Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 208, NWS Twin Cities, MN

September 22, 2017Kanabec County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 22, 2017, 5:40 AM CDT for Kanabec County, Minnesota. It was in force for 21 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: Sep 22, 2017, 5:40 AM CDT (10:40 UTC)
Expired: Sep 22, 2017, 6:01 AM CDT
In force: 21 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), 113 km from the middle of the area, began a volume at 10:40 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.7 hours before the alert went out and 142 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: 1879 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1223 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 278 m²/s²
0-3 km storm-relative helicity: 414 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 15.2

Open this sounding in Storm Lab

The text

As transmitted.

287 
WUUS53 KMPX 221040
SVRMPX
MNC065-221115-
/O.NEW.KMPX.SV.W.0208.170922T1040Z-170922T1115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
540 AM CDT FRI SEP 22 2017

The National Weather Service in The Twin Cities has issued a

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

* Until 615 AM CDT

* At 540 AM CDT, a severe thunderstorm was located near Warman, or 18
  miles northwest of Hinckley, moving east at 30 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, including the following locations:
  Warman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4606 9306 4601 9337 4615 9342 4616 9341
      4616 9306
TIME...MOT...LOC 1040Z 266DEG 26KT 4614 9328 

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

SPD

1 follow-up statement

256 
WWUS53 KMPX 221101
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
601 AM CDT FRI SEP 22 2017

MNC065-221111-
/O.CAN.KMPX.SV.W.0208.000000T0000Z-170922T1115Z/
Kanabec MN-
601 AM CDT FRI SEP 22 2017

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

LAT...LON 4606 9306 4601 9337 4615 9342 4616 9341
      4616 9306
TIME...MOT...LOC 1059Z 266DEG 26KT 4615 9306 

$$

SPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 22, 12:13 AM CDT	Special Weather Statement	MPX	Mille Lacs	32 min
Sep 22, 3:30 AM CDT	Severe Thunderstorm Warning	MPX	Douglas	30 min
Sep 22, 4:00 AM CDT	Special Weather Statement	MPX	Todd	45 min
Sep 22, 4:14 AM CDT	Severe Thunderstorm Warning	MPX	Todd	34 min
Sep 22, 4:28 AM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	21 min
Sep 22, 7:01 AM CDT	Special Weather Statement	MPX	Kanabec, Mille Lacs	59 min
Sep 22, 7:03 AM CDT	Special Weather Statement	MPX	Wright	42 min
Sep 22, 8:03 AM CDT	Special Weather Statement	MPX	Sherburne	42 min
Sep 22, 8:18 AM CDT	Special Weather Statement	MPX	Kanabec, Mille Lacs	57 min
Sep 22, 8:27 AM CDT	Special Weather Statement	MPX	Isanti	48 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.