Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 74, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 30, 2012, 11:53 PM CDT for Dane County, Jefferson County, 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 30, 2012, 11:53 PM CDT (04:53 UTC)
- Expired
- Jul 31, 2012, 12:30 AM CDT
- In force
- 37 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Dane County, WI, Jefferson County, WI
The radar
The Milwaukee radar (KMKX), 29 km from the middle of the area, began a volume at 04:55 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 nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 4.9 hours before the alert went out and 213 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.
- Mixed-layer CAPE
- 693 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1937 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
828 WUUS53 KMKX 310453 SVRMKX WIC025-055-310530- /O.NEW.KMKX.SV.W.0074.120731T0453Z-120731T0530Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1153 PM CDT MON JUL 30 2012 THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL DANE COUNTY IN SOUTH CENTRAL WISCONSIN... JEFFERSON COUNTY IN SOUTHEAST WISCONSIN... * UNTIL 1230 AM CDT * AT 1151 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MARSHALL...AND MOVING SOUTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... LAKE MILLS AROUND 1205 AM CDT. JOHNSON CREEK AND JEFFERSON AROUND 1215 AM CDT. OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE MILFORD AND HELENVILLE. 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 4313 8863 4293 8870 4308 8921 4322 8913 TIME...MOT...LOC 0453Z 285DEG 32KT 4312 8903 WIND...HAIL 60MPH 1.00IN $$ DDV
2 follow-up statements
537 WWUS53 KMKX 310504 SVSMKX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1204 AM CDT TUE JUL 31 2012 WIC025-055-310530- /O.CON.KMKX.SV.W.0074.000000T0000Z-120731T0530Z/ DANE WI-JEFFERSON WI- 1204 AM CDT TUE JUL 31 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR JEFFERSON AND EAST CENTRAL DANE COUNTIES UNTIL 1230 AM CDT... AT MIDNIGHT CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR LAKE MILLS...MOVING EAST AT 35 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... JOHNSON CREEK AND JEFFERSON AROUND 1215 AM CDT. OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE MILFORD AND HELENVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4321 8906 4313 8863 4293 8870 4306 8915 TIME...MOT...LOC 0504Z 285DEG 32KT 4309 8890 WIND...HAIL 60MPH 1.00IN $$ BROOKS
682 WWUS53 KMKX 310513 SVSMKX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1213 AM CDT TUE JUL 31 2012 WIC025-310523- /O.CAN.KMKX.SV.W.0074.000000T0000Z-120731T0530Z/ DANE WI- 1213 AM CDT TUE JUL 31 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DANE COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4302 8901 4320 8901 4313 8863 4293 8870 TIME...MOT...LOC 0513Z 285DEG 32KT 4307 8880 $$ WIC055-310530- /O.CON.KMKX.SV.W.0074.000000T0000Z-120731T0530Z/ JEFFERSON WI- 1213 AM CDT TUE JUL 31 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR JEFFERSON COUNTY UNTIL 1230 AM CDT... AT 1210 AM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR JOHNSON CREEK...OR NEAR LAKE MILLS...MOVING EAST AT 35 MPH. THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF JEFFERSON COUNTY...INCLUDING THE FOLLOWING LOCATIONS HELENVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4302 8901 4320 8901 4313 8863 4293 8870 TIME...MOT...LOC 0513Z 285DEG 32KT 4307 8880 WIND...HAIL 60MPH 1.00IN $$ BROOKS
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 10:16 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 29 min |
| Jul 30, 11:05 PM CDT | Special Marine Warning | MKX | 55 min | |
| Jul 31, 12:05 AM CDT | Special Marine Warning | MKX | 55 min | |
| Jul 31, 12:23 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Waukesha | 37 min |
| Jul 31, 12:40 AM CDT | Special Marine Warning | MKX | 110 min | |
| Jul 31, 12:50 AM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Milwaukee, Racine, Walworth, Waukesha | 40 min |
| Jul 31, 1:11 AM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine | 34 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.