Alert archive / Minnesota / Tornado Warnings in 2008

Tornado Warning 41, NWS Grand Forks, ND

July 11, 2008Clearwater County, Mahnomen County, Polk County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 11, 2008, 4:14 PM CDT for Clearwater County, Mahnomen County, Polk County, Minnesota. It was in force for 61 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 11, 2008, 4:14 PM CDT (21:14 UTC)
Expired: Jul 11, 2008, 5:15 PM CDT
In force: 61 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon

Counties Clearwater County, MN, Mahnomen County, MN, Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 135 km from the middle of the area, began a volume at 21:16 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 11, 2:26 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 9.2 hours before the alert went out and 202 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1039 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFGF 112114
TORFGF
MNC029-087-119-112215-
/O.NEW.KFGF.TO.W.0041.080711T2114Z-080711T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
414 PM CDT FRI JUL 11 2008

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL CLEARWATER COUNTY IN NORTHWEST MINNESOTA...
  NORTHEASTERN MAHNOMEN COUNTY IN NORTHWEST MINNESOTA...
  EXTREME SOUTHEASTERN POLK COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 515 PM CDT

* AT 412 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES SOUTH OF
  ISLANDLAKE...OR 37 MILES WEST OF BEMIDJI...MOVING TO THE NORTHEAST
  AT 38 MPH. LAW ENFORCEMENT HAS CONFIRMED A LARGE TORNADO IN      
  EXTREME NORTHEASTERN MAHNOMEN COUNTY. 

* THE TORNADO WILL BE NEAR...
  PINE BEND AT 420 PM CDT...
  EBRO AT 425 PM CDT...
  BAGLEY AT 435 PM CDT...
  LEONARD AT 450 PM CDT...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FRIDAY EVENING
FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4770 9548 4764 9521 4730 9568 4735 9580
TIME...MOT...LOC 2113Z 224DEG 33KT 4740 9565

$$

DR/BB

1 follow-up statement

000 
WWUS53 KFGF 112134
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
434 PM CDT FRI JUL 11 2008

MNC087-119-112144-
/O.CAN.KFGF.TO.W.0041.000000T0000Z-080711T2215Z/
MAHNOMEN MN-POLK MN-
434 PM CDT FRI JUL 11 2008

...THE TORNADO WARNING FOR NORTHEASTERN MAHNOMEN AND EXTREME
SOUTHEASTERN POLK COUNTIES IS CANCELLED...

AT 434 PM CDT...TORNADO MOVED OUT OF THE WARNED AREA IN NORTHEASTERN
MAHNOMEN AND EXTREME SOUTHEASTERN POLK COUNTIES. SO THE WARNING HAS
BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FRIDAY EVENING
FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4752 9538 4751 9539 4746 9546 4745 9546
      4744 9548 4741 9554 4754 9555 4770 9548
      4764 9521
TIME...MOT...LOC 2134Z 224DEG 33KT 4754 9545

$$

MNC029-112215-
/O.CON.KFGF.TO.W.0041.000000T0000Z-080711T2215Z/
CLEARWATER MN-
434 PM CDT FRI JUL 11 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR CENTRAL
CLEARWATER COUNTY...

AT 430 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE TORNADO WAS LOCATED
2 MILES NORTHEAST OF EBRO...OR 28 MILES WEST OF BEMIDJI...MOVING TO
THE NORTHEAST AT 38 MPH.

* THE TORNADO WILL BE NEAR...
  LEONARD BY 450 PM CDT...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FRIDAY EVENING
FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4752 9538 4751 9539 4746 9546 4745 9546
      4744 9548 4741 9554 4754 9555 4770 9548
      4764 9521
TIME...MOT...LOC 2134Z 224DEG 33KT 4754 9545

$$

DR/BB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 10:23 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail, Wilkin	67 min
Jul 10, 11:18 PM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail	57 min
Jul 11, 5:01 AM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Lake of the Woods, Roseau	59 min
Jul 11, 6:40 AM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods, Roseau	63 min
Jul 11, 8:37 AM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods	38 min
Jul 11, 9:10 AM CDT	Severe Thunderstorm Warning	FGF	Marshall, Pennington, Polk	65 min
Jul 11, 2:50 PM CDT	Severe Thunderstorm Warning	FGF	Mahnomen, Norman	55 min
Jul 11, 3:08 PM CDT	Severe Thunderstorm Warning	FGF	Mahnomen, Norman, Polk	67 min
Jul 11, 3:22 PM CDT	Severe Thunderstorm Warning	FGF	Kittson, Marshall, Roseau	53 min
Jul 11, 3:31 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail	59 min
Jul 11, 3:34 PM CDT	Tornado Warning Emergency	FGF	Clearwater, Mahnomen	41 min
Jul 11, 3:37 PM CDT	Tornado Warning	FGF	Clearwater, Polk	38 min
Jul 11, 3:41 PM CDT	Tornado Warning	FGF	Marshall, Roseau	64 min
Jul 11, 3:45 PM CDT	Tornado Warning	FGF	Beltrami, Clearwater, Marshall, Pennington, Polk, Red Lake	60 min
Jul 11, 3:46 PM CDT	Tornado Warning	FGF	Becker, Otter Tail	59 min
Jul 11, 4:13 PM CDT	Tornado Warning	FGF	Becker	40 min
Jul 11, 4:16 PM CDT	Tornado Warning	FGF	Beltrami, Lake of the Woods, Marshall, Roseau	59 min
Jul 11, 4:23 PM CDT	Tornado Warning	FGF	Otter Tail	52 min
Jul 11, 4:40 PM CDT	Tornado Warning	FGF	Clearwater, Polk	44 min
Jul 11, 4:40 PM CDT	Tornado Warning	FGF	Otter Tail, Wadena	41 min
Jul 11, 4:44 PM CDT	Tornado Warning	FGF	Lake of the Woods, Roseau	61 min
Jul 11, 5:00 PM CDT	Severe Thunderstorm Warning	FGF	Hubbard, Wadena	30 min
Jul 11, 5:03 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Lake of the Woods, Marshall, Pennington	57 min
Jul 11, 5:17 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	31 min
Jul 11, 6:26 PM CDT	Tornado Warning	FGF	Lake of the Woods	21 min

Nearby

Tornado Warnings in Minnesota, 2008 Every tornado warning in 2008 Tornadoes in 2008

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.