Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 104, NWS Twin Cities, MN

July 6, 2017Kanabec County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 6, 2017, 2:28 AM CDT for Kanabec County, Minnesota. It was in force for 62 min. 2 reports 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: Jul 6, 2017, 2:28 AM CDT (07:28 UTC)
Expired: Jul 6, 2017, 3:30 AM CDT
In force: 62 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 2.75 in
Wind: 60.0 mph

County Kanabec County, MN

The radar

The Duluth radar (KDLH), 123 km from the middle of the area, began a volume at 07:32 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

Time	Report	Where	Remark
Jul 6, 2:29 AM CDT	HAIL 1.75	9 Nw Quamba, MN	GOLF BALL SIZED HAIL REPORTED. DAMAGE TO HOME SIDING, WINDOWS BROKEN AND DAMAGE TO CAMPER.
Jul 6, 2:30 AM CDT	HAIL 1.75	9 N Mora, MN	GOLF BALL-SIZED HAIL DAMAGED SIDING & BROKE WINDOWS OF A HOME. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.5 hours before the alert went out and 133 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.

998 
WUUS53 KMPX 060728
SVRMPX
MNC065-060830-
/O.NEW.KMPX.SV.W.0104.170706T0728Z-170706T0830Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
228 AM CDT THU JUL 6 2017

The National Weather Service in The Twin Cities has issued a

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

* Until 330 AM CDT

* At 228 AM CDT, a severe thunderstorm was located over Warman, or 18
  miles west of Hinckley, moving south at 10 mph.

  This is a very dangerous storm. 

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

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be severely injured. 
           Expect shattered windows, extensive damage to roofs, 
           siding, and vehicles. 

* this severe thunderstorm will remain over mainly rural areas of
  central Kanabec County, including the following locations: Knife
  Lake and Warman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

Large hail 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 4609 9339 4610 9320 4594 9314 4592 9342
TIME...MOT...LOC 0728Z 351DEG 7KT 4603 9332 

HAIL...2.75IN
WIND...60MPH
 
$$

SPD

2 follow-up statements

103 
WWUS53 KMPX 060753
SVSMPX

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

MNC065-060830-
/O.CON.KMPX.SV.W.0104.000000T0000Z-170706T0830Z/
Kanabec MN-
253 AM CDT THU JUL 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM CDT
FOR CENTRAL KANABEC COUNTY...

At 252 AM CDT, a severe thunderstorm was located over Knife Lake, or
16 miles west of Hinckley, and is nearly stationary.

HAZARD...Tennis 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. 

Locations impacted include...
Knife Lake and Warman. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

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 4607 9338 4610 9320 4594 9314 4592 9336
TIME...MOT...LOC 0752Z 319DEG 3KT 4601 9328 

HAIL...2.50IN
WIND...60MPH
 
$$

SPD

245 
WWUS53 KMPX 060758
SVSMPX

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

MNC065-060830-
/O.CON.KMPX.SV.W.0104.000000T0000Z-170706T0830Z/
Kanabec MN-
258 AM CDT THU JUL 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM CDT
FOR CENTRAL KANABEC COUNTY...

At 258 AM CDT, a severe thunderstorm was located over Knife Lake, or
16 miles west of Hinckley, moving south 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. 

Locations impacted include...
Knife Lake and Warman. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4607 9338 4610 9320 4594 9314 4592 9336
TIME...MOT...LOC 0758Z 351DEG 7KT 4600 9328 

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

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, 2:43 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, 3:48 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	57 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.