Extensive damage was sustained from two separate lines of thunderstorms on Monday, June 30th which was officially determined to be from two separate derecho events from Central Iowa east into Michigan and Ohio. Thunderstorms developed over Iowa during the early afternoon and organized into a forward-propagating quasi-linear convective system (QLCS) and tracked to southern Lake Michigan by early…
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LOT wrote it up.
Extensive damage was sustained from two separate lines of thunderstorms on Monday, June 30th which was officially determined to be from two separate derecho events from Central Iowa east into Michigan and Ohio. Thunderstorms developed over Iowa during the early afternoon and organized into a forward-propagating quasi-linear convective system (QLCS) and tracked to southern Lake Michigan by early to mid evening. Meanwhile, a second complex of intense thunderstorms developed over central and eastern Iowa and also evolved into a QLCS, tracking across northern Illinois and northwest Indiana late in the evening into the overnight hours.
Across northern Illinois and northwest Indiana, the first derecho event produced scattered straight-line wind damage, with gusts measured as high as 70 MPH. The second derecho produced far more extensive damage, with 80 to 90 MPH straight line winds and numerous tornadoes. Initial post-event surveys cataloged 18 tornadoes across northern Illinois and northwest Indiana, 17 of EF1 intensity and one of EF0 intensity. Of these 18 tornadoes, 14 were associated with a pair of large mesovortices that traveled along the Kankakee River Valley in Kankakee County, Illinois and Lake, Newton, and Jasper Counties in Indiana.
Analysis of Google Earth satellite imagery gathered in spring of 2015 showed numerous additional areas of damage not documented in the original survey efforts. A thorough analysis of this imagery and synthesis with the original survey information led to a complete reanalysis of the Kankakee Valley tornadoes. Ultimately, 18 tornado tracks were identified alone in the Kankakee Valley, leading to a total of 22 tornadoes for northern Illinois and northwest Indiana. Of the 18 revised tornadoes, 16 of the paths were determined, in part, using satellite imagery. Further re-examination of the damage also led to a change in rating for several of the damage locations. Of the 18 reanalyzed Kankakee Valley tracks, two were rated EF2, 13 were rated EF1, and three were rated EF0. Additional details on this reanalysis, including the methods used, can be found in the Electronic Journal of Severe Storms Meteorology (Lyza et al. 2019, A Multi-Platform Reanalysis of the Kankakee Valley Tornado Cluster on 30 June 2014 ).
The local office's own words before the first event, 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 the first event at Jun 30, 4:25 PM CST, 2 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
525 PM CDT MON JUN 30 2014
.MESOSCALE DISCUSSION...521 PM
THE CURRENT FOCUS IS WITH THE AREA OF STRONG CONVECTION JUST WEST OF
BUREAU COUNTY. THE LATEST RADAR IMAGERY INDICATES A REAR INFLOW JET
TRYING TO DEVELOP...WHICH COULD FAVOR THIS STORM TO TRANSITION INTO
ANOTHER FORWARD PROPAGATING BOWING SEGMENT WITHIN THE HALF HOUR. IF
THIS DOES OCCUR...THIS BOWING SEGMENT WOULD LIKELY SHIFT EAST-
NORTHEASTWARD ACROSS THE I-80 TO I-88 CORRIDORS OVER THE NEXT
COUPLE HOURS...POSSIBLY IMPACTING THE CHICAGO AREA AROUND 7 PM. WE
WILL BE MONITORING THIS CLOSELY.
THE OTHER CONCERN IS FOR FLASH FLOODING ACROSS THE AREA. CONVECTIVE
ACTIVITY IS BEGINNING TO LINE UP WEST TO EAST ACROSS WESTERN
ILLINOIS...AND OBJECTIVE SURFACE ANALYSIS SUGGESTS THAT THIS AREA
IS ALONG THE GRADIENT OF A STRONGLY UNSTABLE ATMOSPHERE...WITH
AROUND 5000 J/KG MLCAPE AND 2 INCH PWATS...AS INDICATED FROM
LATEST RAP MESOANALYSIS. WITH STRONG LOW LEVEL MOISTURE CONTINUING
TO STREAM INTO THIS AREA VIA STOUT SOUTHERLY WINDS...CONTINUED
REGENERATION OF STORMS IS LIKELY ACROSS WESTERN ILLINOIS...AND
THESE STORMS WILL MOVE EAST...SETTING UP TRAINING STORMS. THIS
ACTIVITY INCREASES THE THREAT OF FLASH FLOODING ACROSS NORTHERN
ILLINOIS...AND AS SUCH...WE HAVE EXPANDED THE FLASH FLOOD MUCH FOR
MUCH OF THE AREA THROUGH TONIGHT.
KJB
&&
.DISCUSSION...
117 PM CDT
THIS EVENING/OVERNIGHT...
MAIN CONCERN FOR THIS EVENING THROUGH MIDNIGHT WILL BE ON SEVERE
WEATHER TIMING/COVERAGE/INTENSITY. THE SPC HAS EXPANDED THE ENTIRE
FORECAST AREA INTO THE MODERATE RISK FOR SEVERE WEATHER TODAY...WITH
THE FOCUS BEING ON DAMAGING WINDS IN EXCESS OF 70MPH AND LARGE HAIL.
GIVEN THE HIGH DEW POINTS...AND PWAT VALUES ARND 1.5 TO
1.75"...WHATEVER CONVECTION OCCURS COULD BE VERY EFFICIENT AT
PRODUCING TORRENTIAL DOWNPOURS AND AS SUCH WOULD INTRODUCE A
FLOODING CONCERN DESPITE STORMS FORWARD PROPAGATION. WHILE THE
PROBABILITY IS NOT ZERO FOR AN ISOLATED TORNADO...THE GREATEST FOCUS
FOR THIS WILL BE WELL WEST OF THE FORECAST AREA IN IOWA. IF WINDS
CAN BACK TO THE SOUTHEAST HOWEVER...THIS WOULD INTRODUCE INCREASED
HELICITY TO THE AREA.
THE FOCAL POINT FOR CONVECTION HAS BEEN ON THE ACTIVITY PRESENTLY
ONGOING IN EASTERN NEBRASKA/WESTERN IOWA. VISIBLE IMAGERY HAS A
BOUNDARY DEPICTED ACROSS SOUTHWEST IOWA STRETCHING EAST TO JUST
SOUTH OF MOLINE THEN TURNING SOUTHEAST ACROSS SOUTHCENTRAL IL TO
JUST SOUTH OF TERRE HAUTE IN. ALONG AND SOUTH OF THIS BOUNDARY DEW
PTS ARE GENERALLY IN THE LOW/MID 70S...WHILE TO THE NORTH DEW POINTS
ARE IN THE UPR 60S. THE EXCEPTION IS OVER THE SOUTHERN CWFA WHERE
DEW POINTS HAVE BEEN ABLE TO BUMP BACK INTO THE LOW 70S WITH A
SOUTHERLY WIND. THE WINDS ARE BACKED TO THE SOUTHEAST/EAST EARLY
THIS AFTN OVER SOUTHCENTRAL IOWA...AND WITH THE CIRRUS SHIELD
BEGINNING TO THIN OVER EASTERN IOWA EARLY THIS AFTN...THE ATMOSPHERE
SHUD ONLY FURTHER DESTABILIZE.
HI-RES GUIDANCE CONTINUES TO FOCUS A LINE SEGMENT PUSHING INTO
EASTERN IOWA BY 20-22Z...THEN THERE IS SOME SLIGHT DIFFERENCES ON
HOW THIS FEATURE ARRIVES ACROSS NORTHERN IL/NORTHWEST IN ALONG WITH
TIMING. NONETHELESS...GIVEN THE AFOREMENTIONED BUOYANT ATMOSPHERE
AND UNIDIRECTIONAL MEAN LAYER FLOW...IT DOES SUPPORT THIS LINE OF
CONVECTION THAT ARRIVES ACROSS FAR WESTERN/NORTHWESTERN IL TO MORPH
INTO A BOWING SEGMENT AND POSSIBLY TRANSITION INTO A DERECHO TYPE
EVENT...WHICH WOULD LIKELY BEGIN TO TURN SOUTHEAST ACROSS THE
FORECAST AREA THIS EVENING.
ACTIVITY LEVEL SHOULD QUICKLY LEVEL OFF LATER THIS EVENING...WITH
THE TIMING TO HAVE PUSHED THRU THE CWFA BEFORE MIDNIGHT. THEN THE
DRY SLOT ARRIVES...HOWEVER HAVE OPTED TO HOLD ONTO SOME LINGERING
SHRA/TSRA OVERNIGHT. CONFIDENCE IS RATHER LOW THAT ANY ACTIVITY WILL
BE REMAINING...SO THIS MAY BE ABLE TO BE REMOVED LATER THIS EVENING
AND GO WTIH A DRY OVERNIGHT.
TUESDAY THROUGH THURSDAY...
LEADING VORT WILL PIVOT EAST OF THE REGION EARLY TUE...WITH THE DRY
SLOT STILL BEING PROGGED TO KEEP DRY CONDS OVER THE FORECAST AREA
THRU THE BULK OF THE DAY TUE. BY MID/LATE AFTN THE MID-LVL TROUGH
AXIS APPROACHES FROM THE NORTHWEST...AND WITH ANY SFC
DESTABILIZATION...A FEW ISO TSRA COULD DEVELOP FROM THE STEEP LAPSE
RATES AND COOLING IN THE MID-LVLS. WITH THE FLOW REMAINING
PROGRESSIVE...THE TROUGH AXIS SLIDES OVERHEAD BY 03Z WED AND SHUD
BRING A QUICK END TO ANY DIURNALLY DRIVEN SHRA/TSRA ACROSS THE CWFA
WITH A DRY OVERNIGHT PERIOD. GUIDANCE IS ALSO INDICATING A TRAILING
WEAK TROUGH SLIDING INTO THE CENTRAL PLAINS WED MORNING...WITH AN
ABUNDANCE OF LOW/MID LVL MOISTURE WRAPPING AROUND THE WESTERN GREAT
LAKES REGION. THIS WILL LIKELY BRING A CHC FOR LIGHT SHOWERS FOR
WED. WITH CONSIDERABLE SOLAR SHIELDING WED...AND A THERMAL TROUGH OF
6 TO 8 DEG C OVERHEAD...TEMPS COULD STRUGGLE TO WARM BEYOND 70-74
FOR NORTHERN IL/NORTHWEST IN. IT IS PLAUSIBLE THAT A FEW POINTS IN
FAR NORTHERN IL THAT REMAIN IN THE UPR 60S WED AFTN.
BROAD TROUGH THEN PUSHES EAST WED NGT...WITH SFC ANTI-CYCLONIC
FEATURE BUILDING IN FROM THE WEST. THIS FEATURE WILL HELP TO DRY THE
LOW-LEVELS OUT AND ALLOW WINDS TO TURN NORTHWEST TO NORTH. THEN FOR
THUR THE NORHTERLY DRY FLOW WILL BRING SUNNY SKIES WITH TEMPS
GENERALLY IN THE 70S. A LAKE BREEZE LOOKS LIKELY AND COULD KEEP ON
ONSHORE FLOW FOR THE ADJACENT LAKESHORE COMMUNITIIES AND TEMPS IN
THE 60S.
CONFIDENCE...HIGH.
FRIDAY THROUGH MONDAY...
ENSEMBLES CONTINUE TO PROG A RIDGE ACROSS THE CANADIAN ROCKIES FOR
THE END OF THE WORK WEEK...ALLOWING A DOWNSTREAM TROUGH TO BE OVER
THE GREAT LAKES/NORTHEAST CONUS. AS THE WEEKEND PROGRESSES THE WAVE
WILL BEGIN TO RELAX...ALTHOUGH THE MID-LVL TROUGH WILL DRIFT EAST BY
SAT/SUN OVER THE UPPER MIDWEST/NORTH OF LAKE SUPERIOR. THIS SHUD
ALLOW TEMPS TO SLOWLY RETURN TO NEAR SEASONAL CONDS. ALTHOUGH AS THE
WEEKEND PROGRESSES...THE LONGWAVE PATTERN DOES TRANSITION INTO A
SEMI-ZONAL FLOW WITH HEIGHTS STEADILY INCREASING ACROSS THE ENTIRE
CONUS. TEMPS FOR FRI SHUD CONTINUE TO BE SUB-SEASONAL IN THE 70S
NEAR 80...THEN BACK TO ARND 80 OR LOW 80S FOR THE WEEKEND. EARLY
NEXT WEEK THE PATTERN DOES APPEAR TO POINT TOWARDS TEMPS RETURNING
TO LOW/MID 80S. IN ADDITION TO THE SEMI-ZONAL FLOW...IT DOES SUPPORT
A QUICK WEST-EAST FLOW OF WEAK WAVES. THIS COULD EASILY BRING A LOW
CHC POPS FOR THE WEEKEND/EARLY NEXT WEEK.
CONFIDENCE...HIGH.
BEACHLER
&&
.AVIATION...
//ORD AND MDW CONCERNS...UPDATED 18Z...
* SOUTHWEST WINDS BECOMING MORE SOUTHERLY WITH INCREASING
SPEEDS/GUSTS THIS AFTERNOON.
* TSRA LATE AFTERNOON THROUGH MID EVENING WITH STRONG/ERRATIC
WINDS AND HEAVY RAIN.
* POSSIBLE MVFR CONDITIONS UNDER HEAVIEST THUNDERSTORM.
RODRIGUEZ
//DISCUSSION...UPDATED 18Z...
RELATIVELY QUIET CONDITIONS TO START THE FORECAST PERIOD WITH
SOUTHWEST WINDS AND ONLY HIGH LEVEL CIRRUS IN PLACE. THIS WILL
LIKELY CHANGE LATER THIS AFTERNOON AND EVENING AS A COMPLEX OF
THUNDERSTORMS CURRENTLY OVER IOWA TRACKS EAST TOWARDS THE
TERMINALS. CURRENTLY MONITORING THUNDERSTORMS OVER CENTRAL IOWA
WHICH WILL EITHER BE THE THUNDERSTORMS TO MOVE THROUGH THE
TERMINALS LATER TODAY OR WILL AT LEAST BE ASSOCIATED WITH THE
EXPECTED THUNDERSTORMS. HIGH CONFIDENCE DOES EXIST WITH THE
POTENTIAL FOR THUNDERSTORMS OVER THE TERMINALS LATE THIS AFTERNOON
INTO THE EVENING...BUT THERE DOES REMAIN SOME UNCERTAINTY WITH
EXACT TIMING. IF THE SYSTEM BECOMES MORE ORGANIZED OVER THE NEXT
ONE TO TWO HOURS...IT WOULD THEN QUICKLY TRACK EAST TOWARDS THE
TERMINALS AND POSSIBLY REACH THEM BEFORE THE TAF TIMES OF AROUND
23Z. IF NOT...THE CURRENT TIME...IF NOT LATER...WOULD BE A MORE
PREFERRED TIMING. WILL CONTINUE TO CLOSELY MONITOR TRENDS AND
ADJUST TIMES AS NECESSARY. THESE STORMS DO HAVE THE POTENTIAL TO
BE SEVERE...WITH HIGH WIND GUSTS IN EXCESS OF 70 MPH POSSIBLE. NOT
ONLY IS LOWER VIS LIKELY WITH THESE THUNDERSTORMS...BUT MVFR CIGS
ARE A DEFINITE POSSIBILITY AS WELL. DEPARTING COMPLEX LATER THIS
EVENING WILL RESULT IN LINGERING VFR CIGS TONIGHT...WITH A HIGHLY
ERRATIC WIND FIELD LIKELY. DID NOT CONVEY THE POSSIBLE WIND FIELD
ON THE BACKSIDE OF THE THUNDERSTORMS AND WILL LIKELY ADD THIS
LATER...BUT WITH SOME TEMPORARY EASTERLY COMPONENT POSSIBLE BEFORE
THEY SHIFT BACK TO THE SOUTHWEST.
RODRIGUEZ
//ORD AND MDW CONFIDENCE...UPDATED 18Z...
* MEDIUM HIGH CONFIDENCE WITH WIND SPEED/GUSTS/DIRECTION DURING
FORECAST PERIOD...LOW CONFIDENCE OF WIND DIRECTION DURING AND
AFTER THUNDERSTORMS.
* HIGH FOR TSRA LATE AFTERNOON THROUGH MID EVENING...MEDIUM ON
TIMING.
* MEDIUM CONFIDENCE FOR MVFR CONDITIONS.
RODRIGUEZ
//OUTLOOK FOR ORD/MDW FOR 00Z WEDNESDAY-12Z MONDAY...UPDATED 12Z...
* TUESDAY NIGHT...DRY/VFR.
* WEDNESDAY...CHANCE OF SHRA.
* THURSDAY THROUGH SATURDAY...DRY/VFR.
* SUNDAY...SLIGHT CHANCE OF TSRA.
&&
.MARINE...
303 PM CDT
PRIMARY MARINE CONCERN IS OVER THE NEARSHORE WATERS AND SOUTH HALF
THIS EVENING AS AN INTENSE COMPLEX OF THUNDERSTORMS LIKELY HOLDS
TOGETHER AND BRINGS A PERIOD OF DANGEROUSLY STRONG WINDS AND
FREQUENT LIGHTNING. HAVE LEFT THE DENSE FOG ADVISORY FOR THE NORTH
HALF UNTIL THIS EVENING. BEFORE CLOUDS MOVED OVERHEAD...VISIBLE
SATELLITE SHOWED A BANK OF FOG COVERING MUCH OF THE NORTHERN PART
OF THE LAKE. SYNOPTIC SOUTHERLY WINDS STILL MAY BECOME STRONG
ENOUGH FOR SMALL CRAFT CRITERIA THIS EVENING IN THE NEARSHORE BUT
DO NOT HAVE ENOUGH CONFIDENCE TO HOIST AN ADVISORY.
HAVE BETTER CONFIDENCE IN SMALL CRAFT WIND CRITERIA BEING MET ON
TUESDAY. TIGHT PRESSURE GRADIENT AND DEEP MIXING FROM LAND WILL
LIKELY RESULT IN WEST-SOUTHWEST WINDS AROUND 20 KT AND FREQUENT
GUSTS TO 25 KT OR EVEN A BIT HIGHER LATE TUESDAY MORNING THROUGH
LATE TUESDAY AFTERNOON. HAVE SOME CONCERN THAT GUSTY WINDS MAY
EXTEND A BIT INTO TUESDAY EVENING. HIGH PRESSURE WILL SPREAD OVER
THE LAKE THURSDAY INTO FRIDAY AND ONLY SLOWLY MOVE EASTWARD ON
SATURDAY. AN FAIRLY EXTENDED PERIOD OF LIGHT WINDS WITH DIRECTIONS
NEAR THE SHORES CONTROLLED BY LAKE BREEZE INFLUENCES BY DAY WILL
ENSUE WEDNESDAY NIGHT THROUGH AT LEAST FRIDAY NIGHT. MODEST
SOUTHERLY WINDS WILL DEVELOP ON SATURDAY AS THE HIGH SLIDES EAST.
RC
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...FLASH FLOOD WATCH...ILZ003-ILZ004-ILZ005-ILZ006-ILZ008-ILZ010-
ILZ011-ILZ012-ILZ013-ILZ014-ILZ019-ILZ020-ILZ021-ILZ022-
ILZ023-ILZ032 UNTIL 4 AM TUESDAY.
IN...FLASH FLOOD WATCH...INZ001-INZ002 UNTIL 4 AM TUESDAY.
LM...DENSE FOG ADVISORY...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565-
LMZ567-LMZ868 UNTIL 9 PM MONDAY.
SMALL CRAFT ADVISORY...LMZ740-LMZ741-LMZ742-LMZ743-LMZ744-
LMZ745...9 AM TUESDAY TO 7 PM TUESDAY.
&&
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/NWSCHICAGOHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 328 PM CDT MON JUN 30 2014 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 012030- 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- 328 PM CDT MON JUN 30 2014 /428 PM EDT MON JUN 30 2014/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. WEATHER HAZARDS EXPECTED: SEVERE THUNDERSTORMS...SOME OF WHICH MAY PRODUCE: WIND GUSTS IN EXCESS OF 70 MPH. ISOLATED GUSTS IN EXCESS OF 90 MPH. POSSIBLY A TORNADO. HAIL UP TO 2 INCHES IN DIAMETER. TORRENTIAL RAINFALL AND LOCALIZED FLOODING. FREQUENT CLOUD TO GROUND LIGHTNING. AREAS AFFECTED AND TIMING: A LINE OF THUNDERSTORMS HAS ALREADY DEVELOPED OVER EAST CENTRAL IOWA AND IS EXPECTED TO ARRIVE OVER NORTHERN ILLINOIS AROUND 530PM CDT AND CONTINUE TO PUSH EAST NEARING NORTHWEST INDIANA BY 7 PM CDT. SOME OF THESE STORMS MAY BE SEVERE AND MAY ALSO PRODUCE LOCALLY HEAVY RAINFALL THIS EVENING. THUNDERSTORMS WILL THEN DIMINISH AND GRADUALLY MOVE EAST OF THE AREA LATER THIS EVENING. DISCUSSION: THE COMBINATION OF STRONG INSTABILITY...STRONG WINDS ALOFT... AND THE APPROACHING LOW PRESSURE IS EXPECTED TO RESULT IN SEVERE THUNDERSTORMS ARRIVING IN WEST CENTRAL ILLINOIS THIS AFTERNOON. THESE STORMS WILL SPREAD EAST INTO NORTHERN ILLINOIS AND NORTHWEST INDIANA THROUGH THE EVENING HOURS. THE LINE OF STORMS IS EXPECTED TO DEVELOP INTO AN EASTWARD MOVING COMPLEX WITH A SIGNIFICANT POTENTIAL FOR DAMAGING WINDS ACROSS NORTHERN ILLINOIS AND NORTHWEST INDIANA THIS EVENING. WIND GUSTS IN EXCESS OF 70 MPH...WITH AN ISOLATED GUST IN EXCESS OF 90 MPH POSSIBLE. PORTIONS OF THE KANKAKEE RIVERS WILL REMAIN IN FLOOD. OTHER AREA STREAMS WILL REMAIN NEAR BANKFULL CONDITIONS...HOWEVER WITH ADDITIONAL RAINFALL EXPECTED A FEW SITES MAY APPROACH FLOOD STAGE AGAIN. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO SUNDAY. PORTIONS OF THE KANKAKEE RIVERS WILL REMAIN IN FLOOD. OTHER AREA STREAMS WILL REMAIN NEAR BANKFULL CONDITIONS...HOWEVER WITH ADDITIONAL RAINFALL A FEW SITES MAY APPROACH FLOOD STAGE AGAIN. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON THROUGH THIS EVENING. && LMZ740>745-012030- 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- 328 PM CDT MON JUN 30 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THUNDERSTORMS ARE LIKELY THIS EVENING THROUGH TONIGHT...WITH SEVERE THUNDERSTORMS POSSIBLE DURING THE EVENING. WIND GUSTS IN EXCESS OF 60 KNOTS WILL BE POSSIBLE THIS EVENING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. GUSTY WEST WINDS MAY PRODUCE HAZARDOUS CONDITIONS FOR SMALL CRAFT ON TUESDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO SUNDAY. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-012030- 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- 328 PM CDT MON JUN 30 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THUNDERSTORMS...SOME OF WHICH MAY BE SEVERE...ARE EXPECTED OVER MUCH OF THE LAKE LATER THIS AFTERNOON AND TONIGHT. WIND GUSTS IN EXCESS OF 60 KNOTS WILL BE POSSIBLE. PATCHY DENSE FOG IS POSSIBLE ACROSS THE NORTHERN HALF OF THE LAKE THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. PATCHY DENSE FOG MAY LINGER MAINLY ACROSS NORTHERN LAKE MICHIGAN THROUGH TUESDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO SUNDAY. && BEACHLER 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
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
226 PM CDT MON JUN 30 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0220 PM HEAVY RAIN STREATOR 41.13N 88.83W
06/30/2014 M1.45 INCH LA SALLE IL TRAINED SPOTTER
RAINFALL TOTAL FROM THIS MORNING.
&&
CSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
347 PM CDT MON JUN 30 2014
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-302130-
BOONE IL-COOK IL-DE KALB IL-DUPAGE IL-FORD IL-GRUNDY IL-IROQUOIS IL-
KANE IL-KANKAKEE IL-KENDALL IL-LA SALLE IL-LAKE IN-LAKE IL-LEE IL-
LIVINGSTON IL-MCHENRY IL-OGLE IL-WILL IL-WINNEBAGO IL-
347 PM CDT MON JUN 30 2014
...LINE OF LIKELY SEVERE THUNDERSTORMS EXPECTED DURING RUSH HOUR...
AT 436 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THIS LINE OF THUNDERSTORMS MOVING INTO FAR WESTERN ILLINOIS. THIS
LINE IS MOVING AT APPROXIMATELY 55 MPH TO THE EAST. AT THE CURRENT
SPEED IT IS EXPECTED TO ARRIVE ALONG INTERSTATE 39 AROUND 430 PM
CDT...AND WILL ARRIVE NEAR THE WESTERN SUBURBS OF CHICAGO AROUND 530
PM CDT...THEN DOWNTOWN CHICAGO AROUND 6 PM CDT. THIS LINE OF STORMS
HAS HAD A HISTORY OF PRODUCING WIND GUSTS IN EXCESS OF 60 MPH. A FEW
GUSTS IN EXCESS OF 80 WILL ALSO BE POSSIBLE. IN ADDITION TO THE
DAMAGING WIND GUSTS...HAIL UP TO 2 INCHES IN DIAMETER...FREQUENT
LIGHTNING...AND TORRENTIAL DOWNPOURS WILL ALSO BE POSSIBLE.
OTHER LOCATIONS AFFECTED...
ARGONNE NATIONAL LABORATORY...AURORA UNIVERSITY...BENEDICTINE
UNIVERSITY...BOONE COUNTY FAIRGROUNDS...BROOKFIELD ZOO...BUFFALO ROCK
STATE PARK...NAVY PIER...U.S. CELLULAR FIELD...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE PREPARED TO SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS LINE OF
THUNDERSTORMS PASS BY. HAVE A MEANS TO RECEIVE WARNINGS IN THE EVENT
THAT ONE IS ISSUED...WHICH WILL PROVIDE SPECIFIC INFORMATION AS TO
WHAT ACTIONS TO TAKE ALONG WITH THE LOCATION OF THE STORM.
&&
LAT...LON 4249 8779 4223 8781 4208 8767 4177 8756
4169 8749 4164 8736 4153 8733 4085 8799
4088 8894 4092 8894 4092 8905 4110 8905
4111 8917 4158 8917 4159 8964 4192 8963
4193 8969 4220 8970 4221 8940 4250 8940
BEACHLERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
527 PM CDT MON JUN 30 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0519 PM TSTM WND DMG ROCKFORD 42.27N 89.06W
06/30/2014 WINNEBAGO IL TRAINED SPOTTER
40 MPH SUSTAINED WIND. LOCATION ROUTE 90 MILE MARKER 184.
&&
CThe Milwaukee radar (KMKX), 72 km away, was scanning. The volume nearest the first event began at 22:29 UTC.
40 thunderstorm wind, 15 tornado, 5 flash flood, 4 lightning, 2 hail. Local standard time, as filed.
Roof shingles were ripped off near Route 173 and Caledonia Road.
A six inch diameter tree was blown down on White Oaks Road approximately six miles south of the state line.
A six inch diameter tree was blown down near Naperville-Plainfield Road and 135th Street.
Large tree branches were blown down approximately half a mile west of Central Avenue and 159th street.
Shingles were blown off a roof.
Tree branches to around 12 inches in diameter were blown down.
A home on the 1900 block of Durham Drive caught fire after lightning blew a small hole in the roof.
A home on the 1600 block of Balmoral Lane was struck by lightning but did not catch fire.
Tree limbs to around 3 inches in diameter were blown down.
A four inch diameter tree was snapped near St Francis Road & Harlem Avenue. A metal fence was also blown down in Frankfort.
A home on the 15700 block of Peggy Lane was struck by lightning sparking a fire. The building was not occupied because it had been struck by lightning earlier in the year; however, a worker inside the building was shocked and had to be transported to the hospital.
Numerous large trees were blown down in Oregon.
Numerous large trees were blown down and uprooted across Amboy. Some of the trees were several feet in diameter.
A creek was out of its banks. A trained spotter measured 2.2 inches of rain between 16:30 CST and 20:15 CST.
Two semi-trucks were flipped over on I-39 and numerous tree branches were blown down in Mendota.
Multiple trees ranging from 1 to 3 feet in diameter were uprooted along E 11th Road.
An aerial survey from local media showed clear convergent swirling and scarring near Earlville. A short lived tornado touched down embedded within a larger area of straight line wind damage. Numerous trees were blown down with damage to roofs and a garage blown out on the south and southwest portions of town. Maximum winds were estimated to 110 mph.
A home on Schillinger Court caught fire after it was struck by lightning. The home was deemed uninhabitable due to the damage.
A large tree was blown down.
Concentrated damage was found at two farmsteads including the destruction of an outbuilding and large trees snapped at their bases. Maximum winds were estimated to 100 mph.
A storm survey team determined via an aerial survey that a tornado touched down over mainly fields north of Morris. Maximum winds were estimated to 85 mph.
Straight line winds of 80 to 90 mph caused a tremendous amount of tree damage across all of Morris. Numerous utility poles were snapped and power lines were blown down. Numerous roads were blocked. An estimated 90 percent of the city was without power. Structural damage was observed to a warehouse building on the north side of Morris with significant loss of roof covering.
A tornado caused damage to trees and residences between Plainfield and Romeoville. Over 50 trees, including many large softwood trees, were uprooted within a concentrated path. A dozen modest to large trees were blown to the northwest against the eastward path of the storm. Numerous roads were blocked due to fallen trees. There was minor damage to numerous residences in the Woodlands of the Reserve and Lakewood Falls subdivisions. This damage was mainly siding and shingles peeled off along with windows blown out. The tornado crossed I-55 near mile marker 261. The tornado was embedded within a larger area of straight line wind damage. Maximum winds were estimated to 95 mph.
An NWS Storm Survey confirmed scattered straight-line wind damage across Romeoville consistent with 70 to 90 mph winds. Large tree limbs were blown down and an evergreen tree was snapped at its base along Marquette Drive and Enterprise Drive. A large metal street light was broken at its base and leaning on power lines near Romeo Road and Route 53. Multiple trees were blown down west of Route 53 partially blocking Belmont Drive. Power lines were down at Romeo Road and Macon Avenue. A tree was blown down blocking Homer Avenue. Portions of Route 53 were closed due to power lines down across the road north of Normantown Road. Minor roof damage occurred across the area.
A 12 inch diameter tree was split at its base near Ingalls Avenue and Larkin Avenue. Numerous tree limbs up to six inches in diameter were blown down along Larkin Avenue between McDonough Street and Black Road.
Numerous tree limbs up to around 16 inches in diameter were blown down south of Route 113 on Will Road.
A two foot diameter tree was blown down.
Two trees and numerous tree limbs were blown down near Central Avenue and 103rd Street.
Some siding was peeled off of homes.
This tornado started near the intersection of E. 6000N Rd and N. County Highway 51. Roof damage was done to a barn along with numerous trees snapped and uprooted. The tornado ended along County Highway 13. Maximum winds were estimated to be 90 mph.
Several large trees were blown down near Sportsman's Club. Winds were estimated to 70 mph by a trained spotter.
Numerous large trees were blown down.
A tornado touched down near N. 5000E Rd and ended near N 8000E Rd. It snapped a wooden power pole and damaged corn along its path. Maximum winds were estimated to 85 mph.
Numerous trees were blown down.
This tornado began near 10000N Rd and ended near a farmstead along N. 8000E Rd. A large machine shed was heavily damaged, and trees were snapped and uprooted. Maximum winds were estimated to 95 mph.
A tornado started near the intersection of 11000N Rd and N 8000E Rd. A large shed was destroyed with all of its posts and several anchors to the posts pulled from the ground. There was also minor buckling of a house's foundation, numerous trees snapped and uprooted, a snapped wooden power pole, and damage to corn crops. The tornado dissipated near Illinois Highway 1. Maximum winds were estimated to 110 mph.
This tornado began near a farmstead on N. 8000E Rd and would end near the intersection of 9000N Rd and N. 11000E Rd. A barn was destroyed, a 4,000 lb. trailer moved 50 feet, and numerous hardwood trees were snapped and uprooted. Maximum winds were estimated to 105 mph.
A large tree branch and numerous smaller branches were blown down.
This tornado began north of Momence along Illinois Highway 17, crossed the Illinois-Indiana state line and tracked near 241st Ave. in Indiana. The tornado then passed through the far south end of the town of Schneider and ended near the Kankakee River southwest of Shelby. Damage was done to a roof of a barn along with numerous hardwood trees snapped and uprooted. Maximum winds were estimated to 110 mph.
Trees 12 to 18 inches in diameter were blown down onto power lines. Numerous tree branches were blown down.
A large healthy tree limb was blown down.
This tornado that began near the intersection of 11000N Rd and Slaughter House Rd damaged a greenhouse and brought roof damage to a house, along with snapping large tree limbs. The tornado ended near County Highway 13. Maximum winds were estimated to 75 mph.
This strong tornado touched down slightly north of the intersection between E. 10500N Rd and N. 14000E Rd. The tornado torqued a house on its foundation beyond repair and damaged a small church. There were also numerous barns and outbuildings destroyed and severe damage to several large trees. The tornado dissipated near N. 17500E Rd. Maximum winds were estimated to 115 mph.
Large tree limbs were blown down.
A very short-lived tornado tracked near E. 10500N Rd. Damage occurred to both a house and a barn, to a swimming pool, and to trees. Maximum winds were estimated to 75 mph.
This tornado began near Kankakee County Highway 13 in Illinois and crossed into Indiana just south of E. 10500N Rd. A house under construction (but sealed) had an exterior wall of the garage blown out, part of a second story exterior wall blown in, and a portion of roof removed. A barn also had substantial roof damage along with numerous large trees snapped, uprooted, and partially stripped of their branches. The tornado dissipated south of Lowell, Indiana near Colfax St. Maximum winds were estimated to 110 mph.
Multiple large trees were blown down.
This short-lived tornado began just west of the Illinois-Indiana state line and crossed the state line into a grove of trees and ended near Calumet Ave. There were multiple large trees downed with this tornado. Maximum winds were estimated to 90 mph.
The access road to North Lake Shore Drive from North Michigan was closed due to flooding. There was also flooding at North Avenue under Lake Shore Drive.
Two to three feet of standing water was present on southbound I-55 between Central Avenue and County Line Road with only the right lane passable. A COOP observer three miles southwest of Midway Airport measured 2.78 inches of rain.
Southbound I-55 was impassable between County Line Road and Kingery Highway with water at least a foot deep causing motorists to use the shoulder. A trained spotter in Woodridge measured 3.30 inches of rain.
La Grange Road was closed between 47th Street and 49th Street due to water over the roads.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2014Every state in 2014This day in weather historyThe tornado archive for Illinois, 2014Warnings in Illinois, June 2014
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 530764, 530771, 530768, 530774, 530785, 530775, 530776, 530897, 530898, 530777, 530778, 530899, 530787, 530788, 530790, 530791, 530793, 530794, 530795, 530902, 530896, 530806, 530807, 530903, 530904, 959421, 530901, 530808, 530809, 530905, 530810, 530811, 530812, 530813, 530814, 530815, 530816, 530817, 530818, 530825, and more.