Alert archive / North Dakota / Tornado Warnings in 2015

Tornado Warning 40, NWS Grand Forks, ND

July 12, 2015Grand Forks County, Nelson County, Walsh County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 12, 2015, 4:14 PM CDT for Grand Forks County, Nelson County, Walsh County, North Dakota. It was in force for 46 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: Jul 12, 2015, 4:14 PM CDT (21:14 UTC)
Expired: Jul 12, 2015, 5:00 PM CDT
In force: 46 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Grand Forks County, ND, Nelson County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 92 km from the middle of the area, began a volume at 21:15 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.

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, 9.2 hours before the alert went out and 235 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.

861 
WFUS53 KFGF 122114
TORFGF
NDC035-063-099-122200-
/O.NEW.KFGF.TO.W.0040.150712T2114Z-150712T2200Z/

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

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN NELSON COUNTY IN NORTHEASTERN NORTH DAKOTA...
  SOUTHWESTERN WALSH COUNTY IN NORTHEASTERN NORTH DAKOTA...
  NORTHWESTERN GRAND FORKS COUNTY IN NORTHEASTERN NORTH DAKOTA...

* UNTIL 500 PM CDT
    
* AT 413 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER LAKOTA...OR 27 MILES EAST OF DEVILS
  LAKE...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...
  MAPES AROUND 420 PM CDT.
  MICHIGAN AROUND 430 PM CDT.
  WHITMAN AROUND 440 PM CDT.
  DAHLEN AROUND 455 PM CDT.
  FORDVILLE AROUND 500 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 4802 9842 4808 9842 4837 9804 4815 9767
      4788 9830 4802 9844
TIME...MOT...LOC 2113Z 233DEG 26KT 4801 9830 

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

$$

DK

2 follow-up statements

482 
WWUS53 KFGF 122132
SVSFGF

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

NDC035-063-099-122200-
/O.CON.KFGF.TO.W.0040.000000T0000Z-150712T2200Z/
NELSON ND-WALSH ND-GRAND FORKS ND-
432 PM CDT SUN JUL 12 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN NELSON...SOUTHWESTERN WALSH AND NORTHWESTERN GRAND FORKS
COUNTIES...
    
AT 431 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR MICHIGAN...OR 33 MILES EAST OF DEVILS LAKE...MOVING
NORTHEAST AT 30 MPH.

HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. 

SOURCE...RADAR INDICATED ROTATION. 

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

THIS DANGEROUS STORM WILL BE NEAR...
  PETERSBURG AND WHITMAN AROUND 440 PM CDT.
  DAHLEN AROUND 455 PM CDT.
  FORDVILLE AROUND 500 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 4804 9827 4809 9840 4837 9804 4815 9767
      4799 9806 4801 9819
TIME...MOT...LOC 2131Z 237DEG 24KT 4807 9814 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

DTR/DK

619 
WWUS53 KFGF 122155
SVSFGF

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

NDC035-063-099-122204-
/O.EXP.KFGF.TO.W.0040.000000T0000Z-150712T2200Z/
NELSON ND-WALSH ND-GRAND FORKS ND-
455 PM CDT SUN JUL 12 2015

...THE TORNADO WARNING FOR NORTHEASTERN NELSON...SOUTHWESTERN WALSH
AND NORTHWESTERN GRAND FORKS COUNTIES WILL EXPIRE AT 500 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER HEAVY RAIN
IS STILL POSSIBLE WITH THIS THUNDERSTORM.

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

LAT...LON 4804 9827 4809 9840 4837 9804 4815 9767
      4799 9806 4801 9819
TIME...MOT...LOC 2152Z 233DEG 26KT 4807 9814 

$$

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, 3:37 PM CDT	Tornado Warning	FGF	Grand Forks, Steele, Traill	38 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, 4:46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.