Protective Intelligence · Week Ahead · No. 10

Chicago Week Ahead Security Brief: Halloween Week, October 26–November 1, 2026

An open-source read on how scheduled events, closures, weather, aviation and police notices constrain movement across the Chicago metropolitan region from Monday 26 October to Sunday 1 November.

Shading counts the CPD pattern alerts that name each district, published 26 September to 25 October 2026, the 30 days before the window. Districts are those Week Ahead No. 9 read from each alert, or, for eight alerts, those the printed alert itself states; the Public Transportation Section alerts carry the district No. 9 read from them or the one their printed alert states.^{17, 18, 19} The layers show full street closures from City permits and the located venues, gatherings and works listed in sections 03, 04 and 06.^{17, 2, 23} One sexual-offense alert is listed in section 05 and is not counted in the shading. The Closures column counts distinct full-closure permits with a row in the district at any point in the window; most are utility and construction openings in the public way, and on Saturday 31 most are block parties.²

Every district, the same facts as text

Alert counts are of CPD publications naming the district, not of offenses. A listed district is not a place to avoid. The Upside Down Halloween Parade at Washington Grove (Park District permit, Friday 30 and Saturday 31, tentative) is not placed in a district; the record prints no address.²⁴

Ratings score constraint on movement, not danger.

Reading the capacity figures. Every figure below is a venue maximum, not a ticket count, an attendance forecast or a prediction.

This edition publishes on Tuesday 27; Monday 26 had passed and is not re-forecast. Weather and aviation are as re-read at 09:30 CDT on Tuesday, and the CPD feed at 08:48 CDT.^{14, 11, 17}

Saturday 31 is the day that most constrains movement. 285 special-event full-closure permits are active that day, 273 of them block parties; Pilsen streets close from 04:00 CDT for the 5K with three bus reroutes; Columbus and Balbo Drives close from 05:00 CDT ahead of Sunday’s race; and from 18:00 CDT Halsted Street is cleared for the 19:00 parade while the Wrigleyville crawl holds Clark Street, with Rod Wave at the United Center at 20:00 CDT.^{2, 7, 1, 8, 9} Sunday morning follows directly, with the remaining Grant Park drives closed for the Skechers Hot Chocolate Run 26 from 02:00 CST on the race permit.^{7, 29} On Wednesday 28 in the evening the Bulls play the United Center from 19:00 CDT and the Fire FC match kicks off at Soldier Field at 19:30 CDT, by the club’s listing; the two venues are 3.23 miles apart and both served by the Green Line.^{5, 6, 3, 4, 10}

307 special-event permits touch the window; 283 are block parties, and 273 block-party full closures fall on Saturday 31.^{7, 2} Event closures remove a through route on two days: N Halsted Street from 3200 to 3600 N and N Clark Street from 3450 to 3600 N on Saturday 31, and the Grant Park drives, including Columbus Drive from 100 to 1200 S, on Sunday 1 November.⁷ Standing construction holds southbound State Street from Wacker to Randolph and Lake Street from Dearborn to Wabash to 31 December, with overnight full closures of State Street to 31 October, and Milwaukee Avenue from Lake and Canal to Fulton to 30 October and 3 November.² The DuSable Lake Shore Drive river bridge permit prints the night of Thursday 29 as a backup date.⁴⁹

Permit records show filings, not street conditions, and they lag emergency work.

33 alerts were published from 26 September to 25 October. 32 are counted: 24 that Week Ahead No. 9 read and printed, whose districts, series, patterns and references are carried from No. 9, and 8 read from the printed alert itself: P26-3-039 (19th), P26-3-040 (12th), P26-2-017 (22nd), P26-3-041 (1st), P26-5-020 (25th), 26-CWP-029 (17th, 24th, 25th), P26-1-077 A (3rd), JK449694 (6th).^{17, 18, 19} By type, burglary is the largest group, 11, followed by aggravated battery, 9, robbery, 6, and theft, 2; 26-CWP-028, whose heading reads armed robberies but whose body describes business burglaries, is counted as burglary, as in No. 9. The 1st and 6th Districts carry 5 each, the 7th, 12th and 18th 4 each, and the 2nd, 14th and 25th 3 each. Seven counted alerts were published after No. 9’s alert window closed on 18 October. One alert is listed below and not counted: JK443146, a public indecency alert, under the standing practice for sexual-offense alerts.^{17, 18, 19} Alert volume measures how often the Department publishes a notice, not how much crime occurred.

Published times are CDT, from the Department’s news feed. Rows marked “printed alert” show the district, pattern, incidents and reference as the alert itself prints them, and each printed alert date matches its feed date; where the feed title prints a different reference, both are shown. Rows with no mark are as Week Ahead No. 9 printed them from each alert (SECONDARY, not re-read for this edition).^{17, 18, 19}

Offender descriptions, taken from the eight counted alerts read from the printed alert: JK449694, an African American male wearing a green hooded sweater with yellow designs, black pants and green and white gym shoes; P26-3-041, in several incidents an African American male, 17 to 25 years old, wearing dark clothing and a face covering, and in others multiple offenders described as African American males, 17 to 25 years old, wearing dark clothing and face coverings, with two vehicles, a late-model white Buick and a black Mazda sedan; P26-1-077 A, an African American male, 30 to 38 years old, 5’9” to 5’11”, last seen in a black hooded sweatshirt and a black ski mask; 26-CWP-029, three to four males in black clothing, ski masks and gloves, who fled in a separate vehicle; P26-2-017, a Black male, 6’0” to 6’2”, wearing a black sweatshirt; P26-3-039, P26-3-040 and P26-5-020, unknown.¹⁹

Each gathering below is listed with the source that announces it.

• Monday 26, 08:30 CDT, City Hall, 121 N LaSalle St: “Stand With Survivors” gathering at the Budget and Finance committee hearing (10:00 CDT), in support of police-misconduct settlement funding in the 2027 budget. Organizer, end time and size not stated. (single source)^{31, 22}
• Tuesday 27, 17:00 CDT, Armitage Avenue and Kimball Avenue (3259 W Armitage Ave): March for Affordable Rent and Affordable Home Ownership, sponsored by Palenque LSNA, addressed to state officials. Route, end point and size not stated. (single source)³³
• Tuesday 27, 17:45 CDT, Fulton River Park, 353 N Desplaines St: National Nurses United “Protect Our Patients and Our Vote” day of action, held “directly outside of Common Spirit headquarters” in the organizer’s words; no address for it is printed. End time, route and size not stated. (single source)³²
• Wednesday 28, 17:00–19:00 CDT, Federal Plaza, 230 S Dearborn St: picket line and rally against the US blockade of Cuba, sponsored by the Chicago Cuba Coalition. Size not stated. (single source)³⁴
• Wednesday 28, 17:30–20:00 CDT, site not stated: “Trick or Greed” protest directed at Amazon, sponsored by the People’s Unity Platform, linked to demands on the City’s 2027 budget. (single source)³⁵
• Thursday 29, 18:30 CDT, Benito Juarez High School, 1450 W Cermak Rd: an online call-out for public comment at the CCPSA monthly meeting, seeking an end to CPD and ICE collaboration and to CPD crowd control at immigration enforcement. Public comment is limited to 20 minutes in total. Organizer and size not stated. (single source for the call-out)^{36, 48}
• Friday 30, 07:00 CDT, 1930 Beach St, Broadview: “Nosotros + Recordamos” remembrance and ofrenda. Organizer and size not stated. (single source)³⁷
• Saturday 31, 19:00 CDT, N Halsted Street: Northalsted Halloween Parade from Halsted and Belmont, to Addison per the City full-closure permit and to Brompton per the organizer, after a street festival from 11:00 to 18:00. The organizer prints “more than 300” costumed participants; no crowd size is stated.^{7, 8}
• Friday 30 and Saturday 31, Washington Grove 01 to 06, 15 and 16: Upside Down Halloween Parade, Park District permit for non-exclusive use, status tentative. Address, hours, route and size not stated. (single source)²⁴
• Sunday 1 November, 10:00–13:00 CST, La Villita: Ride of Silence, “Ofrendas in Motion”, a memorial ride for pedestrians and cyclists killed in traffic. Start address, route, organizer and size not stated. (single source)³⁸
• Sunday 1 November, 17:00–18:00 CST, Water Tower Park, 180 E Pearson St: candlelight vigil organized by “I Heard You Malachi, 2026 formation”, marking the twentieth anniversary of a Chicago antiwar activist’s 2006 protest death. Size not stated. (single source)³⁹

Week Ahead No. 9 (19 to 25 October), scored. The week was dry, as forecast. Observed highs at O’Hare and Midway ran 3 to 6 F above the forecast every day. Fog was recorded at both airports on Wednesday 21, Thursday 22 and Friday 23, and at O’Hare on Tuesday 20; No. 9’s hourly forecast carried fog on Wednesday morning only. The highest gust was 20 mph, at Midway on Friday 23.⁵⁴ No NWS watch, warning or advisory named a Cook County zone from 19 to 25 October other than the Dense Fog Advisory of Tuesday 20.⁵⁵

Events. The Bears played the New England Patriots at Soldier Field on Thursday 22 as scheduled and won 30–24.²¹ The Blackhawks played the United Center on Friday 23 and Sunday 25 at the times printed.²⁵ PACK EXPO International ran at McCormick Place from 18 to 21 October, the dates No. 9 printed.⁵⁶

Transit and closures. The Green and Pink Line interruption at the Lake Street bridge was extended after No. 9’s publication: CTA now prints its end as 04:00 CDT Wednesday 28, not Monday 26.^{1, 30} The Blue Line single-tracking near Jefferson Park continued after Thursday 22: CTA added the night of Sunday 25 and nightly single-tracking between Cumberland and Jefferson Park from Monday 26 to Friday 30.¹ The permits for the N Morgan Street, Goethe Street, Columbia Avenue, Rockwell Street and Wood Street closures ended on their printed dates. The DuSable Lake Shore Drive bridge permit still prints Thursday 29 as its backup date.^{2, 49} The State Street overnight closure permit (from 21 October), the Doty Avenue closure, the Avenue L column-replacement permit (from 26 October; permit DOT2295030 for the Avenue L closure has run from 5 October) and the Harris Theater closures are new since No. 9.^{2, 47}

CPD alerts. Seven alerts were published after No. 9’s alert window closed on 18 October: P26-3-040 (12th, 19 October, 09:59 CDT), which No. 9 named from its feed title, and, after No. 9’s feed reading of 20 October, 11:01 CDT, six from 21 October, 13:33 CDT to 25 October, 15:53 CDT: P26-2-017 (22nd), P26-3-041 (1st), P26-5-020 (25th), 26-CWP-029 (17th, 24th and 25th), P26-1-077 A (3rd; first posted on 24 October as P26-1-077CA and reposted on 25 October with a fourth incident) and JK449694 (6th; its feed title first printed JK445923). All seven are read from the printed alert and counted. Of the two alerts No. 9 listed from their feed titles, P26-3-039 (19th) is now read from the printed alert and counted, and JK443146 (its feed title prints JK443416), which the printed alert gives as public indecency in the 20th District, stays listed under the standing practice for sexual-offense alerts. On the same counting rule the 30-day count moves from No. 9’s 30 to 32 and districts from 17 to 18, while robbery-classified alerts stay at 6 and multi-district alerts at 8: alerts No. 9 counted have passed out of the look-back, and the alerts added include two robbery alerts, P26-2-017 and P26-1-077 A, and one multi-district alert, 26-CWP-029.^{17, 18, 19}

Corrections to No. 9.

• The Dense Fog Advisory of Tuesday 20 October did not end at 09:00 CDT as printed: at 07:38 CDT it was extended to 10:00 CDT; Central Cook was cancelled at 09:14 CDT and Northern Cook remained in force to 10:00 CDT.⁵⁵

In the news

Chicago

• Federal case unsealed over powder letters to Illinois congressional offices. On Monday 26 October the Justice Department said a man allegedly mailed letters containing white powder to four members of Congress with offices in the Northern District of Illinois; one powder was salt, and no one was injured. For protective details: suspicious letters at four Chicago-area congressional offices on 16 October led to an evacuation at one.^{57, 58}
• Freight train broken into on the BNSF line; Metra trains delayed. On Tuesday 27 October at about 09:00 CDT a freight train was broken into near 24th Street and Marshfield Avenue, Metra confirmed. At 10:40 CDT Metra reported BNSF inbound and outbound trains moving, with some extensively delayed by police activity. Reported after this edition first published; a developing story.⁴³

World

• US orders non-emergency staff out of Saudi Arabia as Middle East advisories are reissued. The State Department reissued its travel advisories for 13 Middle East countries on Friday 23 October, citing Houthi attacks that include strikes on Riyadh’s airport, with levels largely unchanged. The Saudi Arabia advisory, Level 3, states that non-emergency US government employees and family members were ordered to leave on 23 October.^{59, 60}

EP and VIP

• Federal charge over an alleged plan to shoot the President at a Syracuse rally. On Monday 26 October the US Attorney’s Office in Syracuse, New York, announced a charge against a local man accused of telling a co-worker on 7 October that he wanted a gun to shoot the President at a rally there on 9 October. He appeared in court on 9 October and was released on conditions.⁶¹

One WARN notice in the region has a first separation date inside the window: MAT Holdings, Inc. (GRI Engineering), 821 Bluff Rd, Romeoville, in Will County, lists 97 workers from 31 October to 15 November. Seven notices that began earlier print separation dates or schedules that reach into the window, in Cook, DuPage, Lake and Will counties; two of their sites are in the City, Fulton Troika LLC (Fulton Market), 4501 W 42nd St, and TV Hardward Distribution, LLC, 8600 W Bryn Mawr Ave.⁶³

Counts and causes are as the employer filed them. Nothing in a WARN filing describes conduct, and nothing here suggests any named employer or workforce presents a risk.

Is Columbus Drive closed this week?

Yes, for the Skechers Hot Chocolate Run 26 on Sunday 1 November. E Monroe Drive is fully closed from 02:00 CST Sunday to 15:00 CST, and S Columbus Drive from 100 to 501 S and E Ida B Wells Drive from 100 to 248 E are fully closed from 02:00 CST Sunday on the race permit, or from 05:00 CDT Saturday on the expo permit, to 15:00 CST, and S Columbus Drive from 501 to 1200 S and E Balbo Drive from 100 to 300 E from 05:00 CDT Saturday 31 to 17:00 CST Sunday. The races start at 07:30 CST near the Art Institute, and the organizer states there is no drop-off on Michigan Avenue because of road closures. Set-up closures hold parts of Balbo Drive and Jackson Drive east of Columbus from earlier in the week.

What is the worst window for movement in Chicago this week?

Saturday 31 October from 18:00 CDT to 02:00 CST Sunday in Lakeview, when Halsted Street from Belmont to Addison is cleared for the 19:00 CDT Northalsted Halloween Parade and vehicles are barred until 02:00 CST, while the Wrigleyville Halloween Crawl holds Clark Street from 3450 to 3600 N to the west, 0.26 mile away at the nearest point between the two permits’ coordinates. Rod Wave plays the United Center at 20:00 CDT the same evening. Saturday also carries 273 block-party closures citywide and the Carrera de los Muertos closures in Pilsen in the morning. On Wednesday 28 in the evening the Bulls play the United Center from 19:00 CDT and the Fire FC match kicks off at Soldier Field at 19:30 CDT, by the club’s listing; the two venues are 3.23 miles apart and both served by the Green Line.

Which streets are closed for events?

307 special-event permits touch the week, 283 of them block parties, and 273 block-party closures fall on Saturday 31. The main event closures are N Halsted Street from 3200 to 3600 N for the Northalsted Halloween festival and parade, N Clark Street from 3450 to 3600 N for the Wrigleyville crawl, streets in Pilsen for the Carrera de los Muertos and W Farragut Avenue for Aville-o-ween, all on Saturday 31, and the Grant Park drives, including Columbus Drive, for the Skechers Hot Chocolate Run 26 on Sunday 1 November. On Monday 26 Southport Avenue closed from 12:00 to 20:00 CDT for Trick or Treat on Southport, and from Thursday 29 upper Randolph Street from Michigan Avenue to Harbor Drive closes for an award show at the Harris Theater.

Will weather delay flights at O'Hare or Midway?

Neither airport had a ground stop, ground delay program, delay or closure in the FAA status file at 09:30 CDT on Tuesday 27 October. The National Weather Service saw a low potential for a brief window of low cloud after sunrise on Tuesday, scattering by mid-morning. Thunder appears in the hourly forecast only from 01:00 to 07:00 CDT on Saturday 31, at 29 percent, and rain chances rise to 40 percent on Sunday morning; winds stay at 15 mph or less in the hourly forecast, with gusts to 20 mph on Thursday.

How many CPD alerts are open?

32 counted pattern alerts were published by the Chicago Police Department from 26 September to 25 October 2026, across 18 districts: 24 on the districts and types Week Ahead No. 9 read from each alert, and 8 read from the printed alert itself. 6 are robbery-classified and 8 name more than one district; the 1st and 6th Districts carry the most, 5 each. Following standing practice, one sexual-offense alert is listed but not counted, for 33 published. Alert counts measure how often the Department publishes a notice, not how much crime occurred.

What is the forecast?

Mild all week. Highs run from 65 on Tuesday to 72 on Wednesday and 72 on Thursday, then 66 Friday, 68 Saturday and 67 Sunday, with lows from 53 to 59. Thursday carries a chance of rain showers from 07:00 CDT, late Friday night and early Saturday a chance of showers and thunderstorms, and Sunday a chance of rain showers of up to 40 percent. The forecaster expects periodic chances for showers and perhaps isolated thunderstorms through the weekend, with dry periods between.

Each rating scores how much something constrains movement across the period. None of them scores danger, and none of them scores a place.

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