Alert archive / North Dakota / Tornado Warnings in 2010

Tornado Warning 113, NWS Grand Forks, ND

August 12, 2010Ransom County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Aug 12, 2010, 7:49 PM CDT for Ransom County, North Dakota. It was in force for 56 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: Aug 12, 2010, 7:49 PM CDT (00:49 UTC)
Expired: Aug 12, 2010, 8:45 PM CDT
In force: 56 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon

County Ransom County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 120 km from the middle of the area, began a volume at 00:50 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
Aug 12, 8:40 PM CDT	TORNADO	7 Nw Lisbon, ND	NWS STORM DAMAGE TEAM CONFIRMED AN EF0 TORNADO WITH WIND SPEEDS ESTIMATED AT 80 MPH. THE TORNADO BEGAN AT 840 PM CDT ABOUT 7 MILES NORTHWEST OF LISBON AND TRACKED INTERMITTENTLY TO 3 MILES NORTHWEST OF LISBON ENDING AROUND 855 PM CDT. TREE DAMAGE AND NUMEROUS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.8 hours before the alert went out and 184 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: 5023 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1129 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 14.8

Open this sounding in Storm Lab

The text

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

381 
WFUS53 KFGF 130049
TORFGF
NDC073-130145-
/O.NEW.KFGF.TO.W.0113.100813T0049Z-100813T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
749 PM CDT THU AUG 12 2010

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 845 PM CDT

* AT 745 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
  LOCATED 7 MILES SOUTHEAST OF LITCHVILLE...OR 25 MILES SOUTH OF
  VALLEY CITY...MOVING TO THE EAST AT 25 MPH.

* THE TORNADIC STORM WILL BE NEAR...
  FORT RANSOM AROUND 805 PM CDT.
  ELLIOTT AROUND 820 PM CDT.
  LISBON AROUND 835 PM CDT.
  ENDERLIN AROUND 840 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE TORNADIC STORM
INCLUDE VENLO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

&&

LAT...LON 4642 9804 4663 9803 4663 9736 4636 9737
TIME...MOT...LOC 0049Z 274DEG 23KT 4657 9808

$$
DK

1 follow-up statement

560 
WWUS53 KFGF 130119
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
819 PM CDT THU AUG 12 2010

NDC073-130145-
/O.CON.KFGF.TO.W.0113.000000T0000Z-100813T0145Z/
RANSOM ND-
819 PM CDT THU AUG 12 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR RANSOM COUNTY IN SOUTHEAST
NORTH DAKOTA UNTIL 845 PM CDT...

AT 813 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES WEST OF
FORT RANSOM...OR 28 MILES SOUTH OF VALLEY CITY...MOVING TO THE EAST
AT 25 MPH.

A FUNNEL CLOUD WAS SPOTTED AROUND 815 PM CDT 10 MILES WEST OF FORT 
RANSOM NEAR THE RANSOM AND LAMOURE COUNTY LINE.

THE TORNADIC STORM WILL BE NEAR...
  ELLIOTT AROUND 835 PM CDT.
  LISBON...ENDERLIN AND VENLO AROUND 845 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE TORNADIC STORM
INCLUDE SHELDON AND ANSELM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

&&

LAT...LON 4642 9804 4663 9803 4663 9736 4636 9737
TIME...MOT...LOC 0118Z 274DEG 23KT 4651 9796

$$
DK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 7:37 PM CDT	Tornado Warning	FGF	Sargent	53 min
Aug 12, 8:30 PM CDT	Tornado Warning Emergency	FGF	Richland, Sargent	45 min
Aug 12, 8:44 PM CDT	Tornado Warning	FGF	Ransom	61 min
Aug 12, 8:50 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	55 min
Aug 12, 9:31 PM CDT	Flash Flood Warning	FGF	Ransom	12 hr
Aug 12, 9:47 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	58 min
Aug 12, 10:34 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	56 min
Aug 13, 1:25 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele	65 min

Nearby

Tornado Warnings in North Dakota, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.