COLDEST AIR SINCE FEBRUARY 2011
Central Indiana shivered early Wednesday morning as low temperatures dipped into the single digits. Officially the low was 5° for the city of Indianapolis while outlying area were even colder. Skies cleared late Tuesday night and along with a heavy snow pack the temperatures dove. This was the coldest air since the -1° on February 10,2011. The coldest reported temperature came in at Zionsville with a low there of -1°
A band of clouds arrived by mid afternoon slowing the temperature rise Wednesday. The high rebounded to 22° at 4:02PM. This was the coldest afternoon since the high of 17° on February 9th, 2011.
QUICK DROP TONIGHT
Skies will be clear early tonight and will allow the temperatures to drop off into the single digits away from the city early in the night. A few clouds will return toward sunrise bringing a stop to the drop and actually a slow rise on the thermometer toward daybreak.
MILDER PATTERN DEVELOPING
The northern branch of the Jet Stream will retreat in the next few days opening up the potential for a warm up. Southwest winds will kick in Thursday as a weak system passes to our north. Another system is due in Saturday night and Sunday with a chance of snow but the frigid air is retreating. A flow from the Pacific Ocean will spread east by early next week promising for milder air but there is hitch. Heavy snowpack will modify the warm up and possible create a low-level temperature inversion. The expansive snow field will lock colder air at the surface while a mile up the air is warming well above freezing. This temperature inversion is likely to develop Tuesday and Wednesday next week. It will be a set up that often brings fog, damp conditions and possibly freezing drizzle in the morning. Stay tuned.