Alert archive / Illinois / River Flood Warnings in 2020
River Flood Warning 92, NWS Chicago, IL
NWS Chicago, IL issued this river flood warning at May 24, 2020, 12:42 AM CDT for Kane County, Kendall County, Illinois. It took effect at May 24, 2020, 6:33 AM CDT. It was in force for 66 hr.
The area
The counties it named.
The facts
- Issued
- May 24, 2020, 12:42 AM CDT (05:42 UTC)
- In effect from
- May 24, 2020, 6:33 AM CDT
- Expired
- May 27, 2020, 1:00 AM CDT
- In force
- 66 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- Minor
Counties Kane County, IL, Kendall County, IL
The radar
The Chicago radar (KLOT), 34 km from the middle of the area, began a volume at 05:43 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 Fox River at Montgomery (MNGI2). The gauge peaked at 13.68 ft at May 24, 2020, 9:00 AM CDT.
- Action stage
- 13 ft
- Minor stage
- 13.5 ft
- Moderate stage
- 15 ft
- Major stage
- 16 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 05551540, 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 May 23, 6:37 PM CDT, 6 hours 5 minutes earlier.
Area forecast discussion, May 23, 6:37 PM CDT, 6 hours 5 minutes before
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</html>Hazardous weather outlook, May 23, 5:09 PM CDT, 7 hours 33 minutes before
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
509 PM CDT Sat May 23 2020
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-242215-
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-
509 PM CDT Sat May 23 2020 /609 PM EDT Sat May 23 2020/
This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Significant Thunderstorm Risk...with an associated:
Elevated Tornado risk.
Elevated hail risk...up to golf ball size.
Elevated damaging wind risk...up to 70 mph.
Limited Flooding Risk.
DISCUSSION...
Scattered strong to severe thunderstorms will continue across
the area through early this evening. These are likely to move out
of northern Illinois by 8 to 9 p.m. and northwest Indiana by
10 p.m., though scattered storms may linger in eastern Illinois
and northwest Indiana into early overnight.
The primary severe threat are tornadoes, large hail, and damaging
winds. Given the wet conditions of late and elevated river levels,
very heavy downpours from thunderstorms will be capable of
producing isolated to instances of flash flooding, along with
renewed river and stream rises. After the primary severe and
flooding threat ends, the potential exists for thunderstorms to
focus east of I-57 into the early overnight, which could prolong
the flooding risk for those areas, especially in northwest
Indiana.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday and Monday...
Limited Thunderstorm Risk.
Tuesday and Wednesday...
Significant Thunderstorm Risk.
Thursday...
Elevated Thunderstorm Risk.
Friday...
Limited Thunderstorm Risk.
DISCUSSION:
There will be daily scattered thunderstorm chances amidst very
warm and humid conditions Sunday through Tuesday, with possibly
higher coverage of thunderstorms by mid week. Any thunderstorms
will be capable of producing heavy downpours and possibly an
isolated flooding risk. Thunderstorm chances may be limited to
areas south of I-80 or south of there by Thursday and especially
Friday.
.SPOTTER INFORMATION STATEMENT...
Spotters will continue to be needed through early evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east northeast at 30 to 35 mph.
LMZ740>745-242215-
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-
509 PM CDT Sat May 23 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...
Significant Thunderstorm Risk...with an associated:
Limited Waterspout Risk.
Elevated hail risk...up to ping pong ball size.
Limited thunderstorm wind gust risk...up to 40 kt.
Elevated Fog Risk.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday...
Limited Thunderstorm Risk.
Elevated Fog Risk.
Monday...
Limited Thunderstorm Risk.
Tuesday...
Elevated Thunderstorm Risk.
Wednesday...
Significant Thunderstorm Risk.
Thursday and Friday...
Limited Thunderstorm Risk.
MTF
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Local storm report, May 23, 6:44 PM CDT, 5 hours 58 minutes before
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</html>Local storm report, May 23, 6:47 PM CDT, 5 hours 55 minutes before
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</html>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 7:02 PM CDT | Special Marine Warning | LOT | 118 min | |
| May 23, 7:37 PM CDT | Areal Flood Advisory | LOT | Cook, Lake | 3 hr |
| May 23, 9:20 PM CDT | River Flood Advisory | LOT | Boone | 64 hr |
| May 23, 9:20 PM CDT | River Flood Advisory | LOT | Winnebago | 3 days |
| May 23, 9:20 PM CDT | River Flood Advisory | LOT | Ogle | 4 days |
| May 23, 11:57 PM CDT | River Flood Advisory | LOT | Cook | 7 hr |
| May 24, 12:38 AM CDT | River Flood Advisory | LOT | Cook | 16 hr |
| May 24, 12:43 AM CDT | River Flood Advisory | LOT | LaSalle | 3 days |
| May 24, 8:43 AM CDT | River Flood Warning | LOT | LaSalle | 25 hr |
| May 24, 8:57 AM CDT | River Flood Advisory | LOT | Grundy | 25 hr |
| May 24, 9:01 AM CDT | River Flood Advisory | LOT | Winnebago | 21 hr |
| May 24, 9:17 AM CDT | River Flood Advisory | LOT | Winnebago | 16 hr |
| May 24, 3:52 PM CDT | River Flood Advisory | LOT | Kankakee | 13 hr |
| May 23, 7:33 PM CDT | Severe Thunderstorm Warning | LOT | Lake, Porter | 72 min |
| May 23, 7:42 PM CDT | River Flood Warning | LOT | Lake | 10 hr |
| May 23, 7:54 PM CDT | Areal Flood Advisory | LOT | Lake, Porter | 3 hr |
| May 23, 8:06 PM CDT | Flash Flood Warning | LOT | Porter | 4 hr |
| May 24, 8:41 AM CDT | River Flood Warning | LOT | Lake, Newton | 4 days |
| May 24, 3:52 PM CDT | River Flood Advisory | LOT | Jasper, Porter | 17 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.