SUNNY WARM STRETCH
The run of sun and warmth continued Friday with the warmest day here in the past eight. The official high was 81° after another chilly morning. Afternoon humidity at only 28 percent. That means dry air and that favors big temperature swings from sunrise to sunset. Once again, many outlying thermometers jumped 30 to 34 degrees since sunrise. In Muncie, the low temperature dipped to 45 Friday morning and reached 79° by late afternoon. The jump was 33° in Columbus, 32°, Peru, 31° Bloomington and 27 degrees in the city. Its been seven straight days with sunshine and that streak will survive one more day.
September 2013 right now ranks 28th warmest with a average temperature of 70°. Two weeks ago, we were breaking record high temperatures in the middle 90’s! Rainfall on Sept. 19 of more than 1″ has helped but this month will end drier than normal if we do not receive more than a half inch of rain on Sunday. The past four months have all ended below normal rainfall. It will be close with rain coming here Sunday.
COLD FRONT SUNDAY
The sunny, dry streak ends Sunday as a cold front pushes into the state around daybreak. Clouds will thicken Saturday night and showers will not be far behind. The rain should arrive before sunrise Sunday but will not last all day long. Showers will diminish from west to east by early afternoon with clouds decreasing by mid afternoon. Rainfall from this front could reach a half-inch. A run of seven various rainfall bearing computers averaged in at .46″. the range is as little as .16″ to as much as .83″.
A WARM OCTOBER OPEN
Only 32 October’s have opened at 80° or warmer and it looks like 2013 will be number 33. The forecast of 81° would make this the warmest start to October in six years. Enjoy the warmth – with possibly three days of 80s to start the month, the average date of the last 80° day is Oct. 7.
CHILLY CHANGE ON THE WAY
Circle Oct. 5, on the calendar. Overnight computer runs for three straight days show coolest air of the season coming. The image below in a forecast from the European Medium Range model at 18,000 feet. The upper air flow is a cool one with chilly air diving into the eastern U.S. Gusty t-storms could accompany a strong cold front a week from today, then temperatures drop. Afternoon high temps in the 50s and area wide low temps in the 30s may be in the offing.