Alert archive / Indiana / Flash Flood Warnings in 2015
Flash Flood Warning 19, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Jun 20, 2015, 10:59 PM CDT for Iroquois County, Kankakee County, Will County, Illinois; 4 counties in Indiana. 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 20, 2015, 10:59 PM CDT (03:59 UTC)
- Expired
- Jun 21, 2015, 5:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Iroquois County, IL, Kankakee County, IL, Will County, IL, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 66 km from the middle of the area, began a volume at 04:00 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, 4.0 hours before the alert went out and 147 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
- 143 J/kg
- Mixed-layer CIN
- -493 J/kg
- Mixed-layer LCL
- 1524 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 194 m²/s²
- 0-3 km storm-relative helicity
- 269 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 20, 10:32 PM CDT, 27 minutes earlier.
Area forecast discussion, Jun 20, 10:32 PM CDT, 27 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 442 PM CDT SAT JUN 20 2015 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 212145- 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- 442 PM CDT SAT JUN 20 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. WEATHER HAZARDS EXPECTED: SCATTERED THUNDERSTORMS...SOME OF WHICH MAY PRODUCE: TORRENTIAL RAINFALL. FREQUENT CLOUD TO GROUND LIGHTNING. WIND GUSTS OVER 60 MPH. QUARTER SIZED HAIL. AREAS AFFECTED AND TIMING: SHOWERS AND THUNDERSTORMS ARE LIKELY OVER NORTH CENTRAL ILLINOIS LATE THIS AFTERNOON...AND THEN LIKELY ACROSS THE ENTIRE OUTLOOK AREA FROM EARLY TO MID EVENING. THE HIGHEST THREAT FOR STRONG TO SEVERE STORMS AND THUNDERSTORMS PRODUCING FREQUENT CLOUD TO GROUND LIGHTNING WILL PASS WEST OF A BYRON TO OTTAWA TO PAXTON LINE. DISCUSSION: A COLD FRONT WILL SINK SOUTHEAST THROUGH THE REGION THIS EVENING...WITH AN AREA OF THUNDERSTORMS FORMING AHEAD OF THE FRONT. A MOIST AIRMASS WILL ALSO BE IN PLACE SO TORRENTIAL DOWNPOURS ARE LIKELY WITH WELL ORGANIZED THUNDERSTORMS. GIVEN THE RECENT HEAVY RAINFALL...FLASH FLOODING IS POSSIBLE ALONG WITH RISES ON LOCAL RIVERS AND STREAMS. THE MAIN SEVERE WEATHER THREATS WILL BE LARGE HAIL AND ISOLATED DAMAGING WIND GUSTS. MODERATE TO MAJOR FLOODING CONTINUES ON PORTIONS OF THE KANKAKEE AND IROQUOIS RIVERS IN NORTHWEST INDIANA...AND MODERATE FLOODING CONTINUES ON THE ILLINOIS RIVER NEAR LA SALLE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE ARE PERIODIC THUNDERSTORM CHANCES ACROSS THE ENTIRE OUTLOOK AREA SUNDAY THROUGH FRIDAY. SOME OF THE STORMS ON MONDAY COULD BE STRONG TO SEVERE AND PRODUCE HEAVY RAINFALL. PORTIONS OF THE ILLINOIS...IROQUOIS AND KANKAKEE RIVERS WILL REMAIN IN FLOOD. .SPOTTER INFORMATION STATEMENT... SPOTTERS MAY BE NEEDED IN PORTIONS OF THE OUTLOOK AREA THIS EVENING. && LMZ740>745-212145- 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- 442 PM CDT SAT JUN 20 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. THERE IS A CHANCE OF THUNDERSTORMS THIS EVENING AND OVERNIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE ARE PERIODIC CHANCES OF THUNDERSTORMS MONDAY THROUGH FRIDAY. WINDS HAZARDOUS TO SMALL CRAFT ARE POSSIBLE MONDAY AFTERNOON THROUGH MONDAY EVENING. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-212145- 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- 442 PM CDT SAT JUN 20 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS THIS EVENING AND OVERNIGHT ACROSS THE ENTIRE LAKE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE ARE PERIODIC CHANCES OF THUNDERSTORMS MONDAY THROUGH FRIDAY. && RODRIGUEZ 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 20, 9:11 PM CDT, 1 hour 48 minutes before
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Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 7:17 PM CDT | Special Weather Statement | LOT | Kendall | 28 min |
| Jun 20, 7:38 PM CDT | Special Weather Statement | LOT | Will | 52 min |
| Jun 20, 8:37 PM CDT | River Flood Advisory | LOT | Kane, Kendall | 47 hr |
| Jun 20, 9:00 PM CDT | Special Weather Statement | LOT | Will | 30 min |
| Jun 20, 9:23 PM CDT | Special Weather Statement | LOT | Will | 37 min |
| Jun 20, 9:24 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Will | 3 hr |
| Jun 20, 9:26 PM CDT | Special Marine Warning | LOT | 94 min | |
| Jun 20, 9:47 PM CDT | Special Weather Statement | LOT | Grundy, LaSalle, Livingston | 43 min |
| Jun 20, 9:57 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 33 min |
| Jun 20, 10:15 PM CDT | Flash Flood Warning | LOT | Ford, Grundy, Iroquois, Kankakee, LaSalle, Livingston and 1 more | 6 hr |
| Jun 20, 10:28 PM CDT | Special Weather Statement | LOT | Ford | 47 min |
| Jun 20, 10:46 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 74 min |
| Jun 21, 12:01 AM CDT | Areal Flood Advisory | LOT | Iroquois | 6 hr |
| Jun 21, 1:34 AM CDT | River Flood Advisory | LOT | Iroquois, Kankakee | 36 hr |
| Jun 21, 6:16 AM CDT | River Flood Warning | LOT | Iroquois, Kankakee | 4 days |
| Jun 21, 6:16 AM CDT | River Flood Warning | LOT | Grundy, Will | 5 days |
| Jun 21, 6:33 AM CDT | River Flood Advisory | LOT | Iroquois | 36 hr |
| Jun 21, 9:01 AM CDT | Marine Dense Fog Advisory | LOT | 25 hr | |
| Jun 21, 9:39 AM CDT | River Flood Warning | LOT | Iroquois | 33 hr |
| Jun 21, 11:03 AM CDT | River Flood Warning | LOT | Grundy | 4 days |
| Jun 21, 3:06 PM CDT | Small Craft Advisory | LOT | 25 hr | |
| Jun 20, 9:50 PM CDT | Special Weather Statement | LOT | Lake, Porter | 40 min |
| Jun 20, 11:24 PM CDT | Severe Thunderstorm Warning | LOT | Benton, Jasper, Newton | 54 min |
Nearby
Flash Flood Warnings in Indiana, 2015Flash 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.