Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 13, NWS Grand Forks, ND

June 7, 2015Mahnomen County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 7, 2015, 4:38 PM CDT for Mahnomen County, Minnesota. It was in force for 29 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 7, 2015, 4:38 PM CDT (21:38 UTC)
Expired
Jun 7, 2015, 5:07 PM CDT
In force
29 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Mahnomen County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 114 km from the middle of the area, began a volume at 21:41 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, 5:00 PM CDTFUNNEL CLOUD4 Sw Naytahwaush, MNPHOTO AND REPORT POSTED TO SOCIAL MEDIA.

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, 9.6 hours before the alert went out and 233 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 2015-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 12:00Z on 2015-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -78 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
5 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
469 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-78 m²/s²
0-3 km storm-relative helicity
-48 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.

792 
WUUS53 KFGF 072138
SVRFGF
MNC087-072245-
/O.NEW.KFGF.SV.W.0013.150607T2138Z-150607T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
438 PM CDT SUN JUN 7 2015

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL MAHNOMEN COUNTY IN NORTHWESTERN MINNESOTA...

* UNTIL 545 PM CDT

* AT 438 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER BEJOU...OR
  42 MILES NORTH OF DETROIT LAKES...MOVING SOUTHEAST AT 25 MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  MAHNOMEN AROUND 450 PM CDT.
  BEAULIEU AROUND 500 PM CDT.
  NAYTAHWAUSH AROUND 525 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4729 9555 4715 9580 4740 9607 4741 9606
      4749 9597
TIME...MOT...LOC 2138Z 313DEG 22KT 4742 9599 

HAIL...1.00IN
WIND...<50MPH
 
$$

DK
2 follow-up statements
597 
WWUS53 KFGF 072154
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
454 PM CDT SUN JUN 7 2015

MNC087-072245-
/O.CON.KFGF.SV.W.0013.000000T0000Z-150607T2245Z/
MAHNOMEN MN-
454 PM CDT SUN JUN 7 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR CENTRAL MAHNOMEN COUNTY...

AT 454 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BEAULIEU...OR
37 MILES NORTH OF DETROIT LAKES...MOVING SOUTHEAST AT 25 MPH.

HAZARD...QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

THIS SEVERE STORM WILL BE NEAR...
  BEAULIEU AROUND 500 PM CDT.
  NAYTAHWAUSH AROUND 525 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4729 9555 4715 9580 4732 9598 4744 9587
TIME...MOT...LOC 2154Z 313DEG 22KT 4735 9588 

HAIL...1.00IN
WIND...<50MPH
 
$$

DK
264 
WWUS53 KFGF 072207
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
507 PM CDT SUN JUN 7 2015

MNC087-072217-
/O.CAN.KFGF.SV.W.0013.000000T0000Z-150607T2245Z/
MAHNOMEN MN-
507 PM CDT SUN JUN 7 2015

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MAHNOMEN COUNTY IS
CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4729 9555 4715 9580 4732 9598 4744 9587
TIME...MOT...LOC 2205Z 313DEG 22KT 4729 9579 

$$

DK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 7:09 PM CDTSpecial Weather StatementFGFOtter Tail66 min
Jun 6, 7:39 PM CDTSpecial Weather StatementFGFOtter Tail36 min
Jun 6, 11:21 PM CDTDense Fog AdvisoryFGFKittson, Marshall, Polk8 hr
Jun 7, 1:32 PM CDTSpecial Weather StatementFGFMarshall58 min
Jun 7, 1:45 PM CDTSevere Thunderstorm WarningFGFMarshall, Polk60 min
Jun 7, 1:57 PM CDTSevere Thunderstorm WarningFGFKittson63 min
Jun 7, 2:13 PM CDTTornado WarningFGFMarshall, Polk47 min
Jun 7, 2:33 PM CDTSevere Thunderstorm WarningFGFKittson, Marshall29 min
Jun 7, 3:13 PM CDTSevere Thunderstorm WarningFGFNorman, Polk62 min
Jun 7, 3:39 PM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods, Roseau32 min
Jun 7, 3:48 PM CDTSevere Thunderstorm WarningFGFPolk, Red Lake42 min
Jun 7, 4:39 PM CDTSevere Thunderstorm WarningFGFPolk36 min
Jun 7, 5:59 PM CDTSpecial Weather StatementFGFHubbard61 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015Every severe thunderstorm warning in 2015

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.