Thunderstorm Wind, Cass
- When
- July 29, 2:05 AM CST
- Where
- Cass County, 4 mi E of Walker
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 47.100, -94.515
Several large trees were blown down.
Damaging Wind in Minnesota, July 29, 2008
A strong and fast moving cold front brought an organized line of strong thunderstorms across much of northeast Minnesota. At least one storm, near Walker, reached severe limits.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What happened
The episode as NWS DLH wrote it up.
A strong and fast moving cold front brought an organized line of strong thunderstorms across much of northeast Minnesota. At least one storm, near Walker, reached severe limits.
What forecasters said that day
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 Jul 29, 1:45 AM CST, 20 minutes earlier.
Area forecast discussion, Jul 29, 1:45 AM CST, 20 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 245 AM CDT TUE JUL 29 2008 .DISCUSSION... FNTL SYSTEM MOVG INTO WRN MN EARLY THIS MRNG APPEARS TO BE FULLY OCCLUDED...WITH THE LOW OVR LK WINNIPEG NEARLY VERT STACKED. TYPICALLY THIS SLOWS THE SYSTEM DOWN...BUT 75 KT 300 MB JET ALG SRN SIDE OF UPR LOW SHUD KEEP THINGS PROGRESSING EWD...AND THIS IS WHAT THE MODELS ARE DEPICTING. 25-35 KT LOLVL JET CROSSING THE WFNT HELPING TO KEEP CONVECTION GOING OVNGT. THIS ALONG WITH SFC DEWPTS IN THE 60S AND 850 MB LI/S ARND -4 SHUD KEEP CONVECTION GOING UNTIL FROPA. SEE SWODY 1 DISC FOR SVR POTENTIAL. MODELS IN GOOD AGMT ON FROPA AT DLH ARND THE NOON HOUR. PRECIP THEN DIMINISHES RAPIDLY AS DRY AIR AND HIGH PRESS PUSHES IN BEHIND THE CFNT. SOME LINGERING CONVECTION EXPECTED OVR FAR NRN ZONES NEAR SRN EDGE OF SLOWER MOVG UPR LOW. UPR RIDGE BRINGS A BRIEF DRY PD ON WED. HIGH INDEX ZONAL FLOW THEN SETS UP FOR THE REST OF THE WEEK WITH A SERIES OF EMBEDDED S/WVS. THERE IS SOME MODEL DISAGREEMENT ON STRENGTH AND TIMING...SO FOR NOW DID NOT MAKE ANY BIG CHGS TO EXTEND PD GRIDS. && .AVIATION... TSRA AND IFR CONDITIONS ASSOCIATED WITH A COLD FRONT WILL SPREAD EAST OVER NE MN THROUGH 12Z...REACHING LOCATIONS IN NW WI /INCLUDING KHYR/ AFT 14Z. VARIABLE SFC WIND GUSTS IN EXCESS OF 50KT AS WELL AS LARGE HAIL WILL BE POSSIBLE WITH SOME OF THESE STORMS. CIGS WILL IMPROVE FROM WEST TO EAST THROUGH THE DAY...WITH TSRA REDEVELOPMENT ALONG THE FRONT THIS AFTRN AND EVENING...MAINLY AFFECTING THE ERN HALF OF THE FA. THE FRONT WILL EXIT TO THE EAST THIS EVENING...RESULTING IN WDSPRD MVFR AFT 06Z WITH WRAP AROUND MID LVL CU IN THE NRN LOCATIONS. && POINT TEMPS/POPS... DLH 79 58 80 57 / 40 10 10 10 INL 79 55 81 56 / 30 10 10 10 BRD 84 57 85 59 / 30 10 10 10 HYR 83 55 83 58 / 50 10 10 10 ASX 79 56 80 57 / 50 10 10 10 && .DLH WATCHES/WARNINGS/ADVISORIES... MN...NONE. WI...NONE. LS...NONE. 04/GRANING
Hazardous weather outlook, Jul 28, 12:29 PM CST, 13 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE DULUTH MN 129 PM CDT MON JUL 28 2008 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-291030- 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- 129 PM CDT MON JUL 28 2008 ...SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT AND TUESDAY MORNING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA AND NORTHWEST WISCONSIN. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS ARE POSSIBLE TONIGHT OVER ALL OF THE NORTHLAND. ISOLATED STORMS COULD BECOME SEVERE LATE TONIGHT...MAINLY WEST OF A LINE FROM MANITOU RAPIDS MINNESOTA TO SIREN WISCONSIN. THE PRIMARY HAZARDS WILL BE LARGE HAIL AND DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON TUESDAY OVER MUCH OF NORTHEAST MINNESOTA AND NORTHWEST WISCONSIN. LARGE HAIL AND DAMAGING WINDS WILL AGAIN BE THE PRIMARY HAZARDS. THUNDERSTORMS ARE ALSO POSSIBLE THURSDAY AND THROUGH THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON OR TONIGHT. LSZ121-140>148-291030- 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- 129 PM CDT MON JUL 28 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF WESTERN LAKE SUPERIOR. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS ARE POSSIBLE LATE TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON TUESDAY OVER THE NEARSHORE WATERS OF WESTERN LAKE SUPERIOR. LARGE HAIL AND DAMAGING WINDS WILL AGAIN BE THE PRIMARY HAZARDS. THUNDERSTORMS ARE ALSO POSSIBLE THURSDAY AND THROUGH THE WEEKEND. GSF MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB ADDRESS: HTTP://WWW.WEATHER.GOV/DULUTH (ALL LOWER CASE)
The radar
The Duluth radar (KDLH), 177 km away, was scanning. The volume nearest the first event began at 08:03 UTC.
Event by event
1 thunderstorm wind. Local standard time, as filed.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flooding in Missouri, July 29 to 31, 2008
- Coastal Flood and High Surf in Alaska, July 29 to 31, 2008
- Damaging Winds in Minnesota, July 29, 2008
- Flash Flood and Hail in Mississippi, July 29, 2008
- Damaging Wind and Lightning Strike in South Carolina, July 29, 2008
- Flash Flood and Damaging Winds in Illinois, July 29, 2008
- Lightning Strike in Georgia, July 29, 2008
- Hail and Damaging Winds in Alabama, July 29, 2008
- Damaging Winds and Lightning Strike in Tennessee, July 29 to 30, 2008
- Damaging Winds in Missouri, July 29, 2008
- Flash Flooding and Hail in Missouri, July 29 to 30, 2008
- Tornadoes and Hail in Wisconsin, July 29, 2008
More
Every storm in Minnesota in 2008Every state in 2008This day in weather historyWarnings in Minnesota, July 2008
Sources
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: 128577.