Thunderstorms that developed north of a warm front that was across southern Wisconsin, produced heavy rainfall, isolated wind damage and large hail. The heavy rain caused urban and small stream flooding in Winnebago County, around Oshkosh and Neenah.
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.
Thunderstorms that developed north of a warm front that was across southern Wisconsin, produced heavy rainfall, isolated wind damage and large hail. The heavy rain caused urban and small stream flooding in Winnebago County, around Oshkosh and Neenah.
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 12, 11:50 AM CST, 3 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 1250 PM CDT SAT APR 12 2014 UPDATED AVIATION PORTION FOR 18Z TAF ISSUANCE .SHORT TERM...TODAY...TONIGHT...AND SUNDAY ISSUED AT 343 AM CDT SAT APR 12 2014 RAIN WILL CONTINUE TO DEVELOP AND SPREAD INTO THE STATE THIS MORNING DUE TO THE WAA RETURN FLOW ON A 50 KNOT LLJ. RADAR SHOWS THE MAIN BAND OF RAIN ALONG AND NORTH OF THE H850 WARM FRONT LIFTING SPREADING FROM NORTHWEST WISCONSIN EASTWARD INTO THE REST OF NORTHERN WISCONSIN. TSTMS NOTED ALONG A SECOND CLUSTER OF CONVECTION FROM EASTERN SD TO CENTRAL IOWA...WHICH IS NEAR THE SURFACE WARM FRONT AND LOCATION OF DEEPER MOISTURE. ANTICIPATE PCPN WILL BE MORE BANDED AND ON THE LIGHT SIDE DUE TO THE DRY AIRMASS AT THE ONSET. PWATS CLIMB FROM 0.40 EARLY THIS MORNING TO 0.60 ACROSS THE NORTH TO AROUND AN INCH OVER CENTRAL AND EAST CENTRAL WISCONSIN LATE THIS AFTERNOON SO RAIN RATES WILL INCREASE. MORNING TEMPS ACROSS THE FAR NORTH AND NORTHEAST IN THE UPPER 20S TO AROUND 30...WILL CONTINUE THE EARLY MORNING MIX ACROSS THE NORTH UNTIL THE WAA TURNS TO ALL RAIN. UP TO A HALF INCH OF RAIN IS POSSIBLE FOR MOST LOCATIONS TODAY WITH THIS INITIAL PCPN. ANTICIPATE PCPN TO DIMINISH FROM THE NORTHWEST LATE THIS AFTERNOON OR EVENING WITH THE END OF THE WAA. BUT SHOWER ACTIVITY WILL LIKELY LINGER ALONG OR NEAR THE SURFACE AND H8 BOUNDARY STRETCHING FROM FAR EASTERN WISCONSIN TO EASTERN IOWA. RAINFALL AMOUNTS ARE EXPECTED TO BE AROUND A HALF INCH FOR AREAS SOUTHEAST OF A MTW TO OSH LINE BUT THEN GREATLY REDUCED FOR AREAS NORTHWEST OF THIS LINE. THE BOUNDARY OVER THE SOUTHEAST THIRD OF THE STATE WILL REMAIN THE FOCUS OF ADDITIONAL RAINFALL ON SUNDAY AS A BROAD COUPLED UPPER JET PATTERN DEVELOPS DRIFTS OVER THE AREA AND FGEN FORCING INCREASES AS COLDER AIR FROM THE NORTHWEST SAGS INTO THE AREA. A SURFACE WAVE BEGINS TO TRACK OVER NORTHEAST IL OR FAR SOUTHEAST WI ON SUNDAY. GUID MAX TEMPS HAVE TRENDED LOWER TODAY OVER PARTS OF THE NORTH AND NORTHEAST WHICH APPEARS REASONABLE WITH THE LOW SURFACE DEWPOINTS AND RAIN SPREADING INTO THE AREA. .LONG TERM...SUNDAY NIGHT THROUGH FRIDAY ISSUED AT 343 AM CDT SAT APR 12 2014 THE MAIN CONCERNS DURING THIS PART OF THE FORECAST ARE WITH PRECIPITATION DURING THE EARLY PART OF NEXT WEEK...ITS AMOUNT AND TIMING OF THE CHANGEOVER FROM RAIN TO SNOW BEFORE IT ENDS. COLD AIR WRAPPING AROUND A SURFACE LOW PASSING SOUTHEAST OF THE FORECAST AREA WILL CAUSE RAIN TO CHANGE TO SNOW FROM NORTHWEST TO SOUTHEAST ON SUNDAY NIGHT...BEFORE THE PRECIPITATION DEPARTS. MODELS HAD HIGHEST QPF ACROSS THE SOUTHEAST PART OF THE FORECAST AREA WHERE THE CHANGE TO SNOW WILL OCCUR THE LATEST. SNOW TOTALS SHOULD TOP OUT AT NO MORE THAN 2 INCHES SINCE QPF IS LOWER IN THE COLDER AIR...AND LOCATIONS WHERE QPF IS HIGHER WILL TAKE THE LONGEST TO CHANGE TO SNOW. KEPT SOME SNOW ON MONDAY...MAINLY FOR THE EARLY MORNING HOURS...WITH LITTLE OR NO ADDITIONAL ACCUMULATION. LITTLE CONFIDENCE IN WHAT IS GOING TO HAPPEN LATER IN THE WEEK DUE TO SIGNIFICANT DIFFERENCES AMONG THE MODELS. HAVE KEPT WITH THE BLEND OF MODEL SOLUTIONS FOR THE REST OF NEXT WEEK. THIS RESULTED IN SLIGHT CHANCE OR CHANCE POPS FOR PRETTY MUCH EVERY PERIOD DURING THE LATTER HALF OF THE WEEK. TEMPERATURES SHOULD BE BELOW NORMAL THROUGHOUT THE PERIOD...ESPECIALLY ON MONDAY AND TUESDAY. AFTER THAT...THERE SHOULD BE A BIT OF A WARM UP BUT HIGHS WILL STILL BE 5 TO 10 DEGREES BELOW NORMAL. && .AVIATION...FOR 18Z TAF ISSUANCE ISSUED AT 1235 PM CDT SAT APR 12 2014 COMPLEX OF SHOWERS AND FEW THUNDERSTORMS CONTINUE TO MOVE EAST THROUGH CENTRAL AND EAST CENTRAL WI. THIS AREA TO BE EAST OF AREA MID AFTERNOON WITH MORE SCATTERED SHOWERS FOLLOWING. TO THE NORTH BAND OF LIGHT RAIN HAS MOVED TO THE NORTH OF AREA...THOUGH AREA OF MVFR CIGS EXPANDING EAST AND SOUTH THROUGH AREA. MODELS TENDING TO INDICATE SECOND COMPLEX TO DEVELOP OVER EASTERN IOWA BY LATE AFTERNOON...CLIPPING SOUTHERN TAF SITES AS IT MOVES EAST ALONG THE WARM FRONT OVER SOUTHERN WI. CIGS TO CONTINUE TO DETERIORATE OVER AREA WITH IFR CIGS EXPECTED OVERNIGHT. WIND EXPECTED TO KEEP VSBYS FROM GOING BELOW MVFR LEVELS. && .HYDROLOGY... ISSUED AT 416 AM CDT SAT APR 12 2014 CURRENT FCST QPF FOR THE PERIOD FROM TODAY THROUGH SUNDAY EVENING RANGES FROM AROUND A HALF INCH ACROSS NORTH CENTRAL WISCONSIN TO 1 TO 2 INCHES SOUTH OF LINE FROM MARINETTE TO SHAWANO TO WISCONSIN RAPIDS...WITH THE HIGHER ALMOST 2 INCH AMOUNTS OVER WINNEBAGO TO CALUMET TO MANITOWOC COUNTIES. THIS REGION OF OF HIGHER FORECAST RAIN AMOUNTS ALSO OVER AN AREA WHICH LOSS THE SNOW COVER FOR A WHILE NOW AND RIVERS HAVE DROPPED...WHICH IS SIMILAR TO SOUTHERN WISCONSIN WHERE EVEN HIGHER RAINFALL IS ANTICIPATED. ACTUALLY COULD USE SOME RAIN NOW. BUT THIS 1-2 INCHES WILL FALL IN A 36-42 HOUR PERIOD AND MAY HAVE BREAKS IN THE RAIN. FFG NUMBERS ARE AROUND 2 INCHES FOR A 6 HOUR PERIOD OVER PARTS OF THIS REGION. CONSIDERED AN AREAL FLOOD WATCH...BUT CONFIDENCE NOT ENOUGH. LATER SHIFTS MAY NEED TO ADDRESS FLOODING CONCERNS WITH RIVER TYPE STATEMENTS AND POSSIBLY URBAN SMALL STREAM ADVISORIES IF TRAINING STORMS BECOME AN ISSUE. ANTICIPATED RAINFALL OVER THE WISCONSIN RIVER BASIN WILL LIKELY JUST MAINTAIN CURRENT LEVELS THROUGH THIS WEEKEND AND ALREADY HANDLING THIS MINOR FLOODING ISSUE WITH VARIOUS HYDRO STATEMENTS. OVERALL...IF THIS RAINFALL REMAINS SOUTH OF THE LINE MENTIONED ABOVE...WE SHOULD AVOID ANY SIGNIFICANT FLOODING FOR THE WISCONSIN RIVER THIS WEEKEND. COLDER TEMPERATURES THEN ARRIVE FOR THE START OF THE NEW WORK WEEK. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM.....TDH LONG TERM......MG AVIATION.......TE HYDROLOGY......TDH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 507 AM CDT SAT APR 12 2014 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-131100- 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- 507 AM CDT SAT APR 12 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS TODAY AND EVENING. HEAVY RAINFALL AND SMALL HAIL CAN BE EXPECTED WITH THE STRONGER STORMS OVER PARTS OF CENTRAL AND EAST CENTRAL WISCONSIN. RUN OFF FROM MELTING SNOW WILL CONTINUE TO KEEP MANY RIVERS SWOLLEN THIS WEEKEND. A LOW MOVING FRONTAL SYSTEM WILL BRING A PERIOD OF RAIN TO THE AREA THIS WEEKEND WHICH WILL CAUSE ADDITIONAL RUN OFF INTO RIVERS AND STREAMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS POTENTIAL FOR ACCUMULATING SNOW LATE SUNDAY NIGHT INTO EARLY MONDAY MORNING. SNOWFALL ACCUMULATIONS ARE ONLY EXPECTED TO BE 1 TO 2 INCHES IN MOST AREAS...BUT MAY RESULT IN LOCALLY HAZARDOUS TRAVEL CONDITIONS. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO REPORT ANY FLOODING TO THE NATIONAL WEATHER SERVICE IN GREEN BAY. LMZ521-522-541>543-131100- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 507 AM CDT SAT APR 12 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TODAY AND TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NORTH GALES AND HIGH WAVES ARE POSSIBLE SUNDAY NIGHT INTO MONDAY. TH/MG
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
1131 AM CDT SAT APR 12 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1128 AM HEAVY RAIN PLOVER 44.45N 89.53W
04/12/2014 M0.63 INCH PORTAGE WI CO-OP OBSERVER
SOME PONDING IN LOW LYING AREAS AND DITCHES
&&
BERSCHSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 1149 AM CDT SAT APR 12 2014 WIZ020-022-030-031-035>040-045-048>050-074-121900- MENOMINEE-DOOR-MARATHON-SHAWANO-WOOD-PORTAGE-WAUPACA-OUTAGAMIE- BROWN-KEWAUNEE-WAUSHARA-WINNEBAGO-CALUMET-MANITOWOC- SOUTHERN OCONTO- INCLUDING THE CITIES OF...KESHENA...STURGEON BAY...WAUSAU... WISCONSIN RAPIDS...STEVENS POINT...APPLETON...GREEN BAY... ALGOMA...WAUTOMA...OSHKOSH...CHILTON...TWO RIVERS 1149 AM CDT SAT APR 12 2014 ...COOL AND WET WEATHER TO CONTINUE THIS AFTERNOON... A WARM FRONT OVER SOUTHERN WISCONSIN WILL BE THE FOCUS FOR SHOWER ACTIVITY THROUGH THE AFTERNOON HOURS OVER CENTRAL AND EAST CENTRAL WISCONSIN. AN ISOLATED THUNDERSTORM WITH SMALL HAIL IS POSSIBLE MAINLY SOUTH OF A LINE FROM WISCONSIN RAPIDS TO MANITOWOC. WHILE TEMPERATURES SOUTH OF THE FRONT WILL REACH THE 70S AND 80S...MOST AREAS TO THE NORTH WILL ONLY SEE THE 40S AS EAST WINDS OFF LAKE MICHIGAN WILL HELP KEEP TEMPERATURES FROM RISING TOO MUCH. A QUARTER TO A HALF AN INCH OF RAIN HAS ALREADY FALLEN OVER THE CENTRAL AND EAST CENTRAL WISCONSIN THIS MORNING...WITH MUCH THE SAME EXPECTED TO FALL THROUGH THE AFTERNOON HOURS. WATCH FOR PONDING OF WATER ON ROADWAYS AND LOW LYING AREAS. TE
The Green Bay radar (KGRB), 67 km away, was scanning. The volume nearest the first event began at 17:55 UTC.
2 heavy rain, 2 thunderstorm wind, 2 hail. Local standard time, as filed.
Heavy rainfall caused widespread urban flooding in Oshkosh which requiring some streets to be closed.
Thunderstorms with heavy rainfall caused small stream flooding around the intersection of CH-JJ and SH-76 southwest of Neenah.
Thunderstorm winds tipped over a camper, ripped sheet metal roofing from a building, and downed four trees as the storm passed through New Holstein. The time of this event is estimated.
Thunderstorm winds downed numerous trees and power lines between Keil and Cleveland. Winds from the storms also tore the roof from an elementary school in Cleveland and knocked a garage from its foundation just west of Cleveland.
A thunderstorm produced quarter size hail near Pickett.
A thunderstorm produced penny size hail in Oshkosh.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2014Every state in 2014This day in weather historyWarnings in Wisconsin, April 2014
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: 514103, 514485, 511894, 511895, 511892, 511893.