Alert archive / Indiana / Tornado Warnings in 2010

Tornado Warning 25, NWS Chicago, IL

June 23, 2010Lake County, Porter County, Indiana

NWS Chicago, IL issued this tornado warning at Jun 23, 2010, 6:48 PM CDT for Lake County, Porter County, Indiana. It was in force for 22 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 23, 2010, 6:48 PM CDT (23:48 UTC)
Expired: Jun 23, 2010, 7:10 PM CDT
In force: 22 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon

Counties Lake County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 73 km from the middle of the area, began a volume at 23:48 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 23, 2:10 PM CDT	Tornado Watch	SPC	7 hr

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jun 23, 5:06 PM CDT, 1 hour 42 minutes earlier.

Area forecast discussion, Jun 23, 5:06 PM CDT, 1 hour 42 minutes before

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Hazardous weather outlook, Jun 23, 4:45 PM CDT, 2 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
445 PM CDT WED JUN 23 2010

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
242145-
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-
445 PM CDT WED JUN 23 2010 /545 PM EDT WED JUN 23 2010/

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

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS...SOME COULD PRODUCE:

  DAMAGING WINDS IN EXCESS OF 80 MPH.
  HAIL TO THE SIZE OF GOLF BALLS.
  ISOLATED TORNADOES.
  HEAVY RAINFALL...WITH LOCALIZED FLASH FLOODING.

  AREAS AFFECTED AND TIMING:

  THUNDERSTORMS...SOME SEVERE...HAVE BEGUN TO MOVE INTO NORTH
  CENTRAL ILLINOIS LATE THIS AFTERNOON...AND ARE EXPECTED TO MOVE
  INTO THE CHICAGO METRO AREA SOUTHWEST TO LIVINGSTON AND LA SALLE
  COUNTY BETWEEN 5 PM AND 8 PM...THEN INTO NORTHWEST INDIANA AND
  EAST CENTRAL ILLINOIS INCLUDING IROQUOIS COUNTY BETWEEN 6 PM AND
  9 PM CDT.

  DISCUSSION:

  THE ATMOSPHERE CONTINUES TO DESTABILIZE AHEAD OF A COLD FRONT
  MOVING THROUGH THE REGION THIS EVENING. THUNDERSTORMS HAVE
  ALREADY DEVELOPED OVER PARTS OF IOWA AND ARE MOVING INTO NORTH
  CENTRAL ILLINOIS AT THIS HOUR. SEVERE WINDS...LARGE HAIL AND
  FUNNEL CLOUDS HAVE ALREADY BEEN REPORTED FROM THESE STORMS AS
  THEY MOVED ACROSS EASTERN IOWA...AND THE THREAT OF SEVERE
  WEATHER WILL PERSIST AS THEY CONTINUE TO MOVE ACROSS NORTHERN
  ILLINOIS AND NORTHWESTERN INDIANA.

  WINDS ALOFT ARE UNSEASONABLY STRONG...WHICH GIVEN THE
  INCREASINGLY UNSTABLE AIR MASS IS RESULTING IN AN EXTREMELY
  VOLATILE AND POTENTIALLY DANGEROUS SITUATION. INITIALLY THE
  THREAT WITH THE THUNDERSTORMS WILL BE VERY LARGE HAIL...LOCALLY
  DAMAGING WINDS...ALONG WITH SOME POTENTIAL FOR TORNADOES. AS
  THE STORMS MOVE EAST INTO EASTERN ILLINOIS AND NORTHWEST INDIANA
  IT APPEARS QUITE POSSIBLE THAT THEY WILL EVOLVE INTO A FAST
  MOVING LINE WITH THE POTENTIAL INCREASING FOR WIDESPREAD
  DAMAGING WINDS...SOME POSSIBLY QUITE SIGNIFICANT WITH GUSTS IN
  EXCESS OF 80 MPH.

  IN ADDITION TO SEVERE WEATHER...THE VERY WARM AND MOIST
  CONDITIONS WILL RESULT IN THESE STORMS PRODUCING LOCALLY HEAVY
  RAINFALL. THIS COULD LEAD TO FLOODING...AS THE GROUND REMAINS
  WET FROM REPEATED PERIODS OF HEAVY RAINFALL OVER THE PAST
  SEVERAL DAYS.

  HEAT INDEX VALUES MAY APPROACH 100 DEGREES LATE THIS AFTERNOON
  MAINLY SOUTH OF INTERSTATE 80.

  PORTIONS OF THE ILLINOIS RIVER...AND SUGAR CREEK...WILL REMAIN
  IN FLOOD.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

  THERE IS A CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY
  NIGHT.

  HOT AND HUMID WEATHER MAY PRODUCE HEAT INDEX VALUES NEAR 100
  DEGREES SATURDAY AND SUNDAY.

.SPOTTER INFORMATION STATEMENT...

  SPOTTERS WILL BE NEEDED LATER THIS AFTERNOON AND EVENING.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

LMZ740>745-242145-
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-
445 PM CDT WED JUN 23 2010

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

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORMS ARE LIKELY LATE THIS AFTERNOON INTO THIS
EVENING. THESE STORMS MAY PRODUCE WINDS IN EXCESS OF 60 KNOTS AND
CLOUD TO WATER LIGHTNING.

HAZARDOUS WINDS FOR SMALL CRAFT ARE LIKELY THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY NIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-242145-
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 TOW 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-
445 PM CDT WED JUN 23 2010

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

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND THIS
EVENING. STORMS MAY PRODUCE WIND GUSTS IN EXCESS OF 50 KNOTS AND
CLOUD TO WATER LIGHTNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE OF THUNDERSTORMS FROM FRIDAY NIGHT THROUGH
SUNDAY NIGHT.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

BMD

In the hours before

Local storm report, Jun 23, 6:31 PM CDT, 17 minutes before

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Local storm report, Jun 23, 6:32 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
632 PM CDT WED JUN 23 2010

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

0622 PM     TSTM WND GST     CHICAGO                 41.88N 87.63W
06/23/2010  E75 MPH          COOK               IL   TRAINED SPOTTER

            NEAR MIDWAY AIRPORT.

&&

ALYZA

Local storm report, Jun 23, 6:33 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
633 PM CDT WED JUN 23 2010

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

0621 PM     TSTM WND GST     CHICAGO                 41.88N 87.63W
06/23/2010  E60 MPH          COOK               IL   TRAINED SPOTTER

            TREES LEANING 40 DEGREES. ESTIMATED 60MPH.

&&

ALYZA

Local storm report, Jun 23, 6:35 PM CDT, 13 minutes before

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Local storm report, Jun 23, 6:45 PM CDT, 3 minutes before

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Local storm report, Jun 23, 6:47 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
647 PM CDT WED JUN 23 2010

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

0644 PM     FUNNEL CLOUD     BEECHER                 41.35N 87.61W
06/23/2010                   WILL               IL   TRAINED SPOTTER

            VIEWED FROM 1 MI SE OF BEECHER TOWARD THE NORTHEAST.

&&

ALYZA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 9:01 PM CDT	Flash Flood Watch	LOT	Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more	25 hr
Jun 22, 9:52 PM CDT	River Flood Advisory	LOT	Winnebago	59 hr
Jun 22, 9:52 PM CDT	River Flood Advisory	LOT	Winnebago	23 hr
Jun 22, 9:52 PM CDT	River Flood Advisory	LOT	Ogle	23 hr
Jun 23, 3:52 AM CDT	Small Craft Advisory	LOT		27 hr
Jun 23, 5:29 AM CDT	Severe Thunderstorm Warning	LOT	Ogle, Winnebago	61 min
Jun 23, 7:24 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, LaSalle	36 min
Jun 23, 8:42 AM CDT	Areal Flood Advisory	LOT	Boone, Cook, DeKalb, DuPage, Grundy, Kane and 10 more	5 hr
Jun 23, 8:58 AM CDT	Severe Thunderstorm Warning	LOT	Cook, Will	32 min
Jun 23, 9:11 AM CDT	Special Marine Warning	LOT		41 min
Jun 23, 4:19 PM CDT	Severe Thunderstorm Warning	LOT	Lee, Ogle	41 min
Jun 23, 4:40 PM CDT	Tornado Warning	LOT	DeKalb, Lee	50 min
Jun 23, 4:56 PM CDT	Special Marine Warning	LOT		3 hr
Jun 23, 5:01 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Kane, Lee, Ogle	44 min
Jun 23, 5:01 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Kane	59 min
Jun 23, 5:12 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Kane, Kendall, LaSalle	33 min
Jun 23, 5:24 PM CDT	Flash Flood Warning	LOT	Lee, Ogle	2 hr
Jun 23, 5:29 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Grundy, Kane, Kendall, LaSalle and 1 more	61 min
Jun 23, 5:39 PM CDT	Severe Thunderstorm Warning	LOT	Grundy, LaSalle, Livingston	66 min
Jun 23, 5:39 PM CDT	Tornado Warning	LOT	Cook, DuPage	66 min
Jun 23, 5:42 PM CDT	Flash Flood Warning	LOT	Cook, DeKalb, DuPage, Kane	4 hr
Jun 23, 6:00 PM CDT	Severe Thunderstorm Warning	LOT	DuPage	30 min
Jun 23, 6:03 PM CDT	Tornado Warning	LOT	Cook, DuPage, Will	57 min
Jun 23, 6:23 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Kankakee, Will	67 min
Jun 23, 6:24 PM CDT	Tornado Warning	LOT	Cook	25 min
Jun 23, 6:28 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Grundy, Iroquois, Kankakee, Livingston, Will	62 min
Jun 23, 6:33 PM CDT	Tornado Warning	LOT	Ford, Grundy, Iroquois, Kankakee, Livingston	27 min
Jun 23, 6:48 PM CDT	Severe Thunderstorm Warning	LOT	Grundy, LaSalle, Livingston	42 min
Jun 23, 9:06 AM CDT	River Flood Advisory	LOT	Newton	4 days

Nearby

Tornado Warnings in Indiana, 2010 Every tornado warning in 2010 Tornadoes in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.