Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 25, NWS Grand Forks, ND

June 10, 20124 counties in Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 10, 2012, 8:34 AM CDT for 4 counties in Minnesota. It was in force for 41 min. 1 report 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: Jun 10, 2012, 8:34 AM CDT (13:34 UTC)
Expired: Jun 10, 2012, 9:15 AM CDT
In force: 41 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Clay County, MN, Mahnomen County, MN, Norman County, MN, Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 93 km from the middle of the area, began a volume at 13:38 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
Jun 10, 9:00 AM CDT	HAIL 1	1 Se Twin Valley, MN	HAIL RANGED FROM PEAS TO QUARTERS IN SIZE.

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

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 1.6 hours before the alert went out and 260 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: 59 J/kg
Mixed-layer CIN: -530 J/kg
Mixed-layer LCL: 1794 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 202 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.

820 
WUUS53 KFGF 101334
SVRFGF
MNC027-087-107-119-101415-
/O.NEW.KFGF.SV.W.0025.120610T1334Z-120610T1415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
834 AM CDT SUN JUN 10 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CLAY COUNTY IN NORTHWEST MINNESOTA...
  NORTHWESTERN MAHNOMEN COUNTY IN NORTHWEST MINNESOTA...
  EASTERN NORMAN COUNTY IN NORTHWEST MINNESOTA...
  EXTREME SOUTH CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 915 AM CDT

* AT 833 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE
  STORM WAS LOCATED 4 MILES SOUTHEAST OF BORUP...OR 26 MILES
  NORTHEAST OF FARGO...MOVING TO THE NORTHEAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ADA AND SYRE AROUND 840 AM CDT.
  TWIN VALLEY AND FLOM AROUND 845 AM CDT.
  GARY AND FAITH AROUND 855 AM CDT.
  MAHNOMEN...WAUKON AND FLAMING AROUND 900 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE FERTILE AND BEJOU.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4737 9575 4715 9613 4715 9619 4711 9620
      4701 9636 4715 9662 4758 9632
TIME...MOT...LOC 1334Z 219DEG 43KT 4716 9643
WIND...HAIL <50MPH 1.00IN

$$
SPEICHER

2 follow-up statements

253 
WWUS53 KFGF 101400
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
900 AM CDT SUN JUN 10 2012

MNC027-119-101410-
/O.CAN.KFGF.SV.W.0025.000000T0000Z-120610T1415Z/
CLAY MN-POLK MN-
900 AM CDT SUN JUN 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTH CENTRAL POLK AND
NORTHEASTERN CLAY COUNTIES IN NORTHWEST MINNESOTA IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4715 9631 4717 9648 4749 9626 4737 9575
      4715 9613
TIME...MOT...LOC 1400Z 219DEG 43KT 4740 9614

$$

MNC087-107-101415-
/O.CON.KFGF.SV.W.0025.000000T0000Z-120610T1415Z/
MAHNOMEN MN-NORMAN MN-
900 AM CDT SUN JUN 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN NORMAN
AND WEST CENTRAL MAHNOMEN COUNTIES IN NORTHWEST MINNESOTA UNTIL 915
AM CDT...

AT 856 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THE
STORM WAS LOCATED 2 MILES WEST OF WAUKON...OR 41 MILES NORTHWEST OF 
DETROIT LAKES...MOVING TO THE NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RANUM AROUND 905 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4715 9631 4717 9648 4749 9626 4737 9575
      4715 9613
TIME...MOT...LOC 1400Z 219DEG 43KT 4740 9614

$$
SPEICHER

539 
WWUS53 KFGF 101412
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
912 AM CDT SUN JUN 10 2012

MNC087-107-101422-
/O.EXP.KFGF.SV.W.0025.000000T0000Z-120610T1415Z/
MAHNOMEN MN-NORMAN MN-
912 AM CDT SUN JUN 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN NORMAN AND WEST
CENTRAL MAHNOMEN COUNTIES IN NORTHWEST MINNESOTA WILL EXPIRE AT 915
AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4715 9631 4717 9648 4749 9626 4737 9575
      4715 9613
TIME...MOT...LOC 1412Z 219DEG 43KT 4751 9600

$$
SPEICHER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 9:15 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	30 min
Jun 9, 11:50 PM CDT	Special Weather Statement	FGF		55 min
Jun 10, 6:40 AM CDT	Severe Thunderstorm Warning	FGF	Roseau	50 min
Jun 10, 6:46 AM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Lake of the Woods, Marshall, Roseau	59 min
Jun 10, 7:36 AM CDT	Special Weather Statement	FGF	Lake of the Woods	24 min
Jun 10, 8:08 AM CDT	Special Weather Statement	FGF	Mahnomen	52 min
Jun 10, 9:30 AM CDT	Special Weather Statement	FGF	Mahnomen	30 min
Jun 10, 3:23 PM CDT	Special Weather Statement	FGF	Wadena	67 min
Jun 10, 3:49 PM CDT	Severe Thunderstorm Warning	FGF	Wadena	26 min
Jun 10, 4:09 PM CDT	Special Weather Statement	FGF	Hubbard	66 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.