Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 13, NWS Milwaukee, WI

May 3, 2012Dane County, Jefferson County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 3, 2012, 3:52 PM CDT for Dane County, Jefferson County, Wisconsin. It was in force for 23 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 3, 2012, 3:52 PM CDT (20:52 UTC)
Expired: May 3, 2012, 4:15 PM CDT
In force: 23 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Dane County, WI, Jefferson County, WI

The radar

The Milwaukee radar (KMKX), 32 km from the middle of the area, began a volume at 20:52 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 3, 1:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.9 hours before the alert went out and 172 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: 321 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 565 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

287 
WUUS53 KMKX 032052 RRA
SVRMKX
WIC025-055-032115-
/O.NEW.KMKX.SV.W.0013.120503T2052Z-120503T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
352 PM CDT THU MAY 3 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL DANE COUNTY IN SOUTH CENTRAL WISCONSIN...
  CENTRAL JEFFERSON COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL 415 PM CDT

* AT 347 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR DEERFIELD...OR 7 MILES NORTHEAST OF
  STOUGHTON...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LAKE MILLS...JEFFERSON...FORT ATKINSON...DEERFIELD...CAMBRIDGE...
  LAKE RIPLEY...JOHNSON CREEK...ROCKDALE AND MILFORD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4316 8875 4291 8875 4296 8917 4309 8921
TIME...MOT...LOC 2052Z 266DEG 26KT 4301 8909
WIND...HAIL <50MPH 1.00IN

$$

BROOKS

1 follow-up statement

476 
WWUS53 KMKX 032103
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
403 PM CDT THU MAY 3 2012

WIC025-055-032115-
/O.CON.KMKX.SV.W.0013.000000T0000Z-120503T2115Z/
DANE WI-JEFFERSON WI-
403 PM CDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
JEFFERSON AND EAST CENTRAL DANE COUNTIES UNTIL 415 PM CDT...

AT 401 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR LAKE RIPLEY...OR 6 MILES SOUTHWEST OF LAKE
MILLS...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  LAKE MILLS...JEFFERSON...FORT ATKINSON...JOHNSON CREEK AND MILFORD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4310 8911 4316 8875 4291 8875 4295 8909
TIME...MOT...LOC 2103Z 266DEG 26KT 4301 8898
WIND...HAIL <50MPH 1.00IN

$$

BROOKS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 2:09 AM CDT	Areal Flood Advisory	MKX	Fond du Lac, Green Lake, Marquette	3 hr
May 3, 8:34 AM CDT	Areal Flood Advisory	MKX	Green Lake, Marquette	3 hr
May 3, 11:41 AM CDT	Small Craft Advisory	MKX		4 hr
May 3, 12:54 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	51 min
May 3, 1:05 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Jefferson	40 min
May 3, 1:29 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson	46 min
May 3, 1:31 PM CDT	Special Marine Warning	MKX		29 min
May 3, 1:41 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Washington	49 min
May 3, 1:53 PM CDT	Special Marine Warning	MKX		37 min
May 3, 2:15 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee, Washington, Waukesha	30 min
May 3, 2:23 PM CDT	Special Marine Warning	MKX		12 min
May 3, 2:29 PM CDT	Special Marine Warning	MKX		31 min
May 3, 2:54 PM CDT	Special Marine Warning	MKX		66 min
May 3, 2:59 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dodge	46 min
May 3, 3:21 PM CDT	Severe Thunderstorm Warning	MKX	Dane	39 min
May 3, 3:52 PM CDT	Severe Thunderstorm Warning	MKX	Dodge	23 min
May 3, 4:10 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	35 min
May 3, 4:17 PM CDT	Special Marine Warning	MKX		43 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012 Every 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.