Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 61, NWS Grand Forks, ND

July 4, 2012Marshall County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 4, 2012, 9:56 AM CDT for Marshall County, Roseau County, Minnesota. It was in force for 64 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
Jul 4, 2012, 9:56 AM CDT (14:56 UTC)
Expired
Jul 4, 2012, 11:00 AM CDT
In force
64 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Marshall County, MN, Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 181 km from the middle of the area, began a volume at 14:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 4, 8:10 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 2.9 hours before the alert went out and 184 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 2012-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 113 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 2012-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.193958Sfc1 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
113 J/kg
Mixed-layer CIN
-490 J/kg
Mixed-layer LCL
1552 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
101 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.

557 
WUUS53 KFGF 041456
SVRFGF
MNC089-135-041600-
/O.NEW.KFGF.SV.W.0061.120704T1456Z-120704T1600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
956 AM CDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN MARSHALL COUNTY IN NORTHWEST MINNESOTA...
  ROSEAU COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 1100 AM CDT

* AT 955 AM 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 PINECREEK TO
  NEAR FOX TO 6 MILES EAST OF STRATHCONA TO 5 MILES EAST OF
  NEWFOLDEN...MOVING TO THE EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ROSEAU AROUND 1005 AM CDT.
  WANNASKA AND MALUNG AROUND 1010 AM CDT.
  TORFIN AND PENCER AROUND 1015 AM CDT.
  SALOL...GATZKE AND CASPERSON AROUND 1020 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORMS
INCLUDE SKIME.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4900 9534 4837 9569 4835 9645 4900 9629
      4901 9559
TIME...MOT...LOC 1456Z 276DEG 35KT 4899 9602 4883 9590
          4858 9602 4836 9621
WIND...HAIL 60MPH 1.00IN

$$
SPEICHER
2 follow-up statements
911 
WWUS53 KFGF 041535
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1035 AM CDT WED JUL 4 2012

MNC089-135-041600-
/O.CON.KFGF.SV.W.0061.000000T0000Z-120704T1600Z/
ROSEAU MN-MARSHALL MN-
1035 AM CDT WED JUL 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
MARSHALL AND CENTRAL ROSEAU COUNTIES IN NORTHWEST MINNESOTA UNTIL
1100 AM CDT...

AT 1029 AM 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 8 MILES NORTH OF SALOL TO 5 MILES
NORTHEAST OF PENCER TO NEAR CASPERSON TO 3 MILES WEST OF GATZKE...
MOVING TO THE EAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF CENTRAL ROSEAU
AND NORTHEASTERN MARSHALL COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4900 9535 4837 9569 4836 9610 4900 9604
      4901 9601 4900 9597 4901 9596 4901 9559
TIME...MOT...LOC 1535Z 276DEG 35KT 4897 9545 4876 9549
          4858 9557 4841 9575
WIND...HAIL 60MPH 1.00IN

$$
SPEICHER
389 
WWUS53 KFGF 041552
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1052 AM CDT WED JUL 4 2012

MNC089-135-041602-
/O.EXP.KFGF.SV.W.0061.000000T0000Z-120704T1600Z/
ROSEAU MN-MARSHALL MN-
1052 AM CDT WED JUL 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MARSHALL AND
CENTRAL ROSEAU COUNTIES IN NORTHWEST MINNESOTA WILL EXPIRE AT 1100 AM
CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

LAT...LON 4900 9535 4837 9569 4836 9610 4900 9604
      4901 9601 4900 9597 4901 9596 4901 9559
TIME...MOT...LOC 1552Z 276DEG 35KT 4877 9538 4870 9538
          4856 9544 4847 9556

$$
SPEICHER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 4:12 AM CDTHeat AdvisoryFGFBecker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more18 hr
Jul 4, 7:54 AM CDTSevere Thunderstorm WarningFGFKittson, Marshall66 min
Jul 4, 8:58 AM CDTSevere Thunderstorm WarningFGFKittson, Marshall, Roseau62 min
Jul 4, 10:08 AM CDTSevere Thunderstorm WarningFGFPolk67 min
Jul 4, 10:36 AM CDTSevere Thunderstorm WarningFGFMarshall, Pennington, Polk54 min
Jul 4, 11:27 AM CDTSpecial Weather StatementFGFPennington63 min
Jul 4, 12:02 PM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods43 min
Jul 4, 1:01 PM CDTSevere Thunderstorm WarningFGFBeltrami59 min
Jul 4, 1:52 PM CDTSevere Thunderstorm WarningFGFBeltrami24 min
Jul 4, 4:55 PM CDTSpecial Weather StatementFGFHubbard50 min

Nearby

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