Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 75, NWS Grand Forks, ND

July 12, 2012Becker County, Clay County, Otter Tail County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 12, 2012, 7:47 PM CDT for Becker County, Clay County, Otter Tail County, Minnesota. It was in force for 58 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: Jul 12, 2012, 7:47 PM CDT (00:47 UTC)
Expired: Jul 12, 2012, 8:45 PM CDT
In force: 58 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Fargo/Grand Forks radar (KMVX), 128 km from the middle of the area, began a volume at 00:49 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 12, 8:15 PM CDT	HAIL 1.5	6 Ne Barnesville, MN	LAREG HAIL FELL FOR ABOUT 4 MINUTES ...UNTIL ABOUT 719 PM CDT.
Jul 12, 8:25 PM CDT	HAIL 1.75	5 Ne Barnesville, MN	HAIL FELL BETWEEN 815PM AND 825PM RANGING FROM DIME TO GOLFBALL
Jul 12, 8:54 PM CDT	HAIL 0.75	11 E Barnesville, MN	MAINLY HALF INCH HAIL WITH A FEW TO PENNY SIZE. HAUIL LASTED FOR ABOUT 5 MINUTES.

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

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.8 hours before the alert went out and 255 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: 821 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 2251 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

170 
WUUS53 KFGF 130047
SVRFGF
MNC005-027-111-130145-
/O.NEW.KFGF.SV.W.0075.120713T0047Z-120713T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
747 PM CDT THU JUL 12 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BECKER COUNTY IN NORTHWEST MINNESOTA...
  SOUTHEASTERN CLAY COUNTY IN NORTHWEST MINNESOTA...
  NORTHWESTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 845 PM CDT

* AT 745 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 3 MILES
  NORTHWEST OF BARNESVILLE...OR 21 MILES SOUTHEAST OF FARGO...MOVING
  TO THE EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BARNESVILLE AROUND 755 PM CDT.
  ROLLAG AROUND 815 PM CDT.
  PELICAN RAPIDS AND CORMORANT AROUND 840 PM CDT.
  MAPLEWOOD STATE PARK...LAKE LIDA AND DUNVILLA AROUND 845 PM CDT.

FOR MOTORISTS ON INTERSTATE 94...THE SEVERE THUNDERSTORM WILL BE
BETWEEN...MILE MARKER 19 AROUND 745 PM CDT...AND MILE MARKER 27
AROUND 800 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4659 9628 4663 9629 4663 9630 4663 9643
      4666 9657 4679 9653 4675 9580 4648 9587
TIME...MOT...LOC 0047Z 280DEG 18KT 4669 9645
WIND...HAIL 60MPH 1.00IN

$$

BRAMER

2 follow-up statements

714 
WWUS53 KFGF 130108
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
808 PM CDT THU JUL 12 2012

MNC005-027-111-130145-
/O.CON.KFGF.SV.W.0075.000000T0000Z-120713T0145Z/
CLAY MN-OTTER TAIL MN-BECKER MN-
808 PM CDT THU JUL 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
BECKER AND SOUTHEASTERN CLAY COUNTIES IN NORTHWEST MINNESOTA...AND
NORTHWESTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA UNTIL 845 PM
CDT...

AT 803 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THE STORM WAS LOCATED 4 MILES
NORTHEAST OF BARNESVILLE...OR 25 MILES SOUTHWEST OF DETROIT LAKES...
MOVING TO THE EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROLLAG AROUND 815 PM CDT.
  CORMORANT AROUND 835 PM CDT.
  PELICAN RAPIDS AROUND 840 PM CDT.
  SHOREHAM...MAPLEWOOD STATE PARK AND LAKE LIDA AROUND 845 PM CDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4659 9628 4663 9629 4663 9643 4665 9647
      4679 9644 4675 9580 4648 9587
TIME...MOT...LOC 0109Z 280DEG 18KT 4667 9629
WIND...HAIL 60MPH 1.00IN

$$

BRAMER

907 
WWUS53 KFGF 130132
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
832 PM CDT THU JUL 12 2012

MNC005-027-111-130145-
/O.CON.KFGF.SV.W.0075.000000T0000Z-120713T0145Z/
CLAY MN-OTTER TAIL MN-BECKER MN-
832 PM CDT THU JUL 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
BECKER AND SOUTHEASTERN CLAY COUNTIES IN NORTHWEST MINNESOTA...AND
NORTHWESTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA UNTIL 845 PM
CDT...

AT 827 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THE STORM WAS LOCATED 7
MILES NORTHWEST OF PELICAN RAPIDS...OR 19 MILES SOUTHWEST OF DETROIT
LAKES...MOVING TO THE EAST AT 20 MPH.

IN ADDITION...AT 815 PM CDT PING PONG BALL SIZED HAIL WAS REPORTED 6 
MILES NORTHEAST OF BARNESVILLE WITH THIS STORM.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  PELICAN RAPIDS AROUND 840 PM CDT.
  SHOREHAM...MAPLEWOOD STATE PARK AND LAKE LIDA AROUND 845 PM CDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4659 9628 4663 9629 4663 9639 4678 9632
      4677 9601 4675 9580 4648 9587
TIME...MOT...LOC 0131Z 280DEG 18KT 4665 9613
WIND...HAIL 60MPH 1.50IN

$$

BRAMER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 7:08 PM CDT	Special Weather Statement	FGF	Norman	67 min
Jul 12, 7:43 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay	45 min
Jul 12, 8:16 PM CDT	Severe Thunderstorm Warning	FGF	Grant	59 min
Jul 12, 8:46 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	59 min
Jul 13, 9:57 AM CDT	Areal Flood Advisory	FGF	Lake of the Woods	5 hr
Jul 13, 4:48 PM CDT	Special Weather Statement	FGF	Clearwater	57 min
Jul 13, 4:59 PM CDT	Special Weather Statement	FGF	Hubbard	61 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.