Alert archive / Minnesota / Tornado Warnings in 2012

Tornado Warning 11, NWS Grand Forks, ND

August 3, 2012Clearwater County, Polk County, Red Lake County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Aug 3, 2012, 7:22 PM CDT for Clearwater County, Polk County, Red Lake County, Minnesota. It was in force for 39 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
Aug 3, 2012, 7:22 PM CDT (00:22 UTC)
Expired
Aug 3, 2012, 8:01 PM CDT
In force
39 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon

Counties Clearwater County, MN, Polk County, MN, Red Lake County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 124 km from the middle of the area, began a volume at 00:22 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.

IssuedProductOfficeLasted
Aug 3, 2:14 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.4 hours before the alert went out and 199 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-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 2012-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 96 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2012-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
96 J/kg
Mixed-layer CIN
-168 J/kg
Mixed-layer LCL
1457 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

282 
WFUS53 KFGF 040022
TORFGF
MNC029-119-125-040100-
/O.NEW.KFGF.TO.W.0011.120804T0022Z-120804T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
722 PM CDT FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CLEARWATER COUNTY IN NORTHWEST MINNESOTA...
  EAST CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA...
  SOUTHEASTERN RED LAKE COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 800 PM CDT

* AT 717 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
  LOCATED 3 MILES NORTHWEST OF ERSKINE...OR 30 MILES SOUTH OF THIEF
  RIVER FALLS...MOVING TO THE NORTHEAST AT 35 MPH.

* THE TORNADIC STORM WILL BE NEAR...
  OKLEE AROUND 740 PM CDT.
  OLGA AROUND 745 PM CDT.
  TRAIL AROUND 750 PM CDT.
  GULLY AND GONVICK AROUND 755 PM CDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4758 9608 4775 9619 4794 9564 4793 9559
      4796 9558 4801 9541 4778 9527
TIME...MOT...LOC 0022Z 246DEG 30KT 4770 9600

$$

AV
2 follow-up statements
156 
WWUS53 KFGF 040040
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
740 PM CDT FRI AUG 3 2012

MNC029-119-125-040100-
/O.CON.KFGF.TO.W.0011.000000T0000Z-120804T0100Z/
RED LAKE MN-CLEARWATER MN-POLK MN-
740 PM CDT FRI AUG 3 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL POLK...
NORTHERN CLEARWATER AND SOUTHEASTERN RED LAKE COUNTIES IN NORTHWEST
MINNESOTA UNTIL 800 PM CDT...

AT 736 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES SOUTH OF
OKLEE...OR 30 MILES SOUTHEAST OF THIEF RIVER FALLS...MOVING TO THE
NORTHEAST AT 35 MPH.

THE TORNADIC STORM WILL BE NEAR...
  TRAIL AROUND 750 PM CDT.
  GULLY AROUND 755 PM CDT.
  BERNER AND GONVICK AROUND 800 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 4764 9586 4782 9599 4794 9565 4793 9559
      4796 9558 4801 9541 4778 9527
TIME...MOT...LOC 0040Z 246DEG 30KT 4776 9579

$$

AV
693 
WWUS53 KFGF 040101
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
801 PM CDT FRI AUG 3 2012

MNC029-119-125-040109-
/O.CAN.KFGF.TO.W.0011.000000T0000Z-120804T0100Z/
RED LAKE MN-CLEARWATER MN-POLK MN-
801 PM CDT FRI AUG 3 2012

...THE TORNADO WARNING FOR EAST CENTRAL POLK...NORTHERN CLEARWATER
AND SOUTHEASTERN RED LAKE COUNTIES IN NORTHWEST MINNESOTA IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING IS NO LONGER SHOWING TORNADIC 
TENDENCIES.

A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT. 

LAT...LON 4764 9586 4782 9599 4794 9565 4793 9559
      4796 9558 4801 9541 4778 9527
TIME...MOT...LOC 0059Z 246DEG 30KT 4783 9558

$$

AV

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 7:11 PM CDTSevere Thunderstorm WarningFGFClearwater, Mahnomen, Norman, Polk, Red Lake64 min
Aug 3, 7:20 PM CDTSevere Thunderstorm WarningFGFBecker, Clay, Hubbard, Otter Tail, Wadena, Wilkin55 min
Aug 3, 7:32 PM CDTSevere Thunderstorm WarningFGFBecker, Clay, Mahnomen, Norman58 min
Aug 3, 7:44 PM CDTSevere Thunderstorm WarningFGFOtter Tail, Wilkin61 min
Aug 3, 7:54 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Pennington, Polk, Red Lake66 min
Aug 3, 7:57 PM CDTTornado WarningFGFBecker, Clay, Mahnomen, Norman48 min
Aug 3, 8:06 PM CDTSevere Thunderstorm WarningFGFGrant, Otter Tail, Wilkin54 min
Aug 3, 8:12 PM CDTSevere Thunderstorm WarningFGFBecker, Clay, Clearwater, Hubbard, Otter Tail, Wadena63 min
Aug 3, 8:20 PM CDTSevere Thunderstorm WarningFGFBecker, Beltrami, Clearwater, Hubbard, Mahnomen, Norman and 1 more55 min
Aug 3, 8:27 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Lake of the Woods, Marshall, Roseau63 min

Nearby

Tornado Warnings in Minnesota, 2012Every tornado warning in 2012Tornadoes in 2012

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.