Alert archive / North Dakota / Tornado Warnings in 2015

Tornado Warning 10, NWS Grand Forks, ND

June 20, 2015Barnes County, Griggs County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jun 20, 2015, 5:36 PM CDT for Barnes County, Griggs County, North Dakota. It was in force for 39 min. 4 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 20, 2015, 5:36 PM CDT (22:36 UTC)
Expired
Jun 20, 2015, 6:15 PM CDT
In force
39 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Barnes County, ND, Griggs County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 78 km from the middle of the area, began a volume at 22:38 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

TimeReportWhereRemark
Jun 20, 5:49 PM CDTHAIL 0.755 W Hannaford, NDLOTS OF HAIL UP TO PENNY SIZE...STILL ON GROUND AT TIME OF REPORT. SPOTTER MENTIONED CROP DAMAGE SOUTH OF HANNAFORD NEAR WALUM.
Jun 20, 5:59 PM CDTHAIL 1.754 S Hannaford, ND
Jun 20, 6:04 PM CDTHAIL 11 S Hannaford, ND
Jun 20, 6:13 PM CDTHAIL 1.752 Ne Dazey, ND

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, 10.6 hours before the alert went out and 190 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-pSkew-T log-p diagram, Bismarck Municip, ND at 12:00Z on 2015-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 12:00Z on 2015-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -54 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1028 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
-54 m²/s²
0-3 km storm-relative helicity
-6 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

853 
WFUS53 KFGF 202236
TORFGF
NDC003-039-202315-
/O.NEW.KFGF.TO.W.0010.150620T2236Z-150620T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
536 PM CDT SAT JUN 20 2015

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN GRIGGS COUNTY IN SOUTHEASTERN NORTH DAKOTA...
  NORTH CENTRAL BARNES COUNTY IN SOUTHEASTERN NORTH DAKOTA...

* UNTIL 615 PM CDT
    
* AT 535 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER SUTTON...OR 31 MILES EAST OF CARRINGTON...
  MOVING SOUTHEAST AT 30 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...
  REVERE AROUND 545 PM CDT.
  HANNAFORD AND WALUM AROUND 555 PM CDT.
  DAZEY AROUND 600 PM 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 4748 9850 4734 9801 4732 9797 4706 9817
      4727 9847 4732 9847 4733 9850
TIME...MOT...LOC 2235Z 296DEG 34KT 4737 9847 

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

$$

HOPKINS
2 follow-up statements
541 
WWUS53 KFGF 202256
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
556 PM CDT SAT JUN 20 2015

NDC003-039-202315-
/O.CON.KFGF.TO.W.0010.000000T0000Z-150620T2315Z/
GRIGGS ND-BARNES ND-
556 PM CDT SAT JUN 20 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR
SOUTHEASTERN GRIGGS AND NORTH CENTRAL BARNES COUNTIES...
    
AT 556 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER WALUM...OR 25 MILES NORTHWEST OF VALLEY CITY...
MOVING SOUTHEAST AT 40 MPH.

HAZARD...TORNADO AND PING PONG BALL SIZE HAIL. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

THIS DANGEROUS STORM WILL BE NEAR...
  DAZEY AROUND 600 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF A TORNADO OR OTHER SEVERE WEATHER IS SPOTTED...REPORT IT TO THE
NATIONAL WEATHER SERVICE OR YOUR LOCAL NEAREST LAW ENFORCEMENT AGENCY
WHO WILL SEND YOUR REPORT. THIS ACT MAY SAVE LIVES OF OTHERS IN THE
PATH OF DANGEROUS WEATHER.

&&

LAT...LON 4739 9826 4734 9801 4732 9797 4706 9817
      4723 9841
TIME...MOT...LOC 2256Z 296DEG 34KT 4726 9824 

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

$$

HOPKINS
457 
WWUS53 KFGF 202314
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
614 PM CDT SAT JUN 20 2015

NDC003-039-202324-
/O.EXP.KFGF.TO.W.0010.000000T0000Z-150620T2315Z/
GRIGGS ND-BARNES ND-
614 PM CDT SAT JUN 20 2015

...THE TORNADO WARNING FOR SOUTHEASTERN GRIGGS AND NORTH CENTRAL
BARNES COUNTIES WILL EXPIRE AT 615 PM CDT...
    
THE TORNADO THREAT HAS DIMINISHED...THEREFORE 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.
HOWEVER SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4739 9826 4734 9801 4732 9797 4706 9817
      4723 9841
TIME...MOT...LOC 2311Z 296DEG 34KT 4726 9824 

$$

HOPKINS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 10:30 PM CDTSpecial Weather StatementFGFEddy, Nelson60 min
Jun 20, 3:32 PM CDTSevere Thunderstorm WarningFGFBenson28 min
Jun 20, 3:38 PM CDTSevere Thunderstorm WarningFGFCavalier, Ramsey, Towner52 min
Jun 20, 4:12 PM CDTTornado Warning Tornado observedFGFRamsey, Towner33 min
Jun 20, 4:17 PM CDTSevere Thunderstorm WarningFGFBenson43 min
Jun 20, 4:23 PM CDTSevere Thunderstorm WarningFGFBenson, Ramsey, Towner52 min
Jun 20, 4:30 PM CDTSevere Thunderstorm WarningFGFEddy32 min
Jun 20, 4:44 PM CDTTornado WarningFGFRamsey46 min
Jun 20, 4:56 PM CDTTornado WarningFGFBenson, Ramsey49 min
Jun 20, 5:31 PM CDTTornado WarningFGFNelson, Ramsey44 min
Jun 20, 5:41 PM CDTTornado WarningFGFBenson, Eddy, Nelson49 min
Jun 20, 6:03 PM CDTSevere Thunderstorm WarningFGFBarnes, Cass37 min
Jun 20, 6:13 PM CDTSevere Thunderstorm WarningFGFBarnes, Cass, Griggs31 min
Jun 20, 6:25 PM CDTSevere Thunderstorm WarningFGFGrand Forks, Griggs, Nelson, Steele50 min
Jun 20, 6:33 PM CDTSevere Thunderstorm WarningFGFEddy, Griggs, Nelson42 min
Jun 20, 6:58 PM CDTTornado WarningFGFBarnes, Griggs47 min

Nearby

Tornado Warnings in North Dakota, 2015Every tornado warning in 2015Tornadoes in 2015

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.