Alert archive / North Dakota / Tornado Warnings in 2015

Tornado Warning 29, NWS Grand Forks, ND

June 27, 2015Cass County, Traill County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jun 27, 2015, 6:59 PM CDT for Cass County, Traill County, North Dakota. It was in force for 12 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 27, 2015, 6:59 PM CDT (23:59 UTC)
Expired
Jun 27, 2015, 7:11 PM CDT
In force
12 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Cass County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 38 km from the middle of the area, began a volume at 00:02 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 27, 2:42 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 12.0 hours before the alert went out and 287 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, Aberdeen, SD at 12:00Z on 2015-06-27Temperature 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, Aberdeen, SD at 12:00Z on 2015-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.19395878Sfc1 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
1706 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
116 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.

232 
WFUS53 KFGF 272359
TORFGF
NDC017-097-280030-
/O.NEW.KFGF.TO.W.0029.150627T2359Z-150628T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
659 PM CDT SAT JUN 27 2015

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN TRAILL COUNTY IN SOUTHEASTERN NORTH DAKOTA...
  NORTHEASTERN CASS COUNTY IN SOUTHEASTERN NORTH DAKOTA...

* UNTIL 730 PM CDT
    
* AT 659 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR HILLSBORO...OR 32 MILES SOUTH OF GRAND
  FORKS...MOVING SOUTHEAST AT 30 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

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

* THIS DANGEROUS STORM WILL BE NEAR...
  HILLSBORO AROUND 705 PM CDT.
  BLANCHARD AROUND 710 PM CDT.
  KELSO AROUND 720 PM CDT.
  GRANDIN AROUND 730 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 9726 4754 9705 4724 9684 4724 9683
      4719 9683 4719 9684 4718 9683 4718 9685
      4711 9717
TIME...MOT...LOC 2359Z 334DEG 26KT 4744 9713 

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

$$

JK
1 follow-up statement
622 
WWUS53 KFGF 280011
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
711 PM CDT SAT JUN 27 2015

NDC017-097-280020-
/O.CAN.KFGF.TO.W.0029.000000T0000Z-150628T0030Z/
TRAILL ND-CASS ND-
711 PM CDT SAT JUN 27 2015

...THE TORNADO WARNING FOR SOUTHEASTERN TRAILL AND NORTHEASTERN CASS
COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR NORTHWESTERN
MINNESOTA AND SOUTHEASTERN NORTH DAKOTA.

LAT...LON 4748 9726 4754 9705 4724 9684 4724 9683
      4719 9683 4719 9684 4718 9683 4718 9685
      4711 9717
TIME...MOT...LOC 0009Z 334DEG 26KT 4736 9707 

$$

DK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 3:01 PM CDTTornado WarningFGFCavalier, Pembina44 min
Jun 27, 3:34 PM CDTTornado WarningFGFCavalier, Pembina, Walsh41 min
Jun 27, 4:12 PM CDTTornado Warning Tornado observedFGFCavalier, Grand Forks, Nelson, Pembina, Walsh48 min
Jun 27, 4:37 PM CDTTornado WarningFGFGrand Forks, Nelson, Steele38 min
Jun 27, 4:40 PM CDTTornado WarningFGFGrand Forks, Nelson50 min
Jun 27, 4:58 PM CDTTornado WarningFGFBarnes, Cass, Ransom47 min
Jun 27, 5:03 PM CDTSevere Thunderstorm WarningFGFGrand Forks, Walsh27 min
Jun 27, 5:10 PM CDTTornado WarningFGFGrand Forks, Steele50 min
Jun 27, 5:27 PM CDTTornado WarningFGFGrand Forks48 min
Jun 27, 5:39 PM CDTTornado WarningFGFGrand Forks, Steele, Traill51 min
Jun 27, 5:42 PM CDTTornado WarningFGFBarnes, Cass, Ransom48 min
Jun 27, 6:14 PM CDTTornado WarningFGFBarnes, Cass, Steele, Traill46 min
Jun 27, 6:26 PM CDTTornado WarningFGFTraill34 min
Jun 27, 6:30 PM CDTTornado WarningFGFRansom, Richland, Sargent45 min
Jun 27, 6:55 PM CDTTornado WarningFGFCass, Ransom, Richland35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.