Indiana Weather Outlook 12-20-17

Short term offers no change this morning. We have nothing different for today, tomorrow and even Friday. The next two days we see a similar pattern to yesterday, with a mix of clouds and sun. However, a cold front did slip through overnight, so temps may be slightly colder today than yesterday. On Friday we have clouds thickening up, and we can’t rule out some minor spits and sprinkles giving no more than a few hundredths to a tenth over about 40% of the state.

Friday night gets a lot more active and that pattern continues through Saturday and even into early Sunday. Rains look to be very impressive and we are bumping up our top end of our rain range. WE are now calling for weekend rains of .25”-1”, but the heavy rains staying south, near the river, and particularly into KY. These rains do not get to push north until they are farther east and make a run at Ohio. The front isgfs_tprecip_indy_18.png impressive and it has good moisture flow ahead of it. The map below shows rain totals through Saturday mid-afternoon.

AS cold air blasts into the state on Sunday, we see some snow developing. However, we think the heaviest snow stays farther south and east of us. For now, we like coating to an inch or two over about 60% of the state. Better snow is possible farther east. We will be waiting to put out our official snow totals until later tomorrow afternoon. But, it continues to look like we dodge a big bullet for bad snow on Christmas Eve through Christmas Day. Christmas afternoon should be mostly dry and sun should try to come out. However, the cold air continues to build, and we will be looking at brutal wind chills Christmas night.

We are dry and very cold for Tuesday through Thursday. Temps will be well below normal. Then a clipper system rotates through the state for Thursday night and Friday, bringing potential for several inches of snow. This will be ahead of a stronger system lifting out of the southern plains for the start of New Year’s weekend. Temperatures remain very cold right on through into the New Year.

In the extended period, we have another clipper for late the 1st into the 2nd that brings snows out of the Great Lakes right across the region. WE follow that with a cold front for the 3rd into the 4th that can also trigger several inches of snow. The cold holds through at least the first third of January.


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