MORNING PREVIEW: Weather, Traffic Friday, Christmas Eve, December 24, 2021

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NWS FORECAST:

KORD | KPWK | Forecast Graph O’Hare

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 O’HARE FORECAST … 

Today: Occasional drizzle after 8am. Patchy fog. Otherwise, cloudy, with a high near 52. South wind 10 to 15 mph, with gusts as high as 25 mph.

Tonight: Occasional drizzle with a chance of showers before midnight, then rain likely, mainly between midnight and 5am. Patchy fog before 1am. Otherwise, cloudy, with a low around 41. South wind 5 to 10 mph becoming north northwest after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Christmas Day: A 50 percent chance of rain, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a steady temperature around 43. North wind 5 to 10 mph, with gusts as high as 15 mph.

Saturday Night: Partly cloudy, with a low around 30. North northeast wind around 5 mph becoming west in the evening. Winds could gust as high as 10 mph.

Sunday: Partly sunny, with a high near 43. West northwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.




WEATHER DETAILS

According to the National Weather Service Office Chicago, the weather pattern is setting us up for an unseasonably mild Christmas Eve, albeit a cloudy and somewhat dreary one.

Strong low pressure over the northern Plains this morning will shift into southern Manitoba into this afternoon. While doing so, it will lay out a trailing frontal trough of low pressure south- southward across the Upper Midwest and back into the central Plains. Southerly winds in advance of this feature will continue across our area through the day, resulting in a northward surge of an unseasonably warm and moist low-level airmass. While this warmer airmass will push temperatures up into the low 50s by midday, the accompanying high dew points (into the upper 40s to the lower 50s) will result in a persistent area of low stratus, occasional drizzle and even fog overhead through the day. Surface winds will likely become a bit gusty this Friday afternoon, though the low clouds may limit the magnitude of the gustiness some, especially over far northern Illinois.

As we head into tonight, the mid-level impulse currently shifting into southern CA is forecast to shear out and race to the east- northeast into our region. This should be our next rain maker for tonight into early Christmas morning. While the shortwave will deamplify as it shears eastward, guidance is in good agreement in developing a healthy surface wave along the quasi- stationary front and that low tracking across our County Warning Area tonight. While some rain is a good bet across a good portion of the area tonight, it appears the best chances will primarily be along and south of I-88, where a quarter to half inch of rain is likely.

We will dry out areawide by Christmas afternoon. Expect temperatures to remain on the mild side, with highs generally in the 40s.

— NWS Chicago with CARDINAL NEWS edits

DEW

Condensation with fog.

Weather Radar shows scattered precipitation mostly in south-central Wisconsin in a clockwise direction at 7:10 a.m.

Is it cloudy over Chicago?

Arlingtoncardinal.com/clouds | Arlingtoncardinal.com/temps

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WEATHER OBSERVATIONS

NOTE: As of Nov. 23, 2021, National Weather Service feeds with hourly observations are broken. New hourly observations are stalled. A link in the most recent tweet, refers to an updated table with hourly observations with the correct data.

NWS CHICAGO

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