NWS FORECAST: KORD | KPWK | Forecast Graph O’Hare
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O’HARE FORECAST …
Today: A chance of sprinkles before 10am, then rain, mainly after 1pm. High near 55. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight: Rain. Low around 53. Northeast wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday: Rain. High near 55. North northeast wind around 15 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
A line of rain showers was easing into Chicagoland from the south early this morning and kicks off what will likely be a rather rainy Thursday. These showers are tied to a large system of low pressure still working its way through Southern Missouri. As the low pressure system continues along its east-northeastward trek through the day, rain coverage will increase over the area thanks to some hefty southerly low and mid-level flow on the lee side of the associated trough axis.
This afternoon into the evening appears this be the timeframe of highest rain coverage, including moderate rain beginning in Arlington Heights about 3 PM after a period of sprinkles and lighter rain that may begin as early as 9 AM. Dynamics necessary for thunderstorms appear minimal given our orientation to the storm’s center and associated baroclinic zones although periods of moderate rainfall are expected along with the occasional pocket of heavy rain.
Rain will continue through the night tonight and through much of tomorrow (moderate rain is expected to end in Arlington Heights about 6 PM Friday). Thick, low cloud cover and added moisture will keep temperatures rather steady over the next couple of days with highs spread across the 50’s both Thursday and Friday and low temperatures Friday morning in the upper 40`s and lower 50`s. Friday afternoon and evening will feature wind gusts likely over 34 MPH along the lake and in the far west suburbs. This will result in Lake Michigan waves of 7 to 8 feet and the potential for some minor lakeshore flooding. Waves primarily under 10 feet will inhibit the need for a lakeshore flood advisory lest winds in the forecast ramp up between now and then.
Rain chances will begin to subside Friday evening from west to east with the storm system continuing to propagate eastward into Appalachia. The storm’s departure will bring steady northwesterly low level flow which will aid in the production of some lake-induced showers Friday evening into Saturday morning. The chance for lake effect showers should be confined to areas in and just south and southwest of the metro area as well as areas of NW Indiana, although the greatest potential exists for those in counties situated along the lakefront. — NWS Chicago with edits by CARDINAL NEWS.
DEW
No dew on grass or vehicles under cloudy skies.
RADAR …
Weather Radar shows a light band of precipitation north of a line from Rockford to Kankakee moving north at 9:00 AM. A second larger area of precipitation along a line from Davenport to Peoria to Champaign is moving north at 9 AM.
Arlingtoncardinal.com/clouds | Arlingtoncardinal.com/temps
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WEATHER OBSERVATIONS
NWS CHICAGO
TRAFFIC ALERT #1
Vehicle fire on I-90 WEST near Mile Post 70 (near Meijer) with firefighters from Arlington Heights and Wood Dale (tender/water tanker) assigned to extinguish the fire.
I-90 Westbound – VEHICLE FIRE – East of IL-58 (Golf Rd) – MP 69.8 – 1 right lane blocked of 5
— Tollway Trip 90 (@I_90_Tollway) October 28, 2021
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