Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 15, NWS Grand Forks, ND

June 7, 2012Norman County, Polk County, Minnesota; Traill County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 7, 2012, 6:19 PM CDT for Norman County, Polk County, Minnesota; Traill County, North Dakota. It was in force for 56 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
Jun 7, 2012, 6:19 PM CDT (23:19 UTC)
Expired
Jun 7, 2012, 7:15 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 Norman County, MN, Polk County, MN, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 44 km from the middle of the area, began a volume at 23:22 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.

What was reported inside it

TimeReportWhereRemark
Jun 7, 6:30 PM CDTTSTM WND DMG1 Nnw Hendrum, MNLARGE TREE LIMB BROKEN DOWN ALONG WITH SEVERAL SMALLER BRANCHES. NUMEROUS DIME TO NICKEL SIZED HAIL.
Jun 7, 6:50 PM CDTHAIL 13 Ene Halstad, MNA FEW LARGE HAIL WERE ACCOMPANIED WITH VERY STRONG WINDS AND HEAVY RAINS.

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, 11.3 hours before the alert went out and 294 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-pSkew-T log-p diagram, International Fa, MN at 12:00Z on 2012-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 57 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 12:00Z on 2012-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
57 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
908 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
73 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.

836 
WUUS53 KFGF 072319
SVRFGF
MNC107-119-NDC097-080015-
/O.NEW.KFGF.SV.W.0015.120607T2319Z-120608T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
619 PM CDT THU JUN 7 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN NORMAN COUNTY IN NORTHWEST MINNESOTA...
  SOUTH CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA...
  EASTERN TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 715 PM CDT

* AT 617 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
  SOUTHWEST OF HENDRUM...OR 24 MILES NORTH OF FARGO...MOVING TO THE
  NORTH AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HENDRUM AND KELSO AROUND 625 PM CDT.
  HALSTAD AND HILLSBORO AROUND 640 PM CDT.
  SHELLY AND CALEDONIA AROUND 655 PM CDT.
  NIELSVILLE AROUND 710 PM CDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DURING THUNDERSTORMS YOU SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT
STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES.

&&

LAT...LON 4719 9670 4724 9683 4724 9713 4767 9699
      4757 9647
TIME...MOT...LOC 2319Z 199DEG 20KT 4724 9685
WIND...HAIL 60MPH 1.00IN

$$

HOPPES
2 follow-up statements
618 
WWUS53 KFGF 072353
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
653 PM CDT THU JUN 7 2012

MNC107-119-NDC097-080015-
/O.CON.KFGF.SV.W.0015.000000T0000Z-120608T0015Z/
NORMAN MN-TRAILL ND-POLK MN-
653 PM CDT THU JUN 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
POLK AND WESTERN NORMAN COUNTIES IN NORTHWEST MINNESOTA...AND EASTERN
TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA UNTIL 715 PM CDT...

AT 650 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 HALSTAD...OR 36 MILES NORTH OF FARGO...MOVING TO THE 
NORTH AT 25 MPH. AT 630 PM CDT...A LARGE TREE LIMB WAS DOWN ONE MILE 
NORTH NORTHWEST OF HENDRUM. 

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SHELLY AROUND 700 PM CDT.
  NIELSVILLE AROUND 710 PM CDT.
  CLIMAX AND BELTRAMI AROUND 715 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL
POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCED
BUILDING IMMEDIATELY.

&&

LAT...LON 4719 9670 4724 9683 4724 9713 4767 9699
      4757 9647
TIME...MOT...LOC 2352Z 199DEG 20KT 4741 9677

$$

HOPPES
438 
WWUS53 KFGF 080015
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
715 PM CDT THU JUN 7 2012

MNC107-119-NDC097-080025-
/O.EXP.KFGF.SV.W.0015.000000T0000Z-120608T0015Z/
NORMAN MN-TRAILL ND-POLK MN-
715 PM CDT THU JUN 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL POLK AND WESTERN
NORMAN COUNTIES IN NORTHWEST MINNESOTA...AND EASTERN TRAILL COUNTY IN
SOUTHEAST NORTH DAKOTA HAS EXPIRED...

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

LAT...LON 4719 9670 4724 9683 4724 9713 4767 9699
      4757 9647
TIME...MOT...LOC 0015Z 199DEG 20KT 4745 9667

$$

HOPPES

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 1:05 AM CDTSpecial Weather StatementFGFBenson55 min
Jun 7, 4:23 PM CDTSpecial Weather StatementFGFRansom67 min
Jun 7, 5:10 PM CDTSpecial Weather StatementFGFBarnes65 min
Jun 7, 5:15 PM CDTSpecial Weather StatementFGFCass60 min
Jun 7, 5:23 PM CDTSevere Thunderstorm WarningFGFCass52 min
Jun 7, 6:38 PM CDTSpecial Weather StatementFGFBenson67 min
Jun 7, 6:44 PM CDTSevere Thunderstorm WarningFGFGrand Forks, Traill31 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Severe Thunderstorm Warnings in North Dakota, 2012Every 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.