Alert archive / North Dakota / Tornado Warnings in 2013

Tornado Warning 6, NWS Grand Forks, ND

July 12, 2013Richland County, Sargent County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 12, 2013, 7:14 PM CDT for Richland County, Sargent 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, 2013, 7:14 PM CDT (00:14 UTC)
Expired: Jul 12, 2013, 8:00 PM CDT
In force: 46 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Richland County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 112 km from the middle of the area, began a volume at 00:15 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, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.2 hours before the alert went out and 163 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: 3608 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1497 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

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

339 
WFUS53 KFGF 130014
TORFGF
NDC077-081-130100-
/O.NEW.KFGF.TO.W.0006.130713T0014Z-130713T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
714 PM CDT FRI JUL 12 2013

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA...
  EASTERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 800 PM CDT

* AT 713 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR FORMAN...AND MOVING EAST AT 20 MPH.

  HAZARD...TORNADO AND GOLF BALL SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
           ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS
           WILL BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS
           LIKELY.

* THIS DANGEROUS STORM WILL BE NEAR...
  RUTLAND AROUND 725 PM CDT.
  CAYUGA AROUND 745 PM CDT.
  HAMLIN AND DE LAMERE AROUND 800 PM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE GENESEO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND
FORKS.

&&

LAT...LON 4615 9778 4629 9738 4629 9728 4632 9728
      4634 9723 4611 9710 4598 9769
TIME...MOT...LOC 0014Z 250DEG 17KT 4610 9761

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

$$

EWENS

1 follow-up statement

535 
WWUS53 KFGF 130053
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
753 PM CDT FRI JUL 12 2013

NDC077-081-130103-
/O.EXP.KFGF.TO.W.0006.000000T0000Z-130713T0100Z/
SARGENT ND-RICHLAND ND-
753 PM CDT FRI JUL 12 2013

...THE TORNADO WARNING FOR WEST CENTRAL RICHLAND AND EASTERN SARGENT
COUNTIES WILL EXPIRE AT 800 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 4615 9778 4629 9738 4629 9728 4632 9728
      4634 9723 4611 9710 4598 9769
TIME...MOT...LOC 0053Z 250DEG 17KT 4616 9736

$$

EWENS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 7:30 PM CDT	Tornado Warning	FGF	Richland, Sargent	45 min
Jul 12, 8:54 PM CDT	Areal Flood Advisory	FGF	Richland	13 hr
Jul 12, 8:56 PM CDT	Severe Thunderstorm Warning	FGF	Richland	49 min
Jul 12, 11:46 PM CDT	Dense Fog Advisory	FGF	Benson, Cass, Cavalier, Eddy, Grand Forks, Griggs and 7 more	8 hr

Nearby

Tornado Warnings in North Dakota, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.