Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 147, NWS Twin Cities, MN

August 14, 2020Chippewa County, Dunn County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 14, 2020, 9:29 PM CDT for Chippewa County, Dunn County, Wisconsin. It was in force for 31 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: Aug 14, 2020, 9:29 PM CDT (02:29 UTC)
Expired: Aug 14, 2020, 10:00 PM CDT
In force: 31 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Chippewa County, WI, Dunn County, WI

The radar

The Minneapolis radar (KMPX), 140 km from the middle of the area, began a volume at 02:31 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
Aug 14, 5:38 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.5 hours before the alert went out and 395 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: 450 J/kg
Mixed-layer CIN: -267 J/kg
Mixed-layer LCL: 1622 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

694 
WUUS53 KMPX 150229
SVRMPX
WIC017-033-150300-
/O.NEW.KMPX.SV.W.0147.200815T0229Z-200815T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
929 PM CDT Fri Aug 14 2020

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northern Dunn County in west central Wisconsin...
  Southwestern Chippewa County in west central Wisconsin...

* Until 1000 PM CDT.

* At 929 PM CDT, a severe thunderstorm was located 7 miles southeast
  of Ridgeland, or 18 miles north of Menomonie, moving east at 45
  mph.

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

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Bloomer and New Auburn around 945 PM CDT.

Other locations impacted by this severe thunderstorm include Cedar
Falls, Downing, Tainter Lake, Tilden, Hoffman Hills Rec Area,
Connorsville and Sand Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4490 9142 4493 9207 4501 9214 4512 9213
      4521 9203 4521 9144
TIME...MOT...LOC 0229Z 266DEG 38KT 4514 9177 

HAIL...0.88IN
WIND...60MPH
 
$$

CTG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 8:13 PM CDT	Severe Thunderstorm Warning	MPX	Polk, Saint Croix	47 min
Aug 14, 8:50 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Dunn, Polk, Saint Croix	40 min
Aug 14, 9:01 PM CDT	Severe Thunderstorm Warning	MPX	Pierce, Saint Croix	44 min
Aug 14, 9:34 PM CDT	Special Weather Statement	MPX	Pepin	56 min
Aug 14, 9:36 PM CDT	Special Weather Statement	MPX	Barron, Rusk	54 min
Aug 14, 10:01 PM CDT	Special Weather Statement	MPX	Chippewa, Dunn	44 min
Aug 14, 10:35 PM CDT	Special Weather Statement	MPX	Eau Claire	40 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2020 Every severe thunderstorm warning in 2020

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.