Several bouts of hot weather in August and only near normal precipitation helped to maintain severe drought (D2) conditions in Wood County, Portage County and Waushara County throughout the month and into September 2012. The Fox Valley received a bit more rainfall, helping improve conditions in Winnebago County from severe drought (D2), during the first few weeks of the month, to moderate…
Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
Several bouts of hot weather in August and only near normal precipitation helped to maintain severe drought (D2) conditions in Wood County, Portage County and Waushara County throughout the month and into September 2012. The Fox Valley received a bit more rainfall, helping improve conditions in Winnebago County from severe drought (D2), during the first few weeks of the month, to moderate drought (D1) by the last week of the month.
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 Jul 31, 9:40 PM CST, 2 hours 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 1040 PM CDT TUE JUL 31 2012 UPDATED AVIATION PORTION FOR 06Z TAF ISSUANCE .SHORT TERM...TONIGHT AND WEDNESDAY. SURFACE HIGH PRESSURE WILL MOVE ACROSS WISCONSIN TONIGHT. CU THAT DEVELOPED WITH DAYTIME HEATING SHOULD DISSIPATE AROUND SUNSET AND WINDS WILL BECOME LIGHT. THE LIGHT WINDS...CLEAR SKIES AND DEW POINTS IN THE 50S ARE EXPECTED TO ALLOW TEMPERATURES TO FALL INTO THE 50S ACROSS MOST OF THE AREA OVERNIGHT. DEW POINTS IN THE NORTH WERE ONLY IN THE 50 TO 53 DEGREE RANGE THIS AFTERNOON SO AM A LITTLE CONCERNED THAT MAYBE FORECAST LOWS THERE ARE TOO WARM...BUT WILL GO WITH WHAT I HAVE AND LET THE EVENING SHIFT ADJUST IF NECESSARY. FOG DEVELOPED ACROSS MINNESOTA LAST NIGHT RIGHT UNDER THE CENTER OF THE HIGH. SINCE THE HIGH IS EXPECTED TO BE IN EASTERN WISCONSIN DURING THE NIGHT...HAVE GONE WITH AREAS OF FOG IN THE FORECAST THERE. AN APPROACHING COLD FRONT AND AN UPPER LEVEL SHORT WAVE MOVING EAST ACROSS SOUTHERN CANADA WILL BRING A CHANCE OF SHOWERS TO FAR NORTH CENTRAL WISCONSIN ON WEDNESDAY AFTERNOON. OTHERWISE EXPECT A GENERAL INCREASE IN CLOUDS WITH MUCH WARMER THAN NORMAL TEMPERATURES. .LONG TERM...WEDNESDAY NIGHT THROUGH NEXT TUESDAY. PRIMARY CHALLENGE TO THIS PERIOD IS THE TWO MAIN SHORT WAVE TROUGHS PROGGED TO TRACK OVER THE REGION THIS WEEK. THE FIRST TROUGH IS STILL ON TARGET TO MOVE OVER THE STATE WEDNESDAY NIGHT BEFORE EXITING EASTERN WISCONSIN THURSDAY MORNING. UPPER HEIGHT FALLS ARE NOT PROGGED TO BE AS SIGNIFICANT WITH THIS FIRST TROUGH. A WEAK COLD FRONT WILL BE ASSOCIATED WITH THIS TROUGH AND IS EXPECTED TO LINGER OVER THE SOUTH HALF OF THE STATE. MODEL RUNS BRUSH SOME PCPN OVER SOUTHERN PORTIONS THROUGH THURSDAY AS INSTABILITY LAGGING BEHIND THE FRONT...WILL ADD OR KEEP A SMALL CHANCE OF CONVECTION GOING. AS FAR AS SEVERE POTENTIAL...-20 HEIGHTS REMAIN AROUND 24000 FEET FOR MUCH THIS WEEK...BUT MAIN FORCING WITH THE COLD FRONT EXPECTED TO BE SOUTH OF THE AREA ON THURSDAY. ALTHOUGH THE HEIGHT FALLS ARE NOT AS GREAT COMPARED TO THE MONDAY EVENING SHORT WAVE TROUGH WHICH PRODUCE LARGE HAIL OVER EC WI...AIR MASS RATHER UNSTABLE FOR THIS EVENT. FOR WHAT ITS WORTH MID LEVEL LAPSE RATES FOR THE NAM ARE A BIT STEEPER THAN THE GFS RUN. ANOTHER HAIL EVENT POSSIBLE? WEAK HIGH PRESSURE QUICKLY DRIFTS OVER THE REGION THURSDAY NIGHT INTO FRIDAY IN THE INCREASINGLY WESTERLY FLOW ALOFT...BEFORE THE NEXT SHORT WAVE TROUGH APPROACHES. THIS NEXT SHORT WAVE TROUGH STILL HAS GOOD POTENTIAL OF STRONG TO SEVERE STORMS FOR SATURDAY. THE 12Z GFS AND ECMWF ARE ACTUALLY IN VERY GOOD AGREEMENT WITH THE EVOLUTION OF THIS SYSTEM. RETURN FLOW WAA AND H850 HOT PROD WORKING INTO MINNESOTA FRIDAY AFTERNOON AND MAY BEGIN TO WORK INTO WESTERN WISCONSIN FRIDAY AFTERNOON. THE POTENTIAL OF STRONGER STORMS APPEAR TO BE MAINLY OVER PARTS OF CENTRAL AND NORTH CENTRAL FRIDAY NIGHT AS INITIAL CONVECTION EXPECTED WITH THE WAA AHEAD OF THE SURFACE TROUGH. THEN A SECOND AND LIKELY MORE WIDESPREAD CONVECTION ALONG THE COLD FRONT SATURDAY AFTERNOON INTO SATURDAY NIGHT AS THE UPPER TROUGH SWINGS THROUGH. MAY ADD SMALLER END POPS OVER NORTH TO NORTHEAST WISCONSIN SUNDAY AS THE UPPER TROUGH CONTINUES TO SWING THROUGH...BUT DID NOTE DECENT LAPSE RATES SO LIKELY WILL BE WRAP AROUND CLOUDS BEFORE THE HIGH PRESSURE SETTLES INTO THE AREA SUNDAY THROUGH TUESDAY. && .AVIATION...FOR THE REST OF TONIGHT...SOME PATCHY FOG IS POSSIBLE AT THE TAF SITES. MOST LOCATIONS SHOULD DROP INTO THE MVFR CATEGORY DUE TO RESTRICTIONS TO VISIBILITIES. ON WEDNESDAY... WINDS WILL BECOME SOUTHERLY WITH GUSTS OF 20 TO 25 KNOTS DURING THE MID TO LATE AFTERNOON HOURS. FOR WEDNESDAY EVENING...COLD FRONT WILL MOVE INTO NORTHWEST WISCONSIN. THIS FRONT SHOULD TRIGGER SOME SCATTERED THUNDERSTORMS THAT COULD AFFECT THE TAF SITES WEDNESDAY EVENING. STILL SOME UNCERTAINTY ON HOW CONVECTION WOULD EVOLVE EARLY THURSDAY MORNING INTO THE LATE MORNING HOURS. SOME OF THE STORMS WEDNESDAY EVENING COULD PRODUCE GUSTY WINDS AND HAIL...ALONG WITH LOWER VISIBILITIES DUE TO BRIEF HEAVY RAIN IN THE STORMS. ECKBERG && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 255 PM CDT TUE JUL 31 2012 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-012000- 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- 255 PM CDT TUE JUL 31 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT INTO THURSDAY... AND AGAIN FRIDAY AFTERNOON THROUGH SATURDAY. WHILE ISOLATED STORMS WEDNESDAY NIGHT INTO THURSDAY MAY APPROACH SEVERE LEVELS...THE THUNDERSTORMS AT THE END OF THE WEEK POTENTIALLY COULD BECOME SEVERE IF THE SYSTEM RESPONSIBLE FOR THEM COMES THROUGH DURING PEAK HEATING. LARGE HAIL AND DAMAGING WINDS WOULD BE THE PRIMARY THREATS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. LMZ521-522-541>543-012000- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 255 PM CDT TUE JUL 31 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT INTO THURSDAY... AND AGAIN FRIDAY AFTERNOON THROUGH SATURDAY. WHILE ISOLATED STORMS WEDNESDAY NIGHT MAY APPROACH SEVERE LEVELS...THE THUNDERSTORMS AT THE END OF THE WEEK POTENTIALLY COULD BECOME SEVERE IF THE SYSTEM RESPONSIBLE FOR THEM COMES THROUGH DURING PEAK HEATING. LARGE HAIL AND DAMAGING WINDS WOULD BE THE PRIMARY THREATS. MG/TH
The national radar mosaic for the moment the first event began.
4 drought. Local standard time, as filed.
Severe drought (D2) conditions persisted throughout August and continued into September 2012.
Severe drought (D2) conditions persisted throughout August and continued into September 2012.
Severe drought (D2) conditions persisted throughout August and continued into September 2012.
Rainfall during the month caused conditions to improved from severe drought (D2) to moderate drought (D1) by August 21st.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2012Every state in 2012This day in weather historyWarnings in Wisconsin, August 2012
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: 410037, 410043, 410045, 410046.