Alert archive / Indiana / Tornado Warnings in 2007
Tornado Warning 15, NWS Chicago, IL
NWS Chicago, IL issued this tornado warning at Aug 22, 2007, 11:38 PM CDT for Jasper County, Lake County, Porter County, Indiana. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 22, 2007, 11:38 PM CDT (04:38 UTC)
- Expired
- Aug 23, 2007, 12:13 AM CDT
- In force
- 35 min
- Issued by
- NWS Chicago, IL
- Area
- Counties, with a storm outline in the text
Counties Jasper County, IN, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 87 km from the middle of the area, began a volume at 04:41 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 4.6 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
- 1568 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1750 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 195 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 6.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KLOT 230439 TORLOT INC073-089-127-230545- /O.NEW.KLOT.TO.W.0015.070823T0438Z-070823T0545Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1138 PM CDT WED AUG 22 2007 THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A * TORNADO WARNING FOR... NORTHERN JASPER COUNTY IN NORTHWEST INDIANA... SOUTHEASTERN LAKE COUNTY IN NORTHWEST INDIANA... SOUTHERN PORTER COUNTY IN NORTHWEST INDIANA... * UNTIL 1245 AM CDT... * AT 1136 PM...NATIONAL WEATHER SERVICE RADAR INDICATED STRONG ROTATION IN A SEVERE THUNDERSTORM NEAR FOREST CITY...MOVING EAST AT 35 MPH. * THE TORNADO WILL BE NEAR... 4 MILES SOUTH OF KOUTS BY 1155 PM... DUNNS BRIDGE BY MIDNIGHT... TAKE COVER NOW IF NO BASEMENT IS AVAILABLE...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS LAT...LON 4126 8731 4117 8727 4116 8693 4142 8694 $$ RATZER
3 follow-up statements
000 WWUS53 KLOT 230447 SVSLOT SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1146 PM CDT WED AUG 22 2007 INC089-230456- /O.CAN.KLOT.TO.W.0015.000000T0000Z-070823T0545Z/ LAKE IN- 1146 PM CDT WED AUG 22 2007 ...THE TORNADO WARNING FOR LAKE COUNTY IS CANCELLED... THE SEVERE THUNDERSTORM WHICH PROMPTED THE TORNADO WARNING HAS MOVED OUT OF SOUTHEAST LAKE COUNTY. THEREFORE THE WARNING HAS BEEN CANCELLED. LAT...LON 4128 8723 4117 8727 4116 8693 4142 8694 $$ INC073-127-230545- /O.CON.KLOT.TO.W.0015.000000T0000Z-070823T0545Z/ JASPER IN-PORTER IN- 1146 PM CDT WED AUG 22 2007 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT FOR SOUTHERN PORTER AND NORTHERN JASPER COUNTIES... * AT 1146 PM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE A TORNADO NEAR DE MOTTE...AND MOVING EAST AT 35 MPH... THE TORNADO WILL BE NEAR... WHEATFIELD...AND 9 MILES SOUTH OF KOUTS BY 1155 PM... DUNNS BRIDGE BY MIDNIGHT... TAKE COVER NOW IF NO BASEMENT IS AVAILABLE...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS LAT...LON 4128 8723 4117 8727 4116 8693 4142 8694 $$ RATZER
000 WWUS53 KLOT 230500 SVSLOT SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1159 PM CDT WED AUG 22 2007 INC073-127-230545- /O.CON.KLOT.TO.W.0015.000000T0000Z-070823T0545Z/ JASPER IN-PORTER IN- 1159 PM CDT WED AUG 22 2007 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT FOR SOUTHEASTERN PORTER AND NORTHEASTERN JASPER COUNTIES... * AT 1159 PM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE A TORNADO 1 MILE SOUTH OF KOUTS...AND MOVING EAST AT 40 MPH. THE TORNADO WILL BE NEAR...3 MILES NORTH OF DUNNS BRIDGE BY 1205 AM CDT. TAKE COVER NOW IF NO BASEMENT IS AVAILABLE...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS LAT...LON 4130 8710 4124 8711 4116 8693 4142 8694 $$ RATZER
000 WWUS53 KLOT 230513 SVSLOT SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1211 AM CDT THU AUG 23 2007 INC073-127-230521- /O.CAN.KLOT.TO.W.0015.000000T0000Z-070823T0545Z/ JASPER IN-PORTER IN- 1211 AM CDT THU AUG 23 2007 ...THE TORNADO WARNING FOR SOUTHEASTERN PORTER AND NORTHEASTERN JASPER COUNTIES IS CANCELLED... AT 1211 AM CDT...RADAR INDICATED THAT THE SEVERE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA AND NO LONGER POSES A SEVERE WEATHER THREAT. HOWEVER...HEAVY RAIN...FREQUENT CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH CAN STILL BE EXPECTED ACROSS THE AREA. LAT...LON 4130 8710 4124 8711 4116 8693 4142 8694 $$ RATZER
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.
Hazardous weather outlook, Aug 22, 4:30 PM CDT, 7 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 430 PM CDT WED AUG 22 2007 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 230945- 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- 430 PM CDT WED AUG 22 2007 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST ILLINOIS...AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING...WITH THE GREATEST COVERAGE OF THESE THUNDERSTORMS EXPECTED CLOSER TO THE ILLINOIS WISCONSIN STATELINE. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS...MAINLY THIS EVENING...GENERALLY NORTH OF A LINE DIXON TO DEKALB TO WAUKEGAN. THE MAIN THREAT WILL BE DAMAGING WINDS. THERE IS A POTENTIAL FOR HEAVY RAINFALL TONIGHT...ESPECIALLY CLOSER TO THE ILLINOIS WISCONSIN STATELINE. GIVEN SATURATED SOIL CONDITIONS FROM THE RECENT HEAVY RAINS...ADDITIONAL HEAVY RAINFALL TONIGHT MAY LEAD TO FLOODING PROBLEMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THERE IS A GOOD CHANCE OF PERIODIC THUNDERSTORMS THURSDAY THROUGH FRIDAY NIGHT. HEAVY RAINFALL WILL BE POSSIBLE DURING THIS PERIOD. THERE IS THE POTENTIAL THAT STRONGER STORMS COULD PRODUCE DAMAGING WINDS OR LARGE HAIL. THERE IS ALSO THE POTENTIAL FOR ADDITIONAL SIGNIFICANT RAINFALL. GIVEN THE ALREADY SATURATED SOIL CONDITIONS FROM RECENT HEAVY RAINFALL...ANY AREAS THAT EXPERIENCE MULTIPLE ROUNDS OF HEAVY RAINFALL COULD EXPERIENCE SIGNIFICANT FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY THIS EVENING ACROSS FAR NORTHERN ILLINOIS. IN ADDITION...ANY REPORTS OF RAINFALL AMOUNTS OR FLOODING WILL BE APPRECIATED TONIGHT THROUGH FRIDAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-766-230945- WINTHROP HARBOR TO WILMETTE HARBOR IL- WILMETTE HARBOR TO NORTHERLY ISLAND IL- NORTHERLY ISLAND TO CALUMET HARBOR IL- CALUMET HARBOR IL TO GARY IN- GARY INDIANA TO BURNS HARBOR- BURNS HARBOR TO MICHIGAN CITY- LAKE MICHIGAN IL AND IN OPEN WATERS- 430 PM CDT WED AUG 22 2007 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS TONIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. ONE OR MORE PERIODS OF THUNDERSTORMS CAN BE EXPECTED FROM THURSDAY THROUGH FRIDAY NIGHT...WITH THE POTENTIAL FOR THE STRONGER STORMS TO PRODUCE STRONG WIND GUSTS. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO
In the hours before
Local storm report, Aug 22, 10:29 PM CDT, 1 hour 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1029 PM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1010 PM TSTM WND GST ROMEOVILLE 41.65N 88.09W
08/22/2007 M40.00 MPH WILL IL OFFICIAL NWS OBS
1021 PM HAIL MATTESON 41.51N 87.74W
08/22/2007 M0.25 INCH COOK IL AMATEUR RADIO
1024 PM HAIL WOODRIDGE 41.74N 88.04W
08/22/2007 M0.50 INCH DUPAGE IL AMATEUR RADIO
MARBLE SIZE HAIL AT I-55 AND LEMONT ROAD.
&&Local storm report, Aug 22, 10:34 PM CDT, 1 hour 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1034 PM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 PM TSTM WND DMG POLO 41.98N 89.58W
08/22/2007 OGLE IL CO-OP OBSERVER
EIGHT INCH DIAMETER TREE LIMBS BLOWN DOWN.
&&Local storm report, Aug 22, 10:39 PM CDT, 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1039 PM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1033 PM TSTM WND DMG MOKENA 41.53N 87.88W
08/22/2007 WILL IL LAW ENFORCEMENT
ONE TREE BLOWN DOWN AT ROUTE 30 AND WOLF ROAD.
&&Local storm report, Aug 22, 10:44 PM CDT, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1044 PM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1030 PM FLOOD ROMEOVILLE 41.65N 88.09W
08/22/2007 WILL IL AMATEUR RADIO
SIX TO EIGHT INCHES OF STANDING WATER ON ALEXANDER JUST
NORTH OF ROUTE 53.
1030 PM TSTM WND GST MONEE 41.42N 87.75W
08/22/2007 E40.00 MPH WILL IL AMATEUR RADIO
1040 PM TSTM WND DMG BRIDGEVIEW 41.74N 87.81W
08/22/2007 COOK IL AMATEUR RADIO
POWER LINES DOWN AT ROUTE 83 AND RICHLAND.
&&Local storm report, Aug 22, 11:15 PM CDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1115 PM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1107 PM TSTM WND DMG CREST HILL 41.57N 88.11W
08/22/2007 WILL IL AMATEUR RADIO
4 INCH DIAMETER TREE DOWN ON GAYLORD JUST NORTH OF
DIVISION
&&
CGITROLocal storm report, Aug 22, 11:26 PM CDT, 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1126 PM CDT WED AUG 22 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1106 PM FLASH FLOOD CHICAGO 41.88N 87.63W
08/22/2007 COOK IL NEWSPAPER
NORTHBOUND MICHIGAN AVE ENTRANCE TUNNEL TO NORTHBOUND
LAKE SHORE DR IS FLOODED. CHICAGO POLICE ONSCENE.
&&
CGITROThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 11:00 PM CDT | Flash Flood Warning | LOT | Lake | 4 hr |
| Aug 23, 12:57 PM CDT | Flash Flood Watch | LOT | Benton, Jasper, Lake, Newton, Porter | 40 hr |
| Aug 23, 3:25 PM CDT | Severe Thunderstorm Warning | LOT | Lake, Porter | 53 min |
Nearby
Tornado Warnings in Indiana, 2007Every tornado warning in 2007Tornadoes in 2007
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.