Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 105, NWS Twin Cities, MN

July 6, 2017Kanabec County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 6, 2017, 3:48 AM CDT for Kanabec County, Minnesota. It was in force for 57 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, 3:48 AM CDT (08:48 UTC)
Expired: Jul 6, 2017, 4:45 AM CDT
In force: 57 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Kanabec County, MN

The radar

The Duluth radar (KDLH), 111 km from the middle of the area, began a volume at 08:48 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.

Issued	Product	Office	Lasted
Jul 6, 3:26 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.8 hours before the alert went out and 140 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

918 
WUUS53 KMPX 060848
SVRMPX
MNC065-060945-
/O.NEW.KMPX.SV.W.0105.170706T0848Z-170706T0945Z/

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

The National Weather Service in The Twin Cities has issued a

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

* Until 445 AM CDT

* At 348 AM CDT, a severe thunderstorm was located near Mcgrath, or
  16 miles northwest of Hinckley, moving southeast at 10 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees. 

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4600 9306 4601 9320 4615 9327 4616 9306
TIME...MOT...LOC 0848Z 308DEG 10KT 4617 9320 

HAIL...1.50IN
WIND...60MPH
 
$$

SPD

1 follow-up statement

257 
WWUS53 KMPX 060936
SVSMPX

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

MNC065-060945-
/O.EXP.KMPX.SV.W.0105.000000T0000Z-170706T0945Z/
Kanabec MN-
436 AM CDT THU JUL 6 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KANABEC COUNTY
WILL EXPIRE AT 445 AM CDT...
                
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 4600 9306 4601 9320 4615 9327 4616 9306
TIME...MOT...LOC 0935Z 270DEG 10KT 4609 9306 

$$

SPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 1:28 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	32 min
Jul 6, 1:59 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	31 min
Jul 6, 2:28 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	62 min
Jul 6, 2:43 AM CDT	Special Weather Statement	MPX	Douglas	32 min
Jul 6, 3:20 AM CDT	Special Weather Statement	MPX	Kanabec	3 hr
Jul 6, 3:27 AM CDT	Flash Flood Warning	MPX	Kanabec	3 hr
Jul 6, 3:38 AM CDT	Special Weather Statement	MPX	Todd	67 min
Jul 6, 4:26 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	11 min
Jul 6, 4:34 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Kanabec, Mille Lacs, Morrison	26 min
Jul 6, 4:47 AM CDT	Special Weather Statement	MPX	Benton, Sherburne, Stearns	28 min
Jul 6, 5:37 AM CDT	Severe Thunderstorm Warning	MPX	Chisago	38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017 Every 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.