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Mar
15

Rumbles Of Thunder Tonight?

By · March 15, 2013 at 2:11 pm

We want to give you a heads-up that scattered storms are possible overnight into the predawn hours of Saturday.  Most of the evening will be quiet and just cloudy…but all bets off for dry weather after 9pm.plannerpm_2

Future Trak13 shows areas of rain/thunder quickly erupting after dark as a  strengthening low-level jet creates “elevated” instability across central Indiana.   This will allow some thunder and the possibility of “hailers” to develop along/south of the I-70 corridor between 10pm-5am.

RPM RPM_1

The Storm Prediction Center (CLICK TO ENLARGE image) has highlighted south-central Indiana for a small risk of hail overnight.

SPC

These will be quick-hitters…but could be loud!  Don’t be surprised if thunder wakes you overnight.  A few showers may linger around early Saturday morning, but the majority of tomorrow will be dry.

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A stalled frontal boundary along the Ohio River poses significant forecast challenges for the second-half of the weekend.  North side of the front will be a winter air mass.  South of this boundary will be more like spring.  The battle ground of air masses will be fought along the I-70 corridor…producing various types of precipitation late Sunday.RPM_2

Return moisture and an approaching disturbance will set-off a mixed bag of precip along the Ohio River Sunday morning.RPM_3

By late Sunday afternoon the aforementioned front will buckle northward…pushing the snow/sleet/rain axis into the viewing area.  A degree or two will dictate which precip type you see at any given time.  I don’t anticipate widespread accumulation… but it’s conceivable “some” areas could see heavy enough to snow to accumulate on the grass.  Subject to change.RPM_4 RPM_5 RPM_6

From top-to-bottom the atmosphere warms enough to transition into all rain Sunday night-Monday morning.850MB

As this storm pushes eastward the stage is set for another prolonged spell of colder than normal weather.  Long-range guidance shows no signs of spring warmth in the next 8-10 days.850MB_2

This means 30s and 40s return for highs most of next week.7day

Please don’t shoot the messenger as the wait for spring continues.

Thanks for reading the blog.

Sean Ash – Twitter / Facebook

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