Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 96, NWS Grand Forks, ND

July 25, 20124 counties in Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 25, 2012, 12:28 AM CDT for 4 counties in Minnesota. It was in force for 62 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 25, 2012, 12:28 AM CDT (05:28 UTC)
Expired: Jul 25, 2012, 1:30 AM CDT
In force: 62 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 0.88 in
Wind: 70.0 mph

Counties Becker County, MN, Clay County, MN, Otter Tail County, MN, Wilkin County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 153 km from the middle of the area, began a volume at 05:29 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 25, 12:32 AM CDT	TSTM WND GST 53	2 Nnw Rothsay, MN	STRONG THUNDERSTORM WINDS GUSTED ABOVE 50 MPH FOR SEVERAL MINUTES. MEASURED AT THE MNDOT RWIS SITE ALONG INTERSTATE 94 NEAR ROTHSAY.
Jul 25, 1:15 AM CDT	TSTM WND DMG	1 N Wolf Lake, MN	SEVERAL LARGE TREE LIMBS BROKEN DOWN ALONG EAST END OF WOLF LAKE. TIME ESTIMATE BASED ON RADAR.

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 24, 9:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.5 hours before the alert went out and 261 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: 1518 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 392 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 17.7

Open this sounding in Storm Lab

The text

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

017 
WUUS53 KFGF 250528
SVRFGF
MNC005-027-111-167-250630-
/O.NEW.KFGF.SV.W.0096.120725T0528Z-120725T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1228 AM CDT WED JUL 25 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BECKER COUNTY IN NORTHWEST MINNESOTA...
  SOUTHEASTERN CLAY COUNTY IN NORTHWEST MINNESOTA...
  OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...
  NORTHERN WILKIN COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 130 AM CDT

* AT 1224 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 70 MPH. THE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 2 MILES SOUTH OF CALLAWAY TO 7 MILES SOUTH OF ROLLAG TO 4
  MILES EAST OF KENT...MOVING TO THE EAST AT 40 MPH. ALSO NICKEL SIZE
  HAIL MAY ACCOMPANY THE DAMAGING WINDS.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  DUNVILLA AROUND 1235 AM CDT.
  DETROIT LAKES...PELICAN RAPIDS AND SHOREHAM AROUND 1240 AM CDT.
  ROCHERT AND LAKE LIDA AROUND 1245 AM CDT.
  VERGAS...HEIGHT OF LAND LAKE AND ERHARD AROUND 1250 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORMS
INCLUDE ROTHSAY...FRAZEE...TOAD LAKE...FERGUS FALLS...PERHAM AND
RICHVILLE.

FOR MOTORISTS ON INTERSTATE 94...SEVERE THUNDERSTORMS WILL BE BETWEEN
MINNESOTA MILE MARKER 34 AND MINNESOTA MILE MARKER 59...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4688 9518 4648 9533 4614 9571 4640 9665
      4672 9632 4699 9604
TIME...MOT...LOC 0528Z 279DEG 34KT 4695 9587 4663 9616
          4642 9655
WIND...HAIL 70MPH 0.88IN

$$

DK

1 follow-up statement

134 
WWUS53 KFGF 250557
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1257 AM CDT WED JUL 25 2012

MNC005-027-111-167-250630-
/O.CON.KFGF.SV.W.0096.000000T0000Z-120725T0630Z/
CLAY MN-OTTER TAIL MN-BECKER MN-WILKIN MN-
1257 AM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
BECKER AND SOUTHEASTERN CLAY COUNTIES IN NORTHWEST MINNESOTA...AND
NORTHERN WILKIN AND OTTER TAIL COUNTIES IN WEST CENTRAL MINNESOTA
UNTIL 130 AM CDT...

AT 1252 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 70 MPH.  THE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM NEAR HEIGHT OF LAND LAKE TO 3 MILES WEST OF BIG MCDONALD LAKE TO
3 MILES NORTHEAST OF FERGUS FALLS...MOVING TO THE EAST AT 40 MPH.
NICKEL SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

SEVERE THUNDERSTORMS WILL BE NEAR...
  UNDERWOOD...SNELLMAN AND PHELPS AROUND 105 AM CDT.
  PERHAM...RICHVILLE AND EVERGREEN AROUND 110 AM CDT.
  BATTLE LAKE...WOLF LAKE AND OTTERTAIL LAKE AROUND 115 AM CDT.
  OTTERTAIL...MIDWAY AND CLITHERALL AROUND 120 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS
INCLUDE AMOR...BUTLER...NEW YORK MILLS AND HILLVIEW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4688 9518 4648 9533 4614 9571 4640 9665
      4672 9632 4699 9604
TIME...MOT...LOC 0557Z 279DEG 34KT 4688 9555 4656 9575
          4631 9597
WIND...HAIL 70MPH 0.88IN

$$

DK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 10:01 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Wilkin	59 min
Jul 24, 10:59 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Wilkin	61 min
Jul 24, 11:28 PM CDT	Severe Thunderstorm Warning	FGF	Polk	62 min
Jul 25, 12:01 AM CDT	Areal Flood Advisory	FGF	Clay, Wilkin	10 hr
Jul 25, 12:20 AM CDT	Areal Flood Advisory	FGF	Polk	3 hr
Jul 25, 1:08 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	67 min
Jul 25, 3:18 AM CDT	Areal Flood Advisory	FGF	Becker, Clay, Hubbard, Otter Tail, Wadena, Wilkin	7 hr
Jul 25, 5:42 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	63 min
Jul 25, 6:02 PM CDT	Special Weather Statement	FGF	Becker, Clearwater, Hubbard, Mahnomen, Otter Tail, Wadena and 1 more	58 min
Jul 25, 6:13 PM CDT	Special Weather Statement	FGF	Lake of the Woods	62 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012 Every severe thunderstorm warning in 2012

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.