Alert archive / North Dakota / Tornado Warnings in 2020

Tornado Warning 14, NWS Grand Forks, ND

June 30, 2020Benson County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jun 30, 2020, 4:17 PM CDT for Benson County, North Dakota. It was in force for 28 min. 1 report 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, 4:17 PM CDT (21:17 UTC)
Expired: Jun 30, 2020, 4:45 PM CDT
In force: 28 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

County Benson County, ND

What was reported inside it

Time	Report	Where	Remark
Jun 30, 4:25 PM CDT	TSTM WND GST 60	12 S Esmond, ND	PUBLIC REPORT OF ESTIMATED 60 MPH WINDS WITH PEA SIZED HAIL AND 4.20 INCHES OF RAINFALL.

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 12:00Z, 9.3 hours before the alert went out and 153 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: 9 J/kg
Mixed-layer CIN: -647 J/kg
Mixed-layer LCL: 1381 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 307 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

664 
WFUS53 KFGF 302117
TORFGF
NDC005-302145-
/O.NEW.KFGF.TO.W.0014.200630T2117Z-200630T2145Z/

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

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Southwestern Benson County in northeastern North Dakota...

* Until 445 PM CDT.
    
* At 417 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Wellsburg, or 41 miles southwest of Devils Lake,
  moving northeast at 20 mph.

  HAZARD...Tornado and ping pong ball size hail.

  SOURCE...Radar indicated rotation.

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

* Locations impacted include...
  Maddock.

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.

&&

LAT...LON 4804 9973 4798 9948 4785 9958 4785 9980
TIME...MOT...LOC 2117Z 203DEG 17KT 4785 9969 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Lynch

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 1:52 PM CDT	Special Weather Statement	FGF	Benson	38 min
Jun 30, 3:07 PM CDT	Special Weather Statement	FGF	Benson	53 min
Jun 30, 3:36 PM CDT	Severe Thunderstorm Warning	FGF	Benson	54 min
Jun 30, 4:28 PM CDT	Severe Thunderstorm Warning	FGF	Benson	62 min
Jun 30, 4:59 PM CDT	Areal Flood Advisory	FGF	Benson	6 hr
Jun 30, 5:01 PM CDT	Special Weather Statement	FGF	Grand Forks	44 min
Jun 30, 5:04 PM CDT	Special Weather Statement	FGF	Benson	41 min
Jun 30, 5:35 PM CDT	Special Weather Statement	FGF	Benson	40 min
Jun 30, 6:27 PM CDT	Special Weather Statement	FGF	Cavalier	48 min

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.