A line of strong thunderstorms caused a brief period of strong gusty winds over a part of the nearshore waters of Lake Michigan around Sheboygan.
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The episode as NWS MKX wrote it up.
A line of strong thunderstorms caused a brief period of strong gusty winds over a part of the nearshore waters of Lake Michigan around Sheboygan.
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 Milwaukee, WI wrote its last area forecast discussion before the first event at Aug 6, 7:53 PM CST, 4 hours 53 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 853 PM CDT TUE AUG 6 2013 .UPDATE... THUNDERSTORMS ACROSS EAST CENTRAL MN AND NORTHWEST WISCONSIN ARE TRYING TO ORGANIZE INTO A LARGER LINE COMPLEX. THE BEST AXIS OF MOISTURE AND INSTABILITY LOOKS TO BE OVER WESTERN WISCONSIN...INTO SOUTHERN WISCONSIN. DEVELOPMENT ON THE SOUTHWEST FLANK HAS STRUGGLED TO EXPAND FARTHER SOUTHWEST. THE HRRR HAS BEEN VERY CONSISTENT WITH ITS HOURLY UPDATES IN BRINGING A LINE OF STORMS THROUGH HERE BETWEEN ABOUT 1 AND 4 AM...HITTING MOST OF THE FORECAST AREA. THE STORMS COULD BE WEAKENING BY THE TIME THEY REACH THE SOUTHEAST...BUT IF THIS THING GETS BETTER ORGANIZED WITH GOOD COLD POOL DYNAMICS...IT WILL LIVE ON LONGER. THE MAIN THREAT WILL BE STRONG STRAIGHT LINE WINDS AND LARGE HAIL. CURRENT TIMING HAS IT ENTERING MARQUETTE...GREEN LAKE...SAUK COUNTIES BETWEEN MIDNIGHT AND 1 AM...EXITING THE SOUTHEAST BY AROUND 4 AM. THE LINE SHOULD BEGIN TO ACCELERATE ONCE IT BECOMES BETTER ORGANIZED...SO CURRENT MOVEMENT ISN/T AN ACCURATE EXTRAPOLATION. && .AVIATION/06Z TAFS/... VFR CONDITIONS ARE GENERALLY EXPECTED THROUGH THE PERIOD. A LINE OF STRONG THUNDERSTORMS WILL MOVE THROUGH THE AREA BETWEEN MIDNIGHT AND 4 AM. THEY SHOULD REACH MADISON BY 2 AM AND MILWAUKEE/KENOSHA AROUND 4 AM. BRIEF MVFR CONDITIONS ARE LIKELY WITH THE THUNDERSTORMS...ALONG WITH STRONG AND GUSTY NORTHWEST WINDS FROM THE STORMS. PRESSURE GRADIENT WINDS WILL BE SOUTHWEST UNTIL FRONTAL PASSAGE EARLY WEDNESDAY AFTERNOON. && .PREV DISCUSSION... /ISSUED 345 PM CDT TUE AUG 6 2013/ VERY SHORT TERM...TONIGHT AND WEDNESDAY. IT SHOULD BE STAY DRY THROUGH EARLY EVENING...WITH SHOWERS/STORMS FOCUSING WEST CLOSER TO AN APPROACHING COLD FRONT. AS THE FRONT APPROACHES...THE ACTIVITY WILL LIKELY MOVE INTO THE FORECAST AREA LATE EVENING INTO TONIGHT. CURRENT THINKING IS THAT THE BEST CHANCE FOR STORMS WILL BE FROM 10 PM TO 4 AM. THE BIG QUESTIONS REMAIN HOW MUCH OF THE CONVECTION WILL SURVIVE AND IF ANY STORMS WILL BE SEVERE. STILL LOOKS LIKE THERE COULD BE A GOOD AMOUNT OF INSTABILITY AFTER SUNSET. LATEST SOUNDINGS ARE MORE REASONABLE WITH DEWPOINTS AND ARE INDICATING UPWARDS OF 1000 J/KG CAPE AS THE FRONT APPROACHES. 0-6 KM BULK SHEAR WILL BE IN THE 35-45 KT RANGE...PLENTY TO CONSIDER STRONG TO SEVERE STORMS. THE LATEST UPDATE OF THE SPC DAY 1 CONVECTIVE OUTLOOK PULLED THE SLIGHT RISK OUT OF THE EAST...BUT KEPT IT FOR THE WESTERN TWO THIRDS OF THE FORECAST AREA. THE MAIN THREAT WOULD PROBABLY BE DAMAGING WINDS WITH BOWING LINES. WILL HAVE TO MONITOR UPSTREAM ACTIVITY THIS AFTERNOON AND EVENING TO CONTINUE TO ASSESS STORM TIMING AND THE SEVERE THREAT FOR SOUTHERN WISCONSIN. EXPECTING MAINLY DRY WEATHER BY DAYBREAK WEDNESDAY...WITH A SHOWER OR STORM POSSIBLY LINGERING INTO EARLY MORNING. IT WILL BE DRY MID MORNING THROUGH THE AFTERNOON BEHIND THE DEPARTING FRONT. LOOKS LIKE WARM AIRMASS WILL LINGER LONG ENOUGH FOR NEAR NORMAL TEMPS TOMORROW. SHOULD BE A PRETTY NICE DAY. SHORT TERM...WEDNESDAY NIGHT THROUGH FRIDAY. DRIER AIR AND WEAK HIGH PRESSURE SETTLES IN BEHIND EXITING CDFNT AND LINGERS THROUGH THURSDAY. TEMPERATURES WILL REMAIN AVERAGING A LITTLE BELOW NORMAL FOR EARLY AUGUST. SHORT TERM GUIDANCE IS IN REASONABLE AGREEMENT ON CARRYING WEAK CDFNT THRU SRN WI THURSDAY NIGHT. LOW PRESSURE MOVING ACROSS SRN CANADA A BIT MORE AMPLIFIED THAN DEPICTED BY EARLIER GUIDANCE...HOWEVER MOISTURE REMAINS LIMITED. FOR NOW WL ADD SMALL POPS FOR -SHRA ACROSS NRN CWA LATER THU NIGHT AS LITTLE INSTABILITY SEEN ON FORECAST SOUNDINGS AT THIS TIME. SLIGHTLY MORE ZONAL FLOW ON FRIDAY BUT STILL EXPECT ANY PRECIPITATION THAT DEVELOPS NORTH OF STRONG FRONTAL BOUNDARY TO THE SOUTH SHOULD REMAIN SOUTH OF THE AREA. HOWEVER MAY SEE SOME HIGH CLOUDS AFFECT SRN WI ON FRIDAY. LONG TERM...FRIDAY NIGHT THROUGH TUESDAY. MEDIUM RANGE GUIDANCE HAVING SOME DIFFICULTY IN STRENGTH AND EASTWARD TIMING OF DEEP VORTEX NORTH OF THE GREAT LAKES AT THE START OF THE PERIOD. ECMWF AND GEM SHOWING LESS WEST-NORTHWEST FLOW IN ITS WAKE ACROSS SOUTHERN WI...AND MORE ZONAL FLOW...WHILE GFS HAS TRENDED BACK TO OLDER ECMWF SOLUTIONS. THE MORE ZONAL FLOW OVER THE UPPER MIDWEST AND CENTRAL MS VALLEY REGION WILL ALLOW PRECIP AND CLOUDS FORMING ALONG AND NORTH OF STRONG EAST-WEST FRONTAL BOUNDARY TO INCH CLOSER TO SRN WI. HWVR AT THIS TIME STILL APPEARS DRIER ZONAL FLOW AND SLOW-MOVING WEAK HIGH PRESSURE SHOULD CONTINUE TO BRING DRY WEATHER TO SRN WI FOR THE WEEKEND. UPSTREAM RIDGING ARCING FROM THE SOUTHERN PLAINS ACROSS THE ROCKIES LOOKS TO REMAIN NEARLY STATIONARY INTO EARLY NEXT WEEK. SOME CONSISTENCY IN MEDIUM RANGE GUIDANCE BRINGING SHORT WAVE TROUGH FROM SOUTHERN CANADA ACROSS WI SUN NGT/MON TIME FRAME. SLIGHT INCREASE IN MID-LEVEL MOISTURE AT THIS TIME PER TIME-SECTIONS SO WL CONTINUE SMALL POPS. DRY CONDITIONS RETURN FOR EARLY NEXT WEEK. GFS 5 DAY 5H MEANS CONTINUE TO SHOW HEIGHTS REMAINING SLIGHTLY BELOW NORMAL FOR THE PERIOD...CONTRIBUTING TO DAYTIME TEMPERATURES CONTINUING TO AVERAGE SLIGHTLY BELOW NORMAL. AVIATION /00Z TAFS/...STILL LOOKS LIKE THERE WILL BE SHOWERS/STORMS THIS EVENING AND INTO TONIGHT AS A COLD FRONT APPROACHES. STRONG TO SEVERE STORMS ARE POSSIBLE...WITH DAMAGING WINDS THE MAIN THREAT. THE PRECIP SHOULD WIND DOWN BY EARLY OR MID WEDNESDAY MORNING AS THE COLD FRONT AND LOW PRESSURE HEAD EAST...WITH DRY WEATHER EXPECTED THOUGH THE REMAINDER OF THE DAY. COULD SEE SOME LOWER VSBYS IN STORMS TONIGHT...BUT OTHERWISE SHOULD REMAIN VFR OVERNIGHT. MAY SEE SOME MVFR CIGS FOR A COUPLE HOURS TOMORROW MORNING...BUT WILL LIKELY RETURN TO VFR BY LATE MORNING OR AFTERNOON AS MIXING INCREASES. NOT A LOT OF CONFIDENCE IN THE LOWER CIGS FOR TOMORROW...SO WILL KEEP VFR IN TAFS FOR NOW. && .MKX WATCHES/WARNINGS/ADVISORIES... WI...NONE. LM...NONE. && UPDATE...DAVIS TONIGHT/WEDNESDAY AND AVIATION/MARINE...DDV WEDNESDAY NIGHT THROUGH TUESDAY...MBK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 243 PM CDT TUE AUG 6 2013 WIZ046-047-051-052-056>060-062>072-071945- MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE- WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE- LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA- 243 PM CDT TUE AUG 6 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN. .DAY ONE...TONIGHT A BAND OF THUNDERSTORMS IS EXPECTED TO SWEEP ACROSS SOUTHERN WISCONSIN TONIGHT ALONG AND AHEAD OF A COLD FRONT. THERE IS A SLIGHT RISK THAT THE THUNDERSTORMS COULD TURN SEVERE...PRODUCING DAMAGING WIND GUSTS AND LARGE HAIL. THE SLIGHT RISK AREA IS MAINLY ALONG AND WEST OF A LINE FROM FOND DU LAC TO BELOIT. THE TIMING FOR THE THUNDERSTORMS LOOKS BEST BETWEEN 10 PM CDT AND 4 AM CDT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY THERE IS A SMALL CHANCE FOR THUNDERSTORMS WEDNESDAY MORNING ACROSS SOUTHEAST WISCONSIN...AS THE COLD FRONT EXITS THE AREA. THERE IS ALSO A SMALL CHANCE FOR THUNDERSTORMS NEXT SUNDAY NIGHT AND MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT OVER SOUTH CENTRAL WISCONSIN. LMZ643>646-071945- 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- 243 PM CDT TUE AUG 6 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN. .DAY ONE...TONIGHT A BAND OF THUNDERSTORMS IS EXPECTED TO AFFECT THE NEARSHORE WATERS OF LAKE MICHIGAN BETWEEN 11 PM CDT AND 5 AM CDT. SOME OF THE THUNDERSTORMS COULD BE STRONG...PRODUCING DAMAGING WIND GUSTS AND HAIL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS WEDNESDAY MORNING...AS A COLD FRONT EXITS THE AREA. NORTHWEST WIND GUSTS WILL APPROACH SMALL CRAFT ADVISORY LEVELS ON FRIDAY. THERE IS ALSO A SMALL CHANCE FOR THUNDERSTORMS SUNDAY NIGHT INTO MONDAY. WWW.WEATHER.GOV/MKX MBK
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1139 PM CDT TUE AUG 6 2013 WIZ046-047-057-070530- COLUMBIA-GREEN LAKE-MARQUETTE- 1139 PM CDT TUE AUG 6 2013 ...STRONG THUNDERSTORM MOVING TOWARD MARQUETTE AND GREEN LAKE COUNTIES... AT 1134 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS 59 MILES WEST OF BERLIN...MOVING SOUTHEAST AT 60 MPH. IF THE STORMS MAINTAIN THEIR STRENGTH THEY WILL BRING WINDS UP TO 60 MPH...BRIEF HEAVY DOWNPOURS. * THE THUNDERSTORM WILL BE NEAR... WESTFIELD BY 1205 AM CDT... MONTELLO BY 1215 AM CDT... 6 MILES SOUTHWEST OF PRINCETON BY 1225 AM CDT... MARKESAN BY 1230 AM CDT... GUSTY WINDS MAY CAUSE BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. DAVIS
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</html>The Green Bay radar (KGRB), 90 km away, was scanning. The volume nearest the first event began at 06:46 UTC.
1 marine thunderstorm wind. Local standard time, as filed.
Line of thunderstorms caused wind gust of 38 knots at Sheboygan lakeshore station.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Michigan in 2013Every state in 2013This day in weather history
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 2026-10-01. Each event’s entry at NCEI: 459063.