Storms formed across Wisconsin ahead of a cold front. A storm that produced a tornado in Green Lake County moved into Winnebago County and produced a strong wind gust.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GRB wrote it up.
Storms formed across Wisconsin ahead of a cold front. A storm that produced a tornado in Green Lake County moved into Winnebago County and produced a strong wind gust.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Green Bay, WI wrote its last area forecast discussion before the first event at Apr 30, 1:39 PM CST, 4 hours 26 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 239 PM CDT FRI APR 30 2010 .SHORT TERM...TONIGHT/SATURDAY. STORMS ORGANIZED ALONG AND NEAR THE FRONTAL BOUNDARY WORKING TOWARD THE AREA LATE TODAY. SVR CONVECTION DEVELOPING ON NOSE OF H8 MOISTURE WITH SURFACE DEWPOINTS INCREASING IN THE SLY FLOW OVER THE AREA. ONGOING SEVERE AND TOR WATCHES ISSUED EARLIER AND MAINLY ISSUED WITH RESPECT TO SHEARED ENVIRONMENT...UPPER JET OVER THE REGION AND CLEAR SKIES OVER THE REGION. DID ADD A DIMINISHING TREND TO THE FORECAST LATER TONIGHT OVER FAR WESTERN AREAS. EXPECT THE PCPN TO BE SCOURED OUT BY SAT MORNING FOLLOWED BY A BREEZY OR WINDY DAY. EXPECT DECREASING CLOUDS WITH TEMPS RISING TO NEAR NORMAL LEVELS. .LONG TERM...SATURDAY NIGHT THROUGH NEXT FRIDAY. A COUPLE OF PCPN CHCS DURING THIS PERIOD. FIRST IS DURING THE PERIOD SATURDAY NIGHT INTO SUNDAY AS A SURFACE WAVE RIDES ALONG THE FRONTAL BOUNDARY AND INCREASING BAROCLINIC ZONE. HOWEVER OF MORE IMPORTANCE IS THE UPPER COUPLET JET REGION SO WILL INCREASE POPS DURING THIS PERIOD. NAM AND GFS MORE HAVE BECOME MORE AGGRESSIVE WITH THIS FEATURE. FOR THE MONDAY INTO TUESDAY PERIOD..MODELS HAVE BEEN CONSISTENT WITH SLIDING ANOTHER COOL FRONT OVER THE GREAT LAKES REGION FROM THE UPPER LOW DRIFTING OVER THE NORTHERN GREAT LAKES. TIMING IS OF ISSUE BUT APPEARS WEAK. BETTER AGREEMENT WITH A MORE SIG COOL FRONT SLIDING OVER THE AREA AROUND TUESDAY AS THE UPPER JET SAG SOUTH INTO THE REGION. ADDED TSRA TO THE FORECAST FOR THE MENTIONED DYNAMICS. GLANCE AT THE ECMWF SLOWS THIS FRONT DOWN AND ANTICIPATE LATER SHIFTS WILL NEED TO ADJUST THE TIMING OF THIS FEATURE THIS WEEKEND. FLOW BECOMES MORE ZONAL AS THE UPPER SYSTEM DEPARTS TO THE NORTHEAST AND THE SURFACE HIGH BUILDS IN. SOME DIFFERENCE WITH THE MDM RANGE PROGS WITH ANOTHER S/W PASSING OVER LATE NEXT WEEK. THE THE 12Z ECMWF CONSIDERABLY BACKED OFF FROM THE MORE WET 00Z ECMWF SOLUTION FOR THAT PERIOD. && .AVIATION...WIDEPSPREAD CONVECTION WILL AFFECT THE AREA THIS AFTERNOON INTO THIS EVENING BEFORE DIMINISHING LATER TONIGHT FROM WEST TO EAST. WIND GUSTS TO 30 KNOTS POSSIBLE ON SATURDAY. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && RE/TH
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE GREEN BAY WI 139 PM CDT FRI APR 30 2010 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-011845- VILAS-ONEIDA-FOREST-FLORENCE-NORTHERN MARINETTE-LINCOLN-LANGLADE- MENOMINEE-NORTHERN OCONTO-DOOR-MARATHON-SHAWANO-WOOD-PORTAGE- WAUPACA-OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-WINNEBAGO-CALUMET- MANITOWOC-SOUTHERN MARINETTE-SOUTHERN OCONTO- 139 PM CDT FRI APR 30 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...REST OF THIS AFTERNOON AND TONIGHT SEVERE THUNDERSTORMS ARE EXPECTED ACROSS PORTIONS OF CENTRAL... NORTH CENTRAL AND NORTHEAST WISCONSIN FOR THE REMAINDER OF THE AFTERNOON AND EARLY THIS EVENING. DAMAGING WINDS AND LARGE HAIL WILL BE THE MAIN THREAT WITH THESE STORMS. A TORNADO IS ALSO POSSIBLE. SEVERE THUNDERSTORM AND TORNADO WATCHES ARE IN EFFECT FOR MOST OF NORTH CENTRAL AND NORTHEAST WISCONSIN THROUGH EARLY THIS EVENING. GUSTY SOUTHERLY WINDS ARE EXPECTED THIS AFTERNOON ACROSS NORTHEAST WISCONSIN NOT ASSOCIATED WITH THE THUNDERSTORM ACTIVITY. WINDS COULD GUST TO 40 MPH AT A FEW LOCATIONS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY OF HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON AND THIS EVENING. LMZ521-522-541>543-011845- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 139 PM CDT FRI APR 30 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...THIS AFTERNOON AND TONIGHT A SMALL CRAFT ADVISORY IS IN EFFECT...FOR STRONG SOUTHEAST TO SOUTH WINDS AND HIGH WAVES. THUNDERSTORMS WITH STRONG WINDS WILL POSE A THREAT TO BOATERS LATE THIS AFTERNOON INTO TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY STRONG SOUTHWEST WINDS AND HIGH WAVES WILL CREATE PROLONGED CONDITIONS HAZARDOUS TO SMALL CRAFT THROUGH SATURDAY EVENING. ECKBERG
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
323 PM CDT FRI APR 30 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0313 PM TSTM WND GST MARSHFIELD 44.66N 90.16W
04/30/2010 M36 MPH WOOD WI ASOS
&&SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 335 PM CDT FRI APR 30 2010 WIZ005-302145- VILAS- INCLUDING THE CITY OF...EAGLE RIVER 335 PM CDT FRI APR 30 2010 AT 325 PM...DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM IRONWOOD...SOUTHWARD TO NEAR MERRILL TO WISCONSIN RAPIDS. THE LINE OF THUNDERSTORMS WAS MOVING TO THE NORTHEAST AROUND 60 MPH. THE SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS VILAS COUNTY THROUGH 500 PM. SOME OF THE STRONGER STORMS COULD PRODUCE WIND GUSTS TO AROUND 40 MPH...SMALL HAIL AND LOCALLY HEAVY RAIN. STAY TUNED FOR LATER STATEMENTS AND WARNINGS ON THIS LINE OF THUNDERSTORMS IF THEY DO BECOME SEVERE. WIZ030-035-036-302145- MARATHON-WOOD-PORTAGE- INCLUDING THE CITIES OF...WAUSAU...WISCONSIN RAPIDS... STEVENS POINT 335 PM CDT FRI APR 30 2010 AT 325 PM...DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM WESTERN MARATHON COUNTY TO NEAR WISCONSIN RAPIDS. THE LINE OF THUNDERSTORMS WAS MOVING TO THE NORTHEAST AT 60 MPH. THE THUNDERSTORMS WILL ARRIVE IN WAUSAU...MOSINEE...STEVENS POINT BY 345 PM...RINGLE AROUND 350 PM...BEVENT AND HOGARTY AROUND 355 PM. SOME OF THE STRONGER THUNDERSTORMS WILL PRODUCE WIND GUSTS OF 45 TO 50 MPH...SMALL HAIL UP TO A HALF INCH. THIS LINE OF THUNDERSTORM WILL ALSO PRODUCE BRIEF HEAVY RAIN AND CAUSE PONDING OF WATER ON AREA ROAD WAYS. STAY TUNED FOR LATER STATEMENTS AND WARNINGS ON THIS LINE OF THUNDERSTORMS IF THEY DO BECOME SEVERE. WIZ011-012-019-020-031-037-045-302145- FOREST-FLORENCE-LANGLADE-MENOMINEE-SHAWANO-WAUPACA-WAUSHARA- INCLUDING THE CITIES OF...CRANDON...ANTIGO...KESHENA...WAUTOMA 335 PM CDT FRI APR 30 2010 SHOWERS AND THUNDERSTORMS ACROSS THE WESTERN HALF OF WISCONSIN WILL CONTINUE TO OVERSPREAD FOREST...FLORENCE...LANGLADE... MENOMINEE...SHAWANO...WAUPACA AND WAUSHARA COUNTIES THROUGH 530 PM. SOME OF THE STRONGER STORMS COULD PRODUCE GUSTY WINDS... SMALL HAIL AND BRIEF HEAVY RAIN. STAY TUNED FOR LATER STATEMENTS AND WARNINGS ON THIS LINE OF THUNDERSTORMS IF THEY DO BECOME SEVERE. WIZ013-021-022-038>040-048>050-073-074-302145- NORTHERN MARINETTE-NORTHERN OCONTO-DOOR-OUTAGAMIE-BROWN-KEWAUNEE- WINNEBAGO-CALUMET-MANITOWOC-SOUTHERN MARINETTE-SOUTHERN OCONTO- INCLUDING THE CITIES OF...STURGEON BAY...APPLETON...GREEN BAY... ALGOMA...OSHKOSH...CHILTON...TWO RIVERS...CRIVITZ 335 PM CDT FRI APR 30 2010 SHOWERS AND THUNDERSTORMS ACROSS THE WESTERN HALF OF WISCONSIN WILL MOVE INTO MARINETTE...OCONTO...DOOR...OUTAGAMIE...BROWN... KEWAUNEE...WINNEBAGO...CALUMET...MANITOWOC...AND KEWAUNEE COUNTIES BETWEEN 5 PM AND 7 PM. SOME OF THE STRONGER STORMS COULD PRODUCE GUSTY WINDS...SMALL HAIL AND BRIEF HEAVY RAIN. STAY TUNED FOR LATER STATEMENTS AND WARNINGS ON THIS LINE OF THUNDERSTORMS IF THEY DO BECOME SEVERE. ECKBERG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 417 PM CDT FRI APR 30 2010 WIZ005-010>012-018-019-302230- VILAS-ONEIDA-FOREST-FLORENCE-LINCOLN-LANGLADE- INCLUDING THE CITIES OF...EAGLE RIVER...RHINELANDER...CRANDON... TOMAHAWK...ANTIGO 417 PM CDT FRI APR 30 2010 AT 415 PM...SHOWERS AND THUNDERSTORMS WERE MOVING ACROSS VILAS... ONEIDA...FOREST...FLORENCE...LINCOLN AND LANGLADE COUNTIES. SOME OF THE STRONGER STORMS WILL PRODUCE BRIEF HEAVY AND GUSTY WINDS OF 30 TO 40 MPH. THE SHOWERS AND THUNDERSTORMS WERE MOVING TO THE NORTHEAST AROUND 60 MPH. THE SHOWERS AND THUNDERSTORMS SHOULD TAPER OFF TO SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS BY 5 PM ACROSS LINCOLN AND LANGLADE COUNTIES...AND BETWEEN 5 PM AND 630 PM ACROSS VILAS...ONEIDA...FOREST AND FLORENCE COUNTIES. STAY TUNED FOR LATER STATEMENTS AND WARNINGS ON THIS LINE OF THUNDERSTORMS IF THEY DO BECOME SEVERE OVER THE NEXT HOUR OR TWO. WIZ030-035-036-045-302230- MARATHON-WOOD-PORTAGE-WAUSHARA- INCLUDING THE CITIES OF...WAUSAU...WISCONSIN RAPIDS... STEVENS POINT...WAUTOMA 417 PM CDT FRI APR 30 2010 SHOWERS AND THUNDERSTORMS WILL DIMINISH TO SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ACROSS MARATHON...WOOD...PORTAGE...AND WAUSHARA COUNTIES BY 6 PM. WIZ013-020>022-031-037>040-048>050-073-074-302230- NORTHERN MARINETTE-MENOMINEE-NORTHERN OCONTO-DOOR-SHAWANO-WAUPACA- OUTAGAMIE-BROWN-KEWAUNEE-WINNEBAGO-CALUMET-MANITOWOC- SOUTHERN MARINETTE-SOUTHERN OCONTO- INCLUDING THE CITIES OF...KESHENA...STURGEON BAY...APPLETON... GREEN BAY...ALGOMA...OSHKOSH...CHILTON...TWO RIVERS...CRIVITZ 417 PM CDT FRI APR 30 2010 SHOWERS AND THUNDERSTORMS WILL MOVE INTO THE FOX CITIES...GREEN BAY...BRILLION...MANITOWOC AND KEWAUNEE BY 515 PM. THE SHOWERS AND STORMS WILL MOVE INTO DOOR COUNTY BY 6 PM. SOME OF THE STRONGER STORMS COULD PRODUCE GUSTY WINDS...SMALL HAIL AND BRIEF HEAVY RAIN. ECKBERG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 422 PM CDT FRI APR 30 2010 WIZ005-010-302215- ONEIDA-VILAS- 422 PM CDT FRI APR 30 2010 ...STRONG THUNDERSTORM NEAR SAYNER... AT 420 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER CENTRAL VILAS COUNTY...NEAR SAYNER...MOVING NORTHEAST AT 60 MPH. ONE HALF INCH DIAMETER HAIL...WINDS UP TO 50 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. * THE THUNDERSTORM WILL BE NEAR... CONOVER BY 430 PM CDT... LAND O LAKES BY 435 PM CDT... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. EB
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 646 PM CDT FRI APR 30 2010 WIZ045-048-010045- WAUSHARA-WINNEBAGO- 646 PM CDT FRI APR 30 2010 ...SIGNIFICANT WEATHER ADVISORY... AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER GREEN LAKE COUNTY...MOVING NORTHEAST AT 45 MPH. WINDS UP TO 50 MPH...ARE POSSIBLE WITH THIS STORM. * THE THUNDERSTORM WILL BE NEAR... RUSH LAKE BY 710 PM CDT... OMRO BY 720 PM CDT... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. RDM
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 648 PM CDT FRI APR 30 2010 WIZ045-048-010045- WAUSHARA-WINNEBAGO- 648 PM CDT FRI APR 30 2010 ...STRONG THUNDERSTORMS HEADED TOWARDS WINNEBAGO AND EASTERN WAUSHARA COUNTIES... AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER GREEN LAKE COUNTY...MOVING NORTHEAST AT 45 MPH. WINDS UP TO 50 MPH...ARE POSSIBLE WITH THIS STORM. * THE THUNDERSTORM WILL BE NEAR... RUSH LAKE BY 710 PM CDT... OMRO BY 720 PM CDT... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. RDM
The Green Bay radar (KGRB), 83 km away, was scanning. The volume nearest the first event began at 00:06 UTC.
1 thunderstorm wind. Local standard time, as filed.
A couple of trees were blown down near the intersection of Highway 91 and County Road E.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2010Every state in 2010This day in weather historyWarnings in Wisconsin, April 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 218608.