Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 2, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Mar 20, 2011, 7:53 PM CDT for Jefferson County, Wisconsin. It was in force for 18 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
- Mar 20, 2011, 7:53 PM CDT (00:53 UTC)
- Expired
- Mar 20, 2011, 8:11 PM CDT
- In force
- 18 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Jefferson County, WI
The radar
The Milwaukee radar (KMKX), 24 km from the middle of the area, began a volume at 00:53 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.9 hours before the alert went out and 157 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
- 3 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 474 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 380 m²/s²
- 0-3 km storm-relative helicity
- 483 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
008 WUUS53 KMKX 210053 SVRMKX WIC055-210115- /O.NEW.KMKX.SV.W.0002.110321T0053Z-110321T0115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 753 PM CDT SUN MAR 20 2011 THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN JEFFERSON COUNTY IN SOUTHEAST WISCONSIN... * UNTIL 815 PM CDT * AT 749 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR LAKE MILLS...AND MOVING EAST AT 55 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WATERTOWN AIRPORT AND WATERTOWN AROUND 800 PM CDT. OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE PIPERSVILLE AND IXONIA. 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 4319 8855 4308 8855 4305 8899 4319 8900 TIME...MOT...LOC 0053Z 262DEG 50KT 4313 8884 WIND...HAIL <50MPH 1.00IN $$ MBK
2 follow-up statements
114 WWUS53 KMKX 210100 SVSMKX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 800 PM CDT SUN MAR 20 2011 WIC055-210115- /O.CON.KMKX.SV.W.0002.000000T0000Z-110321T0115Z/ JEFFERSON WI- 800 PM CDT SUN MAR 20 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN JEFFERSON COUNTY UNTIL 815 PM CDT... AT 758 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR WATERTOWN AIRPORT...OR NEAR WATERTOWN...MOVING EAST AT 55 MPH. THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTHERN JEFFERSON COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4307 8894 4319 8891 4319 8855 4308 8855 TIME...MOT...LOC 0101Z 262DEG 50KT 4314 8867 WIND...HAIL <50MPH 1.00IN $$ MBK
991 WWUS53 KMKX 210111 SVSMKX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 811 PM CDT SUN MAR 20 2011 WIC055-210120- /O.CAN.KMKX.SV.W.0002.000000T0000Z-110321T0115Z/ JEFFERSON WI- 811 PM CDT SUN MAR 20 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN JEFFERSON COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED INTO NORTHWEST WAUKESHA COUNTY. ANY THUNDERSTORMS THAT AFFECT THE AREA YET THIS EVENING COULD PRODUCE SMALL HAIL UP TO ONE HALF INCH. THE THUNDERSTORMS WILL DIMINISH LATE THIS EVENING. && LAT...LON 4307 8894 4319 8891 4319 8855 4308 8855 TIME...MOT...LOC 0110Z 262DEG 50KT 4316 8852 $$
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 7:09 PM CDT | Severe Thunderstorm Warning | MKX | Green, Rock | 26 min |
| Mar 20, 8:55 PM CDT | River Flood Warning | MKX | Sauk | 8 days |
| Mar 21, 5:06 AM CDT | River Flood Warning | MKX | Sauk | 6 days |
| Mar 21, 3:18 PM CDT | Small Craft Advisory | MKX | 3 days |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2011Every severe thunderstorm warning in 2011
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.