Alert archive / Illinois / Flash Flood Warnings in 2015
Flash Flood Warning 10, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Jun 13, 2015, 8:59 PM CDT for Boone County, McHenry County, Winnebago County, Illinois. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 13, 2015, 8:59 PM CDT (01:59 UTC)
- Expired
- Jun 14, 2015, 3:28 AM CDT
- In force
- 6 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Boone County, IL, McHenry County, IL, Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 74 km from the middle of the area, began a volume at 01:59 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 nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 2.0 hours before the alert went out and 243 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 253 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1117 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
What forecasters said that day
The local office's own words before this flash 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 flash flood warning went out at Jun 13, 6:52 PM CDT, 2 hours 7 minutes earlier.
Area forecast discussion, Jun 13, 6:52 PM CDT, 2 hours 7 minutes before
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</html>Hazardous weather outlook, Jun 13, 3:09 PM CDT, 5 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 309 PM CDT SAT JUN 13 2015 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 142015- WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON- IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON- 309 PM CDT SAT JUN 13 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. WEATHER HAZARDS EXPECTED: THUNDERSTORMS...THE STRONGEST OF WHICH MAY PRODUCE: FREQUENT CLOUD TO GROUND LIGHTNING. ISOLATED FLOODING. WIND GUSTS OVER 60 MPH. HAIL TO THE SIZE OF QUARTERS. AREAS AFFECTED AND TIMING: THUNDERSTORMS WILL INCREASE ACROSS THE ENTIRE AREA LATE TODAY AND TONIGHT. NORTH-CENTRAL ILLINOIS IS THE MOST FAVORED AREA FOR SEVERE WEATHER THROUGH LATE AFTERNOON...THOUGH SCATTERED DEVELOPMENT IS EXPECTED AREA WIDE. BETTER CHANCES FOR STORMS WILL ARRIVE THIS EVENING AND TONIGHT. DISCUSSION: SEVERAL SHORTWAVE TROUGHS WILL CROSS THE REGION THROUGH TONIGHT AND GENERATE SHOWERS AND THUNDERSTORMS. EXPECT SCATTERED ACTIVITY THIS AFTERNOON...WITH BETTER CHANCES FOR THUNDERSTORMS THIS EVENING AND TONIGHT. THE STRONGEST THUNDERSTORMS WILL ALSO PRODUCE HEAVY DOWNPOURS WHICH MAY CAUSE ISOLATED FLOODING... ESPECIALLY TONIGHT WHEN STORM COVERAGE IS EXPECTED TO BE GREATEST. PORTIONS OF THE IROQUOIS...KANKAKEE...AND ILLINOIS RIVERS WILL REMAIN IN FLOOD. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE WILL BE PERIODIC CHANCES OF THUNDERSTORMS SUNDAY THROUGH THURSDAY. STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE SUNDAY AND MONDAY... WITH HEAVY RAINFALL ALSO POSSIBLE. PORTIONS OF THE IROQUOIS...KANKAKEE...AND ILLINOIS RIVERS WILL REMAIN IN FLOOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE LATE THIS AFTERNOON AND TONIGHT. && LMZ740>745-142015- WINTHROP HARBOR TO WILMETTE HARBOR- WILMETTE HARBOR TO NORTHERLY ISLAND- NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY- GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY- 309 PM CDT SAT JUN 13 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS SUNDAY THROUGH FRIDAY. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-142015- LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH FOX ISLAND 5 NM OFFSHORE- LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI- LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO MID LAKE- 309 PM CDT SAT JUN 13 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. PERIODIC CHANCES FOR THUNDERSTORMS ARE EXPECTED SUNDAY THROUGH FRIDAY. && KMD VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE) FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT: WWW.FACEBOOK.COM/NWSCHICAGO WWW.TWITTER.COM/NWSCHICAGO WWW.YOUTUBE.COM/NWSCHICAGO
In the hours before
Local storm report, Jun 13, 7:23 PM CDT, 1 hour 36 minutes before
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</html>Local storm report, Jun 13, 7:24 PM CDT, 1 hour 35 minutes before
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</html>Local storm report, Jun 13, 7:50 PM CDT, 1 hour 9 minutes before
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</html>Local storm report, Jun 13, 7:56 PM CDT, 1 hour 3 minutes before
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</html>Local storm report, Jun 13, 8:40 PM CDT, 19 minutes before
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</html>Local storm report, Jun 13, 8:58 PM CDT, 1 minute 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 |
|---|---|---|---|---|
| Jun 13, 7:33 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage | 3 hr |
| Jun 13, 8:20 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry | 26 min |
| Jun 13, 9:38 PM CDT | River Flood Warning | LOT | LaSalle | 18 days |
| Jun 13, 10:08 PM CDT | Areal Flood Advisory | LOT | DeKalb, LaSalle, Lee | 3 hr |
| Jun 13, 11:42 PM CDT | Areal Flood Warning | LOT | Grundy, Kendall, LaSalle | 12 hr |
| Jun 14, 2:51 AM CDT | Marine Dense Fog Advisory | LOT | 36 hr | |
| Jun 14, 5:50 AM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Will | 3 hr |
| Jun 14, 8:17 AM CDT | River Flood Advisory | LOT | Will | 37 hr |
| Jun 14, 8:17 AM CDT | River Flood Advisory | LOT | LaSalle | 40 hr |
| Jun 14, 8:56 AM CDT | River Flood Warning | LOT | Cook | 18 hr |
| Jun 14, 10:52 AM CDT | River Flood Warning | LOT | Grundy | 6 days |
| Jun 14, 11:27 AM CDT | Areal Flood Warning | LOT | Grundy, Kendall | 27 hr |
| Jun 14, 6:54 PM CDT | Areal Flood Advisory | LOT | Grundy, LaSalle | 4 hr |
Nearby
Flash Flood Warnings in Illinois, 2015Every flash flood warning in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.