Special Weather Statement, NWS Milwaukee, WI

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1041 AM CDT WED JUN 25 2014

.UPDATE...

THE FOG NEAR THE LAKESHORE IS GRADUALLY DISSIPATING...SO ALLOWED THE
DENSE FOG ADVISORY TO EXPIRE AT 9 AM. THERE ARE A FEW STUBBORN AREAS
NEAR THE MILWAUKEE AIRPORT AND KENOSHA AIRPORT...BUT WEBCAMS
CONTINUE TO SHOW IMPROVEMENT.

A SHORTWAVE IS ROLLING ACROSS SOUTHWEST/SOUTH CENTRAL WI LATE THIS
MORNING...RIGHT ALONG THE SURFACE BOUNDARY WHERE THE OVERNIGHT COLD
FRONT STALLED. THERE ARE CLEAR SKIES ACROSS FAR SOUTHWEST WISCONSIN.
CLICKING THROUGH THE SPC MESOANALYSIS PAGE...MANY PARAMETERS
BULLSEYE SOUTHWEST WISCONSIN FOR BEING A FAVORABLE ENVIRONMENT FOR
STRONG THUNDERSTORMS WITH THE POTENTIAL FOR HAIL LATE THIS MORNING.
SURFACE BASED CAPE IS UP TO AROUND 2000 J/KG WITH NO CAP...THERE ARE
30 KNOTS OF BULK SHEAR...STEEP LOW LEVEL LAPSE RATES...850MB AND
500MB WESTERLY WIND MAX... LOW LIFTED INDEX VALUES...AND
CRAVEN/BROOKS SIG SEVERE VALUE OF 25.

THE HRRR AND RAP MODELS SHOW DEVELOPMENT AS EARLY AS NOON OVER THE
SOUTHWEST MKX FORECAST AREA TODAY. SOUTHERN WI WILL STILL BE IN THE
ENTRANCE REGION OF AN UPPER JET BUT UNFORTUNATELY...THE SHORTWAVE
WILL HAVE PASSED TO THE EAST BY THEN AND WE WILL HAVE TO DEPEND ON
CONVERGENCE ALONG THE SURFACE BOUNDARY WITHOUT ADDITIONAL STRONG
SYNOPTIC FORCING. THUS NOT EXPECTING SEVERE STORMS AND WE ARE NOT IN
A SLIGHT RISK FOR SEVERE PER SPC. GUSTY WINDS AND SMALL HAIL ARE
STILL THREATS WITH ANY THUNDERSTORMS THAT DEVELOP.

&&

.AVIATION/18Z TAFS/...

DAYTIME MIXING WILL HELP TO IMPROVE VISIBILITIES LATE THIS MORNING.
THE STUBBORN SITE IS MKE AND I AM HOPEFUL THAT VIS WILL IMPROVE TO
GREATER THAN A HALF MILE AROUND 11 AM. ELSEWHERE...WEBCAMS CONTINUE
TO SHOW IMPROVEMENT.

A SHORTWAVE WILL MOVE THROUGH SOUTHERN WISCONSIN THIS
MORNING...BRINGING A CHANCE FOR SHOWERS AND THUNDERSTORMS. THE BEST
CHANCE FOR PRECIP SHOULD BE NEAR A NW TO SE ORIENTED SFC BOUNDARY
ROUGHLY FROM THE DELLS THROUGH MADISON TO JANESVILLE. THIS SHOULD
FOCUS THE STORMS ACROSS THE SOUTHWEST HALF OF THE FORECAST
AREA...WITH LESSER CHANCES TO THE NORTHEAST.

ANY SHOWERS/STORMS WILL WIND DOWN LATE AFTERNOON INTO THE
EVENING.

EXPECTING FOG AND STRATUS AGAIN NEAR THE LAKE TONIGHT INTO THURSDAY
MORNING...ESPECIALLY FROM MILWAUKEE SOUTH. DRIER CONDITIONS IN THE
LOWER LEVELS MAY DECREASE THE CHANCE FOR THE FOG NORTH OF
THERE COMPARED TO THE LAST COUPLE NIGHTS.

&&

.PREV DISCUSSION... /ISSUED 337 AM CDT WED JUN 25 2014/

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

DENSE FOG IS ONCE AGAIN AN ISSUE IN THE EAST THIS MORNING...WITH
FOGGY CONDITIONS LIKELY PERSISTING A COUPLE HOURS PAST DAYBREAK.
A DENSE FOG ADVISORY WAS THUS ISSUED FOR THE LAKESHORE COUNTIES.
DAYTIME MIXING SHOULD EVENTUALLY RESULT IN IMPROVED VISIBILITIES BY
MID-MORNING. PATCHY FOG IS POSSIBLE ELSEWHERE ACROSS SOUTHERN
WISCONSIN THIS MORNING.

A SHORTWAVE WILL MOVE THROUGH SOUTHERN WISCONSIN THIS
MORNING...BRINGING A CHANCE FOR SHOWERS AND THUNDERSTORMS. THE BEST
CHANCE FOR PRECIP SHOULD BE NEAR A NW TO SE ORIENTED SFC BOUNDARY.
THIS SHOULD FOCUS THE STORMS ACROSS THE SOUTHWEST HALF OF THE
FORECAST AREA...WITH LESSER CHANCES TO THE NORTHEAST. SHOWERS/STORMS
SHOULD WIND DOWN LATE AFTERNOON INTO THE EVENING...WITH JUST A
SLIGHT CHANCE FOR A SHOWER OR TWO IN THE SOUTHWEST LATER IN THE
NIGHT.

925 MB TEMPS WILL BE 3-5C COOLER THAN YESTERDAY...SO SHOULD SEE HIGH
TEMPS MAINLY IN THE 70S...THOUGH A FEW SPOTS COULD CRACK 80 IN THE
SOUTHWEST. PERSISTENT NORTH-NORTHEAST WINDS SHOULD KEEP TEMPS COOLER
CLOSE TO LAKE MICHIGAN...WITH HIGHS LIKELY STRUGGLING IN THE 60S.

COULD SEE SOME FOG AGAIN NEAR THE LAKE TONIGHT INTO THURSDAY
MORNING...BUT DRIER CONDITIONS IN THE LOWER LEVELS MAY DECREASE THE
CHANCE FOR THE FOG COMPARED TO THE LAST COUPLE NIGHTS.

THURSDAY - CONFIDENCE...MEDIUM
MID LEVEL FLOW BECOMES ANTICYCLONIC WITH TIME AS TROUGH SLIDES
EAST. SURFACE HIGH SETTLES ACROSS THE GREAT LAKES. 850/925 THERMAL
TROUGH ACROSS SRN WI. INDICATIONS OF SOME WEAK RETURN WAA INTO SC
WI. WILL JUST GO WITH CHCY SHRA THERE. LIKE THE IDEA OF SWODY2
REMOVING THUNDER SO OPTED TO GO THAT ROUTE AS WELL.

FRIDAY - CONFIDENCE...MEDIUM
BUILDING HEIGHTS THIS PERIOD. THE 00Z ECMWF AND NAM HAVE THE
CLEANER LOOK TO THE VORTICITY PATTERN. OTHER MODELS SHOWING QUITE
A BIT OF CONVECTIVELY INDUCED VORTS RIDING INTO THE RIDGE. 850/925
FLOW INCREASES FROM THE SOUTH SO WARMTH AND MOISTURE ADVECTION
GETS GOING. NOT MUCH IN THE WAY OF FORCING WITH THE BROAD SE LOW
LEVEL FLOW AHEAD OF THE PLAINS LOW. HOWEVER WEAK IMPULSES ALONG
WITH THE UPTICK IN MLCAPE MAY BE ENOUGH TO JUSTIFY THE MODEL
GENERATED QPF. SO WILL HAVE CHCY POPS IN PLACE ESP IN THE WRN AND
CENTRAL CWA.

SATURDAY - CONFIDENCE...MEDIUM
UPPER RIDGE SLIDES SLOWLY EAST ACROSS THE GREAT LAKES WHILE UPPER
TROUGH APPROACHES FROM THE NORTHERN PLAINS. WE GET INTO MORE OF
THE SOUTHWEST FLOW AHEAD OF THIS TROUGH. THE LOW LEVEL JET AXIS
GETS A LITTLE CLOSER BUT IS STILL FURTHER WEST CLOSER TO THE
DYNAMICS OF THE 500 MILLIBAR TROUGH. 925 TEMPS RISE INTO THE LOW
20S CELSIUS...SO WARMER AND MORE HUMID. ANY DIURNALLY DRIVEN
CONVECTION NOT EXPECTED TO BE TOO ORGANIZED WITH BETTER DYNAMICS
STILL TO THE WEST.

SATURDAY NIGHT THROUGH MONDAY NIGHT - CONFIDENCE...MEDIUM
THIS WILL BE THE PERIOD OF GREATEST CONCERN. STRONGER JET STREAM
ENERGY WILL HAVE THE POTENTIAL TO INTERACT WITH A RATHER UNSTABLE
AIRMASS ON A FEW DIFFERENT OCCASIONS. WHILE DETAILS ON CONVECTIVE
TRENDS ARE NOT CERTAIN AT THIS POINT THE PATTERN FAVORS AT LEAST A
COUPLE DIFFERENT CHANCES OF POTENTIALLY STG STORMS DUE TO HIGHER
SHEAR AND CAPE PARAMETERS. IN FACT CWASP REACHES THE 60 TO 70 PCT
RANGE ON A COUPLE OF DIFFERENT OCCASIONS....ESP LATER SUNDAY AND
AGAIN MONDAY.

TUESDAY - CONFIDENCE...MEDIUM
ECMWF HAS SURFACE/850 FRONT TO THE EAST WITH MORE OF A BROAD
CYCLONIC UPPER FLOW. MEANWHILE GFS IS SHOWING A DEEPER POST
FRONTAL UPPER TROUGH WITH LINGERING PRECIP. WILL STICK WITH THE
ALLBLEND POPS AT THIS POINT WHICH ARE IN THE SLIGHT CATEGORY.

AVIATION/12Z TAFS/...DENSE FOG IS ONCE AGAIN AN ISSUE IN THE EAST
THIS MORNING...WITH FOGGY CONDITIONS LIKELY PERSISTING A COUPLE HOURS
PAST DAYBREAK. DAYTIME MIXING SHOULD EVENTUALLY RESULT IN IMPROVED
VISIBILITIES BY MID-MORNING. PATCHY FOG IS POSSIBLE ELSEWHERE ACROSS
SOUTHERN WISCONSIN THIS MORNING.

A SHORTWAVE WILL MOVE THROUGH SOUTHERN WISCONSIN THIS MORNING...BRINGING
A CHANCE FOR SHOWERS AND THUNDERSTORMS. THE BEST CHANCE FOR PRECIP
SHOULD BE NEAR A NW TO SE ORIENTED SFC BOUNDARY. THIS SHOULD FOCUS
THE STORMS ACROSS THE SOUTHWEST HALF OF THE FORECAST AREA...WITH
LESSER CHANCES TO THE NORTHEAST.

SHOWERS/STORMS SHOULD WIND DOWN LATE AFTERNOON INTO THE EVENING...WITH
JUST A SLIGHT CHANCE FOR A SHOWER OR TWO IN THE SOUTHWEST LATER IN
THE NIGHT.

COULD SEE SOME FOG AGAIN NEAR THE LAKE TONIGHT INTO THURSDAY MORNING...
BUT DRIER CONDITIONS IN THE LOWER LEVELS MAY DECREASE THE CHANCE
FOR THE FOG COMPARED TO THE LAST COUPLE NIGHTS.

MARINE...A DENSE FOG ADVISORY REMAINS IN EFFECT ACROSS THE NEAR SHORE
WATERS INTO EARLY THURSDAY MORNING. LIGHT WINDS AND LINGERING LOW
LEVEL MOISTURE OVER THE CHILLY WATERS OF LAKE MICHIGAN WILL LIKELY
RESULT IN CONTINUED FOGGY CONDITIONS.

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...NONE.
LM...DENSE FOG ADVISORY UNTIL 10 AM CDT THURSDAY FOR LMZ643>646.

&&

UPDATE...MRC
TODAY/TONIGHT AND AVIATION/MARINE...DDV
THURSDAY THROUGH TUESDAY...COLLAR

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1021 AM CDT WED JUN 25 2014

WIZ046-047-051-052-056>060-062>072-261530-
MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE-
WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE-
LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA-
1021 AM CDT WED JUN 25 2014

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

.DAY ONE...TODAY AND TONIGHT

AREAS OF FOG MAY OCCUR AT TIMES ALONG LAKE MICHIGAN. DENSE FOG
MAY RETURN NEAR THE LAKE AGAIN TONIGHT.

THERE IS A CHANCE FOR SHOWERS AND THUNDERSTORMS TODAY...AS A
TROUGH OF LOW PRESSURE MOVES THROUGH THE AREA.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

DENSE FOG MAY CONTINUE AT TIMES NEAR THE LAKE MICHIGAN SHORELINE
AREAS THROUGH SATURDAY.

THERE ARE SMALL CHANCES OF THUNDERSTORMS FROM TIME TO TIME
THURSDAY AND FRIDAY...ESPECIALLY SOUTHWEST OF MADISON. BETTER
CHANCES OF THUNDERSTORMS RETURN ACROSS SOUTHERN WISCONSIN FRIDAY
NIGHT THROUGH MONDAY...AS A WARM FRONT MOVES THROUGH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH SUNDAY.

LMZ643>646-261530-
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-
1021 AM CDT WED JUN 25 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN.

.DAY ONE...THIS AFTERNOON AND TONIGHT

DENSE FOG WILL PERSIST ACROSS THE NEARSHORE WATERS TODAY AND
TONIGHT.

THERE IS A CHANCE FOR SHOWERS AND THUNDERSTORMS TODAY...AS A
TROUGH OF LOW PRESSURE MOVES THROUGH THE AREA.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

DENSE FOG MAY REMAIN OVER LAKE MICHIGAN THROUGH THURSDAY
MORNING...AND MAY STILL BE A PROBLEM AT TIMES INTO MONDAY...AS
WARM HUMID AIR RETURNS OVER THE COLD LAKE.

THERE ARE SMALL CHANCES OF THUNDERSTORMS FROM TIME TO TIME
THURSDAY AND FRIDAY. BETTER CHANCES OF THUNDERSTORMS RETURN FRIDAY
NIGHT THROUGH MONDAY...AS A WARM FRONT MOVES THROUGH.

WOOD
WWW.WEATHER.GOV/MKX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
110 PM CDT WED JUN 25 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0106 PM     HAIL             4 W SAUK CITY           43.27N 89.81W
06/25/2014  M1.00 INCH       SAUK               WI   LAW ENFORCEMENT

&&

SMARQUARDT

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
217 PM CDT WED JUN 25 2014

WIZ063-068-069-252000-
DANE-ROCK-GREEN-
217 PM CDT WED JUN 25 2014

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWEST
DANE...FAR NORTHWEST ROCK...AND NORTHEAST GREEN COUNTIES...

AT 216 PM CDT...A STRONG THUNDERSTORM WAS NEAR BELLEVILLE...OR NEAR
VERONA...MOVING SOUTHEAST AT 20 MPH.

WIND GUSTS UP TO 50 MPH AND DIME SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
FITCHBURG...VERONA...OREGON...EVANSVILLE...BELLEVILLE...NEW GLARUS...
BROOKLYN...MONTICELLO...DAYTON...UNION AND PAOLI.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4292 8970 4301 8949 4279 8925 4268 8956
TIME...MOT...LOC 1916Z 329DEG 19KT 4291 8955

WOOD

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