Alert archive / North Dakota / Tornado Warnings in 2015

Tornado Warning 54, NWS Grand Forks, ND

July 23, 2015Steele County, Traill County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 23, 2015, 11:33 PM CDT for Steele County, Traill County, North Dakota. It was in force for 42 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 23, 2015, 11:33 PM CDT (04:33 UTC)
Expired: Jul 24, 2015, 12:15 AM CDT
In force: 42 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Steele County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 13 km from the middle of the area, began a volume at 04:35 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 24, 12:00 AM CDT	TSTM WND DMG	8 Ne Mayville, ND	LARGE...MATURE TREE DOWN NORTHEAST OF MAYVILLE

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 23, 3:58 PM CDT	Severe Thunderstorm Watch	SPC	11 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.6 hours before the alert went out and 256 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: 1074 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 2327 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

278 
WFUS53 KFGF 240433
TORFGF
NDC091-097-240515-
/O.NEW.KFGF.TO.W.0054.150724T0433Z-150724T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1133 PM CDT THU JUL 23 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...

* UNTIL 1215 AM CDT
    
* AT 1132 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR GOLDEN LAKE...OR 37 MILES SOUTHWEST OF
  GRAND FORKS...MOVING EAST AT 55 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

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

* THIS DANGEROUS STORM WILL BE NEAR...
  PORTLAND AND ROSEVILLE AROUND 1145 PM CDT.
  MAYVILLE AROUND 1150 PM CDT.
  BUXTON AROUND 1200 AM CDT.

ALSO INCLUDES INTERSTATE 29 BETWEEN MILE MARKERS 113 AND 118.
 
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 4744 9776 4765 9773 4761 9705 4736 9716
TIME...MOT...LOC 0432Z 274DEG 47KT 4753 9764 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

TG/DK

2 follow-up statements

562 
WWUS53 KFGF 240442
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1142 PM CDT THU JUL 23 2015

NDC091-097-240515-
/O.CON.KFGF.TO.W.0054.000000T0000Z-150724T0515Z/
TRAILL ND-STEELE ND-
1142 PM CDT THU JUL 23 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR
NORTHWESTERN TRAILL AND EAST CENTRAL STEELE COUNTIES...
    
AT 1141 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR PORTLAND...OR 32 MILES SOUTHWEST OF GRAND FORKS...
MOVING EAST AT 55 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. 

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

THIS DANGEROUS STORM WILL BE NEAR...
  PORTLAND AND ROSEVILLE AROUND 1145 PM CDT.
  MAYVILLE AROUND 1150 PM CDT.
  BUXTON AROUND 1200 AM CDT.

ALSO INCLUDES INTERSTATE 29 BETWEEN MILE MARKERS 113 AND 118.
 
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 4741 9755 4763 9751 4761 9705 4736 9716
TIME...MOT...LOC 0441Z 274DEG 47KT 4752 9746 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

TG/DK

158 
WWUS53 KFGF 240506
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1206 AM CDT FRI JUL 24 2015

NDC091-097-240516-
/O.EXP.KFGF.TO.W.0054.000000T0000Z-150724T0515Z/
TRAILL ND-STEELE ND-
1206 AM CDT FRI JUL 24 2015

...THE TORNADO WARNING FOR NORTHWESTERN TRAILL AND EAST CENTRAL
STEELE COUNTIES WILL EXPIRE AT 1215 AM CDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT FOR
SOUTHEASTERN NORTH DAKOTA.

LAT...LON 4741 9755 4763 9751 4761 9705 4736 9716
TIME...MOT...LOC 0504Z 274DEG 47KT 4752 9746 

$$

TG/DK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 7:25 PM CDT	Severe Thunderstorm Warning	FGF	Towner	65 min
Jul 23, 7:39 PM CDT	Special Weather Statement	FGF	Cavalier	66 min
Jul 23, 8:25 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	65 min
Jul 23, 8:38 PM CDT	Severe Thunderstorm Warning	FGF	Benson	67 min
Jul 23, 8:48 PM CDT	Special Weather Statement	FGF	Cavalier, Pembina	42 min
Jul 23, 9:07 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Walsh	53 min
Jul 23, 9:20 PM CDT	Areal Flood Advisory	FGF	Benson, Ramsey, Towner	9 hr
Jul 23, 9:23 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	52 min
Jul 23, 9:54 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Benson, Eddy, Griggs, Nelson	66 min
Jul 23, 10:09 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Eddy, Nelson, Pembina, Ramsey and 1 more	66 min
Jul 23, 10:40 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Grand Forks, Griggs, Nelson, Steele and 1 more	65 min
Jul 23, 10:58 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom	47 min
Jul 23, 11:14 PM CDT	Tornado Warning	FGF	Grand Forks, Nelson, Steele, Traill	46 min
Jul 23, 11:40 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Grand Forks, Steele, Traill	65 min
Jul 24, 12:34 AM CDT	Severe Thunderstorm Warning	FGF	Cass	56 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.