Take an average month of rain squeezed into 24 hours, on top of saturated ground and you have the recipe for a moderate to high risk of flooding in Central Indiana.
Since 1871 in Indianapolis there have been only FOUR days with rainfall of 2″ or greater in the month of December. The daily record for the month is in serious jeopardy tomorrow…with multiple model outputs suggesting 3″ or greater for the city. The expected heavy rain, snow melt and frozen ground raise serious concerns about river and urban flooding this weekend. All of the area is under a Flood Watch until 7am Sunday. Here is a link to the National Weather Service Indianapolis with detailed river level information: http://water.weather.gov/ahps2/index.php?wfo=ind
There is also a risk of severe storms Saturday afternoon and very early Sunday morning… including damaging wind and tornado spin-ups. This risk area may be pushed farther north in future outlooks. Be weather aware all weekend long.
If you’re shopping this evening expect drizzle and showers to increase before midnight.
Rain becomes heavy by midday Saturday and flat-out torrential during the afternoon/evening hours… with rain rates of .50/1″ per hour very possible.
Temperatures briefly surge into the mid-50s Sunday morning (while you’re sleeping) before tumbling into the 30s with snow showers behind a cold front Sunday afternoon.
Arctic air squeezes out snow showers Monday and sends temperatures down to near the single digits Tuesday morning.
Keep your fingers crossed those showers will be vigorous enough to coat the ground by Christmas morning. There’s also a chance of light snow returning later Christmas day, which will be followed by a cold finish to the holiday week. Thanks for reading the blog and have a safe weekend – Sean Ash