Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
325 AM CDT Sun Apr 19 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-200830-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
325 AM CDT Sun Apr 19 2026 /425 AM EDT Sun Apr 19 2026/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Significant Frost and Freeze Risk.

DISCUSSION...

Sub-freezing temperatures are forecast late tonight into early
Monday morning outside of central Cook County. Take necessary
precautions to protect sensitive plants and vegetation.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

  No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

$$

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
152 AM CDT Sun Apr 19 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002-
010-011-019-191700-
/O.UPG.KLOT.FZ.A.0001.260420T0500Z-260420T1400Z/
/O.NEW.KLOT.FZ.W.0001.260420T0500Z-260420T1400Z/
/O.CON.KLOT.FR.Y.0001.000000T0000Z-260419T1400Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern
Will-Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-
Benton-
Including the cities of Valparaiso, Carol Stream, Beecher,
Hammond, Crystal Lake, Oregon, Fairbury, Naperville, Crete,
Wheaton, McHenry, Waukegan, Kankakee, Gary, Oxford, Minooka,
Bolingbrook, Paxton, Plainfield, Yorkville, Mendota,
Merrillville, La Salle, Plano, Gibson City, Roselawn, Dixon,
Watseka, Coal City, Morocco, Bradley, Oswego, Gurnee, Woodstock,
Gilman, Mokena, Ottawa, Lombard, Rochelle, Elgin, Manhattan,
Byron, Dwight, Portage, DeKalb, DeMotte, Peotone, Algonquin,
Mundelein, Kentland, Belvidere, Rockford, Marseilles, Streator,
Bourbonnais, Morris, Aurora, Channahon, Chesterton, Downers
Grove, Fowler, Wilmington, Sycamore, Rensselaer, Joliet, Pontiac,
and Buffalo Grove
152 AM CDT Sun Apr 19 2026 /252 AM EDT Sun Apr 19 2026/

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT /10 AM EDT/ THIS
MORNING...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT CDT /1 AM EDT/ TONIGHT TO
9 AM CDT /10 AM EDT/ MONDAY...

* WHAT...For the Frost Advisory, temperatures as low as 32 will
  result in frost formation. For the Freeze Warning, sub-freezing
  temperatures as low as 27 expected, with the coldest conditions
  across interior northern Illinois.

* WHERE...Portions of central, east central, north central, and
  northeast Illinois and northwest Indiana.

* WHEN...For the Frost Advisory, until 9 AM CDT /10 AM EDT/ this
  morning. For the Freeze Warning, from midnight CDT /1 AM EDT/
  tonight to 9 AM CDT /10 AM EDT/ Monday.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
152 AM CDT Sun Apr 19 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002-
010-011-019-191700-
/O.UPG.KLOT.FZ.A.0001.260420T0500Z-260420T1400Z/
/O.NEW.KLOT.FZ.W.0001.260420T0500Z-260420T1400Z/
/O.CON.KLOT.FR.Y.0001.000000T0000Z-260419T1400Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern
Will-Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-
Benton-
Including the cities of Valparaiso, Carol Stream, Beecher,
Hammond, Crystal Lake, Oregon, Fairbury, Naperville, Crete,
Wheaton, McHenry, Waukegan, Kankakee, Gary, Oxford, Minooka,
Bolingbrook, Paxton, Plainfield, Yorkville, Mendota,
Merrillville, La Salle, Plano, Gibson City, Roselawn, Dixon,
Watseka, Coal City, Morocco, Bradley, Oswego, Gurnee, Woodstock,
Gilman, Mokena, Ottawa, Lombard, Rochelle, Elgin, Manhattan,
Byron, Dwight, Portage, DeKalb, DeMotte, Peotone, Algonquin,
Mundelein, Kentland, Belvidere, Rockford, Marseilles, Streator,
Bourbonnais, Morris, Aurora, Channahon, Chesterton, Downers
Grove, Fowler, Wilmington, Sycamore, Rensselaer, Joliet, Pontiac,
and Buffalo Grove
152 AM CDT Sun Apr 19 2026 /252 AM EDT Sun Apr 19 2026/

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT /10 AM EDT/ THIS
MORNING...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT CDT /1 AM EDT/ TONIGHT TO
9 AM CDT /10 AM EDT/ MONDAY...

* WHAT...For the Frost Advisory, temperatures as low as 32 will
  result in frost formation. For the Freeze Warning, sub-freezing
  temperatures as low as 27 expected, with the coldest conditions
  across interior northern Illinois.

* WHERE...Portions of central, east central, north central, and
  northeast Illinois and northwest Indiana.

* WHEN...For the Frost Advisory, until 9 AM CDT /10 AM EDT/ this
  morning. For the Freeze Warning, from midnight CDT /1 AM EDT/
  tonight to 9 AM CDT /10 AM EDT/ Monday.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Hazard Report Provided By forecast.weather.gov