Alert archive / Illinois / River Flood Advisories in 2021

River Flood Advisory 38, NWS Chicago, IL

October 26, 2021Livingston County, Illinois

NWS Chicago, IL issued this river flood advisory at Oct 26, 2021, 9:44 AM CDT for Livingston County, Illinois. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: Oct 26, 2021, 9:44 AM CDT (14:44 UTC)
Expired: Oct 27, 2021, 5:40 AM CDT
In force: 20 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon

County Livingston County, IL

The radar

The Chicago radar (KLOT), 89 km from the middle of the area, began a volume at 14:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Vermilion River at Pontiac (PNTI2). The gauge peaked at 13.57 ft at Oct 26, 2021, 1:00 PM CDT.

Action stage: 13 ft
Minor stage: 14 ft
Moderate stage: 15 ft
Major stage: 18 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05554500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this river flood advisory went out at Oct 26, 6:08 AM CDT, 3 hours 36 minutes earlier.

Area forecast discussion, Oct 26, 6:08 AM CDT, 3 hours 36 minutes before

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Hazardous weather outlook, Oct 26, 4:23 AM CDT, 5 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
423 AM CDT Tue Oct 26 2021

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-270930-
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-
423 AM CDT Tue Oct 26 2021 /523 AM EDT Tue Oct 26 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Limited Frost Risk.

DISCUSSION...

Low temperatures in the middle 30's across the far west suburbs
could mean some patchy early morning frost this morning,
particularly for those in rural Lee, Ogle, and Winnebago
Counties. Additional frost development is possible for interior
portions of northwest Illinois and Indiana tonight into early
tomorrow morning.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

  No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

LMZ740>745-270930-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
423 AM CDT Tue Oct 26 2021

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Hazardous conditions for small craft.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Thursday through Saturday...
  Hazardous conditions for small craft are likely.

Doom

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The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 25, 7:53 PM CDT	River Flood Advisory	LOT	Kankakee	19 hr
Oct 25, 7:53 PM CDT	River Flood Advisory	LOT	Jasper	53 hr
Oct 26, 2:00 PM CDT	Frost Advisory	LOT	Benton, Jasper, Lake, Newton, Porter	19 hr

Nearby

River Flood Advisories in Illinois, 2021 Every river flood advisory in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.