Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 108, NWS Twin Cities, MN

July 6, 2017Barron County, Polk County, Wisconsin; Chisago County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 6, 2017, 5:37 AM CDT for Barron County, Polk County, Wisconsin; Chisago County, Minnesota. It was in force for 38 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, 5:37 AM CDT (10:37 UTC)
Expired: Jul 6, 2017, 6:15 AM CDT
In force: 38 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Chisago County, MN, Barron County, WI, Polk County, WI

The radar

The Minneapolis radar (KMPX), 118 km from the middle of the area, began a volume at 10:37 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, 10.6 hours before the alert went out and 120 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.

180 
WUUS53 KMPX 061037
SVRMPX
MNC025-WIC005-095-061115-
/O.NEW.KMPX.SV.W.0108.170706T1037Z-170706T1115Z/

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

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Chisago County in east central Minnesota...
  Western Barron County in northwestern Wisconsin...
  Polk County in northwestern Wisconsin...

* Until 615 AM CDT

* At 537 AM CDT, severe thunderstorms were located along a line
  extending from near Trade Lake to Wolf Creek to near Stacy, moving
  southeast at 60 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Severe thunderstorms will be near,
  Frederic, Luck and Centuria around 545 AM CDT. 
  Balsam Lake and Milltown around 550 AM CDT. 
  Osceola, St. Croix Falls, Taylors Falls and Dresser around 555 AM 
  CDT. 
  Cumberland and Turtle Lake around 605 AM CDT. 
  Amery, Almena and Clayton around 610 AM CDT. 
  Clear Lake and Haugen around 615 AM CDT. 

Other locations impacted by these severe thunderstorms include
Cumberland Airport, Osceola Airport, Range, Wanderoos, Shafer, Joel,
Barronett, Wolf Creek, Mckinley and Reeve.

This includes the following highways...
 Interstate 35 between mile markers 139 and 144.
 U.S. Highway 53 near mile marker 152.
 U.S. Highway 8 in Minnesota between mile markers 7 and 22.
 U.S. Highway 61 near mile marker 165.

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 these storms. 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.

&&

LAT...LON 4564 9215 4564 9176 4532 9195 4521 9210
      4521 9242 4538 9302 4545 9302 4559 9277
      4564 9272 4565 9253 4573 9252 4572 9215
TIME...MOT...LOC 1037Z 293DEG 51KT 4572 9256 4557 9270 4545 9298 

HAIL...<.75IN
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, 4:41 AM CDT	Special Weather Statement	MPX	Polk	34 min
Jul 6, 6:15 AM CDT	Special Weather Statement	MPX	Barron	60 min
Jul 6, 7:12 AM CDT	Special Weather Statement	MPX	Chippewa	48 min
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, 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

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2017 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.