Thursday Afternoon, October 18, 2018
Chief Meteorologist Jason Simpson
Clouds thin tonight, Friday looks warmer, and rain returns soon
A persistent, narrow band of clouds over North Alabama kept the temperature a little cool this afternoon; those clouds thin tonight, and it stays cool and dry. Expect lows in the upper 40s and lower 50s by Friday morning. We’ll stay dry through most of the day – and most of the evening – Friday, but some showers are possible especially over Northwest Alabama and Southern Tennessee after 7-8 PM.
That could mean some spotty showers for high school football games this week, but any rain looks very light and inconsequential unless you happen to be sitting outside in it! Be prepared for some light rain: jacket, poncho, umbrella, etc. Rain looks much more likely overnight into Saturday morning, and then it turns downright chilly for Sunday!
Weekend specifics: Saturday starts out gloomy, cool and damp. We have adjusted the timing on the forecast now to keep rain around a little longer through mid-morning Saturday; showers finally move out completely around lunchtime. That will keep it cool: highs in the low-60s.
Total rainfall looks relatively light; however, some spots could overachieve as is typical. Average rainfall amounts end up around 0.25” to 0.50” with the possibility of up to one inch of rain.
Sunday looks chilly! We’ll start out in the mid-30s Sunday morning with a brisk north-northwest wind up to 10 miles per hour making it feel colder than that. Temperatures slowly climb to around 60ºF in Huntsville Sunday afternoon; some of the higher terrain even in Madison County and especially in Northeast Alabama and Tennessee won’t get above 55ºF!
Quick changes: As quickly as it comes in, the colder air leaves early next week. Monday morning’s low drops into the upper 30s; frost is possible in the usual cold spots where the wind goes calm. It’s up to 48ºF by Tuesday morning and in the 50s Wednesday morning. Daytime highs also recover to the 70s by the middle of the week.
A slow-moving yet fairly significant storm system develops over the South late next week; that will give us a chance of some on-again, off-again rain starting Wednesday lasting through Thursday, Friday and Saturday.
All signs point toward another significant push of colder air (maybe cold enough for a freeze) for the last few days of October!
Tennessee Valley Forecast:
THIS EVENING: Partly cloudy, cool and dry. A light northeast wind. Temperatures drop from the 60s into the 50s after 7 PM.
OVERNIGHT: Fair, cool and dry. Low: 51. Wind: Light East-Southeast.
FRIDAY: Some morning sunshine, clouds thicken in the afternoon and evening. Showers are possible Friday night mainly over northwestern Alabama. High: 75. Wind: SSW 6-12. Rain: 20% (after 8 PM).
FRIDAY NIGHT: Cool and damp with showers increasing between 10 PM and midnight. More rain likely through Saturday morning adding up to around 0.25” on average. Low: 58. Wind: S 3-9. Rain: 80% overnight.
SATURDAY: Clouds, and generally light rain likely in the morning. Showers taper off between 9 AM and noon. Partly to mostly cloudy after the rain ends. High: 63. Wind: NW 5-15. Rain: 60% (before 9 AM).
SATURDAY NIGHT: Clearing and turning much colder! The wind likely prevents frost. Low: 37. Wind: N 6-12.
SUNDAY: Mostly sunny and cool! A cold morning in the upper 30s, and a cool breeze in the afternoon. High: 60. Wind: NE 5-10.
SUNDAY NIGHT: Cold and dry. Some patchy frost *might* occur in the usual cold spots by daybreak Monday. Low: 39. Wind: Light NE.
MONDAY: Mostly sunny and milder; temperatures still well below average for mid-October. High: 68. Wind: SE 5-10.
TUESDAY: Fair and a little warmer. High: 72. Wind: SW 5-10.
WEDNESDAY: Increasing clouds; some showers possible in the late afternoon and evening. More rain likely late Wednesday night into Thursday. High: 74. Wind: SE 6-12. Rain: 30% (late).
THURSDAY: Cloudy, breezy, damp and cool. Showers likely throughout the day. High: 60. Wind: ESE 7-14. Rain: 50%.
FRIDAY: Another cool, damp day. Showers still possible. High: 59. Wind: NE 7-14. Rain: 50%.
SATURDAY: Rain still possible with a slow-moving storm system. Cloudy, damp and cool. High: 64. Wind: SE 5-10. Rain: 50%.