Alert archive / Minnesota / Tornado Warnings in 2014

Tornado Warning 13, NWS Grand Forks, ND

June 20, 2014Otter Tail County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jun 20, 2014, 5:10 PM CDT for Otter Tail County, Minnesota. It was in force for 50 min. 8 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: Jun 20, 2014, 5:10 PM CDT (22:10 UTC)
Expired: Jun 20, 2014, 6:00 PM CDT
In force: 50 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Otter Tail County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 186 km from the middle of the area, began a volume at 22:13 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
Jun 20, 5:10 PM CDT	TORNADO 0	3 Wsw Ottertail, MN	A PERSISTENT FUNNEL CLOUD AND INTERNMITTENT WATERSPOUT WAS SEEN OVER NORTHEAST OTTER TAIL LAKE. THE WATERSPOUT WAS EVIDENT FOR ABOUT A MINUTE.
Jun 20, 5:15 PM CDT	HAIL 1	Ottertail, MN	LOTS OF DIME TO QUARTER SIZED HAIL.
Jun 20, 5:18 PM CDT	HAIL 1.5	2 E Ottertail, MN	A COUPLE MINUTES OF VERY LARGE HAIL WITH SEVERAL MINUTES OF TORRENTIAL RAINS.
Jun 20, 5:23 PM CDT	FUNNEL CLOUD	4 N Henning, MN	ROTATION VIEWED FROM ABOUT 1N OF HENNING... WITH FUNNEL APPROXIMATED NEAR CR132... MOVING EAST.
Jun 20, 5:26 PM CDT	FUNNEL CLOUD	4 N Henning, MN	ROTATION VIEWED FROM ABOUT 1N OF HENNING... WITH FUNNEL APPROXIMATED NEAR CR132... MOVING EAST.
Jun 20, 5:30 PM CDT	TSTM WND GST 63	2 N Deer Creek, MN	MEASURED BY MOBILE WEATHER STATION
Jun 20, 5:30 PM CDT	HAIL 1	2 N Deer Creek, MN
Jun 20, 5:43 PM CDT	HAIL 1	1 W Deer Creek, MN

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
Jun 20, 3:18 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.2 hours before the alert went out and 228 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: 301 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 689 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 65 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.

209 
WFUS53 KFGF 202210
TORFGF
MNC111-202300-
/O.NEW.KFGF.TO.W.0013.140620T2210Z-140620T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
510 PM CDT FRI JUN 20 2014

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

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

* UNTIL 600 PM CDT

* AT 505 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR OTTERTAIL LAKE...AND MOVING EAST AT 25
  MPH.

  AT 505 PM...LOCAL LAW ENFORCEMENT REPORTED A FUNNEL CLOUD 4 MILES 
  WEST OF OTTERTAIL.

  HAZARD...TORNADO.

  SOURCE...RADAR INDICATED ROTATION.

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

* THIS DANGEROUS STORM WILL BE NEAR...
  OTTERTAIL AROUND 520 PM CDT.
  HENNING AROUND 540 PM CDT.
  DEER CREEK AND ALMORA AROUND 550 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 4650 9530 4619 9530 4631 9580 4653 9581
TIME...MOT...LOC 2210Z 287DEG 20KT 4641 9565

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

$$

HOPKINS

2 follow-up statements

678 
WWUS53 KFGF 202227
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
527 PM CDT FRI JUN 20 2014

MNC111-202300-
/O.CON.KFGF.TO.W.0013.000000T0000Z-140620T2300Z/
OTTER TAIL MN-
527 PM CDT FRI JUN 20 2014

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL OTTER TAIL COUNTY
UNTIL 600 PM CDT...

AT 522 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED NEAR OTTERTAIL...AND MOVING EAST AT 25 MPH.

HAZARD...TORNADO.

SOURCE...RADAR INDICATED ROTATION.

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

THE DANGEROUS STORM WILL BE NEAR...
  HENNING AROUND 540 PM CDT.
  DEER CREEK AND ALMORA AROUND 550 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 4652 9565 4650 9530 4619 9530 4627 9564
TIME...MOT...LOC 2227Z 287DEG 20KT 4638 9552

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

$$

HOPKINS

581 
WWUS53 KFGF 202242
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
542 PM CDT FRI JUN 20 2014

MNC111-202252-
/O.CAN.KFGF.TO.W.0013.000000T0000Z-140620T2300Z/
OTTER TAIL MN-
542 PM CDT FRI JUN 20 2014

...THE TORNADO WARNING FOR CENTRAL OTTER TAIL COUNTY IS CANCELLED...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN 
EFFECT FOR THE AREA. 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 900 PM CDT.

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

LAT...LON 4652 9565 4650 9530 4619 9530 4627 9564
TIME...MOT...LOC 2242Z 287DEG 20KT 4635 9540

$$

HOPKINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 3:18 PM CDT	Tornado Warning	FGF	Clay, Wilkin	42 min
Jun 20, 3:50 PM CDT	Tornado Warning	FGF	Clay, Otter Tail, Wilkin	40 min
Jun 20, 4:27 PM CDT	Tornado Warning	FGF	Otter Tail	48 min
Jun 20, 4:50 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	55 min
Jun 20, 5:40 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail, Wadena	65 min

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.