special Weather Statement	FGF	Roseau	58 min
Jul 4, 1:36 AM CDT	Special Weather Statement	FGF	Kittson, Marshall	54 min
Jul 4, 2:13 AM CDT	Areal Flood Advisory	FGF	Kittson, Marshall	9 hr
Jul 4, 2:26 AM CDT	Severe Thunderstorm Warning	FGF	Kittson, Marshall	39 min
Jul 4, 4:55 AM CDT	Areal Flood Advisory	FGF	Kittson, Marshall	14 hr
Jul 4, 6:15 AM CDT	Flash Flood Warning	FGF	Kittson, Marshall	8 hr
Jul 4, 9:13 AM CDT	River Flood Warning	FGF	Marshall, Polk	4 days
Jul 4, 9:13 AM CDT	River Flood Warning	FGF	Kittson, Marshall	6 days
Jul 4, 9:13 AM CDT	River Flood Warning	FGF	Kittson	7 days
Jul 4, 10:09 AM CDT	Special Weather Statement	FGF	Polk	66 min
Jul 4, 11:29 AM CDT	Areal Flood Advisory	FGF	Kittson, Marshall	8 hr
Jul 4, 5:01 PM CDT	Special Weather Statement	FGF	Polk, Red Lake	44 min
Jul 4, 5:21 PM CDT	Special Weather Statement	FGF	Beltrami	54 min
Jul 4, 5:45 PM CDT	Special Weather Statement	FGF	Polk, Red Lake	60 min
Jul 4, 5:57 PM CDT	Special Weather Statement	FGF	Roseau	63 min
Jul 4, 6:01 PM CDT	Special Weather Statement	FGF	Lake of the Woods	59 min
Jul 4, 6:09 PM CDT	Special Weather Statement	FGF	Beltrami	66 min
Jul 4, 6:24 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Marshall, Roseau	36 min
Jul 4, 6:25 PM CDT	Areal Flood Advisory	FGF	Polk, Red Lake	12 hr
Jul 4, 6:42 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Marshall	48 min
Jul 4, 6:51 PM CDT	Special Weather Statement	FGF	Lake of the Woods	39 min

Nearby

Flash Flood Warnings in Minnesota, 2020 Every flash flood warning in 2020

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.