Category: Forecast Discussion

“O Canada…”

A developing weather situation warrants our attention tonight and that’s the potential of a snow event Valentine’s Day.  The Canadian has led the way with this system and other forecast model data is beginning to follow it’s lead, slowly, but surely :-).

While we have time to continue to fine tune things, the trend is certainly one for the snowier over the past 12 hours.  That’s not saying we have complete agreement amongst all forecast models, but the overall pattern is one that has to at least raise an eye brow for accumulating snow potential across central Indiana Friday.

A clipper system will dive southeast out of Canada and into the Dakotas Thursday.  It’ll race southeast through the Plains states and into Missouri as early as Friday before tracking into the lower Ohio and Tennessee Valleys’ Saturday morning.  Clipper systems can always be challenging to track, but especially during the late winter and spring months.  The combination of lingering winter chill and the resurgent spring warmth can turn what may seem like a “harmless” wet snow event into a full-blown snow storm with little warning if one’s not paying attention.  That’s not saying this is the case with this particular event, but it is saying we have a close eye on things.  This will come on the front end of a brief, but significant, pattern change that will promote warmer than normal conditions across the region next week.  The tight thermal gradient can essentially help fuel this system as it moves southeast (whether or not this makes “the turn” and adds to the snow pack along the East Coast is yet to be seen).  Temperatures Saturday may approach 50 degrees across southwest Missouri Friday while here, across the “snow fields” of central Indiana, we remain locked in the 20s.

For now we’ll refrain from hoisting snowfall potential, but suggest you keep a close eye on the Friday and Saturday forecast and plan for the likelihood of at least some accumulation.  Stay tuned.

Clipper21414

Permanent link to this article: https://indywx.com/o-canada/

Tracking Late Week Snow…

Tue.

Wed.

Thr.

Fri.

Sat.

Sun.

Mon.

 Status-weather-clear-icon

 Status-weather-clouds-icon

 Status-weather-clouds-icon

 Status-weather-snow-scattered-day-icon

 Status-weather-snow-scattered-day-icon

 Status-weather-clouds-icon

Status-weather-showers-scattered-icon

-12/ 1

0/ 27

9/ 36

22/ 30

12/ 28

14/ 29

25/ 39 

0.00”

0.00″

0.00”

1-2”

1”

0.00″

0.50”

Forecast Updated 02.11.14 @ 8:00a

Bitterly Cold Start…Take a look at the 8a central Indiana weather roundup, courtesy of the National Weather Service:

INZ030>032-037>040-046>048-054>057-064-065-111400-
CENTRAL INDIANA

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
INDIANAPOLIS   MOCLDY    -4 -10  75 N3        30.46R
-EAGLE CREEK   MOCLDY    -8 -14  74 NW6       30.46R WCI -21
KOKOMO *+      PTCLDY   -20 -26  76 CALM      30.46R
MARION +       MOCLDY   N/A N/A N/A CALM      30.47S
MT COMFORT *+  PTCLDY   -17 -20  83 CALM      30.46R
SHELBYVILLE    PTCLDY    -9 -15  75 CALM      30.47R
ZIONSVILLE +   PTCLDY   -15 -22  71 CALM      30.46R

This just makes me shiver!  We note temperatures as low as 16 degrees below zero reported at Zionsville this morning just after 7 o’clock.  Today will be another brutally cold day, but sunshine will prevail.  Arctic high pressure will remain anchored over our region and result in another bitterly cold night tonight, but not as cold as it was last night/ this morning.

Midweek Moderation…We’ll begin to get into a westerly and southwesterly air flow Wednesday into Thursday in advance of our next snow maker.  While temperatures will remain below average levels, it’ll feel nice to go above freezing Thursday, albeit briefly.  Gusty southwest winds could offset the relatively milder feel Thursday, as gusts may approach 25-30 MPH by afternoon.

Meanwhile, a major winter storm will impact the Deep South and result in heavy snow and ice accumulations.  My old stomping ground of Johnson County, TN will likely accumulate 7-10″ of heavy, wet snow Wednesday into Thursday morning.

Tracking Two Snow Systems…We continue to have a couple questions around two snow makers Friday and Saturday.  The Canadian forecast model remains most aggressive in snow production, delivering a full-blown snow storm Friday with 4-6″ totals while the GFS suggests we struggle to accumulate 1″ Friday.  We’re continuing to go with a blend between the two, and side with the European model for now.  This would suggest 1-2″ of snow Friday followed by another fast moving clipper system Saturday that could deposit another 1″, or so.  Stay tuned as we continue to fine tune the Friday-Saturday forecast.

Milder Air, But Wet…Our next storm system will move in Monday and looks to primarily be a rain maker. Who thought highs approaching 40 (seasonal levels) would feel warm?!  After this brutally cold winter, it’ll feel just that!

images

For weather updates and more “behind the scenes” data on the go, be sure to Follow Us on Twitter @indywx or become a Friend of IndyWx.com on Facebook!

twic

Permanent link to this article: https://indywx.com/tracking-late-week-snow/

Watching The Pattern Turn Active Yet Again…

After a dry period through early to mid week, our weather pattern will begin to turn active yet again as we head into late week and this weekend.  Three of our more trusted mid range computer models handle the individual impulses of energy differently and the snow potential ranges anywhere from nothing more than 1″ to as much as 10″ in the Friday-Tuesday period.  Most likely, we’re looking at something somewhere in the middle.

Our first chance of accumulating snow arrives Friday.  Both the European forecast model and Canadian forecast model agree on this, while the latest GFS takes the same energy through the Great Lakes, missing our region entirely.  We feel the GFS may be in error mode here.  While it’s possible the GFS may lead the way (anything is possible this far off), we feel the EC and Canadian have a better handle on things and we’ve based our forecast (post below) off a blend of these two models for Friday, including accumulating snow.

00_054_G1_north@america@zoomout_I_4PAN_CLASSIC@012_108f96

Our next shot of accumulating snow blows in Saturday.  All three models agree on this, but handle the track of the low, another clipper system, differently.  The Canadian tracks the low south of IND, strengthens it on it’s journey east and results in a full blown snow storm here Saturday.  The GFS and EC remain weaker and track the low across central or northern parts of the state, with much lighter snow amounts here.

00_054_G1_north@america@zoomout_I_4PAN_CLASSIC@012_120f120 gfs_namer_135_500_vort_ht_s

You can find your completed 7-Day forecast in the post below this one.  Finally, there are some signs the pattern may begin to relax and allow a milder brand of air into the region around the 20th.  We caution though that this won’t be a “suddenly it’s spring” pattern, but rather a tease of sorts as longer term signals suggest a wintry regime returns late February into March…

Permanent link to this article: https://indywx.com/watching-the-pattern-turn-active-yet-again/

ANOTHER Bitterly Cold Air Mass

Mon.

Tue.

Wed.

Thr.

Fri.

Sat.

Sun.

 Status-weather-clouds-icon

 Status-weather-clear-icon

 Status-weather-clear-icon

 Status-weather-clouds-icon

 Status-weather-snow-scattered-day-icon

 Status-weather-snow-scattered-day-icon

 images

-1/ 12

-12/ 15

0/ 27

10/ 37

19/ 24

3/ 25

20/ 34 

0.00”

0.00″

0.00”

0.00”

1-2”

1”

0.00”

Forecast Updated: 02.10.14 @ 5:05p

Bitterly Cold Air To Begin The New Work Week…A fresh batch of bitterly cold air settled into the Hoosier state overnight and is ready to greet us “smack dab in the face” on the way out the door.  We call this “ouch cold.”  Additionally, winds will remain gusty this morning and result in wind chill values as cold as 20-30 degrees below zero Monday.  Normally, this would be a huge deal, but seems to be “just another day” during the snowy and bitterly cold winter of 2013-2014.

As the arctic high moves overhead tonight into Tuesday morning, we’ll experience the coldest air of the week, bottoming out anywhere from 7 to 14 degrees below zero across the snowy central Indiana landscape. Officially, we’re forecasting 9 below to begin the day Tuesday for Indianapolis.

Midweek Moderation…Though we’ll remain below seasonal levels straight through the forecast period, we’ll notice a moderating feel to the air mass by the middle of the week.  The relatively milder air may be offset by strong and gusty winds blowing from the southwest Thursday in advance of our next weather maker.  Some concern will be there for blowing and drifting snow of the existing snow pack Thursday for the open country.

Monitoring Late Week…Forecast models continue to suggest we’ll deal with our next winter weather maker towards late week, but we caution timing and the precise track of the low pressure system will have to be fine tuned as we go through the week.  At this extremely early stage in the game, it does appear as if an accumulating snow will occur with this system in the Friday-Saturday time period. Stay tuned.

images

For weather updates and more “behind the scenes” data on the go, be sure to Follow Us on Twitter @indywx or become a Friend of IndyWx.com on Facebook!

twic

Permanent link to this article: https://indywx.com/another-bitterly-cold-air-mass/

A Snowy Weekend On Tap

Sat.

Sun.

Mon.

Tue.

Wed.

Thr.

Fri.

 Status-weather-snow-scattered-day-icon

 Status-weather-snow-scattered-day-icon

 Status-weather-clouds-icon

 Status-weather-clear-icon

 Status-weather-clouds-icon

 Status-weather-snow-scattered-day-icon

 Status-weather-snow-scattered-day-icon

5/ 24

16/ 28

-1/ 16

– 9/ 12

– 3/ 26

8/ 34

23/ 33 

0.50”

1-2″

0.00”

0.00”

0.00”

Dusting”

1”

Forecast Updated 02.08.14 @ 8:49a

Weekend Snow…While we’re not looking at a significant storm system this weekend, we’ll deal with waves of accumulating snow through the period.  A period of light snow will continue today, especially through early afternoon and then we’ll note renewed snow developing to our west this evening.  This area of snow is in response to additional upper level energy moving off the Rockies and will slide into central Indiana late tonight into Sunday.  Finally, there’s the chance portions of central and south-central Indiana see a third wave of light snow Sunday night into early Monday morning.  By the time all is said and done, we’re anticipating 1.5″ to 2″ of snow this weekend for most, with a few 3″ reports where snow persists.  It’ll be a cold weekend, but nothing as bitter as the past few days have been.

Another Arctic Blast…A sprawling arctic high will settle into the Ohio Valley to open the work week. This will supply dry weather, but yet another bitterly cold air mass.  We’ll note below zero overnight lows and highs only in the teens under mostly clear conditions.

Some Questions Around Late Week…Model data is in disagreement with the handling of the southern and northern streams of the jet late next week. As of now, we’re siding with a “middle of the road” approach and introducing snow showers into your forecast Thursday into Friday.  The possibilities range anywhere from an accumulating snow event to dry skies with moderating temperatures. Stay tuned.

images

For weather updates and more “behind the scenes” data on the go, be sure to Follow Us on Twitter @indywx or become a Friend of IndyWx.com on Facebook!

twic

Permanent link to this article: https://indywx.com/a-snowy-weekend-on-tap/