Alert archive / Illinois / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 38, NWS Chicago, IL

June 8, 2015Lake County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jun 8, 2015, 2:18 PM CDT for Lake County, Illinois. It was in force for 27 min. 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 8, 2015, 2:18 PM CDT (19:18 UTC)
Expired
Jun 8, 2015, 2:45 PM CDT
In force
27 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Lake County, IL

The radar

The Chicago radar (KLOT), 85 km from the middle of the area, began a volume at 19:21 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 12:00Z, 7.3 hours before the alert went out and 233 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.

Skew-T log-pSkew-T log-p diagram, Davenport, at 12:00Z on 2015-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2015-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -82 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
4 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
1477 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-82 m²/s²
0-3 km storm-relative helicity
17 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 8, 12:58 PM CDT, 1 hour 20 minutes earlier.

Area forecast discussion, Jun 8, 12:58 PM CDT, 1 hour 20 minutes before
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Hazardous weather outlook, Jun 8, 10:52 AM CDT, 3 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1052 AM CDT MON JUN 8 2015

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
091600-
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-
1052 AM CDT MON JUN 8 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS...THE STRONGEST MAY PRODUCE:
   HAIL UP TO THE SIZE OF QUARTERS.
   WIND GUSTS TO 60 MPH.

  AREAS AFFECTED AND TIMING:

   SCATTERED THUNDERSTORMS WILL DEVELOP OVER SOUTHERN WISCONSIN
   AROUND MIDDAY...THEN SHIFT SOUTHWARD OVER NORTHERN ILLINOIS
   AND NORTHWESTERN INDIANA THROUGH THE AFTERNOON. THESE
   THUNDERSTORMS WILL DIMINISH BY EARLY THIS EVENING.

  DISCUSSION:

   AS SURFACE TEMPERATURES WARM INTO THE LOWER TO MID 80S THIS
   AFTERNOON...UNSEASONABLY COLD AIR ALOFT ASSOCIATED WITH AN
   APPROACHING UPPER LEVEL DISTURBANCE WILL SHIFT OVER THE
   AREA. THIS WILL ALLOW FOR AMPLE INSTABILITY TO SUPPORT
   THUNDERSTORM DEVELOPMENT. ALTHOUGH WIDESPREAD SEVERE STORMS
   ARE NOT LIKELY WITH THIS ACTIVITY...SOME OF THE STRONGER
   STORMS COULD BECOME MARGINALLY SEVERE...WITH QUARTER SIZE
   HAIL...AND WIND GUSTS TO 60 MPH. THESE STORMS WILL DIMINISH
   ACROSS THE AREA BY EARLY THIS EVENING.

PORTIONS OF THE IROQUOIS AND KANKAKEE RIVERS WILL REMAIN IN
FLOOD.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

PORTIONS OF THE IROQUOIS AND KANKAKEE RIVERS WILL REMAIN AT
BANKFULL STAGE OR IN FLOOD THROUGH MID TO LATE WEEK.

PERIODIC THUNDERSTORMS ARE POSSIBLE TUESDAY NIGHT THROUGH
FRIDAY...AND AGAIN ON SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THROUGH THIS AFTERNOON.

&&

LMZ740>745-091600-
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-
1052 AM CDT MON JUN 8 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

STRONG WINDS WILL LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT
ALONG THE ILLINOIS SHORE AND PARTS OF THE INDIANA SHORE THIS
AFTERNOON.

SCATTERED THUNDERSTORMS ARE ALSO EXPECTED THIS AFTERNOON AND
EARLY EVENING. SOME OF THE STORMS MAY PRODUCE GUSTS IN EXCESS OF
35 KNOTS AND HAIL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

PERIODIC THUNDERSTORMS ARE POSSIBLE WEDNESDAY THROUGH FRIDAY AND
AGAIN SUNDAY.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-091600-
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-
1052 AM CDT MON JUN 8 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

AREAS OF DENSE FOG WILL CONTINUE THROUGH THIS AFTERNOON.

SCATTERED THUNDERSTORMS ARE EXPECTED TODAY AND EARLY THIS
EVENING. SOME OF THE STORMS MAY PRODUCE GUSTS IN EXCESS OF 35
KNOTS AND HAIL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

PERIODIC THUNDERSTORMS ARE POSSIBLE TUESDAY NIGHT THROUGH FRIDAY
AND AGAIN SUNDAY.

&&

RC

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 8, 9:45 AM CDT, 4 hours 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
945 AM CDT MON JUN 08 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0944 AM     HEAVY RAIN       CHESTERTON              41.60N 87.06W
06/08/2015  E1.40 INCH       PORTER             IN   TRAINED SPOTTER

            TOTAL FROM SUNDAY.

&&

C
Special weather statement, Jun 8, 1:53 PM CDT, 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
153 PM CDT MON JUN 8 2015

ILZ006-081930-
LAKE IL-
153 PM CDT MON JUN 8 2015

...SPECIAL WEATHER STATEMENT FOR NORTHERN LAKE COUNTY UNTIL 230 PM
CDT...

AT 152 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
CAMP LAKE...MOVING EAST AT 25 MPH.

WIND GUSTS OF 50 TO 55 MPH WILL BE POSSIBLE WITH THIS STORM. DIME
SIZE HAIL WILL ALSO BE POSSIBLE ALONG THE IMMEDIATE WISCONSIN
BORDER.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  ANTIOCH AROUND 200 PM CDT.
  WADSWORTH AROUND 220 PM CDT.
  WAUKEGAN...ZION...BEACH PARK AND WINTHROP HARBOR AROUND 230 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE OLD MILL CREEK.

INCLUDING THE FOLLOWING INTERSTATES...
 I-94 BETWEEN MILE MARKERS 1 AND 4.
 I-294 BETWEEN MILE MARKERS 1 AND 4.

THIS INCLUDES... LAKE COUNTY FIELDERS BASEBALL.

LAT...LON 4249 8781 4247 8780 4240 8781 4248 8819
      4249 8820
TIME...MOT...LOC 1852Z 289DEG 21KT 4253 8812

RC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 8:31 PM CDTAreal Flood AdvisoryLOTGrundy, LaSalle, Livingston4 hr
Jun 7, 8:33 PM CDTSpecial Weather StatementLOTFord, Grundy, Iroquois, Kankakee, Livingston72 min
Jun 7, 9:14 PM CDTRiver Flood WarningLOTIroquois67 hr
Jun 7, 9:25 PM CDTRiver Flood AdvisoryLOTIroquois4 days
Jun 7, 10:14 PM CDTFlash Flood WarningLOTIroquois, Kankakee5 hr
Jun 7, 11:10 PM CDTAreal Flood AdvisoryLOTFord, Grundy, Iroquois, Kankakee, LaSalle, Livingston and 1 more11 hr
Jun 8, 3:05 AM CDTSmall Craft AdvisoryLOT16 hr
Jun 8, 7:49 AM CDTRiver Flood WarningLOTIroquois27 days
Jun 8, 8:18 AM CDTRiver Flood AdvisoryLOTKankakee36 hr
Jun 8, 8:29 AM CDTMarine Dense Fog AdvisoryLOT44 hr
Jun 8, 12:00 PM CDTRiver Flood WarningLOTBureau, LaSalle, Putnam34 hr
Jun 8, 1:53 PM CDTSpecial Marine WarningLOT112 min
Jun 8, 2:38 PM CDTSevere Thunderstorm WarningLOTLake37 min
Jun 8, 2:45 PM CDTRiver Flood WarningLOTKankakee48 hr
Jun 8, 2:55 PM CDTRiver Flood AdvisoryLOTGrundy, Will52 hr
Jun 8, 2:55 PM CDTRiver Flood AdvisoryLOTGrundy16 hr
Jun 8, 3:16 PM CDTSevere Thunderstorm WarningLOTCook, Kane, Lake, McHenry44 min
Jun 8, 3:27 PM CDTSevere Thunderstorm WarningLOTDeKalb, Kane, Kendall, Lee50 min
Jun 8, 3:28 PM CDTSpecial Marine WarningLOT92 min
Jun 8, 3:36 PM CDTSpecial Marine WarningLOT84 min
Jun 8, 4:00 PM CDTSevere Thunderstorm WarningLOTCook, DuPage30 min
Jun 8, 4:33 PM CDTSevere Thunderstorm WarningLOTKane, Kendall42 min
Jun 8, 4:57 PM CDTSpecial Marine WarningLOT93 min
Jun 8, 5:31 PM CDTSpecial Marine WarningLOT59 min
Jun 8, 6:07 PM CDTSevere Thunderstorm WarningLOTFord, Iroquois, Livingston53 min
Jun 8, 6:38 PM CDTSevere Thunderstorm WarningLOTIroquois37 min
Jun 7, 9:14 PM CDTRiver Flood WarningLOTLake, Newton51 days
Jun 7, 9:25 PM CDTRiver Flood AdvisoryLOTJasper60 hr
Jun 7, 9:25 PM CDTRiver Flood AdvisoryLOTNewton4 days
Jun 8, 4:21 AM CDTRiver Flood WarningLOTJasper22 days
Jun 8, 7:49 AM CDTRiver Flood WarningLOTNewton26 days
Jun 8, 9:01 AM CDTRiver Flood WarningLOTJasper, Porter3 days
Jun 8, 3:56 PM CDTSevere Thunderstorm WarningLOTPorter49 min
Jun 8, 4:03 PM CDTSevere Thunderstorm WarningLOTLake14 min
Jun 8, 4:20 PM CDTSevere Thunderstorm WarningLOTLake40 min
Jun 8, 4:55 PM CDTAreal Flood AdvisoryLOTLake, Porter4 hr
Jun 8, 4:55 PM CDTSevere Thunderstorm WarningLOTLake, Porter56 min
Jun 8, 5:17 PM CDTFlash Flood WarningLOTLake, Porter6 hr
Jun 8, 6:02 PM CDTSevere Thunderstorm WarningLOTJasper, Lake, Newton, Porter43 min
Jun 8, 6:44 PM CDTSevere Thunderstorm WarningLOTJasper32 min
Jun 8, 6:53 PM CDTSevere Thunderstorm WarningLOTBenton, Newton37 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2015Every severe thunderstorm 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.