Alert archive / Minnesota / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 57, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jul 10, 2004, 9:49 PM CDT for Saint Louis County, Minnesota. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 10, 2004, 9:49 PM CDT (02:49 UTC)
- Expired
- Jul 10, 2004, 10:45 PM CDT
- In force
- 56 min
- Issued by
- NWS Duluth, MN
- Area
- Counties, with a storm outline in the text
County Saint Louis County, MN
The radar
The Duluth radar (KDLH), 86 km from the middle of the area, began a volume at 02:48 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 2.8 hours before the alert went out and 126 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 767 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1189 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.3
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jul 10, 8:10 PM CDT, 1 hour 39 minutes earlier.
Area forecast discussion, Jul 10, 8:10 PM CDT, 1 hour 39 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 810 PM CDT SAT JUL 10 2004 .DISCUSSION...MAIN FOCUS IS THUNDERSTORMS AND HEAVY RAIN THIS EVENING. AREA OF STORMS GENERATING IN THE HIGH DEW POINTS OVER KOOCHICHING COUNTY IS WORKING VERY SLOWLY SOUTH. PRECIP FROM THIS STORMS HAS BEEN ABOUT ONE TO TWO INCHES AN HOUR BEFORE TAPERING BACK. THE FLASH FLOOD GUIDANCE IS ABOUT 3.2 IN PER HOUR, AND IT APPEARS WE ARE NOT EXCEEDING THAT ATTM. THE THREE HOUR VALUE IS 3.7 INCHES. WE ARE MENTIONING PERIODS OF HEAVY RAIN IN THE NW CORNER OF OUR MN CWA AND SUPPLEMENTING NOWS WITH HOURLY UPDATES ON RAINFALL ESTIMATES. THERE WILL BE A BREAK IN THE ACTION UNTIL THE NEXT UPSTREAM SHORTWAVE WORKS ITS WAY INTO THIS SAME AREA. .DLH...WATCHES/WARNINGS/ADVISORIES MN...NONE. WI...NONE. CS
Hazardous weather outlook, Jul 10, 12:30 PM CDT, 9 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE DULUTH MN 1230 PM CDT SAT JUL 10 2004 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-111230- 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- 1230 PM CDT SAT JUL 10 2004 ...SLIGHT RISK OF SEVERE THUNDERSTORMS FOR A PORTION OF NORTHEASTERN MINNESOTA LATE TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON IN NORTHEAST MINNESOTA. SEVERE THUNDERSTORMS ARE POSSIBLE LATE TONIGHT OVER NORTHEASTERN MINNESOTA...MAINLY WEST OF A LINE FROM CRANE LAKE...TO HIBBING...TO AITKIN. THE PRIMARY HAZARDS WILL BE LARGE HAIL AND DAMAGING WIND GUSTS. THUNDERSTORMS ARE EXPECTED ELSEWHERE IN NORTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN TONIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL ON SUNDAY. THE SEVERE THREAT AREA IS LEFT OF A LINE FROM BIG FALLS TO KNIFE RIVER IN NORTHEAST MINNESOTA...AND PORT WING TO THE CHEQUAMEGON NATIONAL FOREST. THUNDERSTORMS ARE POSSIBLE AGAIN ON MONDAY AFTERNOON THROUGH TUESDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTERS MAY BE ACTIVATED LATE TONIGHT IN NORTHEAST MINNESOTA AND ON SUNDAY IN NORTHEAST MINNESOTA AND NORTHWEST WISCONSIN. && MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING URL: HTTP://WWW.CRH.NOAA.GOV/DLH CLC/GSF
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 8:51 PM CDT | Flash Flood Warning | DLH | Koochiching, Saint Louis | 3 hr |
| Jul 11, 2:26 AM CDT | Flash Flood Warning | DLH | Itasca | 109 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2004Every severe thunderstorm warning in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.