Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 3, NWS Milwaukee, WI

April 6, 2010Kenosha County, Racine County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 6, 2010, 7:12 AM CDT for Kenosha County, Racine County, Wisconsin. It was in force for 33 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
Apr 6, 2010, 7:12 AM CDT (12:12 UTC)
Expired
Apr 6, 2010, 7:45 AM CDT
In force
33 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Kenosha County, WI, Racine County, WI

The radar

The Milwaukee radar (KMKX), 68 km from the middle of the area, began a volume at 12:13 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 0.2 hours before the alert went out and 203 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, Green Bay/Straub, WI at 12:00Z on 2010-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 12:00Z on 2010-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
849 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

747 
WUUS53 KMKX 061212
SVRMKX
WIC059-101-061245-
/O.NEW.KMKX.SV.W.0003.100406T1212Z-100406T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
712 AM CDT TUE APR 6 2010

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN KENOSHA COUNTY IN SOUTHEAST WISCONSIN...
  EAST CENTRAL RACINE COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL 745 AM CDT

* AT 709 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR KENOSHA AIRPORT...OR NEAR PLEASANT
  PRAIRIE...AND MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RACINE AROUND 725 AM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE ELMWOOD
PARK.

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 4275 8777 4272 8776 4270 8777 4264 8780
      4253 8780 4248 8789 4249 8793 4261 8806
      4279 8776 4278 8775 4277 8775
TIME...MOT...LOC 1212Z 234DEG 37KT 4260 8788
WIND...HAIL <50MPH 1.00IN

$$

DDV
1 follow-up statement
715 
WWUS53 KMKX 061235
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
735 AM CDT TUE APR 6 2010

WIC101-061243-
/O.CAN.KMKX.SV.W.0003.000000T0000Z-100406T1245Z/
RACINE WI-
735 AM CDT TUE APR 6 2010

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL RACINE COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4267 8779 4264 8780 4253 8780 4248 8789
      4249 8793 4261 8806
TIME...MOT...LOC 1233Z 234DEG 37KT 4273 8764

$$

WIC059-061245-
/O.CON.KMKX.SV.W.0003.000000T0000Z-100406T1245Z/
KENOSHA WI-
735 AM CDT TUE APR 6 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
KENOSHA COUNTY UNTIL 745 AM CDT...

AT 730 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS 
STORM WAS LOCATED 5 MILES SOUTHWEST OF PLEASANT PRAIRIE MOVING 
NORTHEAST AT 45 MPH.

THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF EASTERN
KENOSHA 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 4267 8779 4264 8780 4253 8780 4248 8789
      4249 8793 4261 8806
TIME...MOT...LOC 1233Z 234DEG 37KT 4273 8764
WIND...HAIL <50MPH 1.00IN

$$

ZABEL

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Milwaukee, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 6, 4:15 AM CDT, 2 hours 57 minutes earlier.

Area forecast discussion, Apr 6, 4:15 AM CDT, 2 hours 57 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
415 AM CDT TUE APR 6 2010

.SHORT TERM...

TODAY AND TONIGHT...FORECAST CONFIDENCE...MEDIUM

SHOWERS AND THUNDERSTORMS ARE PROBABLE TODAY...LEAVING THE MAIN
CONCERNS THE THREAT FOR SEVERE WEATHER AND HIGH TEMPERATURES. BOTH
OF THESE ISSUES HINGE ON THE MOVEMENT OF THE WARM FRONT THROUGH
THE DAY...CURRENTLY LOCATED ACROSS SRN IA AND NRN IL.
FRONTOGENESIS ALONG AND NORTH OF THE THE WARM FRONT WILL PRODUCE
SHOWERS AND STORMS TODAY...WITH THE FORCING BEST LOCATED ACROSS
THE NW HALF OF THE CWA. BEST SEVERE DYNAMICS WILL GENERALLY BE
ALONG AND SOUTH OF THE WARM FRONT...ALONG WITH THE HIGHEST
MOISTURE CONTENT. THE THREAT FOR SEVERE WEATHER WILL NOT BE
CONFINED SOUTH OF THE FRONT THOUGH. GFS MIXED LAYER CAPE VALUES
RANGE FROM 0-200 J/KG ACROSS THE NORTH TODAY...TO 600-800 J/KG
ACROSS THE SOUTH. SAW DECENT STORMS OVERNIGHT WITH SIMILAR TO
SLIGHTLY LESS VALUES. ADDITIONALLY...LAPSE RATES LOOK A BIT
STEEPER TODAY. THINK THE MAIN THREAT WILL BE ELEVATED STORMS WITH
SEVERE HAIL AND WIND POTENTIAL...THOUGH SOME SURFACE BASED
CONVECTION COULD SNEAK INTO THE SOUTH. NEWEST SPC DAY 1
CONVECTIVE OUTLOOK NOW HAS A SLIGHT RISK FOR SEVERE THUNDERSTORMS
FOR ALL OF THE FORECAST AREA. WILL HAVE TO MONITOR THE NORTHWARD
PROGRESS OF THE WARM FRONT...AS SEVERE THREAT WILL BE LESSENED IF
THE FRONT STAYS FURTHER SOUTH THAN ANTICIPATED...AND GREATER IF
FURTHER NORTH.

TEMPERATURES WILL BE TRICKY TODAY AS WELL...AS HIGHS WILL
GENERALLY BE IN THE 50S TO AROUND 60 NORTH OF THE FRONT AND WILL
BE IN THE 70S SOUTH. CURRENT FORECAST TEMPS ARE BASED ON THE FRONT
JUST GETTING ACROSS THE WI BORDER...STAYING SOUTH OF MILWAUKEE.

SHOWERS AND STORMS WILL CONTINUE THIS EVENING AND TONIGHT...AS THE
LOW MOVES INTO NRN IL. THE THREAT FOR STRONGER STORMS WILL
DIMINISH INTO THE EVENING...WITH THE CHANCE FOR THUNDER
DIMINISHING NORTHWEST TO SOUTHEAST THROUGH THE NIGHT.

WEDNESDAY...FORECAST CONFIDENCE...MEDIUM

RAIN WILL CONTINUE WEDNESDAY AND WEDNESDAY NIGHT ON THE BACK SIDE
OF THE SFC LOW...AS THE UPPER TROUGH DIGS DOWN INTO WISCONSIN.
CHANCE FOR THUNDER LOOKS MINIMAL ON WEDNESDAY...SO JUST HAVE
ISOLATED THUNDER MENTIONED. 1000-500 MB THICKNESS CRASH AS THE
UPPER TROUGH MOVES OVERHEAD...AND WOULD SUGGEST THE POSSIBILITY OF
SOME SNOW MIXING IN. LEFT OUT MENTION FOR NOW...AS BOUNDARY LAYER
APPEARS TO BE JUST MILD ENOUGH TO MAINTAIN RAIN...THOUGH
EVAPORATIVE COOLING MAY PUSH THINGS COLD ENOUGH FOR SOME FLAKES.

.LONG TERM...

THURSDAY THROUGH SATURDAY...FORECAST CONFIDENCE...MEDIUM

OTHER THAN A LINGERING SHOWER OR TWO EARLY THURSDAY...DRIER
WEATHER WILL RETURN FOR THURSDAY AND INTO THE WEEKEND...AS RIDGING
MOVES INTO THE REGION. ADDITIONALLY...TEMPERATURES WILL REBOUND
FROM NEAR NORMAL THURSDAY TO WELL ABOVE NORMAL BY SATURDAY...WITH
LOW TO MID 60S RETURNING...CONTINUING THE RECENT ABOVE AVERAGE
TREND.

&&

.AVIATION...SURFACE LOW CURRENTLY OVER SOUTH CENTRAL NEBRASKA WILL
TRACK ALONG SURFACE WARM FRONT OVER NORTHERN ILLINOIS THROUGHOUT
TUESDAY AND TUESDAY NIGHT. THIS FRONT WILL FOCUS WIDESPREAD RAINFALL
AND OCNL THUNDERSTORMS ALONG AND NORTH OF THE FRONT...WITH HEAVIEST
RAINFALL ACROSS CENTRAL WISCONSIN. A FEW OF THE STORMS MAY BE SEVERE
ON TUESDAY. MVFR CONDITIONS WITH IFR CONDITIONS LIKELY BY 12Z
TUESDAY AND BEYOND AS THUNDERSTORMS EXPECTED TO DEVELOP AND MOVE
ACROSS SOUTHERN WISCONSIN FROM SUNRISE THROUGH MID AFTERNOON. COOL
FLOW OFF LAKE MICHIGAN EARLY TUESDAY WILL RESULT IN LOWER CEILINGS
AND VSBYS NEAR THE LAKE.

&&

.MARINE...A STRONG WARM FRONT SOUTH OF THE AREA TODAY WILL PRODUCE
WIDESPREAD SHOWERS AND THUNDERSTORMS. A FEW STORMS MAY BE SEVERE. AN
ACTIVE PERIOD OF SHOWERS AND STRONG TO SEVERE STORMS ARE EXPECTED
MID MORNING TUESDAY THROUGH TUESDAY NIGHT. A COLD FRONT WILL MOVE
ACROSS THE WATERS TUESDAY NIGHT BRINGING BRISK NORTHERLY WINDS AND
ROUGH WAVES WEDNESDAY AND THURSDAY...DIMINISHING ON FRIDAY.

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...NONE.
LM...NONE.
&&

SHORT/LONG TERM...DDV/07
AVIATION/MARINE...BRUESKE/23
Hazardous weather outlook, Apr 6, 4:44 AM CDT, 2 hours 28 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
444 AM CDT TUE APR 6 2010

WIZ046-047-051-052-056>060-062>072-070945-
MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE-
WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE-
LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA-
444 AM CDT TUE APR 6 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHERN
WISCONSIN TODAY AND TONIGHT. A STRONG WARM FRONT ACROSS NORTHERN ILLINOIS
ASSOCIATED WITH AN APPROACHING LOW PRESSURE SYSTEM WILL FOCUS
SIGNIFICANT RAIN AND NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS
WISCONSIN.

LARGE HAIL...DAMAGING WINDS AND HEAVY RAIN ARE THE MAIN HAZARDS
ACROSS CENTRAL AND SOUTHERN WISCONSIN. AN ISOLATED TORNADO IS ALSO
POSSIBLE.

LOCALIZED FLOODING IS ALSO POSSIBLE. MOST LARGER RIVER SYSTEMS
SHOULD ONLY SEE LIGHT TO MODERATE RISES...BUT SOME SMALL RIVERS
AND STREAMS WILL SEE FASTER RISES AND MAY EVEN EXCEED FLOOD STAGE
FOR A TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SHOWERS AND A FEW THUNDERSTORMS WILL CONTINUE INTO WEDNESDAY...BUT
SEVERE STORMS ARE NOT EXPECTED ON WEDNESDAY.

NO HAZARDOUS WEATHER IS EXPECTED THURSDAY THROUGH MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY.

LMZ643>646-070945-
SHEBOYGAN TO PORT WASHINGTON WI-
PORT WASHINGTON TO NORTH POINT LIGHT WI-
NORTH POINT LIGHT TO WIND POINT WI-
WIND POINT WI TO WINTHROP HARBOR IL-
444 AM CDT TUE APR 6 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE EXPECTED...A FEW MAY BE SEVERE...ESPECIALLY
SOUTH OF PORT WASHINGTON.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THUNDERSTORMS ARE EXPECTED EARLY WEDNESDAY.

SMALL CRAFT ADVISORY CONDITIONS MAY BE MET WEDNESDAY NIGHT
THROUGH THURSDAY...AS STRONG NORTHERLY WINDS BEHIND A COLD FRONTAL
PASSAGE CREATE WAVES ABOVE 4 FEET.

WWW.WEATHER.GOV/MKX

BRUESKE

In the hours before

Special weather statement, Apr 6, 6:25 AM CDT, 47 minutes before
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Special weather statement, Apr 6, 7:02 AM CDT, 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
702 AM CDT TUE APR 6 2010

WIZ058>060-063>066-068>072-061300-
DANE-DODGE-GREEN-JEFFERSON-KENOSHA-MILWAUKEE-OZAUKEE-RACINE-ROCK-
WALWORTH-WASHINGTON-WAUKESHA-
702 AM CDT TUE APR 6 2010

...STRONG THUNDERSTORM MOVING THROUGH SOUTHEAST WISCONSIN...

AT 655 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF STRONG THUNDERSTORMS ACROSS SOUTHEAST WISCONSIN...MOVING
NORTHEAST AT 45 MPH.

PENNY SIZE HAIL...WINDS GREATER THAN 30 MPH...OCCASIONAL CLOUD TO
GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE
STORMS.

* THE STRONG STORMS WILL CONTINUE OVER AN AREA FROM DANE AND ROCK
COUNTIES EAST TO WAUKESHA AND AND WALWORTH COUNTIES. THESE STORMS
WILL CONTINUE NORTHEAST INTO THE LAKESHORE COUNTIES BY 730 AM.

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED.

DDV

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 5, 9:53 PM CDTSpecial Marine WarningMKX67 min
Apr 5, 11:03 PM CDTSevere Thunderstorm WarningMKXLafayette42 min
Apr 5, 11:28 PM CDTSevere Thunderstorm WarningMKXGreen47 min
Apr 6, 7:17 AM CDTSpecial Marine WarningMKX88 min
Apr 6, 7:33 AM CDTSpecial Marine WarningMKX57 min
Apr 6, 10:02 AM CDTRiver Flood WatchMKXRacine5 hr
Apr 6, 10:02 AM CDTRiver Flood WatchMKXGreen, Rock23 hr
Apr 6, 10:02 AM CDTRiver Flood WatchMKXIowa, Lafayette23 hr
Apr 6, 10:02 AM CDTRiver Flood WatchMKXGreen23 hr
Apr 6, 10:40 AM CDTRiver Flood WarningMKXKenosha6 days
Apr 6, 2:51 PM CDTRiver Flood WarningMKXRacine14 hr
Apr 6, 6:43 PM CDTSevere Thunderstorm WarningMKXIowa, Sauk47 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2010Every severe thunderstorm warning in 2010

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.