Alert archive / Minnesota / Tornado Warnings in 2011

Tornado Warning 22, NWS Grand Forks, ND

July 4, 2011Polk County, Red Lake County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 4, 2011, 7:55 PM CDT for Polk County, Red Lake County, Minnesota. It was in force for 50 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: Jul 4, 2011, 7:55 PM CDT (00:55 UTC)
Expired: Jul 4, 2011, 8:45 PM CDT
In force: 50 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon

Counties Polk County, MN, Red Lake County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 81 km from the middle of the area, began a volume at 00:56 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
Jul 4, 8:05 PM CDT	HAIL 1.25	3 Ne Gentilly, MN	HAIL FELL IN DRIFTS ACROSS A FARMYARD...AND LEFT DIVITS COMPLETELY COVERING CEDAR DECKING.

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

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 4, 3:06 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 4, 7:14 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.9 hours before the alert went out and 240 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: 1540 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1783 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

238 
WFUS53 KFGF 050055
TORFGF
MNC119-125-050145-
/O.NEW.KFGF.TO.W.0022.110705T0055Z-110705T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
755 PM CDT MON JUL 4 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA...
  SOUTHWESTERN RED LAKE COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 845 PM CDT

* AT 751 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
  LOCATED 4 MILES WEST OF HUOT...OR 24 MILES SOUTHWEST OF THIEF RIVER
  FALLS...MOVING TO THE SOUTHEAST AT 15 MPH.

* THE TORNADIC STORM WILL BE NEAR...
  HUOT AROUND 800 PM CDT.
  GENTILLY AROUND 810 PM CDT.
  HAROLD AROUND 815 PM CDT.
  PERAULT AROUND 825 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE TORNADIC STORM
INCLUDE DELORME...MELVIN AND FERTILE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4775 9599 4749 9629 4783 9672 4797 9652
TIME...MOT...LOC 0055Z 307DEG 14KT 4784 9649

$$

ROGERS/TG

3 follow-up statements

727 
WWUS53 KFGF 050104
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
804 PM CDT MON JUL 4 2011

MNC119-125-050145-
/O.CON.KFGF.TO.W.0022.000000T0000Z-110705T0145Z/
RED LAKE MN-POLK MN-
804 PM CDT MON JUL 4 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL POLK AND
SOUTHWESTERN RED LAKE COUNTIES IN NORTHWEST MINNESOTA UNTIL 845 PM
CDT...

AT 800 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 2 MILES NORTHWEST
OF GENTILLY...OR 25 MILES SOUTHWEST OF THIEF RIVER FALLS...MOVING TO
THE SOUTHEAST AT 15 MPH.

THIS STORM IS ALSO CAPABLE OF PRODUCING GOLF BALL SIZE HAIL. 

THE TORNADIC STORM WILL BE NEAR...
  GENTILLY AROUND 810 PM CDT.
  HAROLD AROUND 815 PM CDT.
  PERAULT AROUND 830 PM CDT.
  DELORME AROUND 835 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE TORNADIC STORM
INCLUDE FERTILE...MENTOR...MAPLE BAY...DUGDALE AND MELVIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4749 9629 4780 9668 4795 9647 4775 9599
TIME...MOT...LOC 0104Z 307DEG 14KT 4780 9647

$$

ROGERS/TG

349 
WWUS53 KFGF 050121
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
821 PM CDT MON JUL 4 2011

MNC119-125-050145-
/O.CON.KFGF.TO.W.0022.000000T0000Z-110705T0145Z/
RED LAKE MN-POLK MN-
821 PM CDT MON JUL 4 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL POLK AND CENTRAL
RED LAKE COUNTIES IN NORTHWEST MINNESOTA UNTIL 845 PM CDT...

AT 819 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES EAST OF
HAROLD...OR 29 MILES SOUTH OF THIEF RIVER FALLS...MOVING TO THE
SOUTHEAST AT 15 MPH.

THE TORNADIC STORM WILL BE NEAR...
  MELVIN AND DUGDALE AROUND 835 PM CDT.
  FERTILE...MENTOR AND MAPLE BAY AROUND 845 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 4751 9628 4749 9629 4750 9630 4774 9654
      4788 9635 4771 9604
TIME...MOT...LOC 0121Z 309DEG 14KT 4771 9638

$$

HOPKINS

793 
WWUS53 KFGF 050140
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
840 PM CDT MON JUL 4 2011

MNC119-125-050149-
/O.EXP.KFGF.TO.W.0022.000000T0000Z-110705T0145Z/
RED LAKE MN-POLK MN-
840 PM CDT MON JUL 4 2011

...THE TORNADO WARNING FOR CENTRAL POLK AND CENTRAL RED LAKE COUNTIES
IN NORTHWEST MINNESOTA WILL EXPIRE AT 845 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT TUESDAY.

REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR 
SOUTHWESTERN POLK COUNTY UNTIL 915PM CDT.

LAT...LON 4751 9628 4749 9629 4750 9630 4774 9654
      4788 9635 4771 9604
TIME...MOT...LOC 0139Z 309DEG 14KT 4767 9630

$$

HOPKINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:19 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Pennington, Polk, Red Lake	56 min
Jul 4, 7:43 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Lake of the Woods	48 min
Jul 4, 8:17 PM CDT	Severe Thunderstorm Warning	FGF	Norman, Polk	58 min
Jul 4, 8:50 PM CDT	Tornado Warning	FGF	Norman, Polk	40 min
Jul 4, 9:12 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	63 min
Jul 4, 9:21 PM CDT	Tornado Warning	FGF	Clay	39 min
Jul 4, 9:40 PM CDT	Severe Thunderstorm Warning	FGF	Clay	65 min
Jul 4, 10:29 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Otter Tail, Wilkin	61 min
Jul 4, 11:31 PM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail, Wilkin	59 min
Jul 5, 12:40 AM CDT	Severe Thunderstorm Warning	FGF	Grant	26 min
Jul 5, 3:12 AM CDT	Areal Flood Advisory	FGF	Grant, Otter Tail, Wilkin	9 hr
Jul 5, 4:06 AM CDT	Areal Flood Advisory	FGF	Wilkin	8 hr
Jul 5, 4:24 AM CDT	Severe Thunderstorm Warning	FGF	Wilkin	22 min

Nearby

Tornado Warnings in Minnesota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.