Severe Thunderstorm Warning 14, NWS Milwaukee, WI

750 
WWUS53 KMKX 070557
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
1157 PM CST MON MAR 6 2017

WIC055-105-127-070615-
/O.CON.KMKX.SV.W.0014.000000T0000Z-170307T0615Z/
Walworth WI-Rock WI-Jefferson WI-
1157 PM CST MON MAR 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CST
FOR WESTERN WALWORTH...EASTERN ROCK AND SOUTHERN JEFFERSON
COUNTIES...

At 1157 PM CST, severe thunderstorms were located along a line
extending from near Lake Ripley to Beloit, moving east at 60 mph.

HAZARD...60 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Janesville, Beloit, Whitewater, Fort Atkinson, Elkhorn, Delavan,
Jefferson, Milton, Williams Bay, Walworth, Clinton, Palmyra,
Fontana-On-Geneva Lake, Sharon, Darien, Lake Ripley, Lake Koshkonong,
Richmond, Rome and La Grange.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4250 8910 4285 8905 4285 8901 4305 8901
      4306 8854 4249 8854
TIME...MOT...LOC 0557Z 250DEG 52KT 4298 8895 4254 8905 

HAIL...0.75IN
WIND...60MPH
 
$$

SPM

694 
WWUS53 KMKX 070603
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
1203 AM CST TUE MAR 7 2017

WIC055-105-127-070615-
/O.CON.KMKX.SV.W.0014.000000T0000Z-170307T0615Z/
Walworth WI-Rock WI-Jefferson WI-
1203 AM CST TUE MAR 7 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CST
FOR WESTERN WALWORTH...EASTERN ROCK AND SOUTHERN JEFFERSON
COUNTIES...

At 1202 AM CST, severe thunderstorms were located along a line
extending from near Jefferson to near Beloit, moving east at 60 mph.

HAZARD...60 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Janesville, Beloit, Whitewater, Fort Atkinson, Elkhorn, Delavan,
Jefferson, Milton, Williams Bay, Walworth, Clinton, Palmyra,
Fontana-On-Geneva Lake, Sharon, Darien, Lake Koshkonong, Richmond,
Rome, La Grange and Hebron.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4250 8902 4279 8897 4300 8893 4305 8886
      4306 8854 4249 8854
TIME...MOT...LOC 0602Z 250DEG 52KT 4300 8886 4256 8896 

HAIL...0.75IN
WIND...60MPH
 
$$

SPM

111 
WWUS53 KMKX 070611
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
1211 AM CST TUE MAR 7 2017

WIC055-105-127-070619-
/O.EXP.KMKX.SV.W.0014.000000T0000Z-170307T0615Z/
Walworth WI-Rock WI-Jefferson WI-
1211 AM CST TUE MAR 7 2017

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN WALWORTH...EASTERN
ROCK AND SOUTHERN JEFFERSON COUNTIES WILL EXPIRE AT 1215 AM CST...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds up to 50 MPH are still possible with these thunderstorms.

A severe thunderstorm watch remains in effect until 500 AM CST for
south central and southeastern Wisconsin.

LAT...LON 4250 8902 4279 8897 4300 8893 4305 8886
      4306 8854 4249 8854
TIME...MOT...LOC 0609Z 250DEG 52KT 4303 8873 4259 8883 

$$

SPM

Area Forecast Discussion...UPDATED
National Weather Service Milwaukee/Sullivan WI
1144 PM CST Mon Mar 6 2017

.UPDATE...

Storms still continuing strong across south-central forecast area,
while looking weaker in the north. Severe watch was extended
eastward across the forecast area due to persistent strength of
storms. Environment certainly still supports severe threat, as
strong wind shear persists and temps/dewpoints continue to be very
mild for this time of year and this time of night. In fact,
Milwaukee just tied the record high for the day as of 11 pm!

Still looks like storms will exit the east around 2-3 am.

&&

.AVIATION/06Z TAFS/...

Storms continue to push eastward across the forecast area. The
strongest storms are currently south of Madison, with weaker
looking storms to the north. Strong winds are the primary threat
of severe weather and Monroe just recently recorded at 50 knot
gust. Storms will exit the east by 8-9Z.

VFR will return behind the storms as clouds clear out.

Will see near 30 knots of shear from the surface to 2 kft this
evening into tonight. Surface winds seem strong and gusty enough
though to leave out mention of wind shear in TAFs.

Mostly sunny and windy conditions are expected on Tuesday.

&&

.PREV DISCUSSION... /Issued 1004 PM CST Mon Mar 6 2017/

UPDATE...

Storms are just now arriving in the western forecast area. Still
looks like the west has the best shot to see a few severe storms,
as meso models are trending weaker convection farther east. Temps
and dewpoints continue to slowly inch up though and shear remains
solid, so isolated severe threat could continue eastward. Will be
monitoring radar trends to consider expanding the watch later.

Storms should exit the east by 2-3 am, with cooling temps and clearing
skies behind the storms.

AVIATION/00Z TAFS/...

Storms are just now arriving in the western forecast area. Could
see a few severe storms, especially toward the western forecast
area. Strong winds are the primary threat of severe weather.
Storms will exit the east by 8-9Z.

VFR will return behind the storms as clouds clear out.

Will see near 30 knots of shear from the surface to 2 kft this
evening into tonight. Surface winds seem strong and gusty enough
though to leave out mention of wind shear in TAFs.

Mostly sunny and windy conditions are expected on Tuesday.

MARINE...

No changes to the Dense Fog Advisory or Gale Warning at this
time. Winds will become westerly later tonight behind a cold
front. These winds will be breezy, but likely sub gale levels. The
switch to offshore winds will also push the fog out of the area.

Gale Warnings will likely be needed again for Tuesday and
Wednesday as windy conditions are likely between low pressure to
the north and high pressure to the south.

PREV DISCUSSION... /Issued 556 PM CST Mon Mar 6 2017/

UPDATE...

Latest radar trends and mesoscale models suggest the storms might
be slowing down a tad, possibly coming in an hour later than
previously thought. Will continue to monitor trends and adjust the
forecast as needed. Otherwise, no change with the severe threat
for late evening into tonight.

AVIATION/00Z TAFS/...

Still expecting a line of thunderstorms to move through late this
evening into early tonight. Could see a few severe storms,
especially toward the western forecast area. Strong winds are the
primary threat of severe weather.

Low ceilings will hang around into the evening, but looks like
there could be some improvement west to east during the mid to
late evening hours per upstream observations. Currently seeing
mainly VFR ahead of the line of storms. If VFR conditions don't
return prior to the storms, they will return behind the storms as
clouds clear out.

Will see near 30 knots of shear from the surface to 2 kft this
evening into tonight. Surface winds seem strong and gusty enough
though to leave out mention of wind shear in TAFs.

Mostly sunny and windy conditions are expected on Tuesday.

MARINE...

Issued a Dense Fog Advisory per webcams. Dense fog is due to very
moist conditions for this time of the year over the chilly waters.
The fog will likely stick around until later tonight when winds
become offshore and a drier airmass begins to move in.

PREV DISCUSSION... /Issued 318 PM CST Mon Mar 6 2017/

TODAY AND TONIGHT...Forecast Confidence High.
A developing low pressure system is centered over the High
Plains with a warm front extending east across northern WI and a
cold front extending to the SW. Southern Wisconsin has been within
strong warm air and moisture advection throughout the day,
beneath overcast skies.

The low pressure system will continue to intensify as it moves to
the northeast. The deepening of the low will serve to enhance an
already strong pressure gradient across the region. As such, wind
shear vectors will also be quite strong as the potent cold front
extending from the low swings though southern Wisconsin late this
evening. The strong forcing, sufficient moisture, and modest
instability will be enough to initiate a line of thunderstorms this
evening. Guidance came in a bit slower with the fropa than in
previous runs, so slowed the timing of the most intense
precipitation.

Given the magnitude of the 0-6km (50kts) and 0-1km (50kts) shear
vectors, the potential for severe weather exists as the front
traverses the area. However, by the time storms arrive in southern
WI, the already limited instability will be depleted due to the
loss of diurnal heating. However, the strong forcing, shear, and
moisture are enough to warrant the slight risk in the far SW CWA and
marginal risk across much of the rest of southern Wisconsin.

TUESDAY THROUGH WEDNESDAY...Forecast confidence is high.

Strong gradient winds are expected through Wednesday, with a
diurnal lull Tuesday night. The deep surface cyclone lifting north
toward Hudson Bay, Canada, combined with ridging to the southwest,
will keep us in a tight gradient for a couple of days. Soundings
still show impressively deep mixing on Tuesday, potentially up to
10-12kft. We should see peak winds around mid afternoon. Winds
aloft are much stronger on Wednesday, though we only mix to 5kft,
but this will still potentially mix winds of 40-43kts from late
morning into the afternoon. Will hoist a wind advisory for Tuesday
alone at this point, with the expectation another one will be
needed for Wednesday.

THURSDAY...Forecast confidence is medium.

The GFS and the ECMWF are looking fairly dry for Thursday, but
there is an area of warm advection associated with a very weak mid
level trough that swipes by and they do suggest some light qpf
potential, mainly during the afternoon. The Canadian-GEM is likely
overreacting and generating quite a bit of precip.

FRIDAY AND SATURDAY...Forecast confidence is medium.

There continues to be model uncertainty with low pressure
development over the central/northern plains that dives southeast
with time, eventually tracking well south of Wisconsin. We could
see some light snow arrive Friday afternoon through Saturday
afternoon with some light snow accumulations. Temps will be close
to thresholds and could mix for a time with rain during the peak
warmth of the afternoons. This doesn't look like it will have any
big impact at this point.

SUNDAY...Forecast confidence is medium.

High pressure should return and bring dry weather for the end of
the weekend.

AVIATION/18Z TAFS/...
Primary concerns are thunder timing and low level wind shear this
evening. Slowed down thunder timing overnight per high res
guidance. Around the time the storms come though, winds at 2kft
ramp up to around 50 kts. I am expecting gusts at the surface to
be around 30kts as the storms come though, so chose to leave llws
out of TAFs at this time.

MARINE...
Strong winds will continue over Lake Michigan this evening and
tonight as a cold front swings through southern Wisconsin. Gusts
should be just above gale force criteria. Winds will swing around
to the southwest and calm somewhat after the frontal passage. Then
very deep mixing and continued strong gradient flow will
reintensify winds Tuesday and Wednesday. Certainly a SCA, and
potentially another Gale Warning will be required each of those
days.

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Wind Advisory from 8 AM to 6 PM CST Tuesday for WIZ046-047-051-
     052-056>060-062>072.

LM...Dense Fog Advisory until 3 AM CST Tuesday for LMZ643>646.

     Gale Warning until 3 AM CST Tuesday for LMZ643>646.

&&

UPDATE...DDV
TONIGHT/Tuesday AND AVIATION/MARINE...BSH
Tuesday NIGHT THROUGH Tuesday...Davis

Hazardous Weather Outlook...Updated
National Weather Service Milwaukee/Sullivan WI
1007 PM CST Mon Mar 6 2017

WIZ046-047-051-052-056>060-062>072-072130-
Marquette-Green Lake-Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
1007 PM CST Mon Mar 6 2017

This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin, and southeast Wisconsin.

.DAY ONE...Tonight

A cold front will bring widespread showers and scattered
thunderstorms to southern Wisconsin tonight. There is a marginal to
slight risk for severe thunderstorms across the southwest two-thirds
of the forecast area. A Severe Thunderstorm Watch is in effect for
western portions of the forecast area until 2 am. Strong and
damaging straight-line winds are the main threat.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

Windy conditions will then prevail in the wake of the cold front
for Tuesday and Wednesday. West to southwest winds will gust to
35 to 45 mph. A wind advisory is in effect for Tuesday and will
likely be needed for Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed this evening into tonight.

LMZ643>646-072130-
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-
1007 PM CST Mon Mar 6 2017

This Hazardous Weather Outlook is for portions of Lake Michigan.

.DAY ONE...Tonight

A Gale Warning is in effect until 3 AM tonight. Breezy south
winds will prevail overnight with gale force southerly wind gusts
expected. A cold frontal passage will then occur after midnight
with brisk westerly winds afterward. Scattered thunderstorms are
expected tonight.

Moist conditions for this time of the year over the chilly waters of
Lake Michigan will result in areas of dense fog into late tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

Brisk westerly winds will continue Tuesday and Wednesday. Gale
force wind gusts are possible during this time.

DDV

www.weather.gov/mkx

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1048 PM CST MON MAR 6 2017

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

1035 PM     NON-TSTM WND GST 3 SE LINDEN             42.89N 90.24W
03/06/2017  M62 MPH          IOWA               WI   AWOS

            AWOS STATION MINERAL POINT /MRJ/.

&&

WOOD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1054 PM CST MON MAR 6 2017

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

1051 PM     TSTM WND DMG     1 N LA VALLE            43.60N 90.13W
03/06/2017                   SAUK               WI   LAW ENFORCEMENT

            POWER LINES DOWN NORTH OF LA VALLE.

&&

WOOD

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1128 PM CST MON MAR 6 2017

WIZ056-057-062-063-070615-
Columbia-Iowa-Sauk-Dane-
1128 PM CST MON MAR 6 2017

...GUSTY WINDS WILL AFFECT EASTERN IOWA...COLUMBIA...SAUK AND
NORTHERN DANE COUNTIES...

At 1126 PM CST, strong winds continue behind a line of severe
thunderstorms. Expect gusts of 40 to 50 mph for a brief time after
the thunderstorms have passed.

Locations impacted include...
Western Madison, Sun Prairie, Middleton, Waunakee, Baraboo, Portage,
Reedsburg, Mount Horeb, Windsor, Columbus, Prairie Du Sac, Sauk City,
Wisconsin Dells, Lake Wisconsin, Deforest, Cross Plains, Lodi, Lake
Delton, Poynette and Pardeeville.

LAT...LON 4363 9007 4364 8958 4344 8902 4329 8901
      4281 8996 4282 9010
TIME...MOT...LOC 0526Z 226DEG 68KT 4317 8994

SPM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1129 PM CST MON MAR 6 2017

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

1125 PM     TSTM WND GST     3 ENE MONROE            42.62N 89.59W
03/06/2017  M58 MPH          GREEN              WI   AWOS

            MONROE AIRPORT AWOS.

&&

WOOD

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1140 PM CST MON MAR 6 2017

WIZ046-047-051-057-058-070630-
Dodge-Columbia-Marquette-Green Lake-Fond Du Lac-
1140 PM CST MON MAR 6 2017

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN FOND DU
LAC...GREEN LAKE...NORTHEASTERN COLUMBIA...MARQUETTE AND NORTHWESTERN
DODGE COUNTIES...

At 1140 PM CST, strong thunderstorms were clustered near Princeton,
or 17 miles southwest of Berlin, moving northeast at 55 mph.

Winds in excess of 40 mph and pea size hail are possible with these
storms.

Locations impacted include...
Ripon, Berlin, Pardeeville, Montello, Markesan, Princeton, Rosendale,
Green Lake, Brandon, Cambria, Fox Lake, Packwaukee, Alto, Manchester,
Endeavor, Neshkoro, Fairwater, Friesland, Kingston and Marquette.

LAT...LON 4390 8888 4389 8854 4344 8901 4364 8964
      4364 8960 4368 8960 4399 8931 4398 8889
TIME...MOT...LOC 0540Z 211DEG 84KT 4380 8920

SPM

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1146 PM CST MON MAR 6 2017

WIZ051-057>059-063>065-070615-
Dodge-Columbia-Waukesha-Washington-Fond Du Lac-Jefferson-Dane-
1146 PM CST MON MAR 6 2017

...STRONG THUNDERSTORMS WILL AFFECT CENTRAL FOND DU LAC...
SOUTHWESTERN WASHINGTON...NORTHERN JEFFERSON AND DODGE COUNTIES...

At 1145 PM CST, a strong thunderstorm was located over Waterloo,
moving northeast at 60 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Watertown, Beaver Dam, Hartford, Waupun, Lake Mills, Mayville,
Columbus, Horicon, Waterloo, Juneau, Johnson Creek, Lomira,
Cambridge, Theresa, Hustisford, Oakfield, Iron Ridge, Lake Ripley,
Burnett and Ixonia.

LAT...LON 4298 8902 4344 8903 4389 8854 4324 8831
TIME...MOT...LOC 0545Z 225DEG 54KT 4320 8899

SPM