Alert archive / Illinois / Flash Flood Watches in 2014
Flash Flood Watch 2, NWS Chicago, IL
NWS Chicago, IL issued this flash flood watch at Jun 30, 2014, 4:12 AM CDT for 14 counties in Illinois; Lake County, Porter County, Indiana. It took effect at Jun 30, 2014, 6:00 PM CDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Jun 30, 2014, 4:12 AM CDT (09:12 UTC)
- In effect from
- Jun 30, 2014, 6:00 PM CDT
- Expired
- Jul 1, 2014, 1:39 AM CDT
- In force
- 8 hr
- Issued by
- NWS Chicago, IL
- Flood severity
- None
Counties Boone County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, McHenry County, IL, Ogle County, IL, Winnebago County, IL, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 33 km from the middle of the area, began a volume at 09:11 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
Davenport, (KDVN), launched 00:00Z, 9.2 hours before the alert went out and 173 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
- 1816 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 1110 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 5.6
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at Jun 30, 3:51 AM CDT, 21 minutes earlier.
Area forecast discussion, Jun 30, 3:51 AM CDT, 21 minutes before
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</html>Hazardous weather outlook, Jun 29, 11:52 PM CDT, 4 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1152 PM CDT SUN JUN 29 2014 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 010500- 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- 1152 PM CDT SUN JUN 29 2014 /1252 AM EDT MON JUN 30 2014/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...OVERNIGHT. WEATHER HAZARDS EXPECTED: THUNDERSTORMS...SOME OF WHICH MAY PRODUCE: HEAVY DOWNPOURS. FREQUENT CLOUD TO GROUND LIGHTNING. WIND GUSTS OF 70 TO 80 MPH. QUARTER SIZE HAIL POSSIBLY A TORNADO. AREAS AFFECTED AND TIMING: THUNDERSTORMS WILL CONTINUE TO MOVE EASTWARD FROM NORTHWEST ILLINOIS AND EASTERN IOWA THROUGH OVERNIGHT. WHILE A SLOW WEAKENING TREND CONTINUES TO BE EXPECTED...SOME STORMS HAVE SHOWN POTENTIAL TO HAVE STRONG WINDS AND EVEN ROTATION CAPABLE OF TORNADOES. STORMS SHOULD GRADUALLY MOVE INTO NORTHEAST ILLINOIS AND POSSIBLY NORTHWEST INDIANA LATE AND INTO THE PREDAWN HOURS. DISCUSSION: THE AIR MASS ACROSS THE REGION CONTINUES TO BE MOIST WITH A GREAT DEAL OF INSTABILITY...ENOUGH TO AT LEAST PROVIDE THE POTENTIAL FOR SURFACE BASED STORMS IN NORTH CENTRAL ILLINOIS. THUS STRONG WINDS AND POSSIBLY A TORNADO OR TWO REMAIN THREATS WITH THIS BROKEN LINE OF STORMS AS IT MOVES INTO AND THROUGH NORTH CENTRAL ILLINOIS. PORTIONS OF THE IROQUOIS AND KANKAKEE RIVERS WILL REMAIN IN FLOOD. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THUNDERSTORMS ARE LIKELY LATER MONDAY AFTERNOON AND NIGHT...WITH THE INCREASING LIKELIHOOD FOR SEVERE STORMS IN THE REGION. STRONG DAMAGING WINDS...TORNADOES...LARGE HAIL...AND LOCALLY HEAVY RAINFALL WILL ALL BE POSSIBLE WITH THESE STORMS. WATER LEVELS WILL REMAIN HIGH ALONG PORTIONS OF THE KANKAKEE RIVER THROUGH AT LEAST THE MIDDLE OF THE WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS REQUESTED ACROSS NORTH CENTRAL ILLINOIS THROUGH EARLY OVERNIGHT. ACTIVATION WILL LIKELY BE NEEDED ACROSS MUCH OF THE AREA LATE MONDAY AFTERNOON INTO THE EVENING. && LMZ740>745-010500- 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- 1152 PM CDT SUN JUN 29 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...OVERNIGHT. SCATTERED THUNDERSTORMS ARE POSSIBLE. SOME STORMS MAY PRODUCE STRONG GUSTY WINDS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THUNDERSTORMS ARE LIKELY MONDAY AFTERNOON AND NIGHT...WITH THE POTENTIAL FOR SEVERE STORMS. STRONG WINDS MAY LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT MONDAY AFTERNOON AND AGAIN TUESDAY AFTERNOON. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-010500- 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- 1152 PM CDT SUN JUN 29 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. AREAS OF DENSE FOG ESPECIALLY OVER PORTIONS OF CENTRAL AND NORTHERN LAKE MICHIGAN TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS...SOME OF WHICH MAY PRODUCE STRONG WINDS ACROSS THE FAR SOUTHERN PART OF THE LAKE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THUNDERSTORMS ARE LIKELY ACROSS THE LAKE MONDAY AND MONDAY NIGHT...WITH SEVERE STORMS POSSIBLE OVER THE SOUTHERN HALF OF THE LAKE DURING THE AFTERNOON AND EVENING HOURS. AREAS OF DENSE FOG WILL PERSIST THROUGH MONDAY. && MTF VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE) FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT: WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV WWW.TWITTER.COM/NWSCHICAGO WWW.YOUTUBE.COM/NWSCHICAGO
In the hours before
Special weather statement, Jun 30, 2:52 AM CDT, 1 hour 20 minutes before
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</html>Special weather statement, Jun 30, 3:12 AM CDT, 1 hour before
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</html>Local storm report, Jun 30, 3:36 AM CDT, 36 minutes before
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</html>Local storm report, Jun 30, 4:00 AM CDT, 12 minutes before
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</html>Local storm report, Jun 30, 4:06 AM CDT, 6 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 |
|---|---|---|---|---|
| Jun 30, 12:03 AM CDT | Special Weather Statement | LOT | Winnebago | 27 min |
| Jun 30, 12:21 AM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry, Winnebago | 54 min |
| Jun 30, 12:34 AM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle | 56 min |
| Jun 30, 1:16 AM CDT | Severe Thunderstorm Warning | LOT | DeKalb, LaSalle, Lee, Ogle | 44 min |
| Jun 30, 1:23 AM CDT | Areal Flood Advisory | LOT | Boone, Winnebago | 6 hr |
| Jun 30, 1:50 AM CDT | Tornado Warning | LOT | McHenry | 40 min |
| Jun 30, 1:57 AM CDT | Special Weather Statement | LOT | DeKalb, Kane, Kendall | 33 min |
| Jun 30, 2:31 AM CDT | Special Weather Statement | LOT | Lake | 29 min |
| Jun 30, 2:52 AM CDT | Special Weather Statement | LOT | LaSalle | 23 min |
| Jun 30, 3:12 AM CDT | Special Weather Statement | LOT | Grundy, Livingston | 33 min |
| Jun 30, 3:45 AM CDT | Special Weather Statement | LOT | Lake | 45 min |
| Jun 30, 3:52 AM CDT | Special Marine Warning | LOT | 83 min | |
| Jun 30, 4:35 AM CDT | Areal Flood Advisory | LOT | Grundy, LaSalle, Livingston | 4 hr |
| Jun 30, 5:51 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 54 min |
| Jun 30, 6:21 AM CDT | Special Marine Warning | LOT | 54 min | |
| Jun 30, 6:30 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 60 min |
| Jun 30, 6:44 AM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Livingston | 6 hr |
| Jun 30, 10:03 AM CDT | River Flood Watch | LOT | Winnebago | 8 days |
| Jun 30, 10:03 AM CDT | River Flood Watch | LOT | Winnebago | 7 days |
| Jun 30, 10:03 AM CDT | River Flood Watch | LOT | Ogle | 5 days |
| Jun 30, 10:03 AM CDT | River Flood Watch | LOT | Winnebago | 4 days |
| Jun 30, 11:08 AM CDT | River Flood Watch | LOT | Lake | 7 days |
| Jun 30, 11:27 AM CDT | River Flood Watch | LOT | LaSalle | 4 days |
| Jun 30, 12:27 PM CDT | River Flood Advisory | LOT | Kane, Kendall | 7 days |
| Jun 30, 3:47 PM CDT | Special Weather Statement | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 10 more | 43 min |
| Jun 30, 4:53 PM CDT | Areal Flood Advisory | LOT | Lee, Ogle, Winnebago | 6 hr |
| Jun 30, 5:30 PM CDT | Special Marine Warning | LOT | 2 hr | |
| Jun 30, 6:14 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DeKalb, DuPage, Kane, Kendall, Will | 61 min |
| Jun 30, 6:22 PM CDT | Special Marine Warning | LOT | 113 min | |
| Jun 30, 6:24 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Kane, Kendall, Lake, Will | 4 hr |
| Jun 30, 6:48 PM CDT | Severe Thunderstorm Warning | LOT | Kendall, Will | 27 min |
Nearby
Flash Flood Watches in Illinois, 2014Flash Flood Watches in Indiana, 2014Every flash flood watch in 2014
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.