Special Marine Warning 91, NWS Cleveland, OH

Area Forecast Discussion
National Weather Service Cleveland OH
336 PM EDT Fri Oct 8 2021

.SYNOPSIS...
Weak low pressure will meander from the mid-Mississippi Valley
through the western Great Lakes through Saturday morning. High
pressure will persist over the area through Monday night as another
weak low pressure will move through the Great Lakes region through
Tuesday morning.

&&

.NEAR TERM /THROUGH SATURDAY NIGHT/...
Scattered showers and thunderstorms have begun to develop
across the area this afternoon and are expected to continue
through this evening, shifting to be primarily along and east of
the I71 corridor. An upper level shortwave trough, currently
over Illinois continues to move northeast across the Great Lakes
region. This has resulted in southerly winds in the lowest
layers, increasing the moisture content over the area and
bringing areas of vorticity aloft. This will continue to provide
support for shower and thunderstorm development this evening.
Clearing in the cloud deck this afternoon has also allowed CAPE
values to exceed 1000 J/kg, enhancing some of the storms to be
severe with hail near 1 inch being the primary threat with
freezing levels near 10kft. Locally heavy rainfall is also
possible, which may cause flash ponding. Shower coverage should
gradually decrease after sunset with the loss of daytime
heating. With calm winds across the area overnight tonight, and
a relatively moist airmass with dewpoints holding in the low
60s, areas of fog may develop across inland counties. Exact
locations will be dependent on many factors including ongoing
precipitation, areas that received precipitation today, any
clearing in skies. On Saturday afternoon, much of the area
should remain dry, however lingering moisture ahead of a
building ridge will reintroduce scattered showers and
thunderstorms Saturday afternoon, primarily for the eastern tier
of counties. Showers will again diminish near sunset. High
temperatures on Saturday will again be above average in the mid
to upper 70s, locally cooler in areas that receive showers.
Overnight lows will dip into the low 60s.

&&

.SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/...
An upper level ridge will edge its way into the central Great
Lakes region on Sunday, positioning the area between a strong
surface low over the northern Plains and a coastal low off the
Mid-Atlantic Coast. This high pressure will bring a drier
airmass aloft to the area, allowing for dry conditions and
unseasonably warm temperatures for the end of the weekend and
the beginning of next week. High temperatures on Sunday and
Monday will be in the low to mid 80s with overnight lows in the
low to mid 60s. With dewpoints during the day in the low to mid
60s, muggy conditions will spread across the area. Winds will
also increase to 10-15 mph from the south during this time.

On Monday night, a shortwave trough will move northeast along the
leading edge of an amplified upper level trough over the western
U.S., bringing an associated surface low across the western Great
Lakes region. This should not bring widespread impact to the area,
although isolated showers cannot be ruled out for the far western
counties. Increased cloud cover will be the primary result. Showers
should begin to diminish and move north by daybreak.

&&

.LONG TERM /TUESDAY THROUGH FRIDAY/...
An isolated lingering shower is possible Tuesday as the
aforementioned low pressure continues to move northeast out of
the Great Lakes region. High pressure will again build over the
area, allowing for widespread dry conditions through Thursday
morning. By the end of the week, models are consistent with a
Colorado Low developing and strengthening as it moves northeast
across the northern Great Plains/western Great Lakes. A strong
frontal boundary is expected to develop and move east with the
system, although exact timing and strength over the area remains
inconsistent with models. Have opted to have chance PoPs from
Thursday through the beginning of the weekend. Temperatures
through this period will remain above average in the mid to
upper 70s.

&&

.AVIATION /18Z Friday THROUGH Wednesday/...
Scattered VFR and MVFR conditions have developed over the area
this afternoon as scattered convection and a developing cu field
has lowered ceilings locally to MVFR heights. This afternoon,
the chance of showers and thunderstorms will increase as an
upper level shortwave moves over the area. Heavy rain with
reduced visibilities will be the primary concern. The best
chance for this heavy precipitation to develop will be for
terminals along and east of I71, persisting past sunset. Current
showers in western Ohio are expected to gradually diminish.

The chance of patchy fog returns tonight, particularly for
terminals that get breaks in the clouds. Have opted to reduce
visibilites and/or ceilings to MVFR and IFR for all TAF sites
between 9Z-14Z Saturday as BR/FG conditions are expected to
return. After sunrise, conditions will begin to improve across
the area. Winds will be light and primarily from the south
through the entire TAF period.

Outlook...Non-VFR possible with rain showers Monday night
through Tuesday morning.

&&

.MARINE...
Generally quite marine conditions will continue through the
weekend, with southerly winds of 5-10 knots, increasing to 10-15
knots on Sunday. Any thunderstorm development through this evening,
and again on Saturday afternoon may locally produce gusty winds
along with hail up to 1 inch. A Colorado low will develop and move
northeast over the western Great Lakes/northern Plains through
Tuesday, increasing the pressure gradient over Lake Erie and
resulting in winds up to 20 knots. Due to offshore flow, the highest
waves will remain along the northern coast and no marine headlines
are anticipated at this time.

&&

.CLE WATCHES/WARNINGS/ADVISORIES...
OH...None.
PA...None.
MARINE...None.

&&

SYNOPSIS...Campbell
NEAR TERM...Campbell
SHORT TERM...Campbell
LONG TERM...Campbell
AVIATION...Campbell
MARINE...Campbell

Hazardous Weather Outlook
National Weather Service Cleveland OH
321 PM EDT Fri Oct 8 2021

LEZ061-142>149-162>169-OHZ003-006>014-017>023-027>033-036>038-047-
089-PAZ001>003-091930-
Ripley to Buffalo NY extending from 5NM off shoreline to US-
Canadian border-Maumee Bay to Reno Beach OH-
Reno Beach to The Islands OH-The Islands to Vermilion OH-
Vermilion to Avon Point OH-Avon Point to Willowick OH-
Willowick to Geneva-on-the Lake OH-Geneva-on-the-Lake to Conneaut OH-
Conneaut OH to Ripley NY-
Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM
offshoreline to US-Canadian border-
Reno Beach to The Islands OH beyond 5NM off shoreline to US-
Canadian border-
The Islands to Vermilion OH beyond 5 nm off shoreline to US-
Canadian border-
Vermilion to Avon Point OH beyond 5 nm off shoreline to US-
Canadian border-
Avon Point to Willowick OH beyond 5 nm off shoreline to US-
Canadian border-Willowick to Geneva-on-the-
Lake OH beyond 5NM off shoreline to US-Canadian border-Geneva-on-the-
Lake to Conneaut OH beyond 5 nm off shoreline to US-Canadian border-
Conneaut OH to Ripley NY beyond 5 nm off shoreline to US-
Canadian border-Lucas-Wood-Ottawa-Sandusky-Erie-Lorain-Cuyahoga-Lake-
Geauga-Ashtabula Inland-Hancock-Seneca-Huron-Medina-Summit-Portage-
Trumbull-Wyandot-Crawford-Richland-Ashland-Wayne-Stark-Mahoning-
Marion-Morrow-Holmes-Knox-Ashtabula Lakeshore-Northern Erie-
Southern Erie-
321 PM EDT Fri Oct 8 2021

This Hazardous Weather Outlook is for Lake Erie, north central
Ohio, northeast Ohio, northwest Ohio and northwest Pennsylvania.

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Special Weather Statement
National Weather Service Cleveland OH
240 PM EDT Fri Oct 8 2021

OHZ009-019-081930-
Huron OH-Erie OH-
240 PM EDT Fri Oct 8 2021

...A strong thunderstorm will impact portions of northwestern Huron
and Erie Counties through 330 PM EDT...

At 240 PM EDT, Doppler radar was tracking a strong thunderstorm over
Milan, or over Norwalk, moving northeast at 20 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Sandusky, Norwalk, Milan, Northern Milan, Monroeville, Berlin
Heights, Fairview Lanes and Sandusky South.

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 4144 8266 4138 8250 4138 8246 4120 8255
      4125 8279
TIME...MOT...LOC 1840Z 207DEG 16KT 4128 8261

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Sefcovic

Special Weather Statement
National Weather Service Cleveland OH
443 PM EDT Fri Oct 8 2021

OHZ010-011-082130-
Lorain OH-Cuyahoga OH-
443 PM EDT Fri Oct 8 2021

...A strong thunderstorm will impact portions of west central
Cuyahoga and northeastern Lorain Counties through 530 PM EDT...

At 442 PM EDT, Doppler radar was tracking a strong thunderstorm over
Lorain, moving northeast at 15 mph.

HAZARD...Winds in excess of 35 mph and nickel size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Cleveland, Lorain, Lakewood, Westlake, Avon Lake, Amherst, North
Olmsted, Avon, Rocky River, Fairview Park, Bay Village, Sheffield
Lake and Sheffield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4149 8195 4148 8189 4148 8186 4150 8180
      4145 8177 4141 8219 4145 8222 4147 8218
      4152 8199
TIME...MOT...LOC 2042Z 240DEG 14KT 4145 8217

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

26

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CLEVELAND OH
509 PM EDT FRI OCT 8 2021

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

0457 PM     HAIL             2 NNE LORAIN            41.46N 82.18W
10/08/2021  E1.00 INCH       LORAIN             OH   PUBLIC

            PICTURES OF HAIL AROUND AN INCH FROM
            TWITTER.

&&

DK

Special Weather Statement
National Weather Service Cleveland OH
514 PM EDT Fri Oct 8 2021

OHZ010-082200-
Lorain OH-
514 PM EDT Fri Oct 8 2021

...A strong thunderstorm will impact portions of north central Lorain
County through 600 PM EDT...

At 514 PM EDT, Doppler radar was tracking a strong thunderstorm over
Elyria, moving northeast at 15 mph.

HAZARD...Nickel size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
Lorain, Elyria, North Ridgeville, Avon Lake, Avon, Sheffield Lake and
Sheffield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4150 8197 4143 8197 4138 8214 4142 8217
      4145 8216 4145 8217 4148 8215 4152 8202
      4152 8199
TIME...MOT...LOC 2114Z 214DEG 13KT 4141 8213

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

26

Special Weather Statement
National Weather Service Cleveland OH
521 PM EDT Fri Oct 8 2021

OHZ020-031-082200-
Medina OH-Wayne OH-
521 PM EDT Fri Oct 8 2021

...A strong thunderstorm will impact portions of southeastern Medina
and north central Wayne Counties through 600 PM EDT...

At 521 PM EDT, Doppler radar was tracking a strong thunderstorm over
Creston, or 9 miles north of Wooster, moving north at 15 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Medina, Wooster, Wadsworth, Rittman, Lodi, Creston, Chippewa Lake,
Seville, Smithville, Westfield Center, Gloria Glens Park, Burbank,
Chippewa-On-The-Lake and Briarwood Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4083 8182 4084 8195 4112 8203 4112 8171
TIME...MOT...LOC 2121Z 182DEG 15KT 4095 8189

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

26

Special Weather Statement
National Weather Service Cleveland OH
608 PM EDT Fri Oct 8 2021

OHZ006-017-082300-
Wood OH-Hancock OH-
608 PM EDT Fri Oct 8 2021

...A strong thunderstorm will impact portions of southwestern Wood
and northwestern Hancock Counties through 700 PM EDT...

At 607 PM EDT, Doppler radar was tracking a strong thunderstorm near
Rawson, or near Bluffton, moving north at 15 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Bluffton, North Baltimore, McComb, Rawson, Hoytville, Benton Ridge
and Mount Cory.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4124 8389 4121 8363 4087 8384 4088 8388
TIME...MOT...LOC 2207Z 190DEG 15KT 4097 8387

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

26