Alert archive / North Dakota / Tornado Warnings in 2020

Tornado Warning 16, NWS Grand Forks, ND

June 30, 2020Griggs County, Nelson County, Steele County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jun 30, 2020, 9:52 PM CDT for Griggs County, Nelson County, Steele County, North Dakota. It was in force for 23 min. 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: Jun 30, 2020, 9:52 PM CDT (02:52 UTC)
Expired: Jun 30, 2020, 10:15 PM CDT
In force: 23 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Griggs County, ND, Nelson County, ND, Steele County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 55 km from the middle of the area, began a volume at 02:51 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
Jun 30, 9:58 PM CDT	TSTM WND GST 59	5 Nw Cooperstown, ND	PEAK WIND MEASURED BY A PERSONAL WEATHER STATION.
Jun 30, 10:00 PM CDT	TSTM WND GST 61	8 Wnw Cooperstown, ND	CORRECTS PREVIOUS TSTM WND GST REPORT FROM 8 WNW COOPERSTOWN. WIND GUST TO 61 MPH MEASURED BY PERSONAL WEATHER STATION.
Jun 30, 10:00 PM CDT	TSTM WND GST 61	8 Wnw Cooperstown, ND	WIND GUST TO 61 MPH MEASURED BY PERSONAL WEATHER STATION.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 30, 6:04 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.9 hours before the alert went out and 226 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: 481 J/kg
Mixed-layer CIN: -213 J/kg
Mixed-layer LCL: 641 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

As transmitted.

866 
WFUS53 KFGF 010252
TORFGF
NDC039-063-091-010315-
/O.NEW.KFGF.TO.W.0016.200701T0252Z-200701T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Forks ND
952 PM CDT Tue Jun 30 2020

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Southeastern Nelson County in northeastern North Dakota...
  Northeastern Griggs County in southeastern North Dakota...
  Northwestern Steele County in southeastern North Dakota...

* Until 1015 PM CDT.
    
* At 951 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Red Willow Lake, or 43 miles southeast of Devils
  Lake, moving northeast at 40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Expect damage to mobile homes, roofs, and vehicles.

* Locations impacted include...
  McVille, Aneta, Binford, Red Willow Lake, Sharon, Kloten and
  Jessie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4786 9805 4768 9788 4767 9788 4767 9787
      4755 9775 4747 9826 4766 9846
TIME...MOT...LOC 0251Z 242DEG 36KT 4762 9830 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

CJ

2 follow-up statements

534 
WWUS53 KFGF 010301
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
1001 PM CDT Tue Jun 30 2020

NDC039-063-091-010315-
/O.CON.KFGF.TO.W.0016.000000T0000Z-200701T0315Z/
Nelson ND-Griggs ND-Steele ND-
1001 PM CDT Tue Jun 30 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR
SOUTHEASTERN NELSON...NORTHEASTERN GRIGGS AND NORTHWESTERN STEELE
COUNTIES...
    
At 1001 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Kloten, or 45 miles southeast of Devils Lake, moving
northeast at 40 mph.

HAZARD...TORNADO.

SOURCE...Radar indicated rotation.

IMPACT...Expect damage to mobile homes, roofs, and vehicles.

Locations impacted include...
McVille, Aneta, Sharon and Kloten. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4786 9805 4768 9788 4767 9788 4767 9787
      4757 9778 4753 9816 4774 9829
TIME...MOT...LOC 0301Z 242DEG 36KT 4767 9816 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

CJ

014 
WWUS53 KFGF 010310
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
1010 PM CDT Tue Jun 30 2020

NDC039-063-091-010319-
/O.EXP.KFGF.TO.W.0016.000000T0000Z-200701T0315Z/
Nelson ND-Griggs ND-Steele ND-
1010 PM CDT Tue Jun 30 2020

...THE TORNADO WARNING FOR SOUTHEASTERN NELSON...NORTHEASTERN GRIGGS
AND NORTHWESTERN STEELE COUNTIES WILL EXPIRE AT 1015 PM CDT...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
southeastern and northeastern North Dakota.

Remember, a Severe Thunderstorm Warning still remains in effect for
northeast Griggs, southern Nelson, and western Steele counties.

LAT...LON 4786 9805 4768 9788 4767 9788 4767 9787
      4757 9778 4753 9816 4774 9829
TIME...MOT...LOC 0309Z 242DEG 36KT 4770 9807 

$$

CJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 7:04 PM CDT	Special Weather Statement	FGF	Grand Forks	41 min
Jun 30, 7:27 PM CDT	Areal Flood Advisory	FGF	Grand Forks	18 hr
Jun 30, 7:59 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy	27 min
Jun 30, 8:20 PM CDT	Special Weather Statement	FGF	Griggs	40 min
Jun 30, 8:23 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Nelson, Steele	52 min
Jun 30, 8:34 PM CDT	Special Weather Statement	FGF	Barnes	56 min
Jun 30, 8:45 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele	30 min
Jun 30, 9:01 PM CDT	Special Weather Statement	FGF	Nelson	59 min
Jun 30, 9:04 PM CDT	Areal Flood Advisory	FGF	Benson, Ramsey, Towner	16 hr
Jun 30, 9:10 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Grand Forks, Griggs, Nelson, Steele	50 min
Jun 30, 9:15 PM CDT	Tornado Warning	FGF	Griggs, Steele	30 min
Jun 30, 9:32 PM CDT	Special Weather Statement	FGF	Barnes, Griggs, Steele	58 min
Jun 30, 9:40 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Eddy, Griggs, Nelson, Steele	50 min
Jun 30, 10:03 PM CDT	Areal Flood Advisory	FGF	Griggs	15 hr
Jun 30, 10:05 PM CDT	Special Weather Statement	FGF	Cavalier, Grand Forks, Pembina, Walsh	55 min
Jun 30, 10:19 PM CDT	Special Weather Statement	FGF	Grand Forks, Steele, Traill	56 min
Jun 30, 10:30 PM CDT	Special Weather Statement	FGF	Barnes	60 min
Jun 30, 10:59 PM CDT	Special Weather Statement	FGF	Pembina	61 min
Jul 1, 12:21 AM CDT	Flash Flood Warning	FGF	Grand Forks, Traill, Walsh	6 hr
Jul 1, 7:03 AM CDT	Areal Flood Warning	FGF	Grand Forks	63 hr
Jul 1, 7:25 AM CDT	Areal Flood Warning	FGF	Benson, Ramsey	28 hr

Nearby

Tornado Warnings in North Dakota, 2020 Every tornado warning in 2020 Tornadoes 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.