Special Weather Statement, NWS Northern Indiana

Area Forecast Discussion
National Weather Service Northern Indiana
145 AM EDT Mon Jun 21 2021

.SYNOPSIS...
Issued at 138 AM EDT Mon Jun 21 2021

Showers and thunderstorms are expected tonight. Strong to severe
storms are possible through early Monday morning, with a line of
storms moving from west to east through the area overnight.
Damaging winds, large hail, and heavy rain are the main threats.
Isolated tornadoes are possible. Otherwise, dangerous swimming
conditions are expected on Lake Michigan through Tuesday morning.
Cooler and drier air will settle in from Monday into the middle of
the week.

&&

.UPDATE...
Issued at 905 PM EDT Sun Jun 20 2021

MCV responsible for numerous severe reports will continue to
depart to the east over next few hours. Greatest severe threat
across far northeast locations is shifting off the east, but
isolated strong/severe storm has developed just east of Marion, IN
over past hour with still some MLCAPE on the order of 3000 J/kg
feeding in from central Indiana. Severe threat still in place with
any isolated/scattered storms along and east of the I-69 corridor
over next few hours. Primary threats still appear to be large hail
and isolated damaging winds but cannot completely discount
isolated tornado threat given combination of aforementioned
instability and effective bulk shear on  Attention will then turn
back across northern Illinois as cold frontal forcing increases
from the northwest. Best upper support shifts across the western
Great Lakes, and feel that greatest additional wind threat during
the overnight hours will be across northern half of the area.
Hodographs derived from regional VWPs have enlarged this evening,
but shear profile should become slightly more unidirectional in
nature overnight as low level flow veers slightly in advance of
the cold front. Isolated/scattered damaging wind gusts and
localized heavier downpours still appear to be primary threats
during the overnight hours with the cold frontal forcing. With
good combination of shear/instability in place across the area,
will maintain severe thunderstorm watch at this time despite lull
in many locations immediate behind the MCV.

&&

.SHORT TERM...(This Afternoon through Monday)
Issued at 240 PM EDT Sun Jun 20 2021

The main focus remains on the severe weather threat late this
afternoon into this evening. A MCV and associated cluster of
convection, located across ne MO, will be the main feature of
interest as it tracks into the local area by this time, with
convection growing upscale in the vicinity of a lingering sfc
boundary oriented w-e just north of US 30. An increasingly
moist/unstable boundary layer under strengthening southwest
flow/shear support SPC's higher probs for severe storms. Initial
storm evolution by 21-23z may favor discrete storms (with HP
supercell structures), likely transitioning to broken line segments
or an organized bowing segment. All hazards (hail/wind/tornado)
remain on the table as hodographs enlarge and wind fields
strengthen. Large hail and isolated tornadoes will likely be the
primary threats to start, then trending toward damaging winds with
any linear segments. Overall confidence in this severe storm
threat has increased, especially along/north of US 24...so be
weather alert and stay tuned for updates.

A second line of convection is still expected to develop along a
cold front in eastern IA/WI this evening, with the bulk of CAMs
bringing this east in the 5-9z Monday AM time window. Wind appears
the be the primary threat by this time, conditional on how
convection evolves late this afternoon and evening. Expectations at
this time are for this higher end gusts within the weakening
MCS/QLCS to be more isolated and confined to areas mainly west of
Interstate 69.

A few showers may linger into Monday morning before the cold front
exits to the east, especially along/east of I-69. Gusty northwest
winds and cooler otherwise into the afternoon.

&&

.LONG TERM...(Monday Night through Sunday)
Issued at 240 PM EDT Sun Jun 20 2021

A quick shot of cool air will be the wx story post-frontal Monday
night through Tuesday night with lows mid 40s to low 50s. Skies will
trend mainly clear otherwise as low level ridging translates through
on the backside of an exiting upper trough.

Wednesday into Thursday will feature a warming trend on the backside
of high pressure with any convection to focus off to the northwest
on the nose of a LLJ. Fold over of this moisture channel and
front will then bring the next decent chance for showers and
storms into Thursday night and Friday. Troughing then lingers over
the region into next weekend with additional rain chances and
cooler temps.

&&

.AVIATION...(For the 06Z TAFS through 06Z Monday Night)
Issued at 138 AM EDT Mon Jun 21 2021

A line of strong to severe storms ahead of a cold front, just
west of the KSBN terminal as of 540Z, will progress eastward to
KFWA over the next few hours. So far, wind gusts to 30 to 50 mph
have been reported with this line, in addition to low end MVFR
ceilings and IFR visibilities, so have a tempo group at KSBN/KFWA
to account for the line passage. Behind the cold front, winds
shift to the northwest at 15 to 25 knots or so and ceiling heights
linger around MVFR. Some of the guidance suggests that we could
even see a period of IFR ceiling heights (both sites), but
confidence wasn't high enough to include in the TAF at this time.
Conditions improve to VFR by Monday afternoon.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Beach Hazards Statement through late tonight for INZ003.

MI...Beach Hazards Statement through late tonight for MIZ077.

OH...NONE.
LM...Small Craft Advisory until 11 PM EDT this evening for LMZ043-046.

&&

UPDATE...Marsili
SYNOPSIS...MCD
SHORT TERM...Steinwedel
LONG TERM...Steinwedel
AVIATION...MCD

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Hazardous Weather Outlook...UPDATED
National Weather Service Northern Indiana
232 PM EDT Sun Jun 20 2021

INZ004>009-012>018-020-022>027-032>034-MIZ078>081-OHZ001-002-004-005-
015-016-024-025-211845-
St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-Pulaski-
Marshall-Fulton IN-Kosciusko-Whitley-Allen IN-White-Cass IN-Miami-
Wabash-Huntington-Wells-Adams-Grant-Blackford-Jay-Cass MI-
St. Joseph MI-Branch-Hillsdale-Williams-Fulton OH-Defiance-Henry-
Paulding-Putnam-Van Wert-Allen OH-
232 PM EDT Sun Jun 20 2021 /132 PM CDT Sun Jun 20 2021/

This Hazardous Weather Outlook is for northern Indiana, southwest
Michigan and northwest Ohio.

.DAY ONE...This afternoon and tonight.

Thunderstorms are expected late this afternoon into tonight. Severe
thunderstorms are possible, especially late this afternoon and
evening with large hail, damaging winds and isolated tornadoes the
main threats.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Chances for thunderstorms return Friday.

.SPOTTER INFORMATION STATEMENT...

Spotters will likely be needed late this afternoon into tonight.

INZ003-MIZ077-211845-
La Porte-Berrien-
232 PM EDT Sun Jun 20 2021 /132 PM CDT Sun Jun 20 2021/

...BEACH HAZARDS STATEMENT IN EFFECT FROM 2 AM EDT /1 AM CDT/ MONDAY
THROUGH LATE MONDAY NIGHT...

This Hazardous Weather Outlook is for northern Indiana and
southwest Michigan.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Beach Hazards Statement.

Thunderstorms are expected late this afternoon into tonight. Severe
thunderstorms are possible, especially late this afternoon and
evening with large hail, damaging winds and isolated tornadoes the
main threats.

Chances for thunderstorms return Friday.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Beach Hazards Statement.

Chances for thunderstorms return Friday.

.SPOTTER INFORMATION STATEMENT...

Spotters will likely be needed late this afternoon into tonight.

LMZ043-046-211845-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
232 PM EDT Sun Jun 20 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM TO 11 PM EDT MONDAY...

This Hazardous Weather Outlook is for the nearshore waters of
southeastern Lake Michigan.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Small Craft Advisory.

Severe thunderstorms are possible late this afternoon into tonight.
Winds and waves may be higher in the vicinity of storms.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Small Craft Advisory.

Chances for thunderstorms return Friday.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
233 AM EDT MON JUN 21 2021

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

0215 AM     TSTM WND GST     2 SW FISHERS LAKE       41.97N 85.60W
06/21/2021  M45 MPH          ST. JOSEPH         MI   AWOS

            AWOS STATION KHAI THREE RIVERS.

0204 AM     TSTM WND GST     3 WNW SOUTH BEND        41.70N 86.32W
06/21/2021  M48 MPH          ST. JOSEPH         IN   ASOS

            ASOS STATION KSBN SOUTH BEND INTERNATIONAL
            AP.

0144 AM     TSTM WND GST     3 WSW WATERFORD         41.66N 86.89W
06/21/2021  M47 MPH          LA PORTE           IN   MESONET

            MESONET STATION IN002 2.7 W WATERFORD
            (INDOT).

&&

Special Weather Statement
National Weather Service Northern Indiana
235 AM EDT Mon Jun 21 2021

MIZ079>081-210730-
Branch-Hillsdale-St. Joseph-
235 AM EDT Mon Jun 21 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN ST.
JOSEPH...BRANCH AND WESTERN HILLSDALE COUNTIES...

At 235 AM EDT, radar indicated strong thunderstorms were located
along a line extending from Burlington to 6 miles southwest of
Bronson. Movement was east at 40 mph.

Wind gusts up to 50 mph and pea size hail are possible with these
storms.

Locations impacted include...
Coldwater, Hillsdale, Bronson, Jonesville, Quincy, Union City,
Litchfield, Reading, Long Lake, Cambria, Girard, Kinderhook, Moscow,
Batavia, California, Burr Oak, Gilead, North Adams, Montgomery and
Sherwood.

This includes Interstate 69 in Michigan between mile markers 2 and
21.

Seek shelter until these storms pass.

&&

LAT...LON 4176 8465 4179 8537 4207 8520 4207 8447
TIME...MOT...LOC 0635Z 277DEG 33KT 4213 8507 4181 8527

HAIL...0.25IN
WIND...50MPH

MARSILI

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
237 AM EDT MON JUN 21 2021

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

0115 AM     TSTM WND GST     4 NW BRIDGMAN           41.98N 86.62W
06/21/2021  M38 MPH          LMZ043             MI   BUOY

            COOK NUCLEAR PLANT BUOY NEAR STEVENSVILLE,
            MI (BUOY 45026). GUSTS OBSERVED AT 1:10 AM
            AND 1:15 AM EDT.

&&

MCD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
239 AM EDT MON JUN 21 2021

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

0111 AM     TSTM WND GST     1 N BENTON HEIGHTS      42.13N 86.42W
06/21/2021  M37 MPH          BERRIEN            MI   ASOS

            BENTON HARBOR ASOS (KBEH).

&&

MCD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
242 AM EDT MON JUN 21 2021

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

0130 AM     TSTM WND GST     2 NW MICHIGAN CITY      41.73N 86.91W
06/21/2021  M39 MPH          LMZ046             IN   C-MAN STATION

            MICHIGAN CITY LIGHTHOUSE (MCYI3).

&&

MCD

Special Weather Statement
National Weather Service Northern Indiana
249 AM EDT Mon Jun 21 2021

INZ006>009-015>018-022>025-MIZ080-081-OHZ001-210715-
Miami-Huntington-Steuben-Wabash-Lagrange-Whitley-Noble-Kosciusko-De
Kalb-Allen-Cass-Fulton-Branch-Hillsdale-Williams-
249 AM EDT Mon Jun 21 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN WABASH...
NOBLE...WHITLEY...NORTHWESTERN HUNTINGTON...SOUTHERN KOSCIUSKO...
NORTHEASTERN CASS...EASTERN LAGRANGE...STEUBEN...NORTHWESTERN
ALLEN...DE KALB...SOUTHEASTERN FULTON...NORTHWESTERN MIAMI...
BRANCH...HILLSDALE AND NORTHWESTERN WILLIAMS COUNTIES...

At 249 AM EDT, radar indicated strong thunderstorms were located
along a line extending from 7 miles north of Quincy to 7 miles north
of Kendallville to North Webster to 9 miles northwest of Mexico.
Movement was east at 60 mph.

Winds in excess of 40 mph are possible with these storms.

Locations impacted include...
Warsaw, Auburn, Coldwater, Wabash, Kendallville, Columbia City,
Angola, Hillsdale, Garrett, North Manchester, Winona Lake,
Montpelier, Butler, Tri-lakes, Huntertown, Avilla, Albion,
Jonesville, Waterloo and Fremont.

This includes the following highways...
 Interstate 69 in Indiana between mile markers 325 and 357.
 Interstate 69 in Michigan between mile markers 1 and 21.
 Interstate 80 in Indiana between mile markers 133 and 156.
 Interstate 80 in Ohio between mile markers 0 and 13.

&&

LAT...LON 4206 8436 4204 8436 4155 8458 4132 8507
      4081 8570 4085 8636 4134 8576 4154 8534
      4207 8502
TIME...MOT...LOC 0649Z 269DEG 51KT 4205 8491 4155 8520 4134 8567 4091
8623

HAIL...0.25
WIND...40MPH

FISHER