Alert archive / North Dakota / Tornado Warnings in 2015

Tornado Warning 36, NWS Grand Forks, ND

July 12, 2015Grand Forks County, Steele County, Traill County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 12, 2015, 3:37 PM CDT for Grand Forks County, Steele County, Traill County, North Dakota. It was in force for 38 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: Jul 12, 2015, 3:37 PM CDT (20:37 UTC)
Expired: Jul 12, 2015, 4:15 PM CDT
In force: 38 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Grand Forks County, ND, Steele County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 22 km from the middle of the area, began a volume at 20:40 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 12, 4:05 PM CDT	HAIL 0.75	6 Ne Northwood, ND

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 12, 3:06 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.6 hours before the alert went out and 273 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: 571 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 2431 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 120 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.

777 
WFUS53 KFGF 122037
TORFGF
NDC035-091-097-122115-
/O.NEW.KFGF.TO.W.0036.150712T2037Z-150712T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
337 PM CDT SUN JUL 12 2015

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN TRAILL COUNTY IN SOUTHEASTERN NORTH DAKOTA...
  NORTHEASTERN STEELE COUNTY IN SOUTHEASTERN NORTH DAKOTA...
  SOUTHEASTERN GRAND FORKS COUNTY IN NORTHEASTERN NORTH DAKOTA...

* UNTIL 415 PM CDT
    
* AT 337 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER HATTON...OR 25 MILES SOUTHWEST OF GRAND
  FORKS...MOVING NORTHEAST AT 30 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

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

* THIS DANGEROUS STORM WILL BE NEAR...
  HOLMES AROUND 355 PM CDT.
  THOMPSON AROUND 415 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 4760 9743 4769 9765 4793 9730 4781 9703
TIME...MOT...LOC 2037Z 230DEG 26KT 4766 9746 

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

$$

DK

2 follow-up statements

237 
WWUS53 KFGF 122045
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
345 PM CDT SUN JUL 12 2015

NDC091-122054-
/O.CAN.KFGF.TO.W.0036.000000T0000Z-150712T2115Z/
STEELE ND-
345 PM CDT SUN JUL 12 2015

...THE TORNADO WARNING FOR NORTHEASTERN STEELE 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 1000 PM CDT FOR
EASTERN NORTH DAKOTA.

LAT...LON 4781 9703 4766 9732 4764 9742 4766 9747
      4767 9748 4767 9753 4770 9763 4793 9730
TIME...MOT...LOC 2044Z 226DEG 22KT 4768 9744 

$$

NDC035-097-122115-
/O.CON.KFGF.TO.W.0036.000000T0000Z-150712T2115Z/
TRAILL ND-GRAND FORKS ND-
345 PM CDT SUN JUL 12 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR
NORTHWESTERN TRAILL AND SOUTHEASTERN GRAND FORKS COUNTIES...
    
AT 344 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR HATTON...OR 23 MILES SOUTHWEST OF GRAND FORKS...
MOVING NORTHEAST AT 25 MPH.

HAZARD...TORNADO AND GOLF BALL SIZE HAIL. 

SOURCE...RADAR INDICATED ROTATION. 

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

THIS DANGEROUS STORM WILL BE NEAR...
  HOLMES AROUND 400 PM CDT.
  THOMPSON AROUND 415 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 4781 9703 4766 9732 4764 9742 4766 9747
      4767 9748 4767 9753 4770 9763 4793 9730
TIME...MOT...LOC 2044Z 226DEG 22KT 4768 9744 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

DK

631 
WWUS53 KFGF 122106
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
406 PM CDT SUN JUL 12 2015

NDC097-122115-
/O.CAN.KFGF.TO.W.0036.000000T0000Z-150712T2115Z/
TRAILL ND-
406 PM CDT SUN JUL 12 2015

...THE TORNADO WARNING FOR NORTHWESTERN TRAILL COUNTY IS CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT 
OF THE WARNED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
NORTHEASTERN NORTH DAKOTA.

LAT...LON 4770 9724 4773 9734 4777 9739 4778 9743
      4779 9749 4793 9730 4781 9703
TIME...MOT...LOC 2105Z 230DEG 26KT 4778 9726 

$$

NDC035-122115-
/O.CON.KFGF.TO.W.0036.000000T0000Z-150712T2115Z/
GRAND FORKS ND-
406 PM CDT SUN JUL 12 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR
SOUTHEASTERN GRAND FORKS COUNTY...
    
AT 405 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR HOLMES...OR 12 MILES SOUTHWEST OF GRAND FORKS...
MOVING NORTHEAST AT 30 MPH.

HAZARD...TORNADO AND GOLF BALL SIZE HAIL. 

SOURCE...RADAR INDICATED ROTATION. 

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

THIS DANGEROUS STORM WILL BE NEAR...
  THOMPSON AROUND 415 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 4770 9724 4773 9734 4777 9739 4778 9743
      4779 9749 4793 9730 4781 9703
TIME...MOT...LOC 2105Z 230DEG 26KT 4778 9726 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

DK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 8:54 PM CDT	Special Weather Statement	FGF	Benson	66 min
Jul 11, 9:17 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Towner	58 min
Jul 11, 10:10 PM CDT	Tornado Warning	FGF	Benson	50 min
Jul 11, 11:01 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	59 min
Jul 11, 11:24 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	36 min
Jul 12, 12:19 AM CDT	Special Weather Statement	FGF	Benson	56 min
Jul 12, 2:41 AM CDT	Special Weather Statement	FGF	Nelson	34 min
Jul 12, 3:48 AM CDT	Special Weather Statement	FGF	Grand Forks	57 min
Jul 12, 4:50 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	55 min
Jul 12, 2:48 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	46 min
Jul 12, 3:55 PM CDT	Severe Thunderstorm Warning	FGF	Nelson, Ramsey, Walsh	65 min
Jul 12, 3:57 PM CDT	Tornado Warning	FGF	Grand Forks, Traill	38 min
Jul 12, 4:03 PM CDT	Tornado Warning	FGF	Grand Forks	42 min
Jul 12, 4:14 PM CDT	Tornado Warning	FGF	Grand Forks, Nelson, Walsh	46 min
Jul 12, 4:46 PM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	59 min
Jul 12, 5:04 PM CDT	Tornado Warning	FGF	Walsh	41 min
Jul 12, 5:29 PM CDT	Severe Thunderstorm Warning	FGF	Walsh	34 min
Jul 12, 5:43 PM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	62 min
Jul 12, 6:23 PM CDT	Tornado Warning	FGF	Cass, Richland	52 min

Nearby

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