NOAA NWS / Event history

Freeze Warning issued October 17 at 2:22AM CDT until October 17 at 8:00AM CDT by NWS Chicago IL

Freeze Warning · Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane. Severe; likely; urgency: expected.

See what changed ↓Detailed event record ↗

Bulletin issued: 17 October 2026 at 07:22 UTC
First saved by us: 16 October 2026 at 19:02 UTC
Last included in a daily record: 17 October 2026
The linked daily edition preserves what we captured that UTC day; this event page is not a live warning.
Source classification: Severe · Source update

A recent feed check does not mean a new observation. This page preserves source records; it does not establish current safety or warning status.

Issuer / area: NWS Chicago IL · Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane
Certainty / urgency: Likely / Expected
Message expiry (not hazard end): 17 October 2026 at 13:00 UTC
Forecast onset / end: 17 October 2026 at 10:00 UTC / 17 October 2026 at 13:00 UTC

Archived official description

* WHAT...Low temperatures near freezing are expected. * WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry Counties. * WHEN...Until 8 AM CDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Instructions in this archived message

Take steps now to protect tender plants from the cold.

The saved record

What changed

2 updates · 1 first record

Each update compares two versions we saved. This may not include every update from the source. A missing report does not mean an event has ended.

Showing 2 changes

Saved by us

17 October 2026 at 07:32 UTC

Version 3

5 recorded details changed

Title: Before
Freeze Warning issued October 16 at 9:54PM CDT until October 17 at 8:00AM CDT by NWS Chicago IL
After
Freeze Warning issued October 17 at 2:22AM CDT until October 17 at 8:00AM CDT by NWS Chicago IL
Source updated: Before
17 October 2026 at 02:54 UTC
After
17 October 2026 at 07:22 UTC
Effective from: Before
17 October 2026 at 02:54 UTC
After
17 October 2026 at 07:22 UTC
Official description: Before
* ~~WHAT...Sub-freezing temperatures are expected. * WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry Counties. * WHEN...From 5 AM to 8 AM CDT Saturday.~~ * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected o…
After
* WHAT...Low temperatures near freezing are expected. * WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry Counties. * WHEN...Until 8 AM CDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected o…
External source link: Before
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7167846bc769d3fad840ee53e85ef1fb90bfe357.002.1
After
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b0426f592133a600188d8ad651376fc4707e0b02.001.1

Bulletin issued: 17 October 2026 at 07:22 UTC

View saved version 3

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "nws:b7b6a64c54b6f7420638ef08",
  "authorityId": "urn:oid:2.49.0.1.840.0.b0426f592133a600188d8ad651376fc4707e0b02.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.7167846bc769d3fad840ee53e85ef1fb90bfe357.002.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Freeze Warning issued October 17 at 2:22AM CDT until October 17 at 8:00AM CDT by NWS Chicago IL",
  "eventType": "Freeze Warning",
  "occurredAt": "2026-10-17T07:22:00.000Z",
  "issuedAt": "2026-10-17T07:22:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-17T07:22:00.000Z",
  "onsetAt": "2026-10-17T10:00:00.000Z",
  "expiresAt": "2026-10-17T13:00:00.000Z",
  "forecastEndAt": "2026-10-17T13:00:00.000Z",
  "severity": "Severe",
  "urgency": "Expected",
  "certainty": "Likely",
  "messageType": "Update",
  "status": "Source update",
  "place": "Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane",
  "coordinates": null,
  "issuer": "NWS Chicago IL",
  "summary": "Freeze Warning · Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane. Severe; likely; urgency: expected.",
  "description": "* WHAT...Low temperatures near freezing are expected.\n\n* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry\nCounties.\n\n* WHEN...Until 8 AM CDT this morning.\n\n* IMPACTS...Frost and freeze conditions could kill crops, other\nsensitive vegetation and possibly damage unprotected outdoor\nplumbing.",
  "instruction": "Take steps now to protect tender plants from the cold.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b0426f592133a600188d8ad651376fc4707e0b02.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

Visit the external source ↗

The external page may have changed since this version was saved.

Saved by us

17 October 2026 at 03:02 UTC

Version 2

5 recorded details changed

Title: Before
Freeze Warning issued October 16 at 1:59PM CDT until October 17 at 8:00AM CDT by NWS Chicago IL
After
Freeze Warning issued October 16 at 9:54PM CDT until October 17 at 8:00AM CDT by NWS Chicago IL
Source updated: Before
16 October 2026 at 18:59 UTC
After
17 October 2026 at 02:54 UTC
Effective from: Before
16 October 2026 at 18:59 UTC
After
17 October 2026 at 02:54 UTC
Message expiry: Before
17 October 2026 at 05:00 UTC
After
17 October 2026 at 13:00 UTC
External source link: Before
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2802ed74669b3e86f0f60f2d6ca1dc807ac783dd.001.1
After
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7167846bc769d3fad840ee53e85ef1fb90bfe357.002.1

Bulletin issued: 17 October 2026 at 02:54 UTC

View saved version 2

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "nws:b148e6872acfa06150837ee8",
  "authorityId": "urn:oid:2.49.0.1.840.0.7167846bc769d3fad840ee53e85ef1fb90bfe357.002.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.2802ed74669b3e86f0f60f2d6ca1dc807ac783dd.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Freeze Warning issued October 16 at 9:54PM CDT until October 17 at 8:00AM CDT by NWS Chicago IL",
  "eventType": "Freeze Warning",
  "occurredAt": "2026-10-17T02:54:00.000Z",
  "issuedAt": "2026-10-17T02:54:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-17T02:54:00.000Z",
  "onsetAt": "2026-10-17T10:00:00.000Z",
  "expiresAt": "2026-10-17T13:00:00.000Z",
  "forecastEndAt": "2026-10-17T13:00:00.000Z",
  "severity": "Severe",
  "urgency": "Expected",
  "certainty": "Likely",
  "messageType": "Update",
  "status": "Source update",
  "place": "Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane",
  "coordinates": null,
  "issuer": "NWS Chicago IL",
  "summary": "Freeze Warning · Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane. Severe; likely; urgency: expected.",
  "description": "* WHAT...Sub-freezing temperatures are expected.\n\n* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry\nCounties.\n\n* WHEN...From 5 AM to 8 AM CDT Saturday.\n\n* IMPACTS...Frost and freeze conditions could kill crops, other\nsensitive vegetation and possibly damage unprotected outdoor\nplumbing.",
  "instruction": "Take steps now to protect tender plants from the cold.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7167846bc769d3fad840ee53e85ef1fb90bfe357.002.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

Visit the external source ↗

The external page may have changed since this version was saved.

First saved record · 16 October 2026 at 19:02 UTC

Saved by us

16 October 2026 at 19:02 UTC

Starting point

First saved record

Our first saved version of Freeze Warning issued October 16 at 1:59PM CDT until October 17 at 8:00AM CDT by NWS Chicago IL. We have no earlier saved version to compare.

Bulletin issued: 16 October 2026 at 18:59 UTC

View saved version 1

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "nws:193ccc50ba52e27d3a51809f",
  "authorityId": "urn:oid:2.49.0.1.840.0.2802ed74669b3e86f0f60f2d6ca1dc807ac783dd.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [
    {
      "identifier": "urn:oid:2.49.0.1.840.0.1ea1b58e372b4fc4a3be6011cc68b4e866a5e2d6.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    },
    {
      "identifier": "urn:oid:2.49.0.1.840.0.55fbd1ad965fa78614fd99380226b0dd10df96f6.001.1",
      "sender": "w-nws.webmaster@noaa.gov"
    }
  ],
  "category": "weather",
  "title": "Freeze Warning issued October 16 at 1:59PM CDT until October 17 at 8:00AM CDT by NWS Chicago IL",
  "eventType": "Freeze Warning",
  "occurredAt": "2026-10-16T18:59:00.000Z",
  "issuedAt": "2026-10-16T18:59:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-16T18:59:00.000Z",
  "onsetAt": "2026-10-17T10:00:00.000Z",
  "expiresAt": "2026-10-17T05:00:00.000Z",
  "forecastEndAt": "2026-10-17T13:00:00.000Z",
  "severity": "Severe",
  "urgency": "Expected",
  "certainty": "Likely",
  "messageType": "Update",
  "status": "Source update",
  "place": "Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane",
  "coordinates": null,
  "issuer": "NWS Chicago IL",
  "summary": "Freeze Warning · Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane. Severe; likely; urgency: expected.",
  "description": "* WHAT...Sub-freezing temperatures are expected.\n\n* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry\nCounties.\n\n* WHEN...From 5 AM to 8 AM CDT Saturday.\n\n* IMPACTS...Frost and freeze conditions could kill crops, other\nsensitive vegetation and possibly damage unprotected outdoor\nplumbing.",
  "instruction": "Take steps now to protect tender plants from the cold.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2802ed74669b3e86f0f60f2d6ca1dc807ac783dd.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

Visit the external source ↗

The external page may have changed since this version was saved.