13 thunderstorm wind, as filed by the National Weather Service.
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 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 Sep 23, 9:40 AM CST, 3 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 1040 AM CDT THU SEP 23 2004 .DISCUSSION...15Z MSAS SFC PRESSURE PLOT PLACED A LOW CENTER IN EASTERN SD WITH A WARM FRONT EXTENDING NORTHEASTWARD INTO NW MN. THIS LEFT THE FA IN THE WARM SECTOR. A PARTLY CLOUDY SKY WAS FOUND OVER THE FA WITH SOME ACCAS SHOWING UP ON THE LATEST VISIBLE SATELLITE IMAGES. PESKY LOW CLOUDS AND FOG STILL PERSIST ALONG THE NORTH SHORE OF LAKE SUPERIOR TO THE HEAD OF THE LAKE. SUNSHINE AND WARMER AIR IS HELPING TO ERODE THE LOW CLOUDS AND FOG...BUT A PERSIST NE FLOW AT THE HEAD OF THE LAKE MAY LINGER THESE FEATURES A BIT LONGER. MAX TEMPS AT THE HEAD OF THE LAKE MAY HAVE A SLOWER RECOVERY...IF AT ALL. HAVE ISSUE AN UPDATED TO THE FORECAST TO ACCOUNT FOR THESE TRENDS. .DLH...WATCHES/WARNINGS/ADVISORIES MN...NONE. WI...NONE. GSF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 730 AM CDT THU SEP 23 2004 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-241230- ASHLAND-BAYFIELD-BURNETT-C. ST. LOUIS-CROW WING-DOUGLAS-IRON- KOOCHICHING-N. AITKIN-N. CASS-N. ITASCA-N. LAKE/N. COOK-N. ST. LOUIS- PINE-PRICE-S. AITKIN-S. CASS-S. COOK/LAKESHORE-S. ITASCA- S. LAKE/LAKESHORE-S. ST. LOUIS/CARLTON-SAWYER-WASHBURN- 730 AM CDT THU SEP 23 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN. .DAY ONE...TODAY AND TONIGHT SHOWERS AND FEW THUNDERSTORMS ARE EXPECTED ACROSS NORTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN THIS AFTERNOON INTO EARLY THIS EVENING. SOME OF THESE STORMS MAY PRODUCE SEVERE CONDITIONS...WITH DAMAGING WINDS THE MAIN THREAT. THE MOST PROBABLE LOCATION FOR SEVERE STORMS WILL BE ALONG A COLD FRONT THAT WILL STRETCH ACROSS NORTH-CENTRAL MINNESOTA DOWN INTO THE BRAINERD LAKES AREA. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. A FEW SHOWERS ARE EXPECTED FRIDAY AS THE SYSTEM DEPARTS. OTHERWISE DRY CONDITIONS ARE FORECASTED THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. && MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING URL: HTTP://WWW.CRH.NOAA.GOV/DLH KFM
The Duluth radar (KDLH), 163 km away, was scanning. The volume nearest the first event began at 18:40 UTC.
13 thunderstorm wind. Local standard time, as filed.
On Roy Lake, a sixty-foot reinforced TV antenna fell on a house. There was also severe damage to a dock and pontoon boat.
The strong winds lasted five minutes, uprooting 25 to 30 trees, including four 4-foot diameter oaks.
Numerous trees were blown down.
Numerous trees were blown down.
Numerous trees were blown down.
Numerous trees were blown down.
Numerous trees were blown down.
Numerous trees were blown down.
Power lines were blown down.
Trees and power lines were blown down.
Power lines were blown down.
Numerous trees were blown down.
Numerous trees were blown down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2004Every state in 2004This day in weather historyWarnings in Minnesota, September 2004
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: 5421086, 5421085, 5421074, 5421075, 5421076, 5421077, 5421078, 5421079, 5421080, 5421081, 5421082, 5421083, 5421084.