Special Weather Statement, NWS Green Bay, WI

Area Forecast Discussion
National Weather Service Green Bay WI
212 PM CDT Sat Jun 3 2023

Forecast discussion for routine afternoon forecast issuance

.SHORT TERM...Tonight and Sunday
Issued at 212 PM CDT Sat Jun 3 2023

The weather in the short term will look fairly similar to the past
couple of days, as the retrograding ridge aloft inhibits any
major airmass exchanges.

Temperatures this morning rose quickly under sunny skies from the
lower 60s to the lower and mid 80s by this afternoon. This has
brought us to our convective temperatures, producing a cumulus
field over much of north-central to northeastern Wisconsin. The
first few storms have also formed along the Upper Peninsula
border.

The overall storm threat will be similar to the last couple days
as well, relying mainly on surface based heating and instability.
With little in the way of shear or upper support, storms will
likely be slow moving in nature, and fairly pulse-like. The main
initial focal point for convection will be across the north today,
where surface wind fields do show some convergence between winds
off the lake and winds from the Upper Peninsula. Unlike the past
couple of days, surface flow is generally from the east, which
will not favor boundary formation near the lake from a lake
breeze. If an organized cold pool forms like storms did
yesterday, this will likely serve as the focal point for any
convection. Hail will be the initial concern, as a couple reports
already include potential for half inch hail. That said, the
higher bases and dry air below will help melt any hail as it
falls, potentially reducing the impact of any larger stones in the
region. Wind will be a concern as a result as well, as the
inverted v soundings do have some potential to produce some
stronger gusts as storm towers collapse.

As we get into the late evening, any storm threat will quickly
diminish again as the surface cools. There is at least a small
concern for the development of ground fog again tonight, mainly in
the areas where rain passes today. The main factor against fog
however will be the drier dewpoints forecast for overnight, so
left it out of the grids for now.

In fact, the drier and slightly cooler air in the forecast will
help establish surface high pressure over the area for Sunday.
This should inhibit additional storms developing tomorrow, despite
temperatures getting back into the lower to upper 80s.

.LONG TERM...Sunday Night Through Saturday
Issued at 212 PM CDT Sat Jun 3 2023

A cold front will track through the western Great Lakes on
Monday, which will bring the chance for showers and maybe a few
thunderstorms as it tracks through the region. NWP models are a
bit less optimistic about precipitation chances as this front
moves through the area, especially across east-central and
northeast Wisconsin. Model soundings show quite a bit of dry air
as the front moves through the area on Monday; therefore,
precipitation chances have been lowered as this front sinks south
through the area.

Behind the cold front, a Hudson Bay high pressure system will
build south across the western Great Lakes region by the middle of
the week and sink further south over the Ohio Valley by the end
of the week. The high will usher in a cool, dry airmass across
the region with highs limited to the 70s and overnight lows in the
40s and 50s. Temperatures will slowly warm by the end of the week
as the high slides south and highs recover to around 80 degrees.

Return flow on the backside of the high along with an approaching
cold front will bring the chance for showers Friday into early
next weekend.
&&

.AVIATION...for 18Z TAF Issuance
Issued at 105 PM CDT Sat Jun 3 2023

Main aviation concern will be the development of some high base
showers and thunderstorms across northern Wisconsin this
afternoon. Main area expected to be impacted will be RHI, so a
mention was made for the afternoon to evening hours. Confidence
was lower as to how far south any storms would spread, so kept
mention out of the central WI TAF sites. VFR conditions are
expected outside of the storm threat, but brief lower visibility
is possible in any heavier downpours. Any convection will
dissipate overnight, but a small chance for ground fog returns
overnight for RHi as well, especially if rain crosses the area
this afternoon. Much quieter weather and good flying conditions
are anticipated for Sunday.
&&

.GRB WATCHES/WARNINGS/ADVISORIES...
None.
&&

SHORT TERM.....Uhlmann
LONG TERM......Kurimski
AVIATION.......Uhlmann

Hazardous Weather Outlook
National Weather Service Green Bay WI
251 PM CDT Sat Jun 3 2023

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-042000-
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-
251 PM CDT Sat Jun 3 2023

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

.DAY ONE...Tonight

Isolated thunderstorms are expected mainly north of highway 29
this evening. The strongest storms could produce wind gusts
around 40 mph, small hail, and brief heavy rainfall.

.DAYS TWO THROUGH SEVEN...Sunday through Saturday

Isolated thunderstorms are possible Monday. The risk for severe
weather is low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to report hail or wind gusts around 40 mph
through this evening.

LMZ521-522-541>543-042000-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
251 PM CDT Sat Jun 3 2023

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

.DAY ONE...Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Saturday

The probability for widespread hazardous weather is low.

Uhlmann/Kurimski

Preliminary Local Storm Report
National Weather Service Green Bay WI
323 PM CDT Sat Jun 3 2023

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

0250 PM     Hail             1 NW Spread Eagle       45.89N 88.14W
06/03/2023  M0.50 inch       Florence           WI   Trained Spotter

&&

Preliminary Local Storm Report
National Weather Service Green Bay WI
348 PM CDT Sat Jun 3 2023

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

0344 PM     Hail             Antigo                  45.15N 89.15W
06/03/2023  M0.88 inch       Langlade           WI   Trained Spotter

            Just east of Antigo. Nickel sized hail
            briefly, then transitioned to pea sized
            hail.

&&

KLJ

Special Weather Statement
National Weather Service Green Bay WI
349 PM CDT Sat Jun 3 2023

WIZ019-020-030-031-032130-
Shawano WI-Langlade WI-Marathon WI-Menominee WI-
349 PM CDT Sat Jun 3 2023

...Strong thunderstorms will impact portions of northeastern
Marathon, Menominee, Langlade and western Shawano Counties through
430 PM CDT...

At 347 PM CDT, trained weather spotters reported a strong
thunderstorm near Antigo, moving southwest at 15 mph. The
thunderstorm just east of Antigo was reported to have produced
nickel size hail. Other storms in this are may also produce hail up
to half inch in size at times.

HAZARD...Winds in excess of 30 mph and nickel size hail.

SOURCE...Trained weather spotters.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Antigo around 400 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4512 8942 4525 8942 4541 8893 4538 8892
      4538 8885 4513 8864 4512 8864 4512 8863
      4495 8849 4475 8874 4492 8886 4494 8945
      4512 8947
TIME...MOT...LOC 2047Z 060DEG 14KT 4513 8908

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...30 MPH

Uhlmann

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