Wind Advisory/Lakeshore Flood Warning cancelled for Chicago/Cook County – High Wind Warning/Lakeshore Flood Warning continue in Northwest Indiana
Update 2:45PM CDT…
The Wind Advisory and Lakefront Flood Warning have been cancelled for Chicago/Cook County. The Wind Advisory has been discontinued for Lake County, Illinois and Benton, Newton and Jasper Counties in Indiana, as winds have dropped from earlier level, now running north to northwest 15 to occasionally 30 miles per hour and expected to continue diminishing this evening. However winds are still expected to gust over 50 miles per hour along and inland of the lakefront in Lake and Porter Counties in Indiana and the High Wind Warning countinues there until 7PM, and the Lakefront Flood Warning is still due to expire around midnight tonight.
Update 11AM CDT…
The Lakeshore Flood Warning remains in effect for Chicago/Cook County until Midnight calling for 10 to 15-foot waves driving minor flooding and erosion along the lakeshore into the afternoon. The Lakeshore Flood Warning for flooding and erosion due to 15 to 20-foot waves remains in effect until around midnight tonight for the lakefront areas in Lake and Porter Counties in Indiana.
The High Wind Warning has been lowered to a Wind Advisory in effect until 7PM CDT this Thursday evening for Chicago and Cook County as winds have dropped off a bit – the forecast is for northerly winds 20 to 30 miles per hour with gusts to 45 or 50 miles per hour . The High Wind Warning for 30 to 40 mile per hour winds gusting to 50-60 miles per hour remains in effect for Lake and Porter Counties in Indiana until 7PM CDT. A Wind Advisory also remains in effect for Benton, Newton and Jasper Counties in Indiana until 7PM CDT.
Update 5:45AM CDT...
The High Wind Warning for winds 30 to 40 miles per hour gusting to 50-60 miles per hour and the Lakeshore Flood Warning for 15 to 20-foot waves and possible flooding right along the shoreline continues for Chicago and Cook County until 4PM CDT Thursday. The High Wind and Lakeshore Flood Warnings will extend a little longer until 7PM CDT along the Lake and Porter County, Indiana shoreline.
Farther north and east, a Wind Advisory for winds 20 to 30 miles per hour gusting to 40-45 miles per hour will continue for Lake County Illinois and Milwaukee, Racine and Kenosha Counties in Wisconisn until 4PM CDT and in Newton, Benton and Jasper Counties and farther east in Indiana until 7PM CDT.
Accumulating wet snow will primarily occur in Lower Michigan where a Winter Weather Advisory calls for 1 to 4-inches of snow today – greatest amounts of 5 to 7-inches in the east-central portion of the state – ending from west to east today/tonight.
As the center of a deepening low pressure system tracks through central Indiana, strengthening northeast to north winds will increase prompting a Wind Advisory for greater than 40 miles per hour into early Thursday morning along the Illinois Lake Michigan shoreline into northwest Indiana.
Strongest winds possibly gusting in excess of 60 miles per hour will occur Thursday over the lake and just inland, prompting a High Wind Warning (note gold-shaded area on highlighted map) beginning at 4AM CDT for the portion of Chicago and Cook County around the south end of the lake into Lake and Porter Counties Indiana immediately adjacent to the lake – coinciding with the High Wind Warning, a Lakeshore Flood Warning (initiating at 4AM CDT) calls for damaging 15 to 22-foot waves causing flooding and severe erosion along the lakefront into Thursday evening. Interests along the lakefront should take immediate precautions to protect property and individuals driving, especially west-east-traveling high-profile vehicles such as vans, buses, trucks should try to delay plans or drive very defensively for the next 24 hours or so.
As the storm system moves off to the east, winds will gradually diminish later Thursday night/early Friday.
Another aspect of the storm system is the possibility of cold rain changing over to wet snow as colder air entrains into the low pressure system tonight and Thursday. Indications are that this changeover may well take place with only minor accumulations, except from Chicago south into northwest Indiana where accumulations of a few inches could occur on grassy surfaces or make driving slippery in some areas.
For those planning travel into Lower Michigan the next 24 to 36-hours, it will be bad enough getting around the south end of the lake due to the strong winds and slushy wet snow, but be aware that Winter Storm Advisories and Warnings are in effect for 2 to 4-inches of snow over southern Lower Michigan and 6-9 inches farther north.