Alert archive / Illinois / River Flood Warnings in 2020
River Flood Warning 49, NWS Chicago, IL
NWS Chicago, IL issued this river flood warning at Apr 29, 2020, 9:40 PM CDT for Grundy County, Illinois. It took effect at Apr 30, 2020, 7:36 AM CDT. It was in force for 47 hr.
The area
The counties it named.
The facts
- Issued
- Apr 29, 2020, 9:40 PM CDT (02:40 UTC)
- In effect from
- Apr 30, 2020, 7:36 AM CDT
- Expired
- May 2, 2020, 6:40 AM CDT
- In force
- 47 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- Minor
County Grundy County, IL
The radar
The Chicago radar (KLOT), 45 km from the middle of the area, began a volume at 02:43 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 Illinois River at Morris (MORI2). The gauge peaked at 18.45 ft at May 1, 2020, 3:00 AM CDT.
- Action stage
- 13 ft
- Minor stage
- 16 ft
- Moderate stage
- 18 ft
- Major stage
- 22 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 05542500, 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 warning 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 warning went out at Apr 29, 9:36 PM CDT, 4 minutes earlier.
Area forecast discussion, Apr 29, 9:36 PM CDT, 4 minutes before
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</html>Hazardous weather outlook, Apr 29, 4:13 PM CDT, 5 hours 27 minutes before
Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 413 PM CDT Wed Apr 29 2020 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-302115- 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- 413 PM CDT Wed Apr 29 2020 /513 PM EDT Wed Apr 29 2020/ This Hazardous Weather Outlook is for portions of North Central Illinois...Northeast Illinois and Northwest Indiana. .DAY ONE...Tonight. Weather hazards expected... Elevated Flooding Risk. Elevated Non thunderstorm wind Risk. Significant Lakeshore Flood Risk. DISCUSSION... Persistent moderate rain will continue through late tonight. Additional amounts of one to one and a half inches are possible in an area of northeast Illinois. This may result in impacting flooding, while elsewhere localized more nuisance flooding may occur. Northerly winds will increase into tonight, with gusts of 35 to 40 mph. Higher gusts will be seen along the lake front. Waves from these strong winds will likely result in lakeshore flooding along the Cook county and northwest Indiana shorelines. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Thursday... Limited Non Thunderstorm Wind Risk. Significant Lakeshore Flood Risk. Sunday... Limited Thunderstorm Risk. DISCUSSION: Northerly winds will continue to gust 35 to possibly 40 mph over land on Thursday while 40 to 50 mph gusts may be seen along the lake front. This will continue high waves and lakeshore flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be necessary through tonight. LMZ740>745-302115- 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- 413 PM CDT Wed Apr 29 2020 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...Tonight. Weather hazards expected... Gale force winds and or very hazardous waves. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Thursday... Gale force winds and or very hazardous waves are likely. Friday... Hazardous conditions for small craft are likely. Petr Visit us at http://weather.gov/chicago Follow us on Facebook, Twitter, and Youtube at: www.facebook.com/nwschicago www.twitter.com/nwschicago www.youtube.com/nwschicago
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 8:22 PM CDT | Wind Advisory | LOT | Cook, DuPage, Lake | 19 hr |
| Apr 29, 8:28 PM CDT | Lakeshore Flood Advisory | LOT | Lake | 18 hr |
| Apr 29, 8:48 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Ford, Grundy, Iroquois, Kane and 7 more | 7 hr |
| Apr 29, 8:52 PM CDT | River Flood Warning | LOT | Cook | 30 hr |
| Apr 29, 9:14 PM CDT | River Flood Advisory | LOT | Will | 9 hr |
| Apr 29, 9:23 PM CDT | River Flood Warning | LOT | LaSalle | 52 hr |
| Apr 29, 9:33 PM CDT | River Flood Advisory | LOT | Kankakee | 9 hr |
| Apr 29, 9:33 PM CDT | River Flood Advisory | LOT | Grundy, Kankakee, Will | 9 hr |
| Apr 29, 9:52 PM CDT | River Flood Warning | LOT | LaSalle | 56 hr |
| Apr 29, 10:21 PM CDT | River Flood Warning | LOT | Winnebago | 11 hr |
| Apr 29, 10:39 PM CDT | River Flood Warning | LOT | Cook | 38 hr |
| Apr 29, 10:53 PM CDT | River Flood Advisory | LOT | Cook | 15 hr |
| Apr 29, 10:55 PM CDT | River Flood Advisory | LOT | Livingston | 36 hr |
| Apr 30, 3:48 AM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Grundy, Kane, Kankakee, Kendall and 3 more | 6 hr |
| Apr 30, 6:30 AM CDT | River Flood Warning | LOT | Will | 34 hr |
| Apr 30, 6:34 AM CDT | River Flood Warning | LOT | Kankakee | 30 hr |
| Apr 30, 6:34 AM CDT | River Flood Warning | LOT | Grundy, Kankakee, Will | 14 hr |
| Apr 30, 6:41 AM CDT | River Flood Warning | LOT | Grundy | 20 hr |
| Apr 30, 6:44 AM CDT | River Flood Warning | LOT | DuPage | 23 hr |
| Apr 30, 2:31 PM CDT | Small Craft Advisory | LOT | 13 hr | |
| Apr 29, 8:48 PM CDT | River Flood Warning | LOT | Lake | 31 hr |
Nearby
River Flood Warnings in Illinois, 2020Every river flood warning in 2020
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.