Effective: 4/19/2026 1:28 AM for Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Mason; Logan; De Witt; Piatt; Champaign; Vermilion
Published: 4/19/2026 1:28 AM Updated: 4/19/2026 1:28 AM Expires 4/19/2026 8:00 AM
Alert Status
Actual
Likely
Expected
Minor
Prepare
Actionable
Certainty
Urgency
Severity
Response Type
* WHAT...For the Frost Advisory, temperatures as low as 34 will result in frost formation. For the Freeze Warning, sub-freezing temperatures as low as 30 to 32 expected.
* WHERE...Portions of central, east central, and west central Illinois.
* WHEN...For the Frost Advisory, until 8 AM CDT this morning. For the Freeze Warning, from 1 AM to 8 AM CDT Monday.
* IMPACTS...Frost and freeze conditions could damage or kill sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Instructions:
Take steps now to protect tender plants from the cold.
Effective: 4/18/2026 1:48 PM for Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Mason; Logan; De Witt; Piatt; Champaign; Vermilion
* WHAT...For the Frost Advisory, temperatures as low as 34 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 30 possible.
* WHERE...Portions of central, east central, and west central Illinois.
* WHEN...For the Frost Advisory, from 1 AM to 8 AM CDT Sunday. For the Freeze Watch, from late Sunday night through Monday morning.
* IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Instructions:
Take steps now to protect tender plants from the cold.
Effective: 4/19/2026 1:28 AM for Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Mason; Logan; De Witt; Piatt; Champaign; Vermilion
Published: 4/19/2026 1:28 AM Updated: 4/19/2026 1:28 AM Expires 4/19/2026 8:00 AM
Alert Status
Actual
Likely
Expected
Moderate
Execute
Actionable
Certainty
Urgency
Severity
Response Type
* WHAT...For the Frost Advisory, temperatures as low as 34 will result in frost formation. For the Freeze Warning, sub-freezing temperatures as low as 30 to 32 expected.
* WHERE...Portions of central, east central, and west central Illinois.
* WHEN...For the Frost Advisory, until 8 AM CDT this morning. For the Freeze Warning, from 1 AM to 8 AM CDT Monday.
* IMPACTS...Frost and freeze conditions could damage or kill sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Instructions:
Take steps now to protect tender plants from the cold.