Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 106, NWS Twin Cities, MN

July 6, 2017Kanabec County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 6, 2017, 4:26 AM CDT for Kanabec County, Minnesota. It was in force for 11 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 6, 2017, 4:26 AM CDT (09:26 UTC)
Expired
Jul 6, 2017, 4:37 AM CDT
In force
11 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Kanabec County, MN

The radar

The Duluth radar (KDLH), 117 km from the middle of the area, began a volume at 09:28 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 6, 3:26 AM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.4 hours before the alert went out and 132 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, Minneapolis, MN at 00:00Z on 2017-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2692 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, Minneapolis, MN at 00:00Z on 2017-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.1939Sfc1 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
2692 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
1493 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.4
Supercell composite
4.7

Open this sounding in Storm Lab

The text

As transmitted.

555 
WUUS53 KMPX 060926
SVRMPX
MNC065-061000-
/O.NEW.KMPX.SV.W.0106.170706T0926Z-170706T1000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
426 AM CDT THU JUL 6 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  East central Kanabec County in east central Minnesota...

* Until 500 AM CDT

* At 426 AM CDT, a severe thunderstorm was located near Brook Park,
  or 9 miles west of Hinckley, moving southeast at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* this severe thunderstorm will remain over mainly rural areas of
  east central Kanabec County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4598 9306 4598 9314 4593 9314 4592 9315
      4601 9321 4610 9306
TIME...MOT...LOC 0926Z 329DEG 11KT 4601 9313 

HAIL...1.00IN
WIND...60MPH
 
$$

SPD
1 follow-up statement
615 
WWUS53 KMPX 060937
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
437 AM CDT THU JUL 6 2017

MNC065-060947-
/O.CAN.KMPX.SV.W.0106.000000T0000Z-170706T1000Z/
Kanabec MN-
437 AM CDT THU JUL 6 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL KANABEC COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.

A severe thunderstorm watch remains in effect until 1100 AM CDT for
east central Minnesota.

Remember, a Severe Thunderstorm Warning still remains in effect for
all of Kanabec County.

LAT...LON 4598 9306 4598 9314 4593 9314 4592 9315
      4601 9321 4610 9306
TIME...MOT...LOC 0936Z 329DEG 11KT 4598 9311 

$$

SPD

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 1:28 AM CDTSevere Thunderstorm WarningMPXKanabec32 min
Jul 6, 1:59 AM CDTSevere Thunderstorm WarningMPXKanabec31 min
Jul 6, 2:28 AM CDTSevere Thunderstorm WarningMPXKanabec62 min
Jul 6, 2:43 AM CDTSpecial Weather StatementMPXDouglas32 min
Jul 6, 3:20 AM CDTSpecial Weather StatementMPXKanabec3 hr
Jul 6, 3:27 AM CDTFlash Flood WarningMPXKanabec3 hr
Jul 6, 3:38 AM CDTSpecial Weather StatementMPXTodd67 min
Jul 6, 3:48 AM CDTSevere Thunderstorm WarningMPXKanabec57 min
Jul 6, 4:34 AM CDTSevere Thunderstorm WarningMPXBenton, Isanti, Kanabec, Mille Lacs, Morrison26 min
Jul 6, 4:47 AM CDTSpecial Weather StatementMPXBenton, Sherburne, Stearns28 min
Jul 6, 5:37 AM CDTSevere Thunderstorm WarningMPXChisago38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017Every severe thunderstorm warning in 2017

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.