Alert archive / Illinois / River Flood Warnings in 2020

River Flood Warning 65, NWS Chicago, IL

May 15, 2020DuPage County, Illinois

NWS Chicago, IL issued this river flood warning at May 15, 2020, 1:49 AM CDT for DuPage County, Illinois. It took effect at May 15, 2020, 7:00 AM CDT. It was in force for 4 days.

The area

The counties it named.

The facts

Issued: May 15, 2020, 1:49 AM CDT (06:49 UTC)
In effect from: May 15, 2020, 7:00 AM CDT
Expired: May 19, 2020, 1:00 PM CDT
In force: 4 days
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: Minor

County DuPage County, IL

The river

Written for the forecast point West Branch Du Page River near Warrenville (WRNI2). The gauge peaked at 13.90 ft at May 16, 2020, 12:00 AM CDT.

Action stage: 11 ft
Minor stage: 12.5 ft
Moderate stage: 14.5 ft
Major stage: 17.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05540095, 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 15, 12:51 AM CDT, 58 minutes earlier.

Area forecast discussion, May 15, 12:51 AM CDT, 58 minutes before

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Hazardous weather outlook, May 14, 3:26 PM CDT, 10 hours 23 minutes before

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
326 PM CDT Thu May 14 2020

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-152030-
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-
326 PM CDT Thu May 14 2020 /426 PM EDT Thu May 14 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 hail risk...up to ping pong ball sized.
     Elevated damaging wind risk...up to 65 mph.
     Limited Tornado Risk
  Significant Flooding Risk.

DISCUSSION...

Thunderstorms are expected to redevelop later this afternoon and
evening, and some of these could be severe, capable of producing
some instances of damaging winds and large hail. The most likely
time of any potential severe thunderstorms is roughly between 6 pm
and 11 pm. The main severe threat appears to be near and south of
I-80.

In addition to the risk for severe weather, there is a threat for
several rounds of thunderstorms to produce locally very heavy
rainfall this evening and overnight with rainfall totals in
excess of three inches possible. A Flash Flood Watch is in effect
for locales near and south of I-88 and north of a Chatsworth to
DeMotte, Indiana line.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Saturday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.
Sunday...
  Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed tonight mainly south of I-80.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east northeast at 35 to 40 mph.

LMZ740>745-152030-
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-
326 PM CDT Thu May 14 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...

  Elevated Thunderstorm Risk...with an associated:
     Elevated hail risk...up to ping pong ball size.
     Elevated thunderstorm wind gust risk...up to 60 kts.
  Elevated Fog Risk.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
  Limited Thunderstorm Risk.
Saturday and Sunday...
  Hazardous conditions for small craft are likely.
  Limited Thunderstorm Risk.
Monday...
  Hazardous conditions for small craft are likely.

Carlaw

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In the hours before

Local storm report, May 15, 1:10 AM CDT, 39 minutes before

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Local storm report, May 15, 1:23 AM CDT, 26 minutes before

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Local storm report, May 15, 1:25 AM CDT, 24 minutes before

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Local storm report, May 15, 1:27 AM CDT, 22 minutes before

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Local storm report, May 15, 1:35 AM CDT, 14 minutes before

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Special weather statement, May 15, 1:37 AM CDT, 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 8:08 PM CDT	Special Weather Statement	LOT	Livingston	22 min
May 14, 8:32 PM CDT	Areal Flood Advisory	LOT	Ford, Grundy, Iroquois, Kankakee, LaSalle, Livingston	4 hr
May 14, 8:47 PM CDT	River Flood Warning	LOT	Bureau, LaSalle, Putnam	22 days
May 14, 8:53 PM CDT	River Flood Advisory	LOT	Boone	64 hr
May 14, 9:09 PM CDT	Special Weather Statement	LOT	Livingston	36 min
May 14, 9:14 PM CDT	Flash Flood Warning	LOT	Grundy, Kankakee, LaSalle, Livingston	6 hr
May 14, 9:21 PM CDT	Special Weather Statement	LOT	Kankakee	24 min
May 14, 9:53 PM CDT	Special Weather Statement	LOT	Kankakee	37 min
May 14, 10:11 PM CDT	Flash Flood Warning	LOT	Kankakee	5 hr
May 14, 10:17 PM CDT	Severe Thunderstorm Warning	LOT	Kankakee	43 min
May 14, 10:26 PM CDT	Severe Thunderstorm Warning	LOT	Lee	49 min
May 14, 10:47 PM CDT	Areal Flood Advisory	LOT	Boone, Cook, DeKalb, DuPage, Kane, Kendall and 7 more	4 hr
May 14, 10:57 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, LaSalle, Lee	48 min
May 14, 10:58 PM CDT	Areal Flood Advisory	LOT	Iroquois	5 hr
May 14, 11:09 PM CDT	Flash Flood Warning	LOT	Cook	5 hr
May 14, 11:26 PM CDT	Tornado Warning	LOT	Lee	19 min
May 14, 11:40 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Kane, Kendall, LaSalle	50 min
May 14, 11:53 PM CDT	Tornado Warning	LOT	DeKalb, Kane, Kendall	22 min
May 15, 12:04 AM CDT	Areal Flood Advisory	LOT	Lake	3 hr
May 15, 12:11 AM CDT	Flash Flood Warning	LOT	Cook, DeKalb, DuPage, Kane, Kendall, Lake and 2 more	4 hr
May 15, 12:19 AM CDT	Severe Thunderstorm Warning	LOT	DuPage, Kane, Kendall, Will	41 min
May 15, 12:45 AM CDT	Flash Flood Warning	LOT	Lake	4 hr
May 15, 12:57 AM CDT	Special Weather Statement	LOT	Cook	48 min
May 15, 1:20 AM CDT	Areal Flood Warning	LOT	DeKalb, Kendall, LaSalle, Lee, Ogle	9 hr
May 15, 1:28 AM CDT	River Flood Warning	LOT	Kankakee	7 days
May 15, 1:35 AM CDT	Areal Flood Advisory	LOT	Grundy, Kankakee, Kendall, LaSalle, Will	115 min
May 15, 1:50 AM CDT	River Flood Advisory	LOT	DeKalb	36 hr
May 15, 1:55 AM CDT	River Flood Advisory	LOT	Lake	36 hr
May 15, 1:55 AM CDT	River Flood Advisory	LOT	Lake	36 hr
May 15, 1:59 AM CDT	River Flood Warning	LOT	Will	6 days
May 15, 2:02 AM CDT	River Flood Advisory	LOT	Grundy, Kankakee, Will	36 hr
May 15, 2:02 AM CDT	River Flood Advisory	LOT	Grundy	15 hr
May 15, 2:06 AM CDT	River Flood Advisory	LOT	Winnebago	36 hr
May 15, 3:01 AM CDT	Areal Flood Warning	LOT	Grundy, Kankakee, Livingston	6 hr
May 15, 4:05 AM CDT	Areal Flood Warning	LOT	Cook, DeKalb, DuPage, Kane	6 hr
May 15, 4:14 AM CDT	Areal Flood Warning	LOT	Lake, McHenry	6 hr
May 15, 4:39 AM CDT	River Flood Advisory	LOT	Lee	8 days
May 15, 4:43 AM CDT	River Flood Warning	LOT	Lake	11 days
May 15, 4:43 AM CDT	River Flood Warning	LOT	Lake	11 days
May 15, 4:43 AM CDT	River Flood Warning	LOT	Cook	11 days
May 15, 4:43 AM CDT	River Flood Warning	LOT	Cook	64 hr
May 15, 4:48 AM CDT	River Flood Advisory	LOT	Lake	39 hr
May 15, 4:48 AM CDT	River Flood Advisory	LOT	Cook	49 hr
May 15, 10:14 AM CDT	River Flood Warning	LOT	Winnebago	6 days
May 15, 10:14 AM CDT	River Flood Warning	LOT	DeKalb	18 hr
May 15, 10:41 AM CDT	Areal Flood Advisory	LOT	Cook, DeKalb, DuPage, Kane, Kendall, Lake and 4 more	6 hr
May 15, 11:07 AM CDT	River Flood Advisory	LOT	Cook	20 hr
May 15, 11:58 AM CDT	River Flood Warning	LOT	Grundy	7 days
May 15, 11:58 AM CDT	River Flood Warning	LOT	LaSalle	9 days
May 15, 4:45 PM CDT	River Flood Warning	LOT	Grundy, Kankakee, Will	20 hr
May 15, 5:00 PM CDT	River Flood Warning	LOT	Grundy	4 days
May 14, 10:43 PM CDT	Special Weather Statement	LOT	Jasper	47 min
May 15, 1:29 AM CDT	River Flood Warning	LOT	Lake	10 hr
May 15, 1:37 AM CDT	Special Weather Statement	LOT	Jasper, Newton, Porter	38 min
May 15, 4:45 PM CDT	River Flood Warning	LOT	Lake, Newton	9 days

Nearby

River Flood Warnings in Illinois, 2020 Every 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; the gauge from the NWS water service and the USGS.