Sunday October 17 2021 Forecast (7:56AM)

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DAYS 1-5 (OCTOBER 17-21)

A strong cold front moved offshore during the early morning hours and has delivered an air mass that puts an end to our mild and at times muggy pattern. The feel of the season arrives today and will remain with us for a few days, courtesy a west and northwest flow between low pressure in eastern Canada and high pressure moving from the Great Lakes through the Ohio Valley. An upper level low pressure trough moving across the Northeast. The trough will be responsible for passing clouds both today and Monday, with a few pop up showers possible especially today. The trough will move far enough away for fewer clouds and no shower threat as we head toward midweek, and as high pressure slips off to the south, we’ll experience a temperature moderation especially by Wednesday and Thursday. By later Thursday, low pressure will be moving from the Great Lakes into southeastern Canada and a cold front will be approaching by that evening or night time with a rain shower threat.

TODAY: Sun/cloud mix. Slight chance of a brief passing shower. Highs 60-67. Wind W 10-20 MPH, higher gusts.

TONIGHT: Partly cloudy. Lows 42-49. Wind W 5-15 MPH, higher gusts.

MONDAY: Sun/cloud mix. Highs 57-64. Wind W 10-20 MPH, higher gusts.

MONDAY NIGHT: Mostly clear. Patchy frost possible interior lower elevations. Lows 38-45. Wind NW 5-15 MPH but may drop to near calm in valley areas.

TUESDAY: Mostly sunny. Highs 58-65. Wind NW 5-15 MPH.

TUESDAY NIGHT: Clear. Patchy frost possible interior lower elevations. Lows 37-44. Wind W under 10 MPH.

WEDNESDAY: Mostly sunny. Highs 60-67. Wind W up to 10 MPH.

WEDNESDAY NIGHT: Clear. Patchy ground fog interior low elevations. Lows 41-48. Wind WSW under 10 MPH.

THURSDAY: Mostly sunny to partly cloudy. Chance of rain showers eveing or night. Highs 62-69. Wind SW 10-20 MPH.

DAYS 6-10 (OCTOBER 22-26)

A frontal boundary may still be passing through the region early October 22 with a rain shower threat as low pressure pulls through eastern Canada. High pressure to the west and low pressure to the northeast means a gusty northwesterly air flow and cooler air coming in during October 23-24 and cannot rule a pop up instability shower in otherwise a dry weather pattern. High pressure is expected to bring fair and tranquil weather October 25-26.

DAYS 11-15 (OCTOBER 27-31)

High pressure should be in control early and again late period with an unsettled weather threat mid period. Watching for the potential evolution of a blocking pattern with high pressure to the north and low pressure to the south, but not sure how quickly this takes place, if it takes place…

20 thoughts on “Sunday October 17 2021 Forecast (7:56AM)”

  3. According to Dave Epstein, still no frost anytime soon but “maybe” the last week of this month. He also noted that there will be no rain for the next 10-14 days BUT Kelly Ann on Ch. 5 has Friday as showery all that day.

      1. The frost is for the western suburbs from 128/495 and even there the frost won’t be heavy enough to kill any mosquitoes.

        1. Yes, it is. It was why I wondered if Dave Epstein’s comment re Frost was just for Boston area. You are right that a frost rarely is the end but can kill some. We need a heavy freeze.

  5. I have not seen any photos or discussion of the potential tornado in Dalton last night. If it turns out to be a tornado, it won’t be the first time for Dalton. I’m curious as to whether the topography around the town creates some form of favorable path or just coincidence

  8. Spectacular day.

    Temp is 61 with a 44 DP. There is a nippy breeze. Even next to the fire, I’m thinking I may need more than a tee shirt

  9. It is an absolutely beautiful late afternoon for some football. The breeze made tailgating a little tough at times, and based on warmups it may be a factor with some of the field goal kicking, especially longer attempts.

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