Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 49, NWS Milwaukee, WI

May 17, 2017Columbia County, Marquette County, Sauk County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 17, 2017, 8:22 PM CDT for Columbia County, Marquette County, Sauk County, Wisconsin. It was in force for 38 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
May 17, 2017, 8:22 PM CDT (01:22 UTC)
Expired
May 17, 2017, 9:00 PM CDT
In force
38 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Columbia County, WI, Marquette County, WI, Sauk County, WI

The radar

The La Crosse radar (KARX), 117 km from the middle of the area, began a volume at 01:22 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

TimeReportWhereRemark
May 17, 8:48 PM CDTTSTM WND DMG1 Sw Baraboo, WILARGE TREE DOWN 20 INCH DIAMETER.
May 17, 9:00 PM CDTTSTM WND DMGPortage, WINUMEROUS REPORTS OF TREES DOWN ACROSS WESTERN COLUMBIA COUNTY.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 17, 3:13 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.4 hours before the alert went out and 177 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 2017-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 483 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 2017-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
483 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1467 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.2
Supercell composite
7.7

Open this sounding in Storm Lab

The text

As transmitted.

744 
WUUS53 KMKX 180122
SVRMKX
WIC021-077-111-180200-
/O.NEW.KMKX.SV.W.0049.170518T0122Z-170518T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
822 PM CDT WED MAY 17 2017

The National Weather Service in Milwaukee/Sullivan has issued a

* Severe Thunderstorm Warning for...
  Central Columbia County in south central Wisconsin...
  Sauk County in south central Wisconsin...
  Marquette County in south central Wisconsin...

* Until 900 PM CDT

* At 821 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles southeast of Sparta to near Reedsburg to 8
  miles northwest of Mazomanie, moving northeast at 55 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. 

* Locations impacted include...
  Baraboo, Portage, Reedsburg, Prairie Du Sac, Sauk City, Wisconsin
  Dells, Lake Wisconsin, Lodi, Lake Delton, Poynette, Pardeeville,
  West Baraboo, Westfield, Lawrence, Packwaukee, Arlington, Plain,
  Wyocena, North Freedom and Oxford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 1100 PM CDT for south central
Wisconsin.

LAT...LON 4398 8939 4328 8926 4328 8936 4329 8937
      4329 8971 4326 8974 4324 8980 4319 8986
      4320 8999 4317 9005 4349 9012 4353 9019
      4356 9020 4356 9024 4360 9032 4364 9031
      4364 8960 4398 8960
TIME...MOT...LOC 0121Z 220DEG 47KT 4389 9068 4355 9006 4326 8993 

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

BSH
2 follow-up statements
231 
WWUS53 KMKX 180136
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
836 PM CDT WED MAY 17 2017

WIC021-077-111-180200-
/O.CON.KMKX.SV.W.0049.000000T0000Z-170518T0200Z/
Columbia WI-Sauk WI-Marquette WI-
836 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR CENTRAL COLUMBIA...SAUK AND MARQUETTE COUNTIES...

At 835 PM CDT, severe thunderstorms were located along a line
extending from near Tomah to 7 miles northwest of Wisconsin Dells to
near Prairie Du Sac, moving northeast at 55 mph.

HAZARD...70 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings. 

Locations impacted include...
Baraboo, Portage, Reedsburg, Prairie Du Sac, Sauk City, Wisconsin
Dells, Lake Wisconsin, Lodi, Lake Delton, Poynette, Pardeeville, West
Baraboo, Westfield, Lawrence, Packwaukee, Arlington, Plain, Wyocena,
North Freedom and Oxford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 1100 PM CDT for south central
Wisconsin.

LAT...LON 4398 8939 4328 8926 4328 8936 4329 8937
      4329 8971 4326 8974 4324 8980 4319 8986
      4320 8999 4317 9005 4349 9012 4353 9019
      4356 9020 4356 9024 4360 9032 4364 9031
      4364 8960 4398 8960
TIME...MOT...LOC 0135Z 219DEG 47KT 4402 9052 4368 8990 4333 8975 

HAIL...1.00IN
WIND...70MPH
 
$$

HALBACH
825 
WWUS53 KMKX 180149
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
849 PM CDT WED MAY 17 2017

WIC021-077-111-180200-
/O.CON.KMKX.SV.W.0049.000000T0000Z-170518T0200Z/
Columbia WI-Sauk WI-Marquette WI-
849 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR CENTRAL COLUMBIA...NORTHEASTERN SAUK AND MARQUETTE COUNTIES...

At 849 PM CDT, severe thunderstorms were located along a line
extending from 6 miles west of Necedah to 10 miles northeast of
Wisconsin Dells to near Poynette, moving east at 60 mph.

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

SOURCE...Radar indicated. 

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

Locations impacted include...
Baraboo, Portage, Prairie Du Sac, Sauk City, Wisconsin Dells, Lake
Wisconsin, Lodi, Lake Delton, Poynette, Pardeeville, West Baraboo,
Westfield, Lawrence, Packwaukee, Arlington, Wyocena, Oxford,
Endeavor, Merrimac and Harmony Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 100 AM CDT for south central
Wisconsin.

LAT...LON 4398 8939 4328 8926 4328 8936 4329 8937
      4329 8971 4326 8974 4364 8988 4364 8960
      4398 8960
TIME...MOT...LOC 0149Z 258DEG 54KT 4404 9020 4370 8958 4335 8944 

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

HALBACH

The office that day

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

IssuedProductOfficeCountiesLasted
May 17, 7:11 PM CDTSevere Thunderstorm WarningMKXDodge, Jefferson, Washington, Waukesha34 min
May 17, 7:14 PM CDTSevere Thunderstorm WarningMKXMilwaukee, Racine, Waukesha16 min
May 17, 7:27 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette33 min
May 17, 7:54 PM CDTSevere Thunderstorm WarningMKXColumbia, Dane, Green, Iowa, Lafayette, Sauk36 min
May 17, 8:14 PM CDTSpecial Marine WarningMKX31 min
May 17, 8:20 PM CDTSevere Thunderstorm WarningMKXDane, Green, Iowa, Lafayette, Rock40 min
May 17, 8:53 PM CDTSevere Thunderstorm WarningMKXDane, Green, Jefferson, Rock37 min
May 17, 8:55 PM CDTSevere Thunderstorm WarningMKXColumbia, Dodge, Green Lake, Marquette50 min
May 17, 9:22 PM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac, Washington38 min
May 17, 9:25 PM CDTSevere Thunderstorm WarningMKXDane, Green, Jefferson, Rock, Walworth, Waukesha35 min
May 17, 9:59 PM CDTSevere Thunderstorm WarningMKXRock, Walworth31 min
May 17, 10:24 PM CDTSpecial Marine WarningMKX51 min
May 17, 10:28 PM CDTSevere Thunderstorm WarningMKXWalworth32 min
May 17, 10:29 PM CDTSpecial Weather StatementMKXKenosha, Milwaukee, Racine, Walworth, Waukesha46 min
May 17, 10:33 PM CDTTornado WarningMKXWalworth27 min
May 17, 10:36 PM CDTSpecial Marine WarningMKX84 min
May 17, 10:55 PM CDTSevere Thunderstorm WarningMKXKenosha, Racine, Walworth20 min
May 17, 11:53 PM CDTSpecial Marine WarningMKX67 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2017Every 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.