Alert archive / Minnesota / Tornado Warnings in 2013

Tornado Warning 17, NWS Grand Forks, ND

September 11, 2013Lake of the Woods County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Sep 11, 2013, 3:24 PM CDT for Lake of the Woods County, Minnesota. It was in force for 51 min. 3 reports 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: Sep 11, 2013, 3:24 PM CDT (20:24 UTC)
Expired: Sep 11, 2013, 4:15 PM CDT
In force: 51 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Observed
Hail: 1.0 in

County Lake of the Woods County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 239 km from the middle of the area, began a volume at 20:27 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
Sep 11, 3:30 PM CDT	HAIL 1	6 N Williams, MN	ALSO SAW WALL CLOUD
Sep 11, 3:30 PM CDT	HAIL 1.5	7 N Williams, MN	BRANCHES ALSO COMING OFF TREES, A LOT OF PING PONG HAIL.
Sep 11, 3:50 PM CDT	HAIL 1	4 S Graceton, MN	HAIL COVERED THE GROUND ABOUT AN INCH DEEP.

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

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 8.4 hours before the alert went out and 102 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: 390 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 28 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.

249 
WFUS53 KFGF 112024
TORFGF
MNC077-112115-
/O.NEW.KFGF.TO.W.0017.130911T2024Z-130911T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
324 PM CDT WED SEP 11 2013

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL LAKE OF THE WOODS COUNTY IN NORTH CENTRAL MINNESOTA...

* UNTIL 415 PM CDT

* AT 322 PM CDT...A CONFIRMED TORNADO WAS LOCATED 6 MILES NORTH OF
  GRACETON...AND MOVING SOUTHEAST AT 30 MPH.

  HAZARD...TORNADO AND QUARTER SIZE HAIL.

  SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

  IMPACT...SPORADIC DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.

* THE TORNADO WILL BE NEAR...
  GRACETON AROUND 330 PM CDT.
  PITT AROUND 335 PM CDT.
  BAUDETTE AROUND 350 PM CDT.
  CLEMENTSON AROUND 400 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND
FORKS.

&&

LAT...LON 4876 9508 4895 9489 4888 9467 4878 9468
      4873 9458 4872 9454 4870 9450 4870 9443
      4869 9442 4853 9442
TIME...MOT...LOC 2024Z 300DEG 28KT 4882 9483

TORNADO...OBSERVED
HAIL...1.00IN

$$

JK/BB

3 follow-up statements

357 
WWUS53 KFGF 112035
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
335 PM CDT WED SEP 11 2013

MNC077-112115-
/O.CON.KFGF.TO.W.0017.000000T0000Z-130911T2115Z/
LAKE OF THE WOODS MN-
335 PM CDT WED SEP 11 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL LAKE OF THE WOODS
COUNTY UNTIL 415 PM CDT...

AT 332 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR GRACETON...AND MOVING SOUTHEAST AT 30 MPH.

HAZARD...TORNADO AND PING PONG BALL SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION. PING PONG SIZED HAIL REPORTED AT 
ZIPPEL BAY.

IMPACT...SPORADIC DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.

THIS DANGEROUS STORM WILL BE NEAR...
  PITT AROUND 340 PM CDT.
  BAUDETTE AROUND 355 PM CDT.
  CLEMENTSON AROUND 405 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND
FORKS.

IF ON OR NEAR FOURMILE BAY...GET AWAY FROM THE WATER AND MOVE TO 
SHELTER. TORNADOES CAN MOVE ACROSS WATER. IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. BOATS CAN 
BE SWAMPED BY LARGE CAPSIZING WAVES CAUSED BY A TORNADO...EVEN ON 
SMALL BODIES OF WATER. MOVE INTO DOCK AND SEEK SAFE SHELTER NOW.

&&

LAT...LON 4876 9508 4895 9489 4888 9467 4878 9468
      4873 9458 4872 9454 4870 9450 4870 9443
      4869 9442 4853 9442
TIME...MOT...LOC 2035Z 302DEG 28KT 4878 9478

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

JK

412 
WWUS53 KFGF 112102
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
402 PM CDT WED SEP 11 2013

MNC077-112115-
/O.CON.KFGF.TO.W.0017.000000T0000Z-130911T2115Z/
LAKE OF THE WOODS MN-
402 PM CDT WED SEP 11 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL LAKE OF THE
WOODS COUNTY UNTIL 415 PM CDT...

AT 400 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR BAUDETTE...AND MOVING SOUTHEAST AT 30 MPH.

HAZARD...TORNADO.

SOURCE...WEATHER SPOTTERS REPORTED ROTATION.

IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
         ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
         BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
LAKE OF THE WOODS COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND
FORKS.

&&

LAT...LON 4870 9478 4877 9471 4878 9468 4873 9458
      4872 9454 4870 9450 4870 9443 4869 9442
      4853 9442
TIME...MOT...LOC 2102Z 302DEG 28KT 4865 9453

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JK

598 
WWUS53 KFGF 112116
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
416 PM CDT WED SEP 11 2013

MNC077-112125-
/O.EXP.KFGF.TO.W.0017.000000T0000Z-130911T2115Z/
LAKE OF THE WOODS MN-
416 PM CDT WED SEP 11 2013

...THE TORNADO WARNING FOR EAST CENTRAL LAKE OF THE WOODS COUNTY HAS
EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.  HOWEVER...HAIL IS STILL POSSIBLE SOUTH OF THIS AREA WITH A  
THUNDERSTORM JUST EAST OF CARP.

LAT...LON 4870 9478 4877 9471 4878 9468 4873 9458
      4872 9454 4870 9450 4870 9443 4869 9442
      4853 9442
TIME...MOT...LOC 2115Z 302DEG 28KT 4859 9440

$$

JK/BB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 2:54 PM CDT	Special Weather Statement	FGF	Lake of the Woods	51 min
Sep 11, 3:04 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods	56 min
Sep 11, 3:50 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods	40 min

Nearby

Tornado Warnings in Minnesota, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.