Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 151, NWS Grand Forks, ND

August 12, 2011Beltrami County, Lake of the Woods County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 12, 2011, 1:19 PM CDT for Beltrami County, Lake of the Woods County, Minnesota. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 12, 2011, 1:19 PM CDT (18:19 UTC)
Expired: Aug 12, 2011, 2:15 PM CDT
In force: 56 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Beltrami County, MN, Lake of the Woods County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 195 km from the middle of the area, began a volume at 18:22 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.

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 6.3 hours before the alert went out and 140 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: 270 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 882 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 12 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.

497 
WUUS53 KFGF 121819
SVRFGF
MNC007-077-121915-
/O.NEW.KFGF.SV.W.0151.110812T1819Z-110812T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
119 PM CDT FRI AUG 12 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BELTRAMI COUNTY IN NORTH CENTRAL MINNESOTA...
  WEST CENTRAL LAKE OF THE WOODS COUNTY IN NORTH CENTRAL MINNESOTA...

* UNTIL 215 PM CDT

* AT 118 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 6 MILES
  WEST OF FAUNCE...OR 36 MILES SOUTHEAST OF ROSEAU...MOVING TO THE
  SOUTHWEST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
  NORTHWESTERN BELTRAMI AND WEST CENTRAL LAKE OF THE WOODS COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4840 9523 4854 9535 4863 9534 4863 9533
      4872 9502 4856 9489
TIME...MOT...LOC 1819Z 060DEG 7KT 4859 9508
WIND...HAIL 60MPH 1.00IN

$$

ROGERS

1 follow-up statement

180 
WWUS53 KFGF 121908
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
208 PM CDT FRI AUG 12 2011

MNC007-077-121919-
/O.EXP.KFGF.SV.W.0151.000000T0000Z-110812T1915Z/
LAKE OF THE WOODS MN-BELTRAMI MN-
208 PM CDT FRI AUG 12 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BELTRAMI AND WEST
CENTRAL LAKE OF THE WOODS COUNTIES IN NORTH CENTRAL MINNESOTA WILL
EXPIRE AT 215 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 4840 9523 4854 9535 4863 9534 4863 9533
      4872 9502 4856 9489
TIME...MOT...LOC 1909Z 060DEG 7KT 4854 9521

$$

GROCHOCINSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 5:28 PM CDT	Severe Thunderstorm Warning	FGF	Norman	47 min
Aug 12, 5:57 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	38 min
Aug 12, 6:19 PM CDT	Areal Flood Advisory	FGF	Clay	6 hr
Aug 12, 6:43 PM CDT	Areal Flood Advisory	FGF	Becker	5 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.