Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 121, NWS Grand Forks, ND

August 15, 20124 counties in Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 15, 2012, 5:06 PM CDT for 4 counties in Minnesota. It was in force for 34 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: Aug 15, 2012, 5:06 PM CDT (22:06 UTC)
Expired: Aug 15, 2012, 5:40 PM CDT
In force: 34 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Becker County, MN, Beltrami County, MN, Clearwater County, MN, Hubbard County, MN

What was reported inside it

Time	Report	Where	Remark
Aug 15, 5:08 PM CDT	HAIL 0.75	1 Sw Hines, MN	TIME ESTIMATED FROM RADAR.
Aug 15, 5:10 PM CDT	HAIL 1.75	Hines, MN	FEW HAILSTONES TO GOLF BALL SIZE...WITH MORE QUARTER TO HALF DOLLAR SIZED HAIL.

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
Aug 15, 3:25 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 10.1 hours before the alert went out and 167 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1155 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 61 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.

119 
WUUS53 KFGF 152206
SVRFGF
MNC005-007-029-057-152300-
/O.NEW.KFGF.SV.W.0121.120815T2206Z-120815T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
506 PM CDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BECKER COUNTY IN NORTHWEST MINNESOTA...
  SOUTHEASTERN BELTRAMI COUNTY IN NORTH CENTRAL MINNESOTA...
  SOUTHEASTERN CLEARWATER COUNTY IN NORTHWEST MINNESOTA...
  NORTHERN HUBBARD COUNTY IN NORTH CENTRAL MINNESOTA...

* UNTIL 600 PM CDT

* AT 501 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 4 MILES WEST OF TURTLE RIVER TO
  4 MILES SOUTHWEST OF LAKE GEORGE...MOVING TO THE EAST AT 45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GUTHRIE AROUND 510 PM CDT.
  LAPORTE AND HINES AROUND 515 PM CDT.
  BLACKDUCK AROUND 520 PM CDT.
  PENNINGTON AND BENEDICT AROUND 525 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4740 9466 4707 9466 4707 9533 4775 9500
      4776 9441 4741 9441
TIME...MOT...LOC 2206Z 270DEG 38KT 4760 9477 4715 9496
WIND...HAIL 60MPH 1.00IN

$$

HOPKINS

2 follow-up statements

270 
WWUS53 KFGF 152221
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
521 PM CDT WED AUG 15 2012

MNC005-029-152231-
/O.CAN.KFGF.SV.W.0121.000000T0000Z-120815T2300Z/
BECKER MN-CLEARWATER MN-
521 PM CDT WED AUG 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLEARWATER AND
NORTHEASTERN BECKER COUNTIES IN NORTHWEST MINNESOTA IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4740 9466 4707 9466 4707 9513 4775 9478
      4776 9441 4741 9441
TIME...MOT...LOC 2221Z 270DEG 38KT 4767 9457 4722 9477

$$

MNC007-057-152300-
/O.CON.KFGF.SV.W.0121.000000T0000Z-120815T2300Z/
HUBBARD MN-BELTRAMI MN-
521 PM CDT WED AUG 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BELTRAMI AND NORTHERN HUBBARD COUNTIES IN NORTH CENTRAL MINNESOTA
UNTIL 600 PM CDT...

AT 519 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM NEAR HINES TO 2 MILES WEST OF
LAPORTE...MOVING TO THE EAST AT 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  PENNINGTON AROUND 530 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4740 9466 4707 9466 4707 9513 4775 9478
      4776 9441 4741 9441
TIME...MOT...LOC 2221Z 270DEG 38KT 4767 9457 4722 9477
WIND...HAIL 60MPH 1.00IN

$$

HOPKINS

823 
WWUS53 KFGF 152240
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
540 PM CDT WED AUG 15 2012

MNC007-057-152250-
/O.CAN.KFGF.SV.W.0121.000000T0000Z-120815T2300Z/
HUBBARD MN-BELTRAMI MN-
540 PM CDT WED AUG 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BELTRAMI AND
NORTHERN HUBBARD COUNTIES IN NORTH CENTRAL MINNESOTA IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND MOVED
OUT OF THE WARNED AREA. HOWEVER SMALL HAIL IS STILL POSSIBLE WITH 
THESE THUNDERSTORMS.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT.

LAT...LON 4740 9466 4707 9466 4707 9513 4775 9478
      4776 9441 4741 9441
TIME...MOT...LOC 2240Z 270DEG 38KT 4767 9427 4722 9448

$$

HOPKINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 4:05 PM CDT	Severe Thunderstorm Warning	FGF	Wilkin	55 min
Aug 15, 4:12 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Hubbard	63 min
Aug 15, 4:42 PM CDT	Special Weather Statement	FGF	Grant, Otter Tail	63 min
Aug 15, 5:12 PM CDT	Special Weather Statement	FGF	Grant	63 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.