Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 13, NWS Milwaukee, WI

May 20, 2013Sauk County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 20, 2013, 12:58 AM CDT for Sauk County, Wisconsin. It was in force for 32 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: May 20, 2013, 12:58 AM CDT (05:58 UTC)
Expired: May 20, 2013, 1:30 AM CDT
In force: 32 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Sauk County, WI

The radar

The La Crosse radar (KARX), 99 km from the middle of the area, began a volume at 06:01 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
May 19, 8:10 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.0 hours before the alert went out and 185 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: 117 J/kg
Mixed-layer CIN: -276 J/kg
Mixed-layer LCL: 1683 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

459 
WUUS53 KMKX 200558
SVRMKX
WIC111-200630-
/O.NEW.KMKX.SV.W.0013.130520T0558Z-130520T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1258 AM CDT MON MAY 20 2013

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN SAUK COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 130 AM CDT

* AT 1256 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
  LINE EXTENDING FROM ELROY TO 9 MILES SOUTH OF REEDSBURG...AND
  MOVING NORTHEAST AT 60 MPH.

  HAZARD...HALF DOLLAR SIZE HAIL AND 60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...HAIL DAMAGE TO VEHICLES AND CROPS IS EXPECTED. EXPECT WIND
           DAMAGE TO ROOFS...SIDING AND TREES.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WISCONSIN DELLS AIRPORT AROUND 105 AM CDT.
  LAKE DELTON AROUND 110 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4365 9031 4365 8979 4360 8976 4360 8972
      4357 8973 4357 8967 4327 9018 4330 9020
      4355 9020 4356 9031
TIME...MOT...LOC 0558Z 221DEG 53KT 4378 9016 4343 8992

HAIL...1.25IN
WIND...60MPH

$$

MGG

3 follow-up statements

059 
WWUS53 KMKX 200608
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
108 AM CDT MON MAY 20 2013

WIC111-200630-
/O.CON.KMKX.SV.W.0013.000000T0000Z-130520T0630Z/
SAUK WI-
108 AM CDT MON MAY 20 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
SAUK COUNTY UNTIL 130 AM CDT...

AT 100 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM MAUSTON TO WEST BARABOO...AND MOVING NORTHEAST AT
60 MPH.

HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...HAIL DAMAGE TO VEHICLES AND CROPS IS EXPECTED. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF NORTHEASTERN
SAUK COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT
OR SMALL INTERIOR ROOM.

&&

LAT...LON 4365 8979 4362 8977 4361 8977 4360 8976
      4360 8972 4357 8973 4357 8968 4342 8993
      4357 9010 4364 9022
TIME...MOT...LOC 0609Z 221DEG 53KT 4387 9005 4358 8968

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

$$

CRAVEN

609 
WWUS53 KMKX 200617
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
117 AM CDT MON MAY 20 2013

WIC111-200630-
/O.CON.KMKX.SV.W.0013.000000T0000Z-130520T0630Z/
SAUK WI-
117 AM CDT MON MAY 20 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
SAUK COUNTY UNTIL 130 AM CDT...

AT 108 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM MAUSTON TO LAKE DELTON...AND MOVING NORTHEAST AT
60 MPH.

HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...HAIL DAMAGE TO VEHICLES AND CROPS IS EXPECTED. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT
OR SMALL INTERIOR ROOM.

&&

LAT...LON 4365 8979 4363 8978 4361 8977 4360 8976
      4360 8972 4357 8973 4356 8969 4349 8981
      4349 8982 4364 8993
TIME...MOT...LOC 0617Z 221DEG 53KT 4396 8994 4366 8957

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

$$

CRAVEN

904 
WWUS53 KMKX 200625
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
125 AM CDT MON MAY 20 2013

WIC111-200635-
/O.EXP.KMKX.SV.W.0013.000000T0000Z-130520T0630Z/
SAUK WI-
125 AM CDT MON MAY 20 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SAUK COUNTY WILL
EXPIRE AT 130 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.

LAT...LON 4365 8979 4363 8978 4361 8977 4360 8976
      4360 8972 4357 8973 4356 8969 4349 8981
      4349 8982 4364 8993
TIME...MOT...LOC 0625Z 221DEG 53KT 4405 8983 4375 8946

$$

CRAVEN

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 8:48 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	57 min
May 19, 11:36 PM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette	54 min
May 20, 12:25 AM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette, Sauk	35 min
May 20, 1:30 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Green Lake, Marquette	45 min
May 20, 12:21 PM CDT	Small Craft Advisory	MKX		8 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2013 Every severe thunderstorm warning in 2013

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.