Alert archive / North Dakota / Tornado Warnings in 2018

Tornado Warning 20, NWS Grand Forks, ND

July 4, 20184 counties in North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 4, 2018, 3:09 AM CDT for 4 counties in North Dakota. It was in force for 36 min. 2 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, 2018, 3:09 AM CDT (08:09 UTC)
Expired: Jul 4, 2018, 3:45 AM CDT
In force: 36 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Cavalier County, ND, Pembina County, ND, Ramsey County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 119 km from the middle of the area, began a volume at 08:09 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, 3:15 AM CDT	TSTM WND DMG	3 S Lawton, ND	TREES BLOWN DOWN AND FRONT OF TRAILER HOME DAMAGED.
Jul 4, 3:20 AM CDT	TORNADO 1	5 Wnw Lawton, ND	THIS TORNADO TRACKED ABOUT A MILE TO AROUND 5 NW OF LAWTON BY 321 AM CDT. AN OLD BARN WAS PEELED OPENED, WITH SECTIONS OF WALLS AND ROOF FLUNG TO THE NORTH. TIMBERS PENETRATED INTO ONE OF THE HOMES LOCATED 80 YARDS TO THE NORTH. A DAVIS WIND SENSOR LOCATED JUS

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
Jul 4, 1:34 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 8.2 hours before the alert went out and 260 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: 1282 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1250 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

342 
WFUS53 KFGF 040809
TORFGF
NDC019-067-071-099-040845-
/O.NEW.KFGF.TO.W.0020.180704T0809Z-180704T0845Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
309 AM CDT WED JUL 4 2018

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Southeastern Cavalier County in northeastern North Dakota...
  Northeastern Ramsey County in northeastern North Dakota...
  Northwestern Walsh County in northeastern North Dakota...
  Southwestern Pembina County in northeastern North Dakota...

* Until 345 AM CDT.
    
* At 308 AM CDT, a severe thunderstorm capable of producing a 
  tornado was located near Lawton, or 27 miles northeast of Devils 
  Lake, moving northeast at 45 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

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

* This dangerous storm will be near...
  Fairdale and Adams around 325 AM CDT.
  Hove Mobile Park around 335 AM CDT.
  Milton, Osnabrock and Union around 340 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Grand Forks.

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 4820 9829 4827 9852 4875 9820 4861 9785
TIME...MOT...LOC 0808Z 209DEG 40KT 4831 9835 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JK

2 follow-up statements

024 
WWUS53 KFGF 040830
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
330 AM CDT WED JUL 4 2018

NDC071-040839-
/O.CAN.KFGF.TO.W.0020.000000T0000Z-180704T0845Z/
Ramsey ND-
330 AM CDT WED JUL 4 2018

...THE TORNADO WARNING FOR NORTHEASTERN RAMSEY COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 AM CDT for
northeastern North Dakota.

LAT...LON 4861 9785 4845 9803 4853 9832 4854 9832
      4855 9834 4875 9820
TIME...MOT...LOC 0829Z 209DEG 40KT 4852 9817 

$$

NDC019-067-099-040845-
/O.CON.KFGF.TO.W.0020.000000T0000Z-180704T0845Z/
Cavalier ND-Walsh ND-Pembina ND-
330 AM CDT WED JUL 4 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 AM CDT FOR
SOUTHEASTERN CAVALIER...NORTHWESTERN WALSH AND SOUTHWESTERN PEMBINA
COUNTIES...
    
At 329 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Fairdale, or 18 miles southeast of Langdon, moving
northeast at 45 mph.

HAZARD...TORNADO.

SOURCE...Radar indicated rotation.

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

This dangerous storm will be near...
  Milton and Union around 340 AM CDT.
  Osnabrock around 345 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

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 4861 9785 4845 9803 4853 9832 4854 9832
      4855 9834 4875 9820
TIME...MOT...LOC 0829Z 209DEG 40KT 4852 9817 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JK

114 
WWUS53 KFGF 040842
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
342 AM CDT WED JUL 4 2018

NDC019-067-099-040851-
/O.EXP.KFGF.TO.W.0020.000000T0000Z-180704T0845Z/
Cavalier ND-Walsh ND-Pembina ND-
342 AM CDT WED JUL 4 2018

...THE TORNADO WARNING FOR SOUTHEASTERN CAVALIER...NORTHWESTERN WALSH
AND SOUTHWESTERN PEMBINA COUNTIES WILL EXPIRE AT 345 AM 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 900 AM CDT for
northeastern North Dakota.

LAT...LON 4861 9785 4845 9803 4853 9832 4854 9832
      4855 9834 4875 9820
TIME...MOT...LOC 0841Z 209DEG 40KT 4863 9808 

$$

JK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 2:00 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Griggs, Nelson, Ramsey	45 min
Jul 4, 2:26 AM CDT	Tornado Warning	FGF	Benson, Eddy, Nelson, Ramsey	49 min
Jul 4, 2:33 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Eddy, Grand Forks, Griggs, Nelson and 2 more	57 min
Jul 4, 2:37 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Grand Forks, Nelson, Ramsey, Towner and 1 more	53 min
Jul 4, 3:09 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	66 min
Jul 4, 3:24 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	66 min
Jul 4, 3:27 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Grand Forks, Pembina, Ramsey, Walsh	63 min
Jul 4, 4:16 AM CDT	Severe Thunderstorm Warning	FGF	Pembina	59 min

Nearby

Tornado Warnings in North Dakota, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.