Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 65, NWS Grand Forks, ND

July 15, 2011Richland County, North Dakota; Otter Tail County, Wilkin County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 15, 2011, 4:50 AM CDT for Richland County, North Dakota; Otter Tail County, Wilkin County, Minnesota. It was in force for 55 min. 2 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: Jul 15, 2011, 4:50 AM CDT (09:50 UTC)
Expired: Jul 15, 2011, 5:45 AM CDT
In force: 55 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 70.0 mph

Counties Otter Tail County, MN, Wilkin County, MN, Richland County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 141 km from the middle of the area, began a volume at 09:50 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 15, 5:20 AM CDT	TSTM WND DMG	1 N Wahpeton, ND	NUMEROUS LARGE TREE BRANCHES AND LIMBS WERE BROKEN DOWN BY WINDS. SPORADIC POWER OUTAGES WERE ALSO OBSERVED.
Jul 15, 5:25 AM CDT	FUNNEL CLOUD	2 S Wahpeton, ND	WALL CLOUD WITH FUNNEL REPORTED TO LAW ENFORCEMENT.

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 15, 2:56 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 9.8 hours before the alert went out and 202 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: 4277 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 4.1
Supercell composite: 19.7

Open this sounding in Storm Lab

The text

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

733 
WUUS53 KFGF 150950
SVRFGF
MNC111-167-NDC077-151045-
/O.NEW.KFGF.SV.W.0065.110715T0950Z-110715T1045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
450 AM CDT FRI JUL 15 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME SOUTHWESTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...
  WILKIN COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 545 AM CDT

* AT 446 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 70 MPH. THE STORM WAS
  LOCATED 4 MILES EAST OF GALCHUTT...OR 9 MILES NORTHWEST OF
  WAHPETON...MOVING TO THE EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRECKENRIDGE AROUND 455 AM CDT.
  DORAN AROUND 500 AM CDT.
  EVERDELL AROUND 505 AM CDT.
  LAWNDALE AND FOXHOME AROUND 510 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE ROTHSAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

&&

LAT...LON 4612 9708 4663 9718 4663 9628 4610 9626
TIME...MOT...LOC 0948Z 265DEG 41KT 4637 9670
WIND...HAIL 70MPH 1.50IN

$$

GUST

1 follow-up statement

046 
WWUS53 KFGF 151022
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
522 AM CDT FRI JUL 15 2011

MNC111-167-NDC077-151045-
/O.CON.KFGF.SV.W.0065.000000T0000Z-110715T1045Z/
RICHLAND ND-WILKIN MN-OTTER TAIL MN-
522 AM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EXTREME
SOUTHWESTERN OTTER TAIL AND WILKIN COUNTIES IN WEST CENTRAL
MINNESOTA...AND NORTHERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA
UNTIL 545 AM CDT...

AT 519 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 70 MPH.  THE STORM WAS LOCATED 2 MILES
NORTH OF CARLISLE...OR 10 MILES NORTHWEST OF FERGUS FALLS...MOVING TO
THE EAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF EXTREME
SOUTHWESTERN OTTER TAIL...NORTHERN RICHLAND AND WILKIN COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

&&

LAT...LON 4612 9708 4663 9718 4663 9628 4610 9626
TIME...MOT...LOC 1022Z 265DEG 41KT 4640 9614

$$

GUST

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 2:11 AM CDT	Severe Thunderstorm Warning	FGF	Griggs	64 min
Jul 15, 2:41 AM CDT	Severe Thunderstorm Warning	FGF	Barnes	64 min
Jul 15, 3:25 AM CDT	Tornado Warning	FGF	Barnes	50 min
Jul 15, 3:53 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland	52 min
Jul 15, 4:03 AM CDT	Excessive Heat Watch	FGF	Barnes, Benson, Cass, Eddy, Grand Forks, Griggs and 9 more	24 hr
Jul 15, 4:04 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	56 min
Jul 15, 4:18 AM CDT	Tornado Warning	FGF	Ransom, Richland	42 min
Jul 15, 5:00 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	43 min
Jul 15, 5:11 AM CDT	Areal Flood Advisory	FGF	Barnes	9 hr
Jul 15, 5:12 AM CDT	Tornado Warning	FGF	Richland	39 min
Jul 15, 5:47 AM CDT	Severe Thunderstorm Warning	FGF	Richland	58 min
Jul 15, 3:15 PM CDT	Excessive Heat Warning	FGF	Barnes, Cass, Eddy, Grand Forks, Griggs, Nelson and 5 more	5 days
Jul 15, 6:48 AM CDT	Severe Thunderstorm Warning	FGF	Grant	42 min
Jul 15, 6:59 AM CDT	Areal Flood Advisory	FGF	Grant, Otter Tail, Wilkin	8 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Severe Thunderstorm Warnings in North Dakota, 2011 Every severe thunderstorm warning 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.