Area Forecast Discussion
Issued by NWS Chicago, IL

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000 FXUS63 KLOT 222326 AFDLOT Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 626 PM CDT Thu Aug 22 2019 .SHORT TERM... 248 PM CDT Through Friday night... There are no weather concerns for most of the area through Friday night. The only concern is at the beaches, where brisk northeasterly winds are likely causing dangerous swimming conditions due to high waves and strong currents. A Beach Hazards Statement is already in effect through 10am Friday and may need to keep it going through later in the day, as winds are progged to uptick again on Friday afternoon through early evening. Currently not anticipating needing a Lakeshore Flood Advisory, as waves thus far have topped out around 5 feet at the Wilmette buoy, but will certainly monitor observations. Outside of this, high pressure north of the Great Lakes with ridging extending down to our area will gradually settle south, keeping dry and comfortable conditions in place, with seasonably cool nighttime temperatures. Skies going mostly clear tonight and lighter northeast winds will support lows in the 50s outside of Chicago and lower 60s in the city. Favored locations along and west of the Fox Valley will likely dip into the lower 50s. On Friday, the diurnal Cu/strato-Cu field inland may be a little less pronounced than today. Slightly cooler thermal profiles will yield highs in the mid to upper 70s inland and lower-mid 70s lakeside, with very low dew points for late August (lower-mid 50s). We should be able to shave a couple degrees off tonight`s lows for Friday night`s lows as high pressure center draws closer. This means a few of the favored cool spots may even drop to 48-49 degrees. Castro && .LONG TERM... 151 PM CDT Saturday through Thursday... Surface high pressure is expected to dominate across the Great Lakes region through much of the upcoming weekend. Overall, this is expected to result in pleasant (early autumn-like) weather across the area. High temperatures are expected to be mainly in the 70s, with overnight lows in the 50s Saturday night. Winds will primarily be onshore, especially Saturday. Early next week forecast guidance continues to be in good agreement with a well defined mid/upper level trough digging over the Upper Midwest. With an associated surface frontal trough likely to approach the area later Monday and Monday night, we will have some decent chances for some showers and thunderstorms. However, these chances should abate quickly during the day Tuesday as the surface front shifts east-southeast of the area. This looks to result in mainly dry and pleasant weather with seasonal temperatures again for much of Tuesday and at least Wednesday. KJB && .AVIATION... For the 00Z TAFs... Northeast winds and VFR conditions will prevail through the TAF cycle. After easing a bit this evening, look for winds to pick up a bit again Friday morning through the afternoon. - Izzi && .LOT WATCHES/WARNINGS/ADVISORIES... IL...Beach Hazards Statement...ILZ006-ILZ014 until 7 PM Friday. IN...Beach Hazards Statement...INZ001-INZ002 until 7 PM Friday. LM...Small Craft Advisory...nearshore waters until 10 AM Friday. && $$ VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE) FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT: WWW.FACEBOOK.COM/NWSCHICAGO WWW.TWITTER.COM/NWSCHICAGO WWW.YOUTUBE.COM/NWSCHICAGO is the U.S. government's official web portal to all federal, state and local government web resources and services.