NO TORNADO WARNING ISSUED; IT CAN HAPPEN WITH A SMALL TORNADO
A tornado was suspected to be to blame for major damage to some Waukegan businesses Tuesday night. CBS 2’s Mary Kay Kleist and Charlie De Mar report.
The National Weather Service confirmed Wednesday that a tornado measuring EF-0 to EF-1 touched down in Beach Park and Waukegan Tuesday September 3, 2019 about 6:40 p.m.
The National Weather Service Chicago reported yesterday that a Supercell Storm (rotating storm) strengthened over north Waukegan about 6:40 p.m. and that visual evidence indicated a tornado likely occurred. The National Weather Service is investigating the scene today, Wednesday 4, 2019, where a very narrow damage path occurred in north Waukegan over land to the shoreline of Lake Michigan.
Video of a rope-like tornado was posted on social media by Jose Flores (see below) near the intersection of York House Road and Lewis Avenue. Images captured at the Waukegan airport by Craig Mivshek and near the Lake Michigan shoreline by Spencer Dant also showed a tornado.
Normal weather radar did not detect a hook echo, but radar in velocity mode did indicate a couplet — a red patch going away from the radar source and a green patch going toward the radar.
No Tornado Warning was issued for Lake County during the Tuesday evening period. However, the NOAA/NWS Storm Prediction Center indicated — at 2:56 p.m. Tuesday — a tornado risk of 5% for a tornado within 25 miles of all of northeast Illinois, covering the time period when a supercell crossed over Waukegan Tuesday night about 6:40 p.m.
Damage from the tornado included property damage of a commercial buildings, a flipped car, tree damage — especially at the Lyon Woods Forest Preserve.
The National Weather Service said a `probable` tornado was reported in Waukegan Tuesday evening.
National Weather Service investigators plan to tour north suburban Waukegan on Wednesday to confirm whether a tornado touched down Tuesday night. Meantime, homeowners are working to clean up the damage from the storm. CBS 2’s Mugo Odigwe reports.
The National Weather Service said there was a possible tornado in Waukegan, Illinois Tuesday evening, September 3, 2019.
SPC MD 1922: MD 1922 CONCERNING SEVERE POTENTIAL…WATCH POSSIBLE FOR NORTHERN/CENTRAL IL…NORTHWEST/CENTRAL IN Mesoscale Discussion 1922 NWS Storm Prediction Center Norman OK 0354 PM CDT Tue Sep 03 2019 Areas affected…Northern/Central… https://t.co/GDpsqFUrNc pic.twitter.com/ND8NyglZxX
— Cardinal Weather (@CardinalWeather) September 3, 2019
NOAA/NWS Storm Prediction Center indicated a tornado risk of 5% of a tornado within 25 miles in the red area, covering the time period when a supercell crossed over Waukegan. Tuesday night about 6:40 p.m. pic.twitter.com/iSSQjsTaXW
— Cardinal Weather (@CardinalWeather) September 4, 2019
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Mesoscale discussion just prior to the storm …
Mesoscale Discussion 1922 NWS Storm Prediction Center Norman OK 0354 PM CDT Tue Sep 03 2019
Areas affected…Northern/Central IL…Northwest/Central IN
Concerning…Severe potential…Watch possible
Valid 032054Z – 032300Z
Probability of Watch Issuance…40 percent
SUMMARY…Increased thunderstorm activity is anticipated across the region over the next few hours. Some severe storms are possible.
DISCUSSION…Recent surface analysis reveals a somewhat complex pattern across northern/central IL and northwest/north-central IN. Two outflow boundaries are apparent. One of these boundaries extends from about 35 mi north-northeast of LAF southeastward to the central IN/OH border. The other extends from near PPQ (in far west-central IL) northeastward into northwest IN, where it intersects the first outflow boundary mentioned. Air mass in the vicinity of these boundaries has not fully destabilized, with at least minimal convective inhibition still in place. Even so, increasing forcing for ascent is anticipated as a strong shortwave trough approaches. This strong forcing is apparent in the banded structure of the cloud features and recent radar signatures across northeast IL as well as storm development across west-central IN.
Expectation is for the increased forcing for ascent, both attendant to the shortwave trough and along the cold front (which remains farther west from southern WI southwestward across IA), to eventually result in thunderstorm development across northern/central IL. Given the favorable environment, some severe storms are possible.
The ongoing elevated activity is expected to persist across central IN before then moving into the more stable air mass to the north of the outflow boundary across northeast IN/northwest OH. Isolated hail and/or a strong wind gusts are possible with this storm.