River Flood Warning 14, NWS Northern Indiana

Area Forecast Discussion
National Weather Service Northern Indiana
1230 PM EST Mon Feb 27 2023

.SYNOPSIS...
Issued at 410 AM EST Mon Feb 27 2023

Widespread rain will develop this morning from west to east with a
few embedded thunderstorms. Showers will remain likely this
afternoon with isolated to scattered thunderstorms possible. A few
of the storms may be severe late this morning into this afternoon
across northern Indiana and northwest Ohio. It will become windy
today, and the gusty winds will continue into tonight as cooler air
moves into the area. Rainfall amounts around 1 inch are possible for
many locations through early this evening that may lead to some
ponding of water on roadways.

&&

.SHORT TERM...(Today and Tonight)
Issued at 410 AM EST Mon Feb 27 2023

Several potential hazards to monitor for the near term including
severe weather potential, synoptic winds, and locally heavy rainfall.

A vigorous upper level short wave across eastern Kansas/eastern
Oklahoma will be the feature of interest for the local area later
this morning into this afternoon. Very strong moisture transport
is underway this morning from Arkansas into northwest Illinois.
This axis of strong moisture transport will shift across northern
Indiana and northwest Indiana toward daybreak, which should allow
rain to fill in across the area from west to east. It still
appears as though low level profiles could support just a very
brief instance of light sleet/light freezing rain across south
central Lower Michigan portion of forecast area, but still
expecting quick transition over to rain after daybreak with no
impacts from this mixed precip expected. 00Z RAOB from KILX/KDVN
depicted an initially dry column of air that has resulted in
slightly delayed arrival time of rain. KILX RAOB also depicted
some already steep mid level lapse rates in place. Moistening of
the mid levels has likely eroded these mid level lapse rates to
some extent, but these respectable mid level lapse rates have
contributed to some embedded thunder this morning as far north as
northern Illinois. Thus, have expanded the isolated thunder
mention northward across northwest Indiana and southwest Lower
Michigan this morning. Rainfall with this initial warm/moist
advection wing may total around one half inch to locally three
quarters of an inch with some ponding of water on roadways
possible as we progress through the mid-late morning hours.

In terms of severe weather potential, from mid morning through early
this afternoon, we will be monitoring a strongly forced linear band
of showers and embedded thunderstorms that will be enhanced by a
strong upper speed max/vorticity max rounding the base of the
upstream trough. Inspection of hi-res near term forecast soundings
downstream this feature suggests instability will remain elevated in
nature. This leads to somewhat low confidence in severe potential
from mid morning through around midday. However, increasing shear
profiles and some veering of 0-3km shear vectors to west-
southwest suggests perhaps some potential for slightly elevated
mesovortices that could help mix down stronger flow aloft (~50-55
knots at 850 mb). Greatest severe risk at this time appears to be
in the 16Z-21Z period today, but still a good deal of uncertainty
with some of the mesoscale details.

Occluding system across the area will limit northward
progress of true warm sector, with triple point setting up across
southern portions of the forecast area this afternoon. A pocket
of cooler mid level air with the primary upper vort max and
approach of occluded front may offer at least a narrow axis of
sufficient surface/near surface instability (250-500 J/kg) to
produce an organized severe threat across approximately southern
half or southern third of the forecast area. Strong kinematic
profiles still lead to isolated damaging wind gusts as primary
hazard, with strong veering wind profiles supportive of some
supercell characteristics if these instability magnitudes are
realized. Greatest threat for isolated tornadoes would likely
reside across southeast portion of the area where flow should be
slightly more backed in advance of the triple point, and where low
level helicities are maximized. Near sfc moisture and boundary
layer evolution will be key today in the eventual magnitude of the
severe weather threat. Near term guidance differs quite a bit on
extent of low level mixing that influences not only instability
magnitudes but also details in hodograph structure. Some concern
as previous discussion mentioned that NAM/ARW may be a bit bullish
with near sfc moisture due to weaker mixing, but GFS
deterministic may be a bit too well-mixed. Much of southern half
of the forecast area is now in SWODY1 slight risk for severe
storms, with greatest potential likely setting up along and south
of US 24 corridor where greatest instability is likely to reside.

In terms of hydrology concerns, strong low level moisture transport
today will allow highly anomalous 1.0-1.2 inch PWAT axis to
overspread the area this morning, with fairly efficient rainfall
accumulations for a time this morning in initial warm/moist
advective wing. After expected more strongly forced band of
showers/embedded thunder moves from west to east across the area mid
morning through early this afternoon, expecting more of a convective
nature to precip for remainder of the afternoon with lower
confidence in basin average rainfall amounts. Have kept with
previous forecast thinking of 0.75" of storm total rainfall
across the south to 0.75-1.25" across the north, although good
deal of variation in amounts is expected due to convective nature.
If higher precip materializes than forecast, any instances of
moderate river flooding should be isolated and limited to Maumee
Basin where river levels are high and antecedent soil moisture is
maximized. Areal flood concerns should be limited to more of
nuisance minor flooding/ponding scenario today.

In terms of winds, have generally kept sub-advisory wind gusts in
the forecast today, although still concerned about a window late
this morning through mid afternoon along and south of US 24 where
some better mixing profiles would be possible that could support a
brief period of synoptic gusts into the 40 to 45 mph range. This
will again depend on extent of low level mixing in occluded
quadrant of this system. Low level cold advection overspreading
area this evening still looks to be sub-advisory level. Given the
above, have opted to hold off on wind advisory headlines.

Some linger showers across NE IN/NW Ohio this evening should
diminish late evening, with windy/colder conditions and lows
dropping back into the 30s tonight.

&&

.LONG TERM...(Tuesday through Sunday)
Issued at 410 AM EST Mon Feb 27 2023

The main weather story for the long term period will be the next
vigorous system to affect the region late Thursday night into Friday
evening which could bring impactful winter weather.

Tuesday will still feature well above normal temperature
conditions with extent of cold air limited in wake of Monday's
system. Another progressive eastern Pacific wave will eject out of
the northern Rockies Tuesday night into Wednesday bringing a shot
of some decent advective forcing for Wednesday, and a chance of
rain showers across the north. It will be mild Wednesday with
highs likely reaching into lower 60s south of US 24.

Attention then turns to the next vigorous upper level short wave
which digs across Four Corners region Thursday afternoon before
lifting east-northeast across the Lower or Mid MS Valley.  While
there is still a great deal of uncertainty in track of this system,
there has been a notable northward trend with this system over the
past several guidance cycles. Deep low pressure is expected to
develop across the southern Plains with this system with an
eventual occlusion that may provide a favorable storm track for
impactful winter weather locally for late Thursday night into
Friday. Details regarding this system will be resolved over the
next few days in terms of storm track and snow/mixed precip
potential. Depending on the track, a good deal of wind may also
accompany this storm. It does appear this system will be
progressive with trend back to dry conditions by Saturday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday Afternoon)
Issued at 1227 PM EST Mon Feb 27 2023

An upper level low pressure system continues to move through the
area during the afternoon bringing times of showers and
thunderstorms into the evening hours. As a result, continue to
expect IFR flight conditions from times of lowered VISBY from
moderate to heavy rain and lowered CIGs. Some moderation in flight
conditions will be possible later this evening as the upper low
begins to pull away and diurnal warming becomes realized, but cold
air advection will be able to take over putting the area back into
MVFR flight conditions through tonight. Low level moisture appears
to taper off overnight so wouldn't be surprised if we scatter out
Tuesday morning.

Additionally, gusty winds between 25 and 30 kts will be possible
this afternoon into tonight.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...NONE.
MI...NONE.
OH...NONE.
LM...Gale Warning until 4 AM EST Tuesday for LMZ043-046.

&&

SYNOPSIS...Marsili
SHORT TERM...Marsili
LONG TERM...Marsili
AVIATION...Roller

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Hazardous Weather Outlook
National Weather Service Northern Indiana
1113 AM EST Mon Feb 27 2023

INZ005>009-103-104-204-MIZ078>081-177-277-OHZ001-002-004-005-281615-
Elkhart-Lagrange-Steuben-Noble-De Kalb-Northern La Porte-
Eastern St. Joseph IN-Western St. Joseph IN-Cass MI-St. Joseph MI-
Branch-Hillsdale-Northern Berrien-Southern Berrien-Williams-
Fulton OH-Defiance-Henry-
1113 AM EST Mon Feb 27 2023 /1013 AM CST Mon Feb 27 2023/

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

.DAY ONE...This afternoon and tonight.

Additional rainfall today will likely lead to renewed rises in river
levels along with a potential of ponding of water on roadways and
minor flooding.

Wind gusts to around 40 mph are possible into this afternoon.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

A storm system could bring impactful winter weather and snow
accumulations to the region for the late Thursday night through
Friday evening period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

INZ012-014-017-018-025>027-116-203-216-OHZ015-016-024-025-281615-
Starke-Marshall-Whitley-Allen IN-Huntington-Wells-Adams-
Northern Kosciusko-Southern La Porte-Southern Kosciusko-Paulding-
Putnam-Van Wert-Allen OH-
1113 AM EST Mon Feb 27 2023 /1013 AM CST Mon Feb 27 2023/

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

.DAY ONE...This afternoon and tonight.

Additional rainfall today will likely lead to renewed rises in river
levels along with a potential of ponding of water on roadways and
minor flooding.

Wind gusts to around 40 mph are possible into this afternoon.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

A storm system could bring impactful winter weather and snow
accumulations to the region for the late Thursday night through
Friday evening period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

INZ013-015-020-022>024-032>034-281615-
Pulaski-Fulton IN-White-Cass IN-Miami-Wabash-Grant-Blackford-Jay-
1113 AM EST Mon Feb 27 2023

...TORNADO WATCH 46 IN EFFECT UNTIL 4 PM EST THIS AFTERNOON...

This Hazardous Weather Outlook is for northern Indiana.

.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.

   Tornado Watch.

Additional rainfall today will likely lead to renewed rises in river
levels along with a potential of ponding of water on roadways and
minor flooding.

Isolated to scattered severe storms capable of damaging wind gusts
and isolated tornadoes are possible through late this afternoon.
Outside of any severe storms...winds may gust up to 45 mph this
afternoon into this evening.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

A storm system could bring impactful winter weather and snow
accumulations to the region for the late Thursday night through
Friday evening period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

LMZ043-046-281615-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
1113 AM EST Mon Feb 27 2023

...GALE WARNING IN EFFECT UNTIL 4 AM EST TUESDAY...

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.

   Gale Warning.

An isolated thunderstorm is possible through midday today.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous conditions for small craft are possible again Thursday
night through Friday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Special Weather Statement
National Weather Service Northern Indiana
1046 AM EST Mon Feb 27 2023

INZ012>015-017-018-020-022>027-032>034-116-203-216-OHZ015-016-024-
025-280000-
Starke-Pulaski-Marshall-Fulton IN-Whitley-Allen IN-White-Cass IN-
Miami-Wabash-Huntington-Wells-Adams-Grant-Blackford-Jay-
Northern Kosciusko-Southern La Porte-Southern Kosciusko-Paulding-
Putnam-Van Wert-Allen OH-
Including the cities of Knox, North Judson, Bass Lake, Winamac,
Francesville, Medaryville, Plymouth, Bremen, Culver, Rochester,
Akron, Columbia City, Tri-Lakes, South Whitley, Fort Wayne,
New Haven, Monticello, Monon, Brookston, Logansport,
Royal Center, Peru, Grissom AFB, Mexico, Wabash,
North Manchester, Huntington, Roanoke, Bluffton, Ossian, Decatur,
Berne, Marion, Gas City, Upland, Hartford City, Montpelier,
Portland, Dunkirk, Syracuse, Milford, North Webster, Leesburg,
Wanatah, La Crosse, Union Mills, Warsaw, Winona Lake,
Silver Lake, Mentone, Paulding, Antwerp, Payne, Ottawa, Leipsic,
Columbus Grove, Continental, Pandora, Van Wert, Ohio City, Lima,
and Spencerville
1046 AM EST Mon Feb 27 2023 /946 AM CST Mon Feb 27 2023/

...GUSTY WINDS TODAY...

A weather system will continue to bring rain and gusty winds to
the area today. Thunderstorms can also be expected going into this
afternoon. In most areas, southerly winds of 15 to 25 mph with wind
gusts between 30 and 40 mph are likely. Thunderstorms may produce
gusts in excess of 45 mph. Gusty winds could blow around
unsecured objects. Tree limbs could be blown down and a few power
outages may result.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
109 PM EST MON FEB 27 2023

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

0105 PM     HAIL             4 E BRUCE LAKE STATION  41.06N 86.33W
02/27/2023  M1.00 INCH       FULTON             IN   AMATEUR RADIO

            REPORT OF NICKEL TO QUARTER SIZE HAIL
            FALLING 7.5 MILES WEST OF ROCHESTER ON STATE
            ROAD 14 IN WESTERN FULTON COUNTY, IN.

&&

MJ