Special Weather Statement, NWS Green Bay, WI

Area Forecast Discussion
National Weather Service Green Bay WI
301 PM CDT Sun Aug 6 2017

Forecast discussion for routine afternoon forecast issuance

.SHORT TERM...Tonight and Monday
Issued at 301 PM CDT Sun Aug 6 2017

Scattered showers and thunderstorms continued this afternoon south
of a Rhinelander to Iron Mountain line. The stronger storms were
producing wind gusts of 30 to 40 mph along with small hail. The
latest meso analysis page indicated surface base capes of 600 to
800 J/KG.

The scattered thunderstorms should end early this evening with any
shower activity across east-central Wisconsin ending by late
evening as a weak surface boundary drops south across the area.
Later tonight, the combination of clearing skies and light winds
should allow for fog to form, especially north and west of the
Fox Valley. The fog may be locally dense with visibilities of a
quarter of a mile or less in some spots. Did make minor
adjustments to the min temperatures to account for our typical
cold spots.

On Monday, any fog and low clouds should burn off by mid morning.
Mostly sunny skies will prevail the rest of the day with highs in
the 70s. Made minor adjustments to raise high temperatures a
degree or two at most places and to account for our typical
warm bias spots.

.LONG TERM...Monday Night Through Sunday
Issued at 301 PM CDT Sun Aug 6 2017

Dry northwest upper flow is forecast to continue through
at least Tuesday night or early Wednesday. An approaching upper
trough and surface cold front will bring a chance of showers and
thunderstorms across northern WIsconsin Wednesday afternoon and
night. The front then looks it stalls Thursday as the upper flow
becomes westerly. Showers and thunderstorms are a good bet in the
vicinity of the front Thursday and Thursday night, wherever it
may be.

The 12z models continue the trend of not forecasting an intense
upper low and associated surface system next Saturday and Sunday.
They still close off an upper system over the northern Plains, but
it is weaker and moves slowly east across the western Great lakes
Sunday and Monday. It should be accompanied by showers and low top
thunderstorms and cooler than usual temperatures.
&&

.AVIATION...for 18Z TAF Issuance
Issued at 1124 AM CDT Sun Aug 6 2017

Latest satellite images indicated cumulus clouds rapidly
developing this morning. Scattered showers and thunderstorms are
expected across the region this afternoon, especially south of
KRHI to KIMT line. Some of the stronger storms could produce wind
gusts to 35 knots and small hail. The showers and storms should
end around 03z Monday as high pressure builds into the region.
Later tonight, areas of low clouds and fog are expected to develop
across much of the area. The low clouds and fog should burn off by
15z Monday. Fair weather cumulus will develop by late morning on
Monday and continue Monday afternoon.
&&

.GRB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM.....Eckberg
LONG TERM......RDM
AVIATION.......Eckberg

Hazardous Weather Outlook
National Weather Service Green Bay WI
304 PM CDT Sun Aug 6 2017

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-072015-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
304 PM CDT Sun Aug 6 2017

This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.

.DAY ONE...Rest of the Afternoon and Tonight

Scattered thunderstorms will come to an end early this evening.
Some of the storms will still be capable of producing small
hail, wind gusts to around 40 mph and brief heavy rain.

Fog is expected to develop later tonight. The fog may be
locally dense with visibilities at or below one quarter
of a mile, especially north and west of the Fox Valley.

.DAYS TWO THROUGH SEVEN...Monday through Sunday

Thunderstorms are possible at times during the middle and end of
the upcoming week, but conditions do not appear favorable for
severe weather during this period.

.SPOTTER INFORMATION STATEMENT...

Formal spotter activation is not expected for the remainder of
the afternoon or tonight. Spotters are requested to report wind
gusts over 35 mph or any hail.

LMZ521-522-541>543-072015-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
304 PM CDT Sun Aug 6 2017

This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.

.DAY ONE...Tonight

Scattered thunderstorms will come to an end early this evening.
The main hazard with these storms will be gusty winds to around
35 mph and cloud to water lightning strikes.

.DAYS TWO THROUGH SEVEN...Monday through Sunday

Thunderstorms are possible at times during the middle and end of
the upcoming week, but conditions do not appear favorable for
severe weather during this period. The storms may pose a hazard
to boaters on the lake and bay.

Eckberg/RDM

Special Weather Statement
National Weather Service Green Bay WI
130 PM CDT SUN AUG 6 2017

WIZ073-061915-
Southern Marinette County WI-
130 PM CDT SUN AUG 6 2017

...SPECIAL WEATHER STATEMENT...

At 130 PM CDT, Doppler radar was tracking a strong thunderstorm near
Wausaukee, or 18 miles northwest of Menominee, moving southeast at 20
mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Marinette and Menominee around 215 PM CDT.

Other locations impacted by this storm include Porterfield, Middle
Inlet, Lake Noquebay, Mcallister and Loomis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4503 8762 4528 8803 4534 8798 4534 8782
      4535 8781 4535 8775 4537 8773 4534 8765
      4529 8769 4520 8774 4517 8774 4514 8768
      4511 8766 4509 8759 4512 8761 4514 8761
      4513 8754 4512 8754
TIME...MOT...LOC 1830Z 304DEG 17KT 4532 8788

RDM

Special Weather Statement
National Weather Service Green Bay WI
151 PM CDT SUN AUG 6 2017

WIZ022-031-038>040-061930-
Shawano WI-Kewaunee WI-Outagamie WI-Door WI-Brown WI-
151 PM CDT SUN AUG 6 2017

...SPECIAL WEATHER STATEMENT...

At 150 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles north of Bay Shore Park to 7 miles
north of Green Bay to 6 miles southeast of Navarino Wildlife Area.
Movement was southeast at 15 mph.

Pea size hail and winds in excess of 30 mph will be possible with
these storms.

Strong thunderstorms will be near...  Green Bay around 210 PM CDT.
Bay Shore Park around 220 PM CDT. Bellevue Town around 225 PM CDT. 1
Luxemburg around 230 PM CDT.

Other locations impacted by these storms include Slovan, Gregorville,
Rankin, Rose Lawn, Humboldt, Ledgeview, Leo Frigo Bridge, Howard,
Lincoln and Brussels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4464 8737 4443 8771 4441 8833 4465 8859
      4466 8807 4468 8804 4468 8799 4471 8799
      4482 8781 4471 8792 4463 8793 4469 8780
      4479 8771
TIME...MOT...LOC 1850Z 312DEG 12KT 4474 8781 4462 8800 4461 8842

RDM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
211 PM CDT SUN AUG 06 2017

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

0130 PM     HAIL             WAUSAUKEE               45.36N 87.94W
08/06/2017  M0.50 INCH       MARINETTE          WI   TRAINED SPOTTER

            NEAR US 141 AND CEDAR ROAD.

&&

SAC

Special Weather Statement
National Weather Service Green Bay WI
232 PM CDT SUN AUG 6 2017

WIZ073-062030-
Southern Marinette County WI-
232 PM CDT SUN AUG 6 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN MARINETTE COUNTY UNTIL
330 PM CDT...

At 231 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles west of Menominee, moving east at 20 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Marinette around 255 PM CDT.
  Menominee around 300 PM CDT.

Other locations impacted by this storm include Porterfield, Harmony
and Peshtigo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4509 8736 4514 8739 4511 8754 4506 8752
      4494 8759 4492 8755 4492 8751 4490 8752
      4504 8795 4522 8780 4521 8773 4517 8774
      4511 8766 4510 8759 4514 8761 4512 8754
      4518 8743 4516 8731
TIME...MOT...LOC 1931Z 291DEG 16KT 4510 8782

Eckberg

Special Weather Statement
National Weather Service Green Bay WI
420 PM CDT SUN AUG 6 2017

WIZ050-062200-
Manitowoc WI-
420 PM CDT SUN AUG 6 2017

...STRONG THUNDERSTORM MOVING THROUGH MANITOWOC COUNTY...

At 420 PM CDT, Doppler radar was tracking a strong thunderstorm near
Valders, or 7 miles northwest of Manitowoc, moving east at 15 mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Manitowoc around 440 PM CDT.

Other locations impacted by this storm include Reifs Mills, Kellners
Corners, Silver Lake College, Clarks Mills, Whitelaw, Two Rivers,
Branch, Madsen, Clover and Shoto.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4407 8788 4421 8780 4417 8749 4414 8751
      4407 8759 4399 8764
TIME...MOT...LOC 2120Z 283DEG 14KT 4413 8780

Kieckbusch