Category: Unseasonably Warm

Dec 18

Significant Flood Situation Ahead…

Your latest 7-Day video forecast can be found in the video player to the right of this post.

We’ve known for over a week now that we’ll have to deal with a pre-Christmas storm. Latest guidance suggests our region undergoes a 3-4 day thaw with a decidedly warmer southwest flow ahead of this storm.  Additionally, with the more northern track of the surface low, we’re looking at nearly all of the precipitation associated with this storm falling as rain.  Combine our frozen ground with a significant early-season snow pack and multiple inches of rain ahead in the Thursday night through Sunday time period and the stage is set for a significant flood situation this weekend.

Here’s a look at what the latest forecast models show.  We’ve posted the GFS, Canadian, and European models below to display total rainfall between Thursday through Sunday.  The majority of this rain falls in two waves- Friday and again late Saturday into early Sunday.

gfs_total_precip_east_22cmc_precip_by10_east_1ecmwf_tprecip_indy_21

If the rainfall numbers are even half of what is projected above, we’re looking at a significant flood situation.  Needless to say, if your property is in a low-lying area, or one that is prone to flooding, I would begin to prepare now for major water rise in the days to come.

Much more later!

Permanent link to this article: https://indywx.com/2013/12/18/significant-flood-situation-ahead/

Nov 12

Wednesday Forecast: A Bitterly Cold Start

Updated 11.12.13 @ 8:50p

Zionsville, IN After waking up to half an inch of snow, sunshine engulfed most of the region Tuesday. The vitamin D didn’t help temperatures moderate much as highs were more like mid to late December as opposed to mid November. We discuss a warming trend below, after a frigid start to your Wednesday.

Status-weather-clear-iconWednesday: Mostly sunny; 19/ 39

A strong area of high pressure will move overhead Wednesday and help supply a mostly sunny sky.  Despite the sun, it’ll be another unseasonably cold day.  Many outlying communities will begin the day in the upper teens before rising into the upper 30s to near 40 by afternoon- a solid 15 degrees below normal.

Status-weather-clouds-iconThursday: Partly cloudy; 28/ 49

The same high pressure that will be directly overhead Wednesday will begin to move east Thursday. This will put our region in a southwesterly air flow and allow temperatures to begin moderating. After another cold start, highs will push towards the 50 degree mark Thursday afternoon.

Status-weather-clouds-iconFriday: Partly cloudy; 35/ 52

We’ll wrap the work week up with a few more clouds and temperatures still slightly cooler than normal, though much milder than those we’re dealing with now.

 

Status-weather-showers-day-iconSaturday:  Turning cloudy with PM showers (0.20″); 40/ 59

Model data continues to hint at increasing clouds and the threat of afternoon light rain. We’ll initially have to overcome the dry air mass in place, but by afternoon/ evening we should have scattered showers beginning to impact central portions of the state.

Status-weather-showers-scattered-iconSunday: Cloudy with rain likely (0.45″); 52/ 60

More widespread rain will arrive for the second half of your weekend.  Highs will approach 60 and should we see any sunshine (not looking likely at this point), temperatures could go into the lower to middle 60s. While temperatures will be much warmer we’ll have to contend with rain Sunday.

Status-weather-storm-night-iconMonday: Showers and possibly a thunderstorm (0.50); 34/ 63

A strong cold front will blow through the state Monday evening. Out ahead of the front, an impressive surge of warmer and more humid air will move north and encompass central Indiana during the day. In fact, latest model data suggests dew points reach the lower 60s Monday. The combination between the warmer, more humid air in place and an impressive surge of arctic air behind the front could team up to produce a clap or two of thunder with the moderate to heavy rain threat Monday afternoon as the front moves through. Temperatures will then crash Monday night.

Status-weather-snow-scattered-day-iconTuesday: Scattered snow flurries; 24/ 34

The big story Tuesday will be the much colder air mass rushing into the state on strong and gusty northwest winds. Just enough moisture may linger to create the chance of scattered snow flurries.

Permanent link to this article: https://indywx.com/2013/11/12/wednesday-forecast-a-bitterly-cold-start/

Nov 09

Closer Look At Saturday!

Happy college football Saturday!  Here’s a quick post before the fun begins this afternoon!  War Eagle!

Today will be a beautiful day, albeit windy.  Winds will gust out of the southwest up to 30 MPH at times. Partly cloudy skies are on tap as highs reach the upper 50s to lower 60s, courtesy of that mild southwest air flow.

Enjoy the warmth while you have it, as the next 7 days will be MUCH colder than average.  By Tuesday, highs will remain in the 30s with AM light snow. Overnight lows by Wednesday morning?  How do the lower 20s sound?

hrrr_t2m_max_indy_16

Permanent link to this article: https://indywx.com/2013/11/09/closer-look-at-saturday/

Nov 05

Two Totally Different Solutions For Next Week!

I wanted to quickly post on two totally different scenarios for next week.  Two of the more powerful forecast models we use to look into the mid-long range are in separate worlds when it comes to the weather pattern the middle to latter part of next week.

Here’s a look at the GFS upper air pattern:

gfs_z500_sig_east_38

Note the eastern ridging which would lead to well above normal temperatures during the middle to latter part of next week (by as much as 10 degrees above average), along with dry conditions.

HOWEVER, here’s a look at the European’s forecast upper air pattern late next week:

ecm_z500_anom_east_11

This would certainly be quite the significant storm for the Northeast, but the implications here are vastly different from that which the GFS shows above.  Instead of warmth and dry conditions, we’d deal with highs in the middle 30s and overnight lows in the lower to middle 20s.  Additionally, we’d also “enjoy” (okay, some folks would “enjoy”) snow showers and snow squalls the middle to latter portion of next week, as noted per the European below, including a lake Michigan connection.

ecmwf_slp_precip_ky_36

 

Needless to say, we have a lot to sort out in the coming days.  We’ll be here to do just that.  Make it a great Tuesday!

Permanent link to this article: https://indywx.com/2013/11/05/two-totally-different-solutions-for-next-week/

Oct 10

Changes Brewing?

After an unseasonably cool summer, the pattern flipped to a warmer regime during the month of September.  That same warm pattern continues presently, but are changes brewing?

We note the PNA (Pacific North American pattern) is trending positive and this could help promote more of a sustained trough and associated cooler than normal pattern to wrap up October.  Would it be enough to offset the very warm first half of October?  Too early to tell.  However, I will say that with the PNA trending positive, it does suggest we’ll be looking at more sustained chilly conditions, as opposed to the “in and out” flirtations of cool air as of late.

The GEFS suggests a trough sets up shop across the eastern part of the country for the back half of October.

IMG_0889

Permanent link to this article: https://indywx.com/2013/10/10/changes-brewing/

Oct 06

Sunday Afternoon Rambles…

Rain was plentiful over the region over the past 48 hours.  While widespread 2″ rainfall was common for all of central Indiana, the heaviest rainfall fell across southern and eastern Indiana.

Here are a couple of illustrations of the rainfall totals.  The first image is storm total rainfall from the past 24 hours. Note the heavy, 4″ type rains over southern and eastern Indiana. The second image is off the awesome Weatherbell model site and shows the heavy rainfall event over Indiana that unfolded on a bigger scale.  Needless to say, the short term drought concerns that we were dealing with August and September have been erased.

1379925_643932488960824_62568978_n

 

 

 

 

 

 

 

 

 

 

 

 

 

 

rtma_precip_48

Temperatures are running MUCH cooler over the region today and we also note a drier, more fall-like, air mass building into the region.  A couple of other items- it’s easy to see where the cold front is currently located (as of this post) as many in Ohio are still dealing with warm, humid conditions.  Additionally, the cold core upper level low remains to our west and will rotate over our region Monday.  This will lead to an unseasonably cool day with mostly cloudy skies and the potential of a scattered shower.

rtma_glus

As we move forward, despite the cooler air to welcome in the new work week, we remain in a warmer than average pattern overall.  The PNA continues to dominate the pattern and until this goes positive, don’t look for any sort of sustained cool weather across the eastern US.

gfs_pna_bias

 

 

 

 

 

 

The European operational and ensemble show the current trough and associated cool air retreating and allowing a warmer southwesterly air flow to build in this week.

Monday

Geopotential32at32500hPa_North32America_24

 

 

Thursday

Geopotential32at32500hPa_North32America_96After a quiet time ahead (and much needed to dry out), our next significant storm system appears to arrive around mid month.  Both the GFS and European model are in agreement with this idea.  Does another potential significant rain maker and associated severe weather event lie ahead mid month?  Possibly.

Here’s a look at the upper air pattern out at Day 10 off the European model.  We note another significant storm system ejecting out into the Plains states, most likely after dumping another impressive early autumn snow on the central and northern Rockies.

ecm_z500_anom_noram_11

The GFS idea is something similar to that of the European, suggesting confidence is relatively high, at least from this distance.

gfs_z500_sig_noram_37

All of that said, we’re still in a “transient” pattern as the next big storm is shown crashing onshore along the west coast by both models.  We shouldn’t be surprised by a “transient” pattern this time of year. It’s October, after all- a month notorious for many swings on the thermometer.

We’ll close with a look at the European’s temperatures anomalies over the course of the next 10 days.  Note the chill of early week erased with above normal warmth for the majority of the period. Also, pay attention to the unseasonable chill coming off the Rockies and into the Plains towards the end of the period below.  This is associated with the mid month storm.

tavg_anom_ecmwf_conus_1

Permanent link to this article: https://indywx.com/2013/10/06/sunday-afternoon-rambles/

Oct 05

Noisy Night Ahead; Longer Range Thoughts

A noisy night is ahead as the promised heavy rain event and strong to severe thunderstorms arrive in the city around, or just prior to 8pm.  A couple of rounds…

You must be logged in to view this content. Click Here to become a member of IndyWX.com for full access.  Already a member of IndyWx.com All-Access?  Log-in here.

Permanent link to this article: https://indywx.com/2013/10/05/noisy-night-ahead-longer-range-thoughts/

Oct 03

Friday Forecast: Feeling Like Summer In October

Updated 10.04.13 @ 7:45a

Zionsville, IN Thursday started off with cloudy skies and scattered showers, but rainfall amounts were extremely light for the most part across central Indiana.

Remember you can Follow Us on Twitter @indywx or Friend Us on Facebook (search IndyWx.com) 

Status-weather-clouds-iconFriday: Partly cloudy; 64/ 84

While we cannot rule out an isolated shower or thunderstorm Friday, we think the majority of central Indiana wraps up the work week rain-free. Get outside and enjoy temperatures at summer-like levels. We think we top the middle 80s with continued unseasonably muggy conditions prevailing.

Status-weather-showers-day-iconSaturday: Increasing clouds; late showers and t-storms; 0.40″ 66/ 80

Most of your Saturday looks rain-free and continued unseasonably warm. We’ll note a gusty southwesterly breeze from time to time. As a cold front approaches, skies will begin to cloud up and scattered showers and thunderstorms will develop. Rain chances will be with us in a widely scattered form from late morning on, but the better chances of getting wet appear to arrive Saturday night. We also note the Storm Prediction Center has placed the region in a Slight Risk of severe weather, with damaging winds the primary threat Saturday night. Stay tuned!

Status-weather-showers-day-iconSunday: Cloudy with showers and t-storms- late day clearing; 0.60″ 50/ 66

Showers and thunderstorms will be likely on your way to church Sunday morning, continuing into the afternoon before clearing takes place late. Winds will shift to the northwest and help usher in a MUCH cooler air mass Sunday afternoon. Temperatures will fall through the afternoon Sunday.

Status-weather-clear-iconMonday: Mostly sunny; 43/ 60

“FINALLY.” At least that will be the word IndyWx.com uses to describe Monday’s weather as some true autumn air builds into the region. Monday is shaping up to be a beauty of a day with bright sunshine and crisp, cool temperatures.

Status-weather-clear-iconTuesday: Mostly sunny; 44/ 68

Tuesday is looking to be a carbon copy of Monday thanks to high pressure remaining in control of our weather.  Classic early October weather conditions will prevail early next week.

 

Status-weather-clouds-iconWednesday & Thursday: Partly cloudy; mid to upper 40s/ lower to middle 70s

Dry conditions will continue as we progress through the middle of next week with moderating temperatures. Highs will return to above normal levels by Wednesday.

Permanent link to this article: https://indywx.com/2013/10/03/friday-forecast-feeling-like-summer-in-october/

Oct 02

Thursday Forecast; Warm & Muggy Conditions Prevail

Forecast updated 10.03.13 @ 7:32a

Zionsville, IN It sure is hard to believe we’re in early October.  Multiple days with dew points running at summer-like levels, along with temperatures a solid 10 degrees above normal will continue as we wrap up the work week. We discuss rain/ storm chances below. Even this morning there are considerable differences between the European and GFS, in particular.

Status-weather-showers-day-icon

Today: Scattered showers- 0.20″; 66/ 81

We think considerable cloudiness dominates the central Indiana landscape with scattered showers.  Rainfall amounts will be light for most and certainly much less than the aggressive European model suggested earlier in the week. We’ll sum today up as Mostly cloudy, warm, and muggy, with scattered showers.  We’re not looking at all day rains by any means, but keep the rain gear handy in case a shower moves through while you’re out and about.

Status-weather-clouds-iconFriday: Partly cloudy; 65/ 83

While we can’t completely rule out an isolated to widely scattered shower Friday, we anticipate most neighborhoods remaining dry.  Warm and unseasonably humid conditions will persist as we put a wrap on another work week.

Status-weather-showers-day-iconSaturday:  Partly cloudy, late night showers and t-storms- 0.40″; 66/ 82

Most of your Saturday should feature nice early autumn weather conditions.  In fact, it’ll feel more like summer rather than fall as gusty southwest winds help temperatures zoom into the lower 80s with a partly cloudy sky. Winds will gust upwards of 25 MPH in the open country Saturday afternoon. Otherwise, clouds will begin to increase later Saturday afternoon and showers and thunderstorms will move in Saturday night, in advance of a cold front.

Status-weather-showers-day-icon

Sunday: Early showers and t-storms then decreasing clouds- 0.50″; 48/ 66

After reviewing latest model data we now think most of the showers and thunderstorms fall during the first half of your Sunday with decreasing cloudiness, falling temperatures, and a distinct wind shift taking shape Sunday afternoon. That said, as mentioned to open the forecast above, considerable model differences remain between our two more powerful forecast models. Stay tuned. Once the front blows east of the region, you’ll certainly know it as a MUCH cooler and drier air mass is ushered in on winds gusting upwards of 25 MPH.

Status-weather-clouds-iconMonday: Partly cloudy; 44/ 63

“Now this is what it’s supposed to be like!”  That’s at least what this weatherman will be saying Monday. After a period of multiple days of unseasonably warm and muggy conditions, it’ll be nice to get some actual fall-like weather to enjoy as we kick off the new work week.

Status-weather-clouds-icon

Tuesday: Partly cloudy; 43/ 69

I hope you liked Monday’s weather forecast, as we’ll repeat that on Tuesday- perhaps just with a touch more sunshine and moderating afternoon temperatures, after a chilly start to the day.  Pumpkin spice latte anyone?

Status-weather-clouds-icon

Wednesday: Partly cloudy; 49/ 74

The early take at the middle of next week shows dry skies remaining with temperatures moderating back to above normal levels.

Permanent link to this article: https://indywx.com/2013/10/02/thursday-forecast-warm-muggy-conditions-prevail/

Oct 02

Brief Shots Of Cool Weather In An Otherwise Warm Pattern

Good Wednesday afternoon! As we analyze the latest data, one thing that screams out to us is that our warmer than normal pattern is going to continue at least for…

You must be logged in to view this content. Click Here to become a member of IndyWX.com for full access.  Already a member of IndyWx.com All-Access?  Log-in here.

Permanent link to this article: https://indywx.com/2013/10/02/brief-shots-of-cool-weather-in-an-otherwise-warm-pattern/

IndyWx.com