Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 26, NWS Grand Forks, ND

July 10, 2011Ransom County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 10, 2011, 4:15 PM CDT for Ransom County, North Dakota. It was in force for 45 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 10, 2011, 4:15 PM CDT (21:15 UTC)
Expired: Jul 10, 2011, 5:00 PM CDT
In force: 45 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon

County Ransom County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 122 km from the middle of the area, began a volume at 21:14 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 10, 2:29 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 9.3 hours before the alert went out and 182 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: 1313 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 909 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

499 
WFUS53 KFGF 102115
TORFGF
NDC073-102200-
/O.NEW.KFGF.TO.W.0026.110710T2115Z-110710T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
415 PM CDT SUN JUL 10 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

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

* UNTIL 500 PM CDT

* AT 410 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
  LOCATED 3 MILES SOUTHWEST OF ENGLEVALE...OR 40 MILES SOUTH OF
  VALLEY CITY...MOVING TO THE EAST AT 25 MPH.

* THE TORNADIC STORM WILL BE NEAR...
  ELLIOTT AROUND 425 PM CDT.
  LISBON AROUND 445 PM CDT.
  VENLO...SHELDON AND ANSELM AROUND 500 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4660 9746 4629 9732 4629 9802 4649 9802
TIME...MOT...LOC 2115Z 258DEG 21KT 4636 9790

$$

HOPKINS

1 follow-up statement

612 
WWUS53 KFGF 102137
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
437 PM CDT SUN JUL 10 2011

NDC073-102200-
/O.CON.KFGF.TO.W.0026.000000T0000Z-110710T2200Z/
RANSOM ND-
437 PM CDT SUN JUL 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR RANSOM COUNTY IN SOUTHEAST
NORTH DAKOTA UNTIL 500 PM CDT...

AT 433 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 2 MILES WEST OF
ELLIOTT...OR 36 MILES SOUTH OF VALLEY CITY...MOVING TO THE EAST AT 25
MPH.

THE TORNADIC STORM WILL BE NEAR...
  LISBON AROUND 455 PM CDT.
  VENLO...SHELDON AND ANSELM AROUND 500 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4660 9746 4629 9732 4629 9802 4649 9802
TIME...MOT...LOC 2137Z 258DEG 21KT 4642 9782

$$

HOPKINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 4:43 PM CDT	Areal Flood Advisory	FGF	Ransom, Richland, Sargent	13 hr
Jul 10, 4:47 PM CDT	Tornado Warning	FGF	Sargent	43 min
Jul 10, 4:59 PM CDT	Severe Thunderstorm Warning	FGF	Ransom	61 min
Jul 10, 5:24 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	66 min
Jul 10, 5:44 PM CDT	Tornado Warning	FGF	Richland	36 min
Jul 10, 6:07 PM CDT	Severe Thunderstorm Warning	FGF	Richland	53 min

Nearby

Tornado Warnings in North Dakota, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.