A complex of thunderstorms moved along a frontal boundary across Lake Michigan and into far southern Lower Michigan. Some damage occurred in the Niles area before the storms weakened further.
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 IWX wrote it up.
A complex of thunderstorms moved along a frontal boundary across Lake Michigan and into far southern Lower Michigan. Some damage occurred in the Niles area before the storms weakened further.
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 Northern Indiana wrote its last area forecast discussion before the first event at Jul 24, 5:34 AM EST, 2 hours 26 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
634 AM EDT SAT JUL 24 2010
.AVIATION...
SHOWERS AND THUNDERSTORMS CONTINUING TO FORM NORTH OF COMPOSITE
OUTFLOW BOUNDARY OVER NRN IL/IN AND SHOULD IMPACT THE
TERMINALS...ESPECIALLY SBN THIS MORNING. EXPECT BOUNDARY WILL MIX
OUT THIS AFTN WITH RENEWED TSTM ACTIVITY AHEAD OF APCHG CDFNT
LATER THIS AFTN AND THIS EVE. CDFNT SHOULD MOVE THROUGH THE AREA
06Z-12Z LIKELY ACCOMPANIED BY SOME MVFR CONDITIONS.
&&
.PREV DISCUSSION... /ISSUED 423 AM EDT SAT JUL 24 2010/
SHORT TERM...
STRONG SHRTWV MOVG THROUGH THE NRN PLAINS THIS MORNING HAS RESULTED
IN A COUPLE OF LARGE AREAS OF CONVECTION. ONE EXTENDING FROM NE IA
TO NRN INDIANA WAS OCRG IN THE WAA ZONE OVER A COOLED BOUNDARY LAYER
FROM CONVECTION EARLIER THIS EVE. SECOND MCS WAS MOVG EAST AHEAD OF
THE SYSTEM'S CDFNT OVER MN AND WRN IA. MODELS SUGGEST THE WNW-ESE
ORIENTED BAND OF TSTMS WILL LIFT NE THIS MORNING AS WAA AHEAD OF THE
SHRTWV CONTS. THIS PRBLY WILL OCCUR A LITTLE SLOWER THAN PROGGED AS
SOME BACKBUILDING OCRG...SO INCREASED POPS TO LIKELY ACROSS NRN
PORTION OF CWA THROUGH THIS MORNING AND ADDED MENTION OF HEAVY
RAINFALL. AFTER DIURNAL WKNG TO THE CONVECTION THIS MORNING
RENEWED DEVELOPMENT THIS AFTN/EVE IS EXPECTED GIVEN DECENT FORCING
ASSOCIATED WITH THE UPR TROF AND OVERALL UNSTABLE AIRMASS IN
PLACE. FOR NOW GIVEN THE QUESTION OF RECOVERY FROM MORNING
CONVECTION...LEFT POPS IN CHC RANGE FOR THIS AFTN/EVE WITH RAIN
CHANCES ENDING FROM NW-SE ACROSS THE AREA LATE TONIGHT AND EARLY
SUNDAY AS THE CDFNT MOVES THROUGH. IF AIRMASS RECOVERY FROM
MORNING CONVECTION/CLOUDS IS STRONG... MAY NEED TO INCREASE THE
POPS AGAIN FOR THIS AFTN/EVE SIMILAR TO YDAY. GIVEN VERY MOIST
AIRMASS IN PLACE, MENTIONED POSSIBILITY OF HEAVY RAINFALL THROUGH
FROPA. DEEP LAYER SHEAR ALSO IMPRESSIVE AT 30-40KT...SO SVR STORMS
AGAIN PSBL THIS AFTN/EVE WITH GREATEST THREAT FROM WIND DAMAGE
ASSOCIATED WITH LINE/BOWING SEGMENTS.
COOLER AND DRIER AIR WILL FILTER INTO THE AREA BEHIND THE
CDFNT SAT NGT AND SUNDAY PROVIDING FAIR WX. AS FOR TEMPS...SGFNT
DIFFERENCES IN MOS GUIDANCE FOR TODAY. NAM/MET SEEMS TO PICK UP ON
CONVECTIVE COOLING THIS MORNING HOLDING TEMPS DOWN SOME TODAY.
CURRENT FCST REFLECTS THIS AS WELL AND ONLY MADE MINOR DOWNWARD
ADJUSTMENTS ACROSS THE NE. THE HOT TEMPS COMBINED WITH DWPTS IN
THE L-M70S WILL RESULT IN HEAT INDICES AROUND 100 OVER MOST OF THE
CWA...THUS HEAT ADVISORY ISSUED FOR MOST OF NRN INDIANA AND NW
OHIO. TEMPS WILL LOWER BACK DOWN TO AOB NORMAL BY SUN/SUN NGT AS
COOL HIGH PRESSURE MOVES INTO THE GRTLKS.
LONG TERM...
MONDAY THROUGH FRIDAY.
ONLY COSMETIC CHANGES TO LONG TERM GRIDS AS THEY ARE IN DECENT SHAPE
PLUS MONITORING OF CONVECTION.
HIGH PRESSURE WILL REMAIN IN CONTROL FOR THE FIRST FEW DAYS OF THE
LONG TERM WITH SLOWLY INCREASING TEMPERATURES AND HUMIDITY. ACTIVE
PATTERN LOOKS TO ARRIVE ONCE AGAIN AS THE STRUGGLE BETWEEN THE
STRONG SOUTHERN RIDGE AND ACTIVE NORTHERN STREAM RAGES ON. EXACT
TIMING AND LOCATION OF SHOWERS AND STORMS THROUGH THE SECOND HALF OF
THE PERIOD DIFFICULT TO DETERMINE WITHIN 24 HOURS LET ALONE SEVERAL
DAYS OUT. COLD FRONT DOES LOOK TO DROP IN LATE WEDS INTO THURS WHICH
MAY BRING THE NEXT CHANCE FOR RAINFALL. GRIDS HAVE CHC POPS IN TUES
NGT THROUGH FRIDAY AND GIVEN PATTERN OF LATE...SEE NO REASON TO
DEVIATE.
TEMPERATURES WILL BE TRICKY MID TO END OF THE WEEK AS CONVECTIVE
SYSTEMS...DEBRIS AND FRONTAL LOCATION WILL ALL DICTATE AFTERNOON
HIGHS. WEDS LOOKS TO BE DAY WITH GREATEST POTENTIAL FOR TEMPS BACK
TOWARDS 90.
&&
.IWX WATCHES/WARNINGS/ADVISORIES...
IN...HEAT ADVISORY FROM 2 PM EDT /1 PM CDT/ THIS AFTERNOON TO 8 PM
EDT /7 PM CDT/ THIS EVENING FOR INZ003>005-008-009-012>018-
020-022>027-032>034.
FLASH FLOOD WATCH UNTIL 2 PM EDT /1 PM CDT/ THIS AFTERNOON FOR
INZ003>007.
MI...FLASH FLOOD WATCH UNTIL 2 PM EDT THIS AFTERNOON FOR MIZ077>081.
OH...HEAT ADVISORY FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING
FOR OHZ001-002-004-005-015-016-024-025.
FLASH FLOOD WATCH UNTIL 2 PM EDT THIS AFTERNOON FOR OHZ001-002.
LM...NONE.
&&
SHORT TERM...JT
LONG TERM...FISHER
AVIATION...JTHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORTHERN INDIANA 431 AM EDT SAT JUL 24 2010 INZ006-007-MIZ077>081-250845- LAGRANGE-STEUBEN-BERRIEN-CASS MI-ST. JOSEPH MI-BRANCH-HILLSDALE- INCLUDING THE CITIES OF...LAGRANGE...TOPEKA...ANGOLA...NILES... BENTON HARBOR...ST. JOSEPH...BUCHANAN...DOWAGIAC...CASSOPOLIS... STURGIS...THREE RIVERS...COLDWATER...HILLSDALE 431 AM EDT SAT JUL 24 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN AND NORTHERN INDIANA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL BE POSSIBLE THROUGH TONIGHT AHEAD OF A COLD FRONT. SOME STORMS MAY BE SEVERE WITH DAMAGING WINDS THE MAIN THREAT. IN ADDITION...LOCALLY HEAVY RAINFALL MAY OCCUR WITH RAINFALL RATES OF 1 TO 2 INCHES PER HOUR POSSIBLE. AFTERNOON HIGHS IN THE UPPER 80S WILL COMBINE WITH HIGH HUMIDITY WILL PRODUCE HEAT INDICES IN THE 96 TO 99 DEGREE RANGE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE CHANCE FOR THUNDERSTORMS WILL RETURN TUESDAY NIGHT INTO FRIDAY. IT REMAINS TOO EARLY TO DETERMINE A THREAT FOR SEVERE WEATHER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THROUGH THIS EVENING. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX INZ003>005-008-009-012>018-020-022>027-032>034-OHZ001-002-004-005- 015-016-024-025-250845- LA PORTE-ST. JOSEPH IN-ELKHART-NOBLE-DE KALB-STARKE-PULASKI-MARSHALL- FULTON IN-KOSCIUSKO-WHITLEY-ALLEN IN-WHITE-CASS IN-MIAMI-WABASH- HUNTINGTON-WELLS-ADAMS-GRANT-BLACKFORD-JAY-WILLIAMS-FULTON OH- DEFIANCE-HENRY-PAULDING-PUTNAM-VAN WERT-ALLEN OH- INCLUDING THE CITIES OF...MICHIGAN CITY...LA PORTE...SOUTH BEND... MISHAWAKA...ELKHART...GOSHEN...KENDALLVILLE...LIGONIER...AUBURN... GARRETT...KNOX...NORTH JUDSON...WINAMAC...FRANCESVILLE...PLYMOUTH... BREMEN...ROCHESTER...WARSAW...WINONA LAKE...COLUMBIA CITY... SOUTH WHITLEY...FORT WAYNE...MONTICELLO...BROOKSTON...LOGANSPORT... PERU...WABASH...NORTH MANCHESTER...HUNTINGTON...BLUFFTON...OSSIAN... DECATUR...BERNE...MARION...HARTFORD CITY...MONTPELIER...PORTLAND... BRYAN...WAUSEON...ARCHBOLD...DEFIANCE...NAPOLEON...PAULDING... ANTWERP...OTTAWA...PANDORA...VAN WERT...DELPHOS...LIMA 431 AM EDT SAT JUL 24 2010 /331 AM CDT SAT JUL 24 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OHIO AND NORTHERN INDIANA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL BE POSSIBLE THROUGH TONIGHT AHEAD OF A COLD FRONT. SOME STORMS MAY BE SEVERE WITH DAMAGING WINDS THE MAIN THREAT. IN ADDITION...LOCALLY HEAVY RAINFALL MAY OCCUR WITH RAINFALL RATES OF 1 TO 2 INCHES PER HOUR POSSIBLE. AFTERNOON HIGHS FROM 90 TO 93 WILL COMBINE WITH HIGH HUMIDITY WILL PRODUCE HEAT INDICES IN THE 98 TO 102 DEGREE RANGE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE CHANCE FOR THUNDERSTORMS WILL RETURN TUESDAY NIGHT INTO FRIDAY. IT REMAINS TOO EARLY TO DETERMINE A THREAT FOR SEVERE WEATHER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THROUGH THIS EVENING. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX LMZ043-046-250845- NEW BUFFALO MI TO ST JOSEPH MI-MICHIGAN CITY IN TO NEW BUFFALO MI- 431 AM EDT SAT JUL 24 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF SOUTHEASTERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE THROUGH TONIGHT. WIND GUSTS TO 40 KNOTS AND LOCALLY HIGHER WAVES WILL BE POSSIBLE WITH ANY STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE WILL BE A MODERATE RISK FOR RIP CURRENTS ALONG THE SOUTHEASTERN SHORELINE OF LAKE MICHIGAN SUNDAY. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX/?N=MARINE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
548 AM EDT SAT JUL 24 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0449 AM FLOOD SOUTH BEND 41.68N 86.25W
07/24/2010 ST. JOSEPH IN LAW ENFORCEMENT
FEW INTERSECTIONS AND VIADUCTS CLOSED DUE TO HIGH WATER
IN SOUTH BEND. GENERAL URBAN FLOODING.
&&
EVENT NUMBER IWX1000958
FISHERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
708 AM EDT SAT JUL 24 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0620 AM HEAVY RAIN E NILES 41.83N 86.25W
07/24/2010 M2.70 INCH BERRIEN MI TRAINED SPOTTER
2.70 INCHES OF RAINFALL SINCE 810 PM YESTERDAY
&&
EVENT NUMBER IWX1000959
NGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
746 AM EDT SAT JUL 24 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 AM HEAVY RAIN 1 WNW ROSELAND 41.72N 86.27W
07/24/2010 M3.03 INCH ST. JOSEPH IN CO-OP OBSERVER
24 HOUR TOTAL
&&
EVENT NUMBER IWX1000960
NGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
801 AM EDT SAT JUL 24 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM HEAVY RAIN MICHIGAN CITY 41.71N 86.90W
07/24/2010 M5.56 INCH LAPORTE IN TRAINED SPOTTER
NEARBY FIELDS ARE FLOODED
&&
EVENT NUMBER IWX1000961
NGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
824 AM EDT SAT JUL 24 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 AM HEAVY RAIN 4 NW SOUTH BEND 41.72N 86.30W
07/24/2010 M2.87 INCH ST. JOSEPH IN ASOS
24 HOUR TOTAL FROM KSBN ASOS
&&
EVENT NUMBER IWX1000962
NGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
849 AM EDT SAT JUL 24 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 AM HEAVY RAIN 4 WSW BERTRAND 41.76N 86.33W
07/24/2010 M4.10 INCH ST. JOSEPH IN TRAINED SPOTTER
24 HOUR TOTAL
&&
EVENT NUMBER IWX1000963
NGThe Northern Indiana radar (KIWX), 70 km away, was scanning. The volume nearest the first event began at 13:01 UTC.
1 thunderstorm wind. Local standard time, as filed.
Law enforcement officials reported large tree limbs down as well as a few trees in the Niles and Bertrand area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2010Every state in 2010This day in weather historyWarnings in Michigan, July 2010
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: 253865.