Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 148, NWS Twin Cities, MN

July 12, 2017Kanabec County, Mille Lacs County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 12, 2017, 12:46 AM CDT for Kanabec County, Mille Lacs County, Minnesota. It was in force for 44 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 12, 2017, 12:46 AM CDT (05:46 UTC)
Expired
Jul 12, 2017, 1:30 AM CDT
In force
44 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Kanabec County, MN, Mille Lacs County, MN

The radar

The Duluth radar (KDLH), 123 km from the middle of the area, began a volume at 05:50 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 11, 10:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.8 hours before the alert went out and 135 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 2017-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 913 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 2017-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
913 J/kg
Mixed-layer CIN
-179 J/kg
Mixed-layer LCL
1279 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.1
Supercell composite
4.0

Open this sounding in Storm Lab

The text

As transmitted.

770 
WUUS53 KMPX 120546
SVRMPX
MNC065-095-120630-
/O.NEW.KMPX.SV.W.0148.170712T0546Z-170712T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1246 AM CDT WED JUL 12 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Kanabec County in east central Minnesota...
  Northeastern Mille Lacs County in east central Minnesota...

* Until 130 AM CDT

* At 1246 AM CDT, a severe thunderstorm was located 8 miles west of
  Knife Lake, or 24 miles southeast of Mille Lacs Lake, moving
  southeast at 35 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* This severe thunderstorm will be near,
  Mora around 105 AM CDT. 
  Quamba around 115 AM CDT. 
  Grasston around 120 AM CDT. 

This includes U.S. Highway 169 between mile markers 197 and 200.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4616 9343 4615 9343 4616 9340 4613 9306
      4598 9306 4598 9314 4573 9315 4583 9370
      4617 9349
TIME...MOT...LOC 0546Z 292DEG 29KT 4599 9348 

HAIL...<.75IN
WIND...60MPH
 
$$

BORGHOFF
2 follow-up statements
069 
WWUS53 KMPX 120600
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
100 AM CDT WED JUL 12 2017

MNC095-120609-
/O.CAN.KMPX.SV.W.0148.000000T0000Z-170712T0630Z/
Mille Lacs MN-
100 AM CDT WED JUL 12 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MILLE LACS COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 400 AM CDT for
east central Minnesota.

LAT...LON 4610 9306 4598 9306 4598 9314 4573 9315
      4580 9351 4591 9352 4594 9347 4598 9343
      4613 9339
TIME...MOT...LOC 0559Z 305DEG 22KT 4607 9335 4595 9337 4586 9351 

$$

MNC065-120630-
/O.CON.KMPX.SV.W.0148.000000T0000Z-170712T0630Z/
Kanabec MN-
100 AM CDT WED JUL 12 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR KANABEC COUNTY...

At 1259 AM CDT, severe thunderstorms were located along a line
extending from Warman to near Knife Lake to near Ogilvie, moving
southeast at 25 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

These severe storms will be near...
  Ogilvie around 110 AM CDT. 
  Mora around 115 AM CDT. 
  Quamba around 120 AM CDT. 
  Brunswick and Grasston around 130 AM CDT. 

Other locations impacted by these severe thunderstorms include Knife
Lake, Mora Airport and Warman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4610 9306 4598 9306 4598 9314 4573 9315
      4580 9351 4591 9352 4594 9347 4598 9343
      4613 9339
TIME...MOT...LOC 0559Z 305DEG 22KT 4607 9335 4595 9337 4586 9351 

HAIL...<.75IN
WIND...60MPH
 
$$

BORGHOFF
277 
WWUS53 KMPX 120621
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
121 AM CDT WED JUL 12 2017

MNC065-120631-
/O.EXP.KMPX.SV.W.0148.000000T0000Z-170712T0630Z/
Kanabec MN-
121 AM CDT WED JUL 12 2017

...THE SEVERE THUNDERSTORM WARNING FOR KANABEC COUNTY WILL EXPIRE AT
130 AM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However heavy rain
is still possible with these thunderstorms.

A severe thunderstorm watch remains in effect until 400 AM CDT for
east central Minnesota.

LAT...LON 4610 9306 4598 9306 4598 9314 4573 9315
      4580 9351 4591 9352 4594 9347 4598 9343
      4613 9339
TIME...MOT...LOC 0621Z 292DEG 29KT 4601 9312 4589 9314 4580 9328 

$$

BORGHOFF

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 11:02 PM CDTSpecial Weather StatementMPXSwift28 min
Jul 11, 11:14 PM CDTSevere Thunderstorm WarningMPXDouglas46 min
Jul 11, 11:27 PM CDTSevere Thunderstorm WarningMPXPope33 min
Jul 11, 11:59 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stearns, Todd46 min
Jul 12, 12:10 AM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison35 min
Jul 12, 12:45 AM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stearns, Todd21 min
Jul 12, 1:44 AM CDTSevere Thunderstorm WarningMPXAnoka, Benton, Isanti, Mille Lacs, Sherburne46 min
Jul 12, 2:27 AM CDTSpecial Weather StatementMPXAnoka, Ramsey, Washington33 min
Jul 12, 2:48 AM CDTSevere Thunderstorm WarningMPXDakota, Ramsey, Washington27 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.