Thunderstorms produced gusty winds on the open waters of Northern Lake Huron.
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 APX wrote it up.
Thunderstorms produced gusty winds on the open waters of Northern Lake Huron.
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 Gaylord, MI wrote its last area forecast discussion before the first event at Jul 19, 7:01 PM EST, 1 hour 21 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GAYLORD MI 801 PM EDT MON JUL 19 2010 .SYNOPSIS.../ISSUED AT 349 PM/ A WAVE OF LOW PRESSURE MOVING EAST ALONG A STATIONARY FRONT JUST SOUTH OF THE MICHIGAN BORDER WILL BRING SHOWERS AND THUNDERSTORMS BACK INTO SOUTHERN LOWER MICHIGAN LATE TONIGHT THROUGH TUESDAY. A FEW OF THESE SHOWERS MAY REACH AS FAR NORTH AS THE M-55 CORRIDOR. HIGH PRESSURE WILL BUILD BACK INTO NORTHERN MICHIGAN ON WEDNESDAY. && .SHORT TERM.../ISSUED AT 801 PM/...TONIGHT FORECAST UPDATED TO ADD POPS TO MOST OF NORTHERN MI TONIGHT. WV IMAGERY INDICATES THAT THE UPSTREAM WAVE IS NOT AS WEAK AS EXPECTED...WITH A WELL-DEFINED /LEAF/ OF DEEP MOISTURE ADVANCING THRU THE CENTRAL LAKES REGION. CONVECTION CONTINUES TO GRADUALLY INCREASE ALONG ITS TRAILING EDGE...ESPECIALLY IN NE WI. IN ADDITION...MODERATE TO TOWERING CUMULUS ARE EVIDENT JUST OUTSIDE MY WINDOW. HAVE INTRODUCED SCT SHRA HAS A FIRST STEP. PWATS ARE INCREASING TO NEAR 1.5 INCHES IN THIS MOIST PLUME...AND THE SHORTWAVE (AND TRAILING COOLER TEMPS ALOFT) WILL CONTINUE TO AID CONVECTION. AM STRONGLY SUSPECTING THAT POPS WILL NEED TO BE BUMPED UP FURTHER (PERHAPS LOCALLY HEAVY?)...ESPECIALLY IN THE SOUTH HALF OF THE FORECAST AREA. THUNDER MAY ALSO NEED TO BE INTRODUCED. WILL WATCH THINGS FOR ANOTHER HOUR OR TWO BEFORE TAKING THOSE STEPS. JZ && .LONG TERM.../ISSUED AT 349 PM/...TUESDAY AND BEYOND TUESDAY...MUCH OF THE CWA WILL HAVE POTENTIAL FOR CONVECTION AT VARYING TIMES DURING THE DAY. A CENTRAL PLAINS STORM SYSTEM WILL LIFT A WARM FRONT INTO THE OHIO VALLEY DURING THE MORNING...BEFORE LIFTING INTO SRN MI DURING THE DAY. 850/700MB QVECTORS SHOW CONVERGENCE INCREASING OVER THE NRN LAKES DURING THE MORNING...IN RESPONSE TO THE SYSTEM MOVING INTO THE OHIO VALLEY. ADDITIONAL LIFT WILL BE SUPPLIED AT UPPER LEVELS BY WEAK LEFT EXIT REGION FORCING...OF A 110KT 300MB JET SWEEPING OVER THE STATE. ADDITIONAL LIFT WILL BE FROM POSSIBLE LAKE BREEZE DURING THE AFTERNOON. SFC DEW PTS WILL REMAIN AROUND THE LOW 60S...WHILE 850MB DEW PTS INCREASE TO AROUND 12C SOUTH OF THE STRAITS. MID LVL LAPSE RATES WILL BE AROUND 6 C/KM AS 500MB TEMPS DROP A TAD TO -15C WHILE 850MB WARM A LITTLE TO 14C. MODEL SOUNDINGS SHOWING CAPE VALUES NEAR 800 J/KG OVER THE NRN CWA...INCREASING TO AROUND 1200 J/KG OVER THE SRN CWA. OVERALL WILL MENTION A CHANCE OF SHOWERS AND THUNDERSTORMS OVER MUCH OF THE CWA. WILL MENTION AFTERNOON HIGHS A FEW DEGREES EITHER SIDE OF 80...AS A RESULT OF MIXED SUN AND CLOUDS AND ANY PCPN DEVELOPMENT. PCPN CHANCES DIMINISH GREATLY TUESDAY NIGHT AS UPPER FLOW GOES ZONAL...AND THE OHIO VALLEY SYSTEM WEAKENS AND LAKE BREEZE CONVERGENCE DIMINISHES. WEDNESDAY AND THURSDAY...WEAK HIGH PRESSURE BEGINS TO REBUILD OVER THE STATE WEDNESDAY...BEFORE STRENGTHENING OVER THE GREAT LAKES THURSDAY. AT UPPER LEVELS...NEARLY ZONAL 500MB FLOW WILL BE REPLACED BY UPPER RIDGING AS A 500MB TROUGH DIGS OVER THE PACIFIC COAST. OVERALL WILL KEEP THE FORECAST AREA DRY THROUGH THURSDAY EVENING... DUE TO SFC AND UPPER LEVEL SUBSIDENCE AND MODEL SOUNDINGS SHOWING 850MB DEW PTS DRYING TO AROUND 7C. WILL HOWEVER INCREASE CHANCE OF PCPN OVER THE CWA THURSDAY NIGHT...AS 850MB DEW PTS INCREASE TO 16C WHILE A PLAINS STORM SYSTEM LIFTS INTO THE UPPER MIDWEST. WILL KEEP AFTERNOON HIGHS IN THE 80S...WITH GOOD MIXING THROUGH 850MB WHERE TEMPS ARE AROUND 13C/14C. FRIDAY THROUGH MONDAY...FAIRLY ACTIVE PERIOD DEVELOPING OVER THE NRN LAKES FOR THE FIRST HALF OF THE WEEKEND...AS A PLAINS STORM SYSTEM LIFTS NORTH INTO LOWER MICHIGAN. MODELS DO DIFFER WITH EXACT PATH OF THE STORM OVER THE REGION...BEFORE THE SYSTEM EXITS EAST SATURDAY. ADDITIONAL SYNOPTIC SUPPORT WILL BE FROM STEEPENING 500MB TROUGH MOVING OVER THE NRN PLAINS AND SWEEPING QUICKLY OVER THE GREAT LAKES SATURDAY...BEFORE EXITING EAST OF THE REGION SUNDAY. SFC AND UPPER RIDGING MOVING OVER THE CENTRAL US AND CANADA...WILL BUILD OVER THE GREAT LAKES SUNDAY AND MONDAY. OVERALL WILL MENTION A CHANCE OF PCPN FRIDAY AND SATURDAY BUT CONTINUE WITH DRY AND MILD SUNDAY AND MONDAY. HIGH TEMPS GENERALLY IN THE 80S THROUGH THE PERIOD...COOLEST SATURDAY WITH 850MB TEMPS DROPPING BEHIND EASTWARD EXITING SFC AND UPPER LEVEL FEATURES. SWR && .MARINE.../ISSUED AT 349 PM/ WINDS AND WAVES EXPECTED TO REMAIN BELOW SCA CRITERIA THRU THE PERIOD...AS WEAK HIGH PRESSURE AFFECTS THE NRN LAKES WHILE A STORM SYSTEM LIFTS SLOWLY INTO THE OHIO VALLEY. RAIN SHOWERS AND SCATTERED THUNDERSTORMS WILL INCREASE OVER THE NRN LAKES NEARSHORE WATERS TUESDAY...BEFORE DIMINISHING TUESDAY NIGHT IN RESPONSE TO THE OHIO VALLEY STORM SYSTEM. DRY WEDNESDAY AS HIGH PRESSURE BUILDS BACK INTO THE NRN LAKES. SWR && .AVIATION.../ISSUED AT 723 PM/...VALID FOR 00Z TAFS VFR. HIGH CLOUDS HAVE OVERSPREAD THE REGION...AHEAD OF SOME SHRA/TSRA IN WI AND CENTRAL UPPER MI. PRECIP IS NOT EXPECTED TO GET THIS FAR EAST TONIGHT...BUT CIGS WILL GRADUALLY LOWER. BETTER CHANCE OF SHRA GETTING GOING TOMORROW (ESPECIALLY IN THE AFTERNOON)...AND VCSH HAS BEEN ADDED TO APN/TVC. PREVAILING CIGS WILL BE IN THE 4K-5K FT RANGE. JZ && .APX WATCHES/WARNINGS/ADVISORIES... MI...NONE. LM...NONE. LH...NONE. LS...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GAYLORD MI 358 PM EDT MON JUL 19 2010 LHZ345>349-LMZ323-341-342-344>346-LSZ321-322-MIZ008-015>036-041-042- 201200- STRAITS OF MACKINAC-ST IGNACE TO FALSE DETOUR CHANNEL- MACKINAC BRDG TO PRESQUE ISLE LT-PRESQUE ISLE LT TO STURGEON PT- STURGEON PT TO ALABASTER-GRAND TRAVERSE BAY- SEUL CHOIX PT TO MACKINAC BRDG-NORWOOD TO MACKINAC BRDG- SLEEPING BEAR PT TO GRAND TRAVERSE LT-PT BETSIE TO SLEEPING BEAR PT- MANISTEE TO PT BETSIE-WHITEFISH BAY-ST. MARYS RIVER-CHIPPEWA- MACKINAC-EMMET-CHEBOYGAN-PRESQUE ISLE-CHARLEVOIX-LEELANAU-ANTRIM- OTSEGO-MONTMORENCY-ALPENA-BENZIE-GRAND TRAVERSE-KALKASKA-CRAWFORD- OSCODA-ALCONA-MANISTEE-WEXFORD-MISSAUKEE-ROSCOMMON-OGEMAW-IOSCO- GLADWIN-ARENAC- 358 PM EDT MON JUL 19 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN LOWER MICHIGAN... EASTERN UPPER MICHIGAN...AND ADJACENT NEARSHORE WATERS OF LAKE MICHIGAN...LAKE HURON AND LAKE SUPERIOR. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ISOLATED THUNDERSTORMS ARE EXPECTED TUESDAY AND TUESDAY EVENING ACROSS ALL OF NORTHERN MICHIGAN. SEVERE WEATHER IS NOT ANTICIPATED. THUNDERSTORMS ARE AGAIN POSSIBLE ACROSS ALL OF NORTHERN MICHIGAN THURSDAY NIGHT THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. MSB
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GAYLORD MI
424 PM EDT MON JUL 19 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0656 PM TORNADO 3 S CADILLAC 44.20N 85.41W
07/18/2010 WEXFORD MI NWS STORM SURVEY
A NATIONAL WEATHER SERVICE STORM SURVEY CONFIRMED A WEAK
EF0 TORNADO ABOUT 3 MILES SOUTH OF CADILLAC. THE TORNADO
TOUCHED DOWN AT 656 PM...TEARING THE ROOF OFF AN OUT
BUILDING AT A LUMBER YARD. THE TORNADO WAS ONLY ON THE
GROUND BRIEFLY, LIFTING BY 658 PM. THE TOTAL PATH LENGTH
WAS ESTIMATED AT 100 YARDS, WITH MAXIMUM WINDS OF 65 MPH.
&&
JKEYSORPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GAYLORD MI
627 PM EDT MON JUL 19 2010
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0732 PM TSTM WND GST 2 ENE PRUDENVILLE 44.30N 84.64W
07/18/2010 E65 MPH ROSCOMMON MI NWS STORM SURVEY
*** 1 INJ *** 2 FOOT DIAMETER TREE FELL ON HOUSE. MAN
INJURED FROM FALLING GLASS ON PORCH.
&&
EVENT NUMBER APX1000260
ARNOTTPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GAYLORD MI
640 PM EDT MON JUL 19 2010
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0717 PM TSTM WND DMG 5 N HOUGHTON LAKE 44.37N 84.76W
07/18/2010 ROSCOMMON MI TRAINED SPOTTER
NUMEROUS TREES DOWN AT THE NORTHERN END OF HOUGHTON
LAKE. TIME ESTIMATED BY RADAR.
&&
CORRECTED LOCATION
EVENT NUMBER APX1000258
ARNOTTPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GAYLORD MI
647 PM EDT MON JUL 19 2010
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0732 PM TSTM WND DMG 2 ENE PRUDENVILLE 44.30N 84.64W
07/18/2010 E65 MPH ROSCOMMON MI NWS STORM SURVEY
*** 1 INJ *** 2 FOOT DIAMETER TREE FELL ON HOUSE. MAN
INJURED FROM FALLING GLASS ON PORCH.
&&
CORRECTED EVENT
EVENT NUMBER APX1000260
ARNOTTPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GAYLORD MI
657 PM EDT MON JUL 19 2010
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0730 PM TSTM WND DMG 5 NNW PRUDENVILLE 44.37N 84.71W
07/18/2010 ROSCOMMON MI NWS STORM SURVEY
ONE TREE DOWN. OTHER TREES DAMAGED BUT NOT DOWNED. TIME
ESTIMATED FROM RADAR.
&&
EVENT NUMBER APX1000264
ARNOTTPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GAYLORD MI
722 PM EDT MON JUL 19 2010
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0650 PM HAIL 2 SE CADILLAC 44.23N 85.39W
07/18/2010 E0.75 INCH WEXFORD MI BROADCAST MEDIA
RELAY FROM 9 & 10 NEWS
0656 PM TORNADO 3 S CADILLAC 44.20N 85.41W
07/18/2010 WEXFORD MI NWS STORM SURVEY
A NATIONAL WEATHER SERVICE STORM SURVEY CONFIRMED A
WEAK EF0 TORNADO ABOUT 3 MILES SOUTH OF CADILLAC. THE
TORNADO TOUCHED DOWN AT 656 PM...TEARING THE ROOF OFF AN
OUT BUILDING AT A LUMBER YARD. THE TORNADO WAS ONLY ON
THE GROUND BRIEFLY...LIFTING BY 658 PM. THE TOTAL PATH
LENGTH WAS ESTIMATED AT 100 YARDS...WITH MAXIMUM WINDS
OF 65 MPH.
0708 PM WALL CLOUD 5 SSE CADILLAC 44.18N 85.38W
07/18/2010 WEXFORD MI TRAINED SPOTTER
0717 PM TSTM WND DMG 5 N HOUGHTON LAKE 44.37N 84.76W
07/18/2010 ROSCOMMON MI TRAINED SPOTTER
NUMEROUS TREES DOWN AT THE NORTHERN END OF HOUGHTON
LAKE. TIME ESTIMATED BY RADAR.
0725 PM FUNNEL CLOUD 5 N HOUGHTON LAKE 44.37N 84.76W
07/18/2010 ROSCOMMON MI TRAINED SPOTTER
0730 PM TSTM WND DMG 5 NNW PRUDENVILLE 44.37N 84.71W
07/18/2010 ROSCOMMON MI NWS STORM SURVEY
ONE TREE DOWN. OTHER TREES DAMAGED BUT NOT DOWNED. TIME
ESTIMATED FROM RADAR.
0732 PM TSTM WND GST 2 ENE PRUDENVILLE 44.30N 84.64W
07/18/2010 E65 MPH ROSCOMMON MI NWS STORM SURVEY
*** 1 INJ *** 2 FOOT DIAMETER TREE FELL ON HOUSE. MAN
INJURED FROM FALLING GLASS ON PORCH.
&&
EVENT NUMBER APX1000253 APX1000265 APX1000254 APX1000258 APX1000257
APX1000264 APX1000260
JARNOTTThe NCL Michigan radar (KAPX), 195 km away, was scanning. The volume nearest the first event began at 01:21 UTC.
1 marine thunderstorm wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Huron in 2010Every state in 2010This day in weather history
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: 253152.