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Mar
18

Showers Return Tomorrow

Posted By · March 18, 2015 at 5:03 pm

A friendly reminder that the statewide Tornado Drill will be Thursday at 10:15am and 7:35pm.  Please take time during the day tomorrow to review your safety plan with family and friends.  If you don’t have a plan we encourage you or your employer to do so.

Also we plead with you not to rely on tornado sirens as a warning mechanism.  This is old technology that’s designed for outdoor warning only… and can only reach a limited area.  So you shouldn’t be surprised if you can’t hear them in your home tomorrow.  A weather radio or you smart phone is a more viable option to keep you and your family safe.  My diatribe is over now.

HEADLINES

If you’re like me and suffer from allergies… you’ve likely noticed an increase in sneezing.  That’s because our Pollen Index is in the medium to high range of late.  Tis the season and we’re in for the long haul.

POLLEN

Otherwise it’s been a decent day mid-March day in Central Indiana with the mix of sun and clouds, albeit cooler than normal with temperatures in the 40s.  We’re on borrowed time for dry weather with a wave of moisture creeping toward the region.  Very dry air at the surface keeps us rain-free this evening and much of tonight, with mid-level overcast having more bark than bite.

RADAR RPM THURSDAY 7AM

Cloud cover varies tonight as well.  Overcast will be more prevalent in the southwestern corner of the state, while drier air keeps the sky clear for the eastern half.  This results in a temperature spread of lower 30s near Marion & Muncie, to near 40 under the blanket of clouds .

PLANNER THURSDAY MORNING RPM THURSDAY 5PM PLANNER THURSDAY AFTERNOON

Sprinkles are possible late tonight into Thursday, but it appears the highest rain chances arrive late afternoon into the evening.  Rain showers linger into early Friday before an overall decrease in clouds occurs Friday afternoon.  The brighter finish Friday helps boost highs back into the 55 to near 60 degree range as astronomical spring begins at 6:45pm with the vernal equinox.

RPM THURSDAY 11PM RPM FRIDAY 4AM RPM FRIDAY 8AM RPM FRIDAY 4PM PLANNER FRIDAY 7day

Temperatures should get into the 60s Saturday for a mild, but breezy start to the weekend.  A cold front arrives Saturday evening to drop highs Sunday into the 40s.  The see-saw of air masses continue next week too… which is very typical of March.  In fact a few flakes of snow may possibly mix with rain showers during a Monday that sees highs in the upper 30s to near 40 degrees.

Have a great evening – Sean Ash

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Mar
17

Frosty Night Ahead

Posted By · March 17, 2015 at 5:06 pm

Happy St.Patrick’s Day!   As advertised it’s significantly colder, but near normal today compared to the balmy afternoon we enjoyed Monday.

TEMPS TEMP CHANGE

Temperatures are 25 to 30 degrees colder than 24 hours ago and “feels” 30-40 degrees colder when factoring in the stiffer northerly breeze.  Thankfully it’s nice and bright and afternoon highs in the lower 50s are normal for this date.

PLANNER EVENING

As the wind the calms overnight and clouds clear temperatures nose-dive into the lower to mid 20s Wednesday morning with areas of frost.

RPM WEDNESDAY 5AM RPM WEDNESDAY 5PM PLANNER WEDNESDAY

A chilly, but bright start Wednesday morning gives way to increasing cloud cover and highs close to 50 degrees.  The cloud cover lingers around Thursday with areas of sprinkles and showers making it raw with highs in the 45 to near 50 degree range.  Please note that Indiana will conduct a statewide tornado drill Thursday at 10:15am and 7:35pm.

RPM THURSDAY 7AM RPM THURSDAY 4PM PLANNER THURSDAY

The vernal equinox occurs Friday at 6:45pm and marks the beginning of astronomical spring.  It’ll fee like spring to start the weekend with highs near 60 Saturday.  But the temperature pendulum quickly swings back to below normal Sunday and much of next week.  We anticipate temperature anomalies of 10-15 degrees below normal beginning Sunday.  Have a great day – Sean Ash

TEMPS SATURDAY SUNDAY TEMPS 7DAY

 

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Mar
17

Northern Lights Possible This Evening?

Posted By · March 17, 2015 at 4:54 pm

It is a possibility here in Central Indiana as the Space Weather Prediction Center alerted of a severe geomagnetic storm in progress.  According to the SWPC this is due to the interaction of a pair of coronal mass ejections (CMEs) spewing from the sun earlier today and now interacting with the Earth’s atmosphere.

They note that similar events have produced aurora borealis as far south as Alabama, North Carolina and northern California.  It’s not a given, but we do expect clear conditions this evening.  They’re predicting the storm to diminish as the day ends… so it may be a race against time with our sunset time at 7:54pm.  Keep an eye to the north and please let us know if you’re fortunate enough to see this atmospheric treat.

Below is an aurora forecast map produced by the University of Alaska at Fairbanks:

AURORA FORECAST

 

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Mar
16

Warmest March Day In Three Years Followed By Wind Chills In 30s

Posted By · March 16, 2015 at 3:25 pm

Welcome to Central Indiana’s warmest day since late October and Indianapolis’ warmest March temperatures since 2012.  Sunshine will be filtered at times by high clouds, but a gusty southwest wind offsets any cloud cover.  Highs will be in the 70s with wind gusts 20-30mph.

TEMPS  

RPM MONDAY 11PM

Temperatures remain in the 50s for much of the night.  The passage of a cold front early Tuesday morning delivers a significantly colder air mass for St. Patrick’s Day.  Temperatures will mainly be in the 40s tomorrow, but a stiff northerly breeze puts wind chills in the 30s if you’re coming to downtown Indianapolis for the parade.  Expect intervals of sun and clouds early in the day with increasing sunshine by 5pm.

PLANNER TONIGHT RPM TUESDAY 7AM RPM TUESDAY 11AM ST PATRICK'S DAY PLANNER TUESDAY

The stiff northerly breeze makes it “feel” 30-40 degrees colder tomorrow than the balmy air of today.  If you’re coming to downtown Indianapolis for the St. Patrick’s Day we’re advising that you dress for 30s… which is what the wind chills be during the event.  Layer up and have a good time.

RPM WIND CHILL RPM TUESDAY 5PM

It will be a chilly start Wednesday morning with increasing cloud cover, with temperatures in the 20s.  Expect more clouds than sun, with highs in the range of 45-50 degrees.  We continue to keep a chance of showers in the Thursday forecast, though there is some uncertainty regarding timing and amount of moisture.  Some model guidance even suggests some flakes of snow are possible during the morning hours when surface temperatures are in the 30s.

RPM WEDNESDAY 5AM RPM WEDNESDAY 5PM RPM THURSDAY 7AM

Another friendly reminder that this is Severe Weather Preparedness Week in Indiana.  The state will perform a Tornado Drill twice on Thursday… one at 10:15am and the other at 7:35pm in the evening.  Take time to make a safety plan with your family or work this week.

HEADLINES

7DAY

Friday marks the beginning of astronomical spring with equinox occurring at 6:45pm.  It’ll definitely feel like spring to start the weekend with temperatures returning to 60 degrees or higher.  The month of March is noted for rapid temperature swings and we’ll see another impressive drop from Saturday to Sunday, when highs drop back into the lower 40s.

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Mar
15

Super Sunday Followed By First 70s Since Late October

Posted By · March 15, 2015 at 5:34 pm

What a fantastic way to wrap up the weekend!  A light wind, temperatures in the 60s and occasional high clouds paved the way for a pleasant Sunday.  But even warmer air arrives tomorrow.  Notice the 70s in St. Louis and that air mass spreads eastward Monday on a balmy breeze.

PLANNER EVENING

You’ll notice that breeze increasing from the southwest overnight and this will keep temperatures in the mid to upper 40s.

TEMP TREND MONDAY HIGHS MONDAY

This sets the stage for Central Indiana’s warmest day since late October.  We’re forecasting low to mid 70s area wide Monday afternoon… over 20 degrees above normal and not far from the record high of 79 set in 1945.  The only complaint tomorrow might be the breeze that will gust up to 20-30mph during the afternoon.

HEADLINES 2 RPM TUESDAY 7AM RPM TUESDAY 10AM

A cold front arrives Tuesday to deliver considerably cooler, albeit closer to normal, temperatures for St. Patrick’s Day.  Temperatures range from 45 to the lower 50s with intervals of overcast and sunshine.  The wind shift to the north may help drag down some lake effect sprinkles or showers… but we’re not anticipating much precipitation at this point.

RPM TUESDAY 5PM

PLANNER TUESDAY 7DAY

There is a chance of showers Thursday and Friday, but confidence is low on the later part of the 7 day forecast due to model divergence in outcomes.  Stay tuned for updates – Sean Ash

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Mar
13

Update On Flooding And Fog To Start Weekend

Posted By · March 13, 2015 at 7:05 pm

Rain continues to add up across Central Indiana with steady precipitation expected to continue into Saturday morning.  Many areas south of I-70 are nearing 1″ since midnight, and much of Jackson/Lawrence/Jennings counties are in the 1.75″ to 2.50″ range.  This is where recent snow melt, early rain this week and what’s occurring now maximizes the flood threat.

TEMPS WEATHER BUG RAIN REPORTS

Here’s a picture from Bedford and there other reports out of Orange and Washington counties of flooded streets too.  The East Fork of the White River down state may near moderate flood stage before the weekend is over.

FLOODING

Fog is also expanding over Central Indiana and reducing visibility to under a mile in some areas.  Please use caution if traveling this evening and note that visibility can change quickly.

VISIBILITY VISIBILITY 2 FOG HEADLINES

Rain continues into Saturday morning with an additional half inch to inch for areas along and south of I-70.  Rain tapers to spotty showers around midday tomorrow and we’re expecting a rather bright finish.

7DAY

The weekend finishes on a fantastic note.  Sunday may begin frosty but we expect ample sunshine and highs climbing to near 60 degrees.  The warmest air possibly since late October targets Central Indiana… when highs may go into the 70s.  A cold front arrives just in time to cool down St. Patrick’s Day in the mid-40s with breezy conditions.   A stronger push of colder air may arrive this time next week to possibly drop highs into the 30s.  We’ll fine tune in the days ahead.  Be safe this evening – Sean Ash

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Mar
13

Soggy Beginning To What Becomes A Sunny Weekend

Posted By · March 13, 2015 at 4:21 pm

***Flood Watch Southern Indiana Friday Until Saturday Afternoon***

As anticipated it’s been a wet day and much more rainy hours to go before this system departs.  We targeted southern Indiana for the heaviest rain amounts, and thus far that’s come to fruition.

WEATHER BUG RAIN REPORTS RADAR RAIN ESTIMATES

Lawrence, Jackson and Jennings counties are in the 1.50″ to 2″ range already… with another .75″ to 1.25″ possible between now and midday Saturday.  This area has the greatest probability of seeing Flash Flooding, and many rivers down there are under Flood Warnings.

FLOOD WATCH FLOOD WARNING RPM RAINFALL RPM FRIDAY 11PM RPM SATURDAY 5AM

Saturday begins soggy with rain likely until late morning.  Showers and clouds diminish in the afternoon and we’ll salvage a decent finish tomorrow with highs in the mid to upper 50s.  Temperatures tumble tomorrow night and with lows in the upper 20s and lower 30s we could see some frost developing by sunrise Sunday.

PLANNER SATURDAY MORNING RPM SATURDAY 1PM RPM SATURDAY 5PM PLANNER SATURDAY AFTERNOON

But Sunday will be very pleasant after the chilly start.  Expect plenty of sunshine and comfortable highs near 60 degrees.  We’re still on target for Monday being the warmest day of the 7 day forecast… and highs could possibly hit 70 degrees for the first time since October 28th.  Enjoy the warmth as cooler air return St. Patrick’s Day and below normal cold for the end of the week.  Be safe on the wet roads this evening – Sean Ash

RPM SUNDAY 7AM RPM SUNDAY 5PM

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Mar
12

Wet Friday Morning Commute

Posted By · March 12, 2015 at 11:44 pm

Rain arrives between 5am-7am and overspreads all of Central Indiana by 10am.  Initially light, rain intensity increases during the day Friday and varies between light to locally heavy.

HEADLINES RPM 10AM FRIDAY RPM 4PM FRIDAY PLANNER FRIDAY

Flood Watch continues for southern Indiana until 2pm Saturday.  This area has the highest probability of seeing 2″ to 3″ of rainfall… heightening the risk for street and river flooding.

FLOOD WATCH RPM RAINFALL RPM 6AM SATURDAY

Expect a soggy start to the weekend, but sunshine gradually emerges in the wake of this system late Saturday afternoon.  This paves the way for a beautiful Sunday.  After a chilly start, highs climb into the mid and upper 50s to cap off the weekend.  The warmest air arrives Monday when highs may hit 70 degrees for the first time since late October.

RPM 5PM SATURDAY HEADLINES 2 7DAY

This taste of warmth is short in nature with cooler, albeit closer to normal, air arriving for St. Patrick’s Day.  Get the latest on WTHR Sunrise beginning at 4am – Sean Ash

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