Alert archive / North Dakota / Tornado Warnings in 2018

Tornado Warning 14, NWS Grand Forks, ND

June 29, 2018Benson County, Ramsey County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jun 29, 2018, 2:27 AM CDT for Benson County, Ramsey County, North Dakota. It was in force for 14 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: Jun 29, 2018, 2:27 AM CDT (07:27 UTC)
Expired: Jun 29, 2018, 2:41 AM CDT
In force: 14 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Benson County, ND, Ramsey County, ND

The radar

The Minot AFB radar (KMBX), 127 km from the middle of the area, began a volume at 07:30 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 29, 2:37 AM CDT	TSTM WND DMG	Oberon, ND	LARGE TREE BRANCHES AND LIMBS BROKEN DOWN AROUND TOWN. A FEW COTTONWOOD TREES BLOWN DOWN IN SHELTER BELTS ACROSS OBERON TOWNSHIP. SHINGLES AND ROOFING TORN UP ON HOUSES. TIME ESTIMATED BASED ON RADAR
Jun 29, 2:37 AM CDT	TSTM WND DMG	Oberon, ND	LARGE TREE BRANCHES AND LIMBS BROKEN DOWN AROUND TOWN. TIME ESTIMATED BASED ON RADAR

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 28, 10:54 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 7.5 hours before the alert went out and 173 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: 2612 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1800 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 11.7

Open this sounding in Storm Lab

The text

As transmitted.

001 
WFUS53 KFGF 290727
TORFGF
NDC005-071-290800-
/O.NEW.KFGF.TO.W.0014.180629T0727Z-180629T0800Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
227 AM CDT FRI JUN 29 2018

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  South central Benson County in northeastern North Dakota...
  West central Ramsey County in northeastern North Dakota...

* Until 300 AM CDT.
    
* At 227 AM CDT, a severe thunderstorm capable of producing a tornado
  was located near Flora, or 26 miles southwest of Devils Lake,
  moving northeast at 35 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

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

* This dangerous storm will be near...
  Oberon around 235 AM CDT.
  Minnewaukan around 245 AM CDT.
  Brinsmade around 255 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.

&&

LAT...LON 4785 9929 4785 9951 4824 9931 4813 9894
TIME...MOT...LOC 0727Z 207DEG 32KT 4792 9936 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Knutsvig

1 follow-up statement

824 
WWUS53 KFGF 290741
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
241 AM CDT FRI JUN 29 2018

NDC005-071-290751-
/O.CAN.KFGF.TO.W.0014.000000T0000Z-180629T0800Z/
Benson ND-Ramsey ND-
241 AM CDT FRI JUN 29 2018

...THE TORNADO WARNING FOR SOUTH CENTRAL BENSON AND WEST CENTRAL
RAMSEY COUNTIES IS CANCELLED...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

A Severe Thunderstorm Watch remains in effect until 800 AM CDT for
northeastern North Dakota.

LAT...LON 4785 9929 4785 9951 4824 9931 4813 9894
TIME...MOT...LOC 0740Z 207DEG 32KT 4803 9927 

$$

Knutsvig

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 8:17 PM CDT	Severe Thunderstorm Warning	FGF	Benson	28 min
Jun 29, 1:48 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	57 min
Jun 29, 2:08 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey	67 min
Jun 29, 2:44 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	46 min
Jun 29, 2:45 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	45 min
Jun 29, 2:59 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Grand Forks, Griggs, Steele, Traill	61 min
Jun 29, 3:15 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Grand Forks, Griggs, Nelson, Ramsey and 2 more	60 min
Jun 29, 3:16 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Sargent	59 min
Jun 29, 3:30 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner, Walsh	45 min
Jun 29, 3:31 AM CDT	Special Weather Statement	FGF	Towner	29 min
Jun 29, 3:40 AM CDT	Tornado Warning	FGF	Grand Forks, Nelson, Steele	35 min
Jun 29, 3:51 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	54 min
Jun 29, 3:58 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Walsh	47 min
Jun 29, 4:06 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	54 min
Jun 29, 4:25 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Traill, Walsh	65 min
Jun 29, 4:57 AM CDT	Severe Thunderstorm Warning	FGF	Richland	63 min
Jun 29, 5:05 AM CDT	High Wind Warning	FGF	Benson, Cavalier, Eddy, Grand Forks, Griggs, Nelson and 5 more	4 hr

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.