Alert archive / Minnesota / Tornado Warnings in 2014

Tornado Warning 23, NWS Grand Forks, ND

September 4, 2014Otter Tail County, Wadena County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Sep 4, 2014, 5:06 AM CDT for Otter Tail County, Wadena County, Minnesota. It was in force for 39 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: Sep 4, 2014, 5:06 AM CDT (10:06 UTC)
Expired: Sep 4, 2014, 5:45 AM CDT
In force: 39 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Otter Tail County, MN, Wadena County, MN

The radar

The Minneapolis radar (KMPX), 206 km from the middle of the area, began a volume at 10:06 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 4, 5:42 AM CDT	TORNADO 1	2 Ssw New York Mills, MN	A TORNADO WRAPPED IN DOWNBURST WINDS AND HEAVY RAIN TRACKED INTERMITTENTLY FOR ABOUT 2 MILES ACROSS EASTCENTRAL NEWTON TOWNSHIP...TO ABOUT 1SE OF NEW YORK MILLS BY 545 AM CDT. THE TORNADO KNOCKED DOWN NUMEROUS TREES OR LARGE TREE BRANCHES ALONG ITS ROUTE...BRO

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
Sep 4, 1:48 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.1 hours before the alert went out and 204 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: 2049 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 243 m²/s²
0-3 km storm-relative helicity: 337 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 14.3

Open this sounding in Storm Lab

The text

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

673 
WFUS53 KFGF 041006
TORFGF
MNC111-159-041045-
/O.NEW.KFGF.TO.W.0023.140904T1006Z-140904T1045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
506 AM CDT THU SEP 4 2014

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...
  SOUTHERN WADENA COUNTY IN CENTRAL MINNESOTA...

* UNTIL 545 AM CDT

* AT 504 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR NEW YORK MILLS...AND MOVING EAST AT 45
  MPH.

  HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

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

* THIS DANGEROUS STORM WILL BE NEAR...
  WADENA AROUND 515 AM CDT.
  BLUE GRASS AND VERNDALE AROUND 525 AM CDT.
  OYLEN AROUND 535 AM 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 4637 9479 4641 9541 4659 9540 4660 9477
      4640 9477 4639 9473 4637 9473
TIME...MOT...LOC 1006Z 272DEG 38KT 4650 9528

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

JR

1 follow-up statement

982 
WWUS53 KFGF 041037
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
537 AM CDT THU SEP 4 2014

MNC111-159-041047-
/O.EXP.KFGF.TO.W.0023.000000T0000Z-140904T1045Z/
WADENA MN-OTTER TAIL MN-
537 AM CDT THU SEP 4 2014

...THE TORNADO WARNING FOR EAST CENTRAL OTTER TAIL AND SOUTHERN 
WADENA COUNTIES WILL EXPIRE AT 545 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.  HOWEVER...SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH
THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 7 AM CDT. 

LAT...LON 4637 9479 4641 9541 4659 9540 4660 9477
      4640 9477 4639 9473 4637 9473
TIME...MOT...LOC 1037Z 272DEG 38KT 4649 9480

$$

JR

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 2:36 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Wilkin	54 min
Sep 4, 3:25 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail, Wilkin	65 min
Sep 4, 3:55 AM CDT	Flash Flood Warning	FGF	Clay, Wilkin	8 hr
Sep 4, 4:02 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Otter Tail, Wilkin	58 min
Sep 4, 4:31 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	59 min
Sep 4, 4:46 AM CDT	Tornado Warning	FGF	Otter Tail, Wilkin	44 min
Sep 4, 4:58 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail, Wilkin	62 min
Sep 4, 4:59 AM CDT	Flash Flood Warning	FGF	Becker, Clay, Otter Tail, Wilkin	7 hr
Sep 4, 5:32 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	58 min
Sep 4, 5:51 AM CDT	Tornado Warning	FGF	Otter Tail, Wadena	39 min
Sep 4, 6:03 AM CDT	Areal Flood Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	10 hr
Sep 4, 1:19 PM CDT	River Flood Watch	FGF	Clay	4 days

Nearby

Tornado Warnings in Minnesota, 2014 Every tornado warning in 2014 Tornadoes in 2014

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.