Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 68, NWS Milwaukee, WI

July 26, 20124 counties in Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 26, 2012, 12:53 AM CDT for 4 counties in Wisconsin. It was in force for 37 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 26, 2012, 12:53 AM CDT (05:53 UTC)
Expired
Jul 26, 2012, 1:30 AM CDT
In force
37 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

Counties Columbia County, WI, Dane County, WI, Green County, WI, Rock County, WI

The radar

The Milwaukee radar (KMKX), 83 km from the middle of the area, began a volume at 05:55 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.

IssuedProductOfficeLasted
Jul 25, 6:38 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 5.9 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2012-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 700 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, Davenport, at 00:00Z on 2012-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.193958Sfc1 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
700 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
2702 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
158 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

849 
WUUS53 KMKX 260553
SVRMKX
WIC021-025-045-105-260630-
/O.NEW.KMKX.SV.W.0068.120726T0553Z-120726T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1253 AM CDT THU JUL 26 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COLUMBIA COUNTY IN SOUTH CENTRAL WISCONSIN...
  DANE COUNTY IN SOUTH CENTRAL WISCONSIN...
  GREEN COUNTY IN SOUTH CENTRAL WISCONSIN...
  WESTERN ROCK COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 130 AM CDT

* AT 1246 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 5 MILES NORTH OF RANDOLPH
  TO BELOIT...AND MOVING EAST AT 95 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS!

THIS IS AN EXTREMELY DANGEROUS SITUATION. MOBILE HOMES AND HIGH 
PROFILE VEHICLES ARE ESPECIALLY SUSCEPTIBLE TO WINDS OF THIS 
MAGNITUDE AND MAY BE OVERTURNED. FOR YOUR PROTECTION MOVE TO AN 
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THESE 
STORMS HAVE THE POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT 
DAMAGE TO PROPERTY.

&&

LAT...LON 4252 8978 4319 8983 4328 8970 4332 8961
      4354 8958 4364 8969 4362 8901 4255 8899
TIME...MOT...LOC 0553Z 268DEG 82KT 4362 8880 4253 8880
WIND...HAIL 70MPH 1.00IN

$$

REM
2 follow-up statements
783 
WWUS53 KMKX 260605
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
105 AM CDT THU JUL 26 2012

WIC021-025-045-105-260630-
/O.CON.KMKX.SV.W.0068.000000T0000Z-120726T0630Z/
COLUMBIA WI-DANE WI-GREEN WI-ROCK WI-
105 AM CDT THU JUL 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
ROCK...GREEN...DANE AND COLUMBIA COUNTIES UNTIL 130 AM CDT...

AT 100 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF MARKESAN TO 6
MILES NORTH OF EDGERTON TO MILTON TO SHARON...MOVING EAST AT 55 MPH.

SEVERE THUNDERSTORMS WITH DAMAGING WINDS IN EXCESS OF 70 MPH WILL 
AFFECT THESE AREAS THROUGH 130 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

&&

LAT...LON 4252 8978 4319 8983 4328 8970 4332 8961
      4354 8958 4364 8969 4362 8901 4255 8899
TIME...MOT...LOC 0603Z 267DEG 48KT 4363 8896 4292 8901
          4275 8881 4252 8874
WIND...HAIL 70MPH 1.00IN

$$

WOOD
467 
WWUS53 KMKX 260628
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
128 AM CDT THU JUL 26 2012

WIC021-025-045-105-260638-
/O.EXP.KMKX.SV.W.0068.000000T0000Z-120726T0630Z/
COLUMBIA WI-DANE WI-GREEN WI-ROCK WI-
128 AM CDT THU JUL 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN ROCK...GREEN...DANE
AND COLUMBIA COUNTIES WILL EXPIRE AT 130 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED TO THE 
EAST. SHOWERS AND THUNDERSTORMS WITH GUSTY WINDS WILL LINGER THROUGH 
230 AM. 

LAT...LON 4252 8978 4319 8983 4328 8970 4332 8961
      4354 8958 4364 8969 4362 8901 4255 8899
TIME...MOT...LOC 0628Z 267DEG 48KT 4365 8850 4294 8855
          4276 8836 4253 8829

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 8:26 PM CDTSpecial Marine WarningMKX64 min
Jul 25, 9:34 PM CDTSevere Thunderstorm WarningMKXIowa26 min
Jul 25, 9:51 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette32 min
Jul 25, 11:20 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette40 min
Jul 25, 11:39 PM CDTSevere Thunderstorm WarningMKXLafayette51 min
Jul 25, 11:39 PM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac, Washington21 min
Jul 25, 11:52 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette, Sauk38 min
Jul 26, 12:00 AM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac30 min
Jul 26, 12:10 AM CDTSevere Thunderstorm WarningMKXColumbia, Dane, Green, Rock35 min
Jul 26, 12:35 AM CDTSevere Thunderstorm WarningMKXColumbia, Dodge, Jefferson, Rock, Walworth, Waukesha70 min
Jul 26, 12:41 AM CDTSevere Thunderstorm WarningMKXFond du Lac49 min
Jul 26, 1:13 AM CDTSevere Thunderstorm WarningMKXFond du Lac, Sheboygan32 min
Jul 26, 1:24 AM CDTSpecial Marine WarningMKX96 min
Jul 26, 1:26 AM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac, Kenosha, Milwaukee, Ozaukee, Racine and 4 more64 min
Jul 26, 2:20 PM CDTSpecial Marine WarningMKX85 min
Jul 26, 2:47 PM CDTSevere Thunderstorm WarningMKXSheboygan28 min
Jul 26, 2:56 PM CDTSevere Thunderstorm WarningMKXOzaukee, Washington34 min
Jul 26, 3:03 PM CDTSpecial Marine WarningMKX72 min
Jul 26, 3:38 PM CDTSpecial Marine WarningMKX2 hr
Jul 26, 3:46 PM CDTSpecial Marine WarningMKX44 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012Every severe thunderstorm warning in 2012

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.