Winter Storm Watch 1, NWS Indianapolis, IN

363 
WWUS43 KIND 291550
WSWIND

URGENT - WINTER WEATHER MESSAGE
National Weather Service Indianapolis IN
1050 AM EST Fri Jan 29 2021

INZ021-028>031-037>042-049-300000-
/O.CON.KIND.WS.A.0001.210131T0000Z-210201T0600Z/
Carroll-Warren-Tippecanoe-Clinton-Howard-Boone-Tipton-Hamilton-
Madison-Delaware-Randolph-Henry-
Including the cities of Delphi, Flora, Williamsport, 
West Lebanon, Lafayette, West Lafayette, Frankfort, Kokomo, 
Lebanon, Zionsville, Tipton, Fishers, Carmel, Noblesville, 
Anderson, Muncie, Winchester, and New Castle
1050 AM EST Fri Jan 29 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY EVENING
THROUGH LATE SUNDAY NIGHT...

* WHAT...Heavy wet snow possible. Total snow accumulations of 3 
  to 8 inches possible.

* WHERE...Portions of central, east central, north central and 
  west central Indiana.

* WHEN...From Saturday evening through late Sunday night.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ind

300 
WWUS43 KIND 292022
WSWIND

URGENT - WINTER WEATHER MESSAGE
National Weather Service Indianapolis IN
322 PM EST Fri Jan 29 2021

INZ021-028>031-037>042-049-300430-
/O.CON.KIND.WS.A.0001.210131T0000Z-210201T0600Z/
Carroll-Warren-Tippecanoe-Clinton-Howard-Boone-Tipton-Hamilton-
Madison-Delaware-Randolph-Henry-
Including the cities of Delphi, Flora, Williamsport, 
West Lebanon, Lafayette, West Lafayette, Frankfort, Kokomo, 
Lebanon, Zionsville, Tipton, Fishers, Carmel, Noblesville, 
Anderson, Muncie, Winchester, and New Castle
322 PM EST Fri Jan 29 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY EVENING
THROUGH LATE SUNDAY NIGHT...

* WHAT...Heavy mixed precipitation possible. Total snow
  accumulations of 3 to 7 inches.

* WHERE...Portions of central, east central, north central and 
  west central Indiana.

* WHEN...From Saturday evening through late Sunday night. The
  heaviest snowfall is expected Saturday evening into the
  overnight.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ind

Ryan

342 
WWUS43 KIND 300231
WSWIND

URGENT - WINTER WEATHER MESSAGE
National Weather Service Indianapolis IN
931 PM EST Fri Jan 29 2021

INZ021-028>031-037>042-049-301045-
/O.CON.KIND.WS.A.0001.210131T0000Z-210201T0600Z/
Carroll-Warren-Tippecanoe-Clinton-Howard-Boone-Tipton-Hamilton-
Madison-Delaware-Randolph-Henry-
Including the cities of Delphi, Flora, Williamsport, 
West Lebanon, Lafayette, West Lafayette, Frankfort, Kokomo, 
Lebanon, Zionsville, Tipton, Fishers, Carmel, Noblesville, 
Anderson, Muncie, Winchester, and New Castle
931 PM EST Fri Jan 29 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY EVENING
THROUGH LATE SUNDAY NIGHT...

* WHAT...Heavy mixed precipitation possible. Total snow 
  accumulations of 3 to 7 inches.

* WHERE...Portions of central, east central, north central and 
  west central Indiana.

* WHEN...From Saturday evening through late Sunday night. The 
  heaviest snowfall is expected Saturday evening into the 
  overnight.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ind

595 
WWUS43 KIND 300751
WSWIND

URGENT - WINTER WEATHER MESSAGE
National Weather Service Indianapolis IN
251 AM EST Sat Jan 30 2021

INZ021-028>031-038>042-049-301700-
/O.UPG.KIND.WS.A.0001.210131T0000Z-210201T0600Z/
/O.NEW.KIND.WS.W.0001.210130T2100Z-210131T2100Z/
Carroll-Warren-Tippecanoe-Clinton-Howard-Tipton-Hamilton-Madison-
Delaware-Randolph-Henry-
Including the cities of Delphi, Flora, Williamsport, 
West Lebanon, Lafayette, West Lafayette, Frankfort, Kokomo, 
Tipton, Fishers, Carmel, Noblesville, Anderson, Muncie, 
Winchester, and New Castle
251 AM EST Sat Jan 30 2021

...WINTER STORM WARNING IN EFFECT FROM 4 PM THIS AFTERNOON TO
4 PM EST SUNDAY...

* WHAT...Heavy wet snow expected. Total snow accumulations of 5 
  to 7 inches.

* WHERE...Portions of central, east central, north central and 
  west central Indiana.

* WHEN...From 4 PM this afternoon to 4 PM EST Sunday.

* IMPACTS...Travel could be very difficult.

* ADDITIONAL DETAILS...The heaviest snow is expected to fall from
  7 PM to 1 AM. Some melting may occur by Sunday which will limit
  the overall snow depth at any given time.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for Indiana can be obtained by
calling 1 800 2 6 1 7 6 2 3

&&

$$

INZ037-301700-
/O.UPG.KIND.WS.A.0001.210131T0000Z-210201T0600Z/
/O.NEW.KIND.WW.Y.0003.210130T2100Z-210131T1500Z/
Boone-
Including the cities of Lebanon and Zionsville
251 AM EST Sat Jan 30 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO
10 AM EST SUNDAY...

* WHAT...Wet snow expected. Total snow accumulations of 3 to 5 
  inches.

* WHERE...Boone County.

* WHEN...From 4 PM this afternoon to 10 AM EST Sunday.

* IMPACTS...Plan on slippery road conditions.

* ADDITIONAL DETAILS...The heaviest snow is expected to fall from
  7 PM to 1 AM. Rain will mix in with the snow at times,
  especially after 3 AM tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for Indiana can be obtained by
calling 1 800 2 6 1 7 6 2 3

&&

$$

INZ035-036-046>048-056-057-065-301700-
/O.NEW.KIND.WW.Y.0003.210130T2100Z-210131T1500Z/
Fountain-Montgomery-Hendricks-Marion-Hancock-Shelby-Rush-Decatur-
Including the cities of Attica, Covington, Veedersburg, 
Crawfordsville, Plainfield, Brownsburg, Danville, Indianapolis, 
Greenfield, Cumberland, Shelbyville, Rushville, and Greensburg
251 AM EST Sat Jan 30 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO
10 AM EST SUNDAY...

* WHAT...Wet snow expected. Total snow accumulations of 3 to 5 
  inches.

* WHERE...Portions of central and west central Indiana.

* WHEN...From 4 PM this afternoon to 10 AM EST Sunday.

* IMPACTS...Plan on slippery road conditions.

* ADDITIONAL DETAILS...The heaviest snow is expected to fall from
  7 PM to 1 AM. Rain will mix in with the snow at times,
  especially after 3 AM tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for Indiana can be obtained by
calling 1 800 2 6 1 7 6 2 3

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ind

Area Forecast Discussion
National Weather Service Indianapolis IN
352 AM EST Fri Jan 29 2021

.UPDATE...
The AVIATION and LONG TERM Sections have been updated below.

&&

.SYNOPSIS...
Issued at 233 PM EST Thu Jan 28 2021

High pressure will hold across the area through Friday night. A
storm system is expected to move through the Ohio Valley around
Sunday into Monday. High pressure will return for the middle parts
of next week.

&&

.NEAR TERM (Rest of Tonight)...
Issued at 937 PM EST Thu Jan 28 2021

Forecast is in good shape. Most lower clouds have exited the area,
but some high clouds will move across from time to time tonight.

Temperatures have plummeted in snow covered areas with the clear
skies and light winds. Ongoing forecast captured this, so only
made some tweaks as needed.

Previous discussion follows....

Residual cloudiness over the northern and eastern zones associated
with a moisture plume off of Lake Michigan. These clouds expected to
dissipate shortly after sunset, as the moisture source is cut off
due to the weakening northwesterly low level flow.

Otherwise, expected a dry night as a strong surface ridge drifts
into the local area. Satellite suggests some passing high level
cloud is possible at times.

Due to the surface ridge moving in, setup appears good for decent
radiational cooling tonight, especially over the west central and
southern zones, where some deeper snow cover exists. Will cut about
5 degrees off of the GFS MOS lows tonight in those areas. Guidance
lows over the rest of the area look OK, given low level
thicknesses.

&&

.SHORT TERM /Friday and Friday Night/...
Issued at 233 PM EST Thu Jan 28 2021

Operational and ensemble data agree on keeping things dry through
Friday night, as surface and upper ridging hold over the Ohio
Valley. There will probably be an increase in cloud cover by Friday
night, as warm advection develops ahead of the next trough.

Based off on low level thickness progs, the GFS MOS temperature
guidance through the period looks reasonable at this time, so any
adjustments will be minor.

&&

.LONG TERM /Monday through Thursday/...
Issued at 350 AM EST Fri Jan 29 2021

While the progressive mid-level pattern for the period will perhaps
exhibit more amplification than earlier this winter, when some of
the southern-stream systems' circulations wholly cut-off from the
northern jet...true arctic air will still be very much absent from
the northwest flow entering Indiana Monday morning.  Nevertheless,
following any last snow showers that should taper off during the day
Monday...the approaching surface high will bring near to slightly-
below normal temps to start the work week. Residual considerable
cloudiness will likely linger Monday from the departing winter
storm's last lobe of troughiness. Upper level ridging will then
join the surface ridge's building-in amid the mid-level's greater
amplification...providing a decently pleasant-for-mid-winter
Tuesday-Wednesday, featuring lighter winds and partly to mostly
clear skies.

Moderation should follow around the Wednesday time frame courtesy
southeasterly flow as the surface high drifts to the east. Attention
will soon thereafter turn to the next mid-latitude storm that will
be coming out of the Rockies.  Some disagreement exists on how fast
this next system deepens at the surface, although there is at least
moderate confidence its central pressure drops significantly by late
Wednesday over the central High Plains, before tracking a good ways
to our region's west on Thursday. Guidance is indicating this
system's wave may actually tap into at least a piece of arctic
air by late week, although this detail will be hammered out in the
days to come. For central Indiana, progged to be on the system's
generally warm side, southerly breezes should provide an ample
ribbon of Gulf moisture. The storm's cold front will focus at
least chances of rain, or mix-to-rain Thursday.

Temperatures for the period through Wednesday are expected to range
from morning lows in the ~20F realm, while afternoon highs slowly
moderate through the 30s for most locations. Wednesday night-
Thursday is expected to feature readings well above normal.

&&

.AVIATION (Discussion for 29/0900z TAF Amendment)...
Issued at 350 AM EST Fri Jan 29 2021

Have amended both KHUF/KBMG as occasional IFR-, and otherwise
MVFR-visibility fog continues tonight over their snow cover.
While temperatures are currently maintaining a 4F dwpt-
depression at these two sites, still went with a TEMPO for 1SM
vis at both given the possible later temp drop per the general
lack of high clouds expected here through dawn.

Discussion for the 29/0600z TAF issuance follows...

IMPACTS: VFR with winds generally less than 10kt.
         Winds will gradually veer to SE by mid-morning.

DISCUSSION: High pressure will provide quiet weather. Can't rule
            out brief fog at KHUF or KBMG due to the snow pack,
            but at the moment believe odds are too low to mention.
            A few cumulus may develop Friday. Otherwise just
            passing high and mid clouds are expected.

CONFIDENCE: Medium confidence in VFR overnight at KBMG and KHUF.
            Otherwise high confidence in VFR and winds.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SYNOPSIS...JAS
NEAR TERM...JAS/50
SHORT TERM...JAS
LONG TERM....AGM
AVIATION...AGM/50

Hazardous Weather Outlook
National Weather Service Indianapolis IN
520 PM EST Thu Jan 28 2021

INZ021-030-031-038>042-049-292230-
Carroll-Clinton-Howard-Tipton-Hamilton-Madison-Delaware-Randolph-
Henry-
Including the cities of Delphi, Flora, Frankfort, Kokomo, Tipton,
Fishers, Carmel, Noblesville, Anderson, Muncie, Winchester,
and New Castle
520 PM EST Thu Jan 28 2021

This hazardous weather outlook is for central Indiana.

.DAY ONE...Tonight.

Outlook: Hazardous weather is not expected at this time.

Discussion: Cold and dry conditions are expected tonight as high
pressure moves in.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Outlook: Accumulating snow is expected this weekend, with significant
accumulations not out of the question. Travel may become difficult at
times.

Discussion: A low pressure system will bring a mix of rain and snow
to the area this weekend. Accumulating snow is expected at times, and
this could make travel difficult. However, the path of the low could
change, which would change snow amounts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

INZ028-029-035>037-043>048-051>057-060>065-067>072-292230-
Warren-Tippecanoe-Fountain-Montgomery-Boone-Vermillion-Parke-Putnam-
Hendricks-Marion-Hancock-Vigo-Clay-Owen-Morgan-Johnson-Shelby-Rush-
Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess-Martin-
Lawrence-Jackson-Jennings-
Including the cities of Williamsport, West Lebanon, Lafayette,
West Lafayette, Attica, Covington, Veedersburg, Crawfordsville,
Lebanon, Zionsville, Clinton, Newport, Rockville, Greencastle,
Plainfield, Brownsburg, Danville, Indianapolis, Greenfield,
Cumberland, Terre Haute, Brazil, Clay City, Spencer, Martinsville,
Mooresville, Greenwood, Franklin, Shelbyville, Rushville, Sullivan,
Linton, Bloomfield, Bloomington, Nashville, Columbus, Greensburg,
Vincennes, Washington, Loogootee, Shoals, Bedford, Mitchell,
Seymour, Brownstown, and North Vernon
520 PM EST Thu Jan 28 2021

This hazardous weather outlook is for central Indiana.

.DAY ONE...Tonight.

Outlook: No hazardous weather is expected at this time.

Discussion: Cold and dry conditions are expected tonight as high
pressure moves in.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Outlook: A mix of rain and snow is expected this weekend. Some
accumulating snow is possible.

Discussion: An area of low pressure will bring a mix of rain and snow
to central Indiana this weekend. Some snow accumulation is possible
at times, especially north of a Williamsport to Crawfordsville to
Columbus line. However, the path of the low could change, which
would change where snow accumulates and how much.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind