Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 78, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 4, 2012, 3:22 PM CDT for Rock County, Walworth County, Wisconsin. It was in force for 38 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
- Aug 4, 2012, 3:22 PM CDT (20:22 UTC)
- Expired
- Aug 4, 2012, 4:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Rock County, WI, Walworth County, WI
The radar
The Milwaukee radar (KMKX), 53 km from the middle of the area, began a volume at 20:23 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 |
|---|---|---|---|
| Aug 4, 1:46 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 8.4 hours before the alert went out and 169 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
- 1247 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
701 WUUS53 KMKX 042022 SVRMKX WIC105-127-042100- /O.NEW.KMKX.SV.W.0078.120804T2022Z-120804T2100Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 322 PM CDT SAT AUG 4 2012 THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN ROCK COUNTY IN SOUTH CENTRAL WISCONSIN... SOUTHERN WALWORTH COUNTY IN SOUTHEAST WISCONSIN... * UNTIL 400 PM CDT * AT 319 PM 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 ROCKTON TO 9 MILES SOUTH OF POPLAR GROVE...AND MOVING NORTHEAST AT 55 MPH. AUTOMATED MEASURING EQUIPMENT AT THE ROCKFORD AIRPORT REPORTED WIND GUSTS OF 55 MPH AT 317 PM WAS REPORTED WITH THESE STORMS. * SEVERE THUNDERSTORMS WILL BE NEAR... BELOIT AROUND 325 PM CDT. JANESVILLE AIRPORT AROUND 330 PM CDT. CLINTON AROUND 335 PM CDT. SHARON AROUND 340 PM CDT. WALWORTH AND DARIEN AROUND 345 PM CDT. WILLIAMS BAY...FONTANA-ON-GENEVA LAKE AND DELAVAN LAKE AROUND 350 PM CDT. PELL LAKE...LAKE GENEVA...GENOA CITY AND COMO AROUND 355 PM CDT. OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE SHOPIERE...TIFFANY...AVALON...ALLENS GROVE...FONTANA...DELAVAN... SPRING PRAIRIE AND SPRINGFIELD. 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 4250 8929 4263 8921 4267 8833 4249 8832 TIME...MOT...LOC 2020Z 244DEG 47KT 4248 8913 4224 8881 WIND...HAIL 70MPH 1.00IN $$ MBK
3 follow-up statements
675 WWUS53 KMKX 042031 SVSMKX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 331 PM CDT SAT AUG 4 2012 WIC105-127-042100- /O.CON.KMKX.SV.W.0078.000000T0000Z-120804T2100Z/ WALWORTH WI-ROCK WI- 331 PM CDT SAT AUG 4 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ROCK AND SOUTHERN WALWORTH COUNTIES UNTIL 400 PM CDT... AT 328 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM BELOIT TO 9 MILES SOUTH OF CAPRON...MOVING NORTHEAST AT 55 MPH. SEVERE THUNDERSTORMS WILL BE NEAR... SHARON AROUND 340 PM CDT. WALWORTH AND DARIEN AROUND 345 PM CDT. WILLIAMS BAY...FONTANA-ON-GENEVA LAKE AND DELAVAN LAKE AROUND 350 PM CDT. PELL LAKE...LAKE GENEVA...GENOA CITY AND COMO AROUND 355 PM CDT. OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE AVALON... ALLENS GROVE...FONTANA...DELAVAN...SPRING PRAIRIE AND SPRINGFIELD. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4250 8929 4263 8921 4267 8833 4249 8832 TIME...MOT...LOC 2031Z 244DEG 47KT 4254 8895 4230 8863 WIND...HAIL 70MPH 1.00IN $$ BROOKS
750 WWUS53 KMKX 042045 SVSMKX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 345 PM CDT SAT AUG 4 2012 WIC105-127-042100- /O.CON.KMKX.SV.W.0078.000000T0000Z-120804T2100Z/ WALWORTH WI-ROCK WI- 345 PM CDT SAT AUG 4 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ROCK AND SOUTHERN WALWORTH COUNTIES UNTIL 400 PM CDT... AT 342 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM DARIEN TO 5 MILES WEST OF WONDER LAKE...MOVING NORTHEAST AT 55 MPH. SEVERE THUNDERSTORMS WILL BE NEAR... WILLIAMS BAY...FONTANA-ON-GENEVA LAKE AND DELAVAN LAKE AROUND 350 PM CDT. PELL LAKE...LAKE GENEVA...GENOA CITY AND COMO AROUND 355 PM CDT. OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE FONTANA... DELAVAN...SPRING PRAIRIE AND SPRINGFIELD. 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 4250 8929 4263 8921 4267 8833 4249 8832 TIME...MOT...LOC 2045Z 244DEG 47KT 4262 8872 4238 8841 WIND...HAIL 60MPH <.75IN $$ BROOKS
711 WWUS53 KMKX 042056 SVSMKX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 356 PM CDT SAT AUG 4 2012 WIC105-127-042106- /O.EXP.KMKX.SV.W.0078.000000T0000Z-120804T2100Z/ WALWORTH WI-ROCK WI- 356 PM CDT SAT AUG 4 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ROCK AND SOUTHERN WALWORTH COUNTIES WILL EXPIRE AT 400 PM CDT... THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND MOVED OUT OF THE WARNED AREA. LAT...LON 4250 8929 4263 8921 4267 8833 4249 8832 TIME...MOT...LOC 2056Z 244DEG 47KT 4268 8854 4244 8823 $$ BROOKS
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 3:21 PM CDT | Special Marine Warning | MKX | 77 min | |
| Aug 4, 3:36 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake | 9 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.