Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 19, NWS Twin Cities, MN

April 15, 2017Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 15, 2017, 8:24 PM CDT for Pierce County, Wisconsin. It was in force for 35 min. 1 report 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: Apr 15, 2017, 8:24 PM CDT (01:24 UTC)
Expired: Apr 15, 2017, 8:59 PM CDT
In force: 35 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Pierce County, WI

The radar

The Minneapolis radar (KMPX), 97 km from the middle of the area, began a volume at 01:27 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
Apr 15, 8:30 PM CDT	HAIL 0.75	1 N Ellsworth, WI	REPORTED AT 580TH AVE AND MAPLE STREET, ELLSWORTH, WI.

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, 1.4 hours before the alert went out and 99 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: 174 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 938 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

632 
WUUS53 KMPX 160124
SVRMPX
WIC093-160215-
/O.NEW.KMPX.SV.W.0019.170416T0124Z-170416T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
824 PM CDT SAT APR 15 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northeastern Pierce County in west central Wisconsin...

* Until 915 PM CDT

* At 824 PM CDT, a severe thunderstorm was located over Beldenville,
  or near Ellsworth, moving east at 30 mph.

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

  SOURCE...Trained weather spotters. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* this severe thunderstorm will remain over mainly rural areas of
  northeastern Pierce County, including the following locations:
  Elmwood, Martel, El Paso and Spring Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4470 9250 4486 9247 4486 9213 4464 9214
TIME...MOT...LOC 0124Z 276DEG 27KT 4478 9251 

HAIL...1.00IN
WIND...60MPH
 
$$

BORGHOFF

2 follow-up statements

206 
WWUS53 KMPX 160139
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
839 PM CDT SAT APR 15 2017

WIC093-160215-
/O.CON.KMPX.SV.W.0019.000000T0000Z-170416T0215Z/
Pierce WI-
839 PM CDT SAT APR 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHEASTERN PIERCE COUNTY...

At 838 PM CDT, a severe thunderstorm was located over El Paso, or
near Ellsworth, moving east at 30 mph.

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

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

this severe thunderstorm will remain over mainly rural areas of
northeastern Pierce County, including the following locations: El
Paso, Elmwood and Spring Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4471 9246 4482 9244 4486 9213 4464 9214
TIME...MOT...LOC 0138Z 279DEG 27KT 4476 9236 

HAIL...1.00IN
WIND...60MPH
 
$$

BORGHOFF

123 
WWUS53 KMPX 160159
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
859 PM CDT SAT APR 15 2017

WIC093-160205-
/O.CAN.KMPX.SV.W.0019.000000T0000Z-170416T0215Z/
Pierce WI-
859 PM CDT SAT APR 15 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIERCE COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 4471 9246 4482 9244 4486 9213 4464 9214
TIME...MOT...LOC 0152Z 276DEG 27KT 4475 9218 

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:59 PM CDT	Special Weather Statement	MPX	Polk	31 min
Apr 15, 8:01 PM CDT	Severe Thunderstorm Warning	MPX	Pierce	32 min
Apr 15, 8:42 PM CDT	Special Weather Statement	MPX	Dunn	33 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.