Category: T-storms

Active Thursday Ahead…

* Your complete 7-Day forecast can be found below this post.

We continue to monitor things closely Thursday as a busy day is on tap.  Thunderstorms will initially blow into the region Thursday morning as a warm front lifts north through central Indiana.  These storms will be capable of producing heavy rain and vivid lightning.

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We’ll then get into a much warmer south wind (gusting up to 30 MPH) and watch radar trends closely to our west.  We’re still very concerned for a squall line plowing east through the region Thursday evening.  Time of greatest concern lies between 5PM and 8PM for this line, but we caution timing may have to be adjusted after looking over evening data.  Damaging straight line winds are of the greatest concern Thursday evening, along with torrential rainfall.

ThrSeverThreatSIMRadarFollowing the squall line, we’re also concerned for strong and potentially damaging northwest winds Thursday night, gusting up to 50 MPH, as low pressure rapidly deepens moving into the Great Lakes.

Bullet Point Thoughts You Need To Know For Thursday

  • Morning round of heavy rain and thunderstorms
  • Severe squall line capable of wind gusts over 60 MPH Thursday evening- targeting 5pm to 11pm
  • Heavy rain totals around 1″
  • Strong northwest winds Thursday night that could gust up to 50 MPH

Permanent link to this article: https://indywx.com/active-thursday-ahead/

Focus On Mid Week Flood/ Storm Threat…

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35/ 50

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21/ 35

17/ 28

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Forecast Updated: 02.19.14 @ 8:00a

One More Calm Day…A weak front blew through early Wednesday and produced a light shower for southeast parts of the state.  Sunshine will return Wednesday along with a blustery northwest wind.  It’ll be another mild day.

Concern For Flooding And Severe…With continued melting of a deep snow pack, combined with around an inch of rain (most of which falls within a 3 hour time period Thursday) and the stage will certainly be set for flooding.  In fact, we remain very concerned for flooding Thursday. If you live in a flood prone area, please prepare to seek higher ground Thursday as flood waters rise.

The second concern is a severe potential Thursday evening.  While the greatest threat for severe weather will remain south and east of our immediate region, we’ll have to be mindful of the potential of damaging straight line wind gusts Thursday evening.  The greatest threat lies between 5PM and 8PM Thursday as a line of thunderstorms pushes east through the state.  Again, damaging straight line winds, in excess of 60 MPH, is our greatest concern at present time.  Stay tuned.  Drier and much colder air will roar in behind the front Thursday night on strong and gusty northwest winds.

Weak Weekend Disturbances…A couple of fast moving disturbances will pass through the region this weekend and could spark scattered snow showers in the much colder air.

Accumulating Snow Early Next Week…Model data continues to struggle in the mid range handling energy coming east before what continues to look like a big blast of arctic air to wrap up February.  As of now, we’re targeting Tuesday for best chances of accumulating snow, but stress this a low confidence forecast in regards to timing at present.  Stay tuned.

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Permanent link to this article: https://indywx.com/focus-on-mid-week-flood-storm-threat/

Cold Today; Messy Monday Ahead.

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16/ 25

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1-3″ (and ice)

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Forecast Updated 02.16.14 @ 11:15a

Cold Sunday…Fresh off celebrating our snowiest winter on record (surpassed last night at IND at 51.6″ and the Record Event Report can be found here), we’ll enjoy a dry day, but blowing and drifting snow will remain an issue in the open country. A few breaks in the cloud cover can be expected this afternoon on what will otherwise be a rather cloudy day.  Highs will only climb into the lower to middle 20s (well below the average high of 40 and closer to the normal low of 24).  Yes, our cold, snowy winter just keeps on keepin’ on!

Snow And Ice Issues Monday…A storm system will move through the region Monday and deliver a mixture of precipitation types across central Indiana.  The way we see things unfolding as of this forecast update brings a wintry mix of sleet and snow into the city around noon with periods of moderate to even heavy wintry precipitation falling into the mid to late afternoon hours before we begin to see the shield of moisture push northeast.  This will be a “thump and go” type event.

As for precipitation type, this remains a challenge and will require much fine tuning later tonight and through the day tomorrow (another now cast scenario).  We’re thinking mostly snow is the dominant form of precipitation from the northern suburbs of Indianapolis and points north.  Here, 2-3″ of wet snow is possible, polished off with a light glaze of a freezing rain/sleet mixture before precipitation ends.  For the city, itself, we think around 1-2″ of snow is possible with a glaze of freezing rain of around a tenth of an inch. Farther south, to include the southern Indianapolis suburbs, an icy mixture of sleet and freezing rain will be the concern with glaze potential approaching one quarter inch.  Again, we caution this is our best idea at this point and we’ll post some fresh thoughts later this evening.

Needless to say, tomorrow stands to include treacherous driving conditions in and around central Indiana and the National Weather Service will likely issue Winter Weather/ Freezing Rain Advisories later this afternoon to account for the wintry conditions anticipated tomorrow afternoon.

Flooding Concerns On The Rise…With such a deep snowpack across central Indiana, combined with a frozen ground, flooding concerns will be on the rise as early as the middle to latter part of the week.  We think dry and chilly (albeit milder) conditions will be with us Tuesday, but low clouds, fog, and drizzle likely develop by Wednesday as milder air streams north over the snowpack locked in across the region.

By Thursday, our attention turns to the potential of heavy rain and a couple of thunderstorms as a cold front blows through the region.  Early ideas of Thursday rainfall numbers would suggest anywhere from .50-1″ of rain is laid down and when combined with the heavy snow pack and milder air, flooding concerns will certainly be present.  Needless to say, if you live in a flood prone area, please monitor the situation closely later this week.

Winter Blows Back In…As promised, the briefly milder shot of air would be just that- brief.  We continue to monitor data that suggests a colder, more wintry, pattern blows right back into the region to wrap up February.

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Permanent link to this article: https://indywx.com/cold-today-messy-monday-ahead/

Valentine’s Day Snow

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Forecast Updated 02.14.14 @ 11:00a

Accumulating Valentine’s Day Snow…The Canadian led the charge and other modeling has followed suit.  The region will deal with accumulating snow Valentines Day as low pressure moves southeast out of Missouri into the Tennessee Valley.  We think snow will fall at a good clip, periodically heavy, and begin around mid morning around the city.  In fact, a strip of 2-5″ of snow is likely to be laid down between Indianapolis and Louisville later today.  Latest radar trends from upstream and banding features suggest snowfall amounts may reach 6″ along the I-70 corridor. Needless to say, if you have travel plans this afternoon plan for snow covered roads and slick travel.

A fresh shot of arctic air will drill south into the region tonight and result in Saturday “wake up” temperatures in the single digits with a biting northwest wind.

Another Fast Moving Clipper…After a mostly dry Saturday, we forecast light snow to build back into the region Saturday night into early Sunday.  This will only be a light snow event and most amounts will be in the dusting to 1″ category.  The sun should quickly return Sunday afternoon, though it’ll remain colder than normal.

Foggy Start To The Week…As a southerly air flow transports milder air north and over the snow pack across central Indiana fog will develop.  It’s possible some freezing drizzle is dealt with Monday morning before temperatures rise above freezing.  Prepare for a downright gloomy start to the work week.  A cold front will push through the region Monday evening and lead to a period of showers, potentially transitioning to light snow or a light wintry mix Monday night as cold air sweeps back in.

A Spring Tease…A spring tease will have many Hoosiers wanting to break out the shorts by the mid week period.  In fact, highs will zoom into the 60s Thursday, courtesy of a strong and gusty southwest breeze.  The downside?  A line of showers and gusty thunderstorms later in the day.  While we still have a week to monitor this situation, the possibility is there for a few storms to reach severe levels across the Ohio Valley region.  Stay tuned as we monitor this developing weather situation.

Looking longer term, we anticipate the briefly milder spring “tease” to be just that.  Signals are increasingly favorable for a prolonged period of cold, wintry conditions building back into the region as we put a wrap on February and head into March.

imagesFor 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!

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Permanent link to this article: https://indywx.com/valentines-day-snow/

Extremely Dangerous Severe Weather Outbreak Ahead…

Good morning!  We’re waking up to sunshine this morning after a round of rain and thunderstorms overnight.  Over 1″ of rain fell for many during the overnight period (1.53″ to be exact here at IndyWx.com HQ).

Unfortunately, skies now are clearing and this is only going to aid in the severe weather potential today, including some dangerous long-lived and strong tornadoes.

ECWVThis is a very rare November high severe weather risk day and must be taken seriously by all.

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The thinking here hasn’t changed in that we feel discrete super cells develop during the late morning and early afternoon before morphing into a squall line capable of producing damaging straight line wind. With the dynamics and energy in play here, any of these super cells could spawn a tornado. Additionally, it’s possible that a few of these tornadoes could be long tracked and very strong tornadoes.  The latest high-resolution simulated radar data shows this well.

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We still target a cold front passing through the region around, or just after, sunset and with this frontal passage the severe weather will come to an abrupt end.  The latest HRRR data shows this well as dew points begin to crash behind the cold front, indicative a much drier, cooler, and more stable air mass arriving tonight.

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Permanent link to this article: https://indywx.com/extremely-dangerous-severe-weather-outbreak-ahead/