A thunderstorm developed during the afternoon and caused damaging winds near the Iron Range.
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 DLH wrote it up.
A thunderstorm developed during the afternoon and caused damaging winds near the Iron Range.
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 Duluth, MN wrote its last area forecast discussion before the first event at Aug 8, 3:03 PM CST, 22 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 403 PM CDT SAT AUG 8 2015 .SHORT TERM...(THIS EVENING THROUGH SUNDAY) ISSUED AT 402 PM CDT SAT AUG 8 2015 ANOTHER STORMY DAY ACROSS THE NORTHLAND AHEAD OF A COLD FRONT. SCATTERED THUNDERSTORMS ARE EXPECTED TO MOVE ACROSS NORTHEAST MINNESOTA THIS AFTERNOON...INTO WESTERN LAKE SUPERIOR...AND NORTHWEST WISCONSIN THIS EVENING. SOME STRONG TO SEVERE STORMS WILL BE POSSIBLE...BUT LACK OF A STRONG CAP MAY PREVENT WIDESPREAD SEVERE WEATHER. HOWEVER...DEEP LAYER SHEAR OF 35 TO 45 KTS AND MUCAPE OVER 2000 J/KG WILL PRODUCE STORMS CAPABLE OF LARGE HAIL. COLD FRONT MOVES THROUGH TONIGHT LEADING TO SOME CLEARING SKIES IN FAR NORTHERN MINNESOTA...THOUGH FOG DEVELOPMENT IS AGAIN EXPECTED OVERNIGHT ESPECIALLY WHERE HEAVY RAIN FALLS TODAY. SHOWER/STORMS POSSIBLE AGAIN SUNDAY SOUTHERN EDGE OF THE CWA IN VICINITY OF THE FRONT...MAINLY IN NORTHWEST WISCONSIN...BUT ELSEWHERE CLEARING SKIES WITH A LIGHT NORTHWEST WIND AND TEMPERATURES SEASONABLE TO SLIGHTLY ABOVE NORMAL. APOLOGIES FOR THE ABBREVIATED DISCUSSION DUE TO ONGOING SEVERE WEATHER. .LONG TERM...(SUNDAY NIGHT THROUGH SATURDAY) ISSUED AT 402 PM CDT SAT AUG 8 2015 A TRAILING COLD FRONT ACROSS CENTRAL MN AND NRN WI WILL ALLOW A FEW SHOWERS AND WEAK STORMS TO LINGER ACROSS THE SRN AND SERN PORTIONS OF THE NORTHLAND SUNDAY NIGHT AND MONDAY MORNING. HIGH PRESSURE WILL BEGIN TO BUILD IN FROM THE NW EARLY MONDAY PRIOR TO THE PASSAGE OF AN UPPER S/W OVER WRN ONTARIO...FAR NERN MN AND WRN LAKE SUPERIOR. AS THIS WAVE BRUSHES THE ARROWHEAD MON AFTERNOON THE COOL AIR ALOFT ASSOCIATED WITH THE LOW...850MB TEMPS AROUND 7-8 DEG C...WILL COMBINE WITH WARM SFC TEMPERATURES TO STEEPEN LAPSE RATES AND TRIGGER A FEW CONVECTIVE SHOWERS AND WEAK T-STORMS. THE BEST CHANCE WILL BE THROUGH THE ARROWHEAD DURING THE LATE AFTERNOON...WITH CONDITIONS IMPROVING IN THE EVENING AS THE DAYTIME HEATING IS LOST AND HIGH PRESSURE BEGINS TO BUILD IN FROM THE WEST. HIGH PRESSURE WILL DOMINATE THE REGION THROUGH LATE WEDNESDAY WITH DRY CONDITIONS AND WARMING TEMPERATURES EXPECTED. THE NEXT SYSTEM WILL ARRIVE FROM THE NW ON THURSDAY WITH ANOTHER ROUND OF SHOWERS AND STORMS EXPECTED. TEMPERATURES WILL REMAIN ON THE MILD TO WARM SIDE WITH A SLIGHT WARMING TREND EXPECTED THROUGH THE WEEK. HIGHS WILL BEGIN TO PUSH BACK INTO THE 80S WITH OVERNIGHT LOWS IN THE 50S AND 60S. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SUNDAY AFTERNOON) ISSUED AT 1224 PM CDT SAT AUG 8 2015 VFR CONDITIONS THIS AFTERNOON WITH SCATTERED RAIN SHOWERS AND THUNDERSTORMS DEVELOPING AROUND 20-22Z AND PERSISTING INTO THE EARLY EVENING. MAY LINGER LONGER ACROSS NW WI. WILL LIKELY SEE AREAS OF FOG...LOCALLY DENSE AT TIMES...ACROSS MUCH OF THE REGION LATE TONIGHT AND SUN MORNING. CEILINGS WILL DROP BELOW 1000 FT AND VSBYS WILL FALL TO AROUND 1/2SM OR LESS. && .PRELIMINARY POINT TEMPS/POPS... DLH 61 79 58 75 / 50 20 20 10 INL 56 75 52 75 / 10 0 0 20 BRD 61 80 57 79 / 50 20 20 10 HYR 61 81 56 75 / 30 30 30 10 ASX 62 79 56 74 / 40 30 20 10 && .DLH WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. LS...NONE. && SHORT TERM...JJM LONG TERM...TENTINGER AVIATION...TENTINGER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 417 PM CDT SAT AUG 8 2015 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-091030- KOOCHICHING-NORTHERN ST. LOUIS-NORTHERN COOK/NORTHERN LAKE- NORTHERN ITASCA-CENTRAL ST. LOUIS-SOUTHERN LAKE/LAKESHORE- SOUTHERN COOK/LAKESHORE-NORTHERN CASS-SOUTHERN ITASCA- SOUTHERN CASS-CROW WING-NORTHERN AITKIN-SOUTHERN AITKIN- CARLTON/SOUTHERN ST. LOUIS-PINE-DOUGLAS-BAYFIELD-ASHLAND-IRON- BURNETT-WASHBURN-SAWYER-PRICE- 417 PM CDT SAT AUG 8 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MINNESOTA AND NORTHWEST WISCONSIN. .DAY ONE...TONIGHT STRONG TO SEVERE STORMS WILL CONTINUE OVER PORTIONS OF NORTHEAST MINNESOTA THIS AFTERNOON INTO THE EVENING. FAR NORTHWEST WISCONSIN MAY ALSO SEE A SEVERE STORM OR TWO THIS EVENING. THE MAIN THREATS FROM THE STRONGEST STORMS WILL BE LARGE HAIL...DAMAGING WIND AND HEAVY RAIN. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS SLIGHT CHANCE OF THUNDERSTORMS MAINLY SOUTH OF HIGHWAY 2 ON SUNDAY AND MONDAY...AND THEN ACROSS MUCH OF THE AREA ON THURSDAY AND FRIDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTERS HAVE BEEN ACTIVATED OVER PORTIONS OF THE NORTHLAND WITH ADDITIONAL ACTIVATION POSSIBLE THIS EVENING. LSZ121-140>148-091030- BAYFIELD TO OAK POINT WI-GRAND PORTAGE TO GRAND MARAIS MN- GRAND MARAIS TO TACONITE HARBOR MN- TACONITE HARBOR TO SILVER BAY HARBOR MN- SILVER BAY HARBOR TO TWO HARBORS MN-TWO HARBORS TO DULUTH MN- DULUTH MN TO PORT WING WI-PORT WING TO SAND ISLAND WI- SAND ISLAND TO BAYFIELD WI-OAK POINT TO SAXON HARBOR WI- 417 PM CDT SAT AUG 8 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NEARSHORE WATERS OF WESTERN LAKE SUPERIOR. .DAY ONE...TONIGHT THUNDERSTORMS WILL BE POSSIBLE OVER THE NEARSHORE WATERS LATE THIS AFTERNOON INTO THE EVENING. A SEVERE STORM IS POSSIBLE OVER THE FAR WESTERN AREAS. THE MAIN THREATS WILL BE LARGE HAIL AND DAMAGING WIND. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS SLIGHT CHANCE OF THUNDERSTORMS OVER WESTERN LAKE SUPERIOR ON SUNDAY AND MONDAY...AND THEN AGAIN ON THURSDAY AND FRIDAY. MELDE MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB ADDRESS: HTTP://WWW.WEATHER.GOV/DULUTH (ALL LOWER CASE)
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 1029 AM CDT SAT AUG 8 2015 MNZ018-026-081545- NORTH ITASCA-SOUTH ITASCA- 1029 AM CDT SAT AUG 8 2015 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL ITASCA COUNTY... AT 1029 AM CDT...A STRONG THUNDERSTORM WAS NEAR TACONITE...OR 7 MILES NORTHWEST OF HILL ANNEX MINE STATE PARK...MOVING EAST AT 25 MPH. WIND GUSTS UP TO 35 MPH...DIME SIZE HAIL...HEAVY DOWNPOURS...AND OCCASIONAL CLOUD TO GROUND LIGHTNING CAN BE EXPECTED WITH THIS STORM. THIS STORM WILL BE NEAR... KEEWATIN AND NASHWAUK AROUND 1045 AM CDT. OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE LAWRENCE LAKE AND BUCK LAKE. SEEK SHELTER INSIDE A STURDY BUILDING AND AWAY FROM WINDOWS UNTIL THIS STORM PASSES. IF YOU ARE ON OR NEAR ONE OF THE MANY AREA LAKES...GET OFF OF THE WATER IMMEDIATELY AND SEEK SHELTER ON SHORE INSIDE A STURDY BUILDING. LAT...LON 4734 9347 4749 9349 4757 9307 4735 9307 TIME...MOT...LOC 1529Z 262DEG 23KT 4741 9337 MOORE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
155 PM CDT SAT AUG 08 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0153 PM HEAVY RAIN 6 ENE HACKENSACK 46.96N 94.41W
08/08/2015 M2.07 INCH CASS MN TRAINED SPOTTER
TOTAL FOR TODAY. 0.23 INCHES FELL THIS MORNING.
&&
KLHPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
205 PM CDT SAT AUG 08 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0202 PM HAIL 2 WSW LONGVILLE 46.98N 94.25W
08/08/2015 E0.25 INCH CASS MN TRAINED SPOTTER
&&
KLHSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 227 PM CDT SAT AUG 8 2015 MNZ025-035-082000- NORTH CASS-NORTHERN AITKIN- 227 PM CDT SAT AUG 8 2015 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL CASS AND NORTHWESTERN AITKIN COUNTIES... AT 226 PM CDT...A STRONG THUNDERSTORM WAS 8 MILES NORTH OF OUTING... OR 21 MILES SOUTHWEST OF SCHOOLCRAFT STATE PARK...MOVING EAST AT 30 MPH. WIND GUSTS UP TO 35 MPH...DIME SIZE HAIL...TORRENTIAL RAINFALL...AND FREQUENT CLOUD TO GROUND LIGHTNING CAN BE EXPECTED WITH THIS STORM. THIS STORM WILL BE NEAR... SWATARA AROUND 255 PM CDT. HILL CITY AROUND 300 PM CDT. OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE THUNDER LAKE... WASHBURN LAKE...LAURA LAKE...HAYPOINT...WHITE ELK LAKE...BAIN AND LAKE ROOSEVELT. SEEK SHELTER INSIDE A STURDY BUILDING AND AWAY FROM WINDOWS UNTIL THIS STORM PASSES. IF YOU ARE ON OR NEAR ONE OF THE MANY AREA LAKES...GET OFF OF THE WATER IMMEDIATELY AND SEEK SHELTER ON SHORE INSIDE A STURDY BUILDING. LAT...LON 4684 9410 4703 9409 4702 9356 4679 9357 TIME...MOT...LOC 1926Z 273DEG 26KT 4694 9399 MOORE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
308 PM CDT SAT AUG 08 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0250 PM HAIL 4 N DEER RIVER 47.39N 93.79W
08/08/2015 E0.25 INCH ITASCA MN TRAINED SPOTTER
SMALL BRANCHES DOWN.
&&
JJMSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 416 PM CDT SAT AUG 8 2015 MNZ035>037-082145- SOUTH AITKIN-CARLTON/SOUTH ST. LOUIS-NORTHERN AITKIN- 416 PM CDT SAT AUG 8 2015 ...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN ST. LOUIS...NORTHWESTERN CARLTON AND CENTRAL AITKIN COUNTIES... AT 416 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM NEAR BIG SANDY LAKE TO 6 MILES WEST OF MCGREGOR...AND MOVING EAST AT 20 MPH. WIND GUSTS UP TO 35 MPH...PENNY SIZE HAIL...AND FREQUENT CLOUD TO GROUND LIGHTNING CAN BE EXPECTED WITH THESE STORMS. THESE STORMS WILL BE NEAR... TAMARACK AROUND 430 PM CDT. MCGREGOR AROUND 435 PM CDT. CROMWELL AROUND 445 PM CDT. OTHER LOCATIONS IMPACTED BY THESE STORMS INCLUDE FLOWAGE LAKE... BALSAM...SHESHEBEE...KIMBERLY AND WRIGHT. SEEK SHELTER INSIDE A STURDY BUILDING AND AWAY FROM WINDOWS UNTIL THESE STORMS PASS. LAT...LON 4679 9280 4654 9297 4655 9365 4680 9326 TIME...MOT...LOC 2116Z 283DEG 18KT 4672 9320 4662 9344 MOORE
The Duluth radar (KDLH), 60 km away, was scanning. The volume nearest the first event began at 21:23 UTC.
1 thunderstorm wind. Local standard time, as filed.
An 800-pound hay bale was demolished by the strong winds. The winds also blew down 8 to 12 diameter trees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2015Every state in 2015This day in weather historyWarnings in Minnesota, August 2015
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: 598686.