Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 159, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Sep 21, 2007, 1:50 AM CDT for Cass County, Crow Wing County, Minnesota. It was in force for 68 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
- Sep 21, 2007, 1:50 AM CDT (06:50 UTC)
- Expired
- Sep 21, 2007, 2:58 AM CDT
- In force
- 68 min
- Issued by
- NWS Duluth, MN
- Area
- Counties, with a storm outline in the text
Counties Cass County, MN, Crow Wing County, MN
The radar
The Duluth radar (KDLH), 152 km from the middle of the area, began a volume at 06:52 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 20, 11:13 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 6.8 hours before the alert went out and 213 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
- 1394 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 838 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 567 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 24.8
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 Sep 20, 11:26 PM CDT, 2 hours 24 minutes earlier.
Area forecast discussion, Sep 20, 11:26 PM CDT, 2 hours 24 minutes before
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</html>Hazardous weather outlook, Sep 20, 3:26 PM CDT, 10 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 326 PM CDT THU SEP 20 2007 LSZ121-140>148-162-MNZ010>012-018>021-025-026-033>038-WIZ001>004- 006>009-212030- 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- OPEN WATERS OF LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND PORTAGE MN-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- 326 PM CDT THU SEP 20 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA... NORTHWEST WISCONSIN AND WESTERN LAKE SUPERIOR. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT WEST OF A LINE FROM BAUDETTE...TO BIGFORK...GRAND RAPIDS...MOOSE LAKE...AND HINCKLEY. THE MAIN THREAT WILL BE DAMAGING WINDS AND HAIL. A WIND ADVISORY IS IN EFFECT THROUGH THIS EVENING FOR WINDS OF 25 TO 30 MPH...WITH GUSTS UP TO 45 MPH...FOR ITASCA...CASS...CROW WING...AND AITKIN COUNTIES. THIS ADVISORY INCLUDES CASS LAKE...PINE RIVER...GRAND RAPIDS...AITKIN...AND MILLE LACS. MINOR WIND DAMAGE AND POWER OUTAGES WILL BE POSSIBLE THROUGH THIS EVENING. A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF NORTHEAST MINNESOTA AND DOUGLAS AND BURNETT COUNTIES IN NORTHWEST WISCONSIN. SHOWERS AND THUNDERSTORMS...INCLUDING PERIODS OF HEAVY RAIN...WILL PERSIST OVERNIGHT ACROSS MUCH OF THE REGION. THE THREAT FOR HEAVY RAIN WILL SHIFT EAST OVER THE NORTHWEST WISCONSIN AREAS AFTER MIDNIGHT. PLEASE MONITOR THE LATEST FORECAST FOR ADDITIONAL UPDATES REGARDING THE THREAT OF HEAVY RAIN AND POSSIBLE FLOODING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A STRONG COLD FRONT WILL RACE ACROSS THE REGION FRIDAY WITH THUNDERSTORMS LIKELY. HEAVY RAIN...DAMAGING WIND...AND HAIL ARE POSSIBLE WITH THESE STORMS. AT THIS TIME...IT APPEARS THE MOST LIKELY AREA FOR SEVERE THUNDERSTORMS WILL BE FROM THE TWIN PORTS EAST INTO NORTHWEST WISCONSIN. THE FLASH FLOOD WATCH CONTINUES INTO FRIDAY AFTERNOON FOR NORTHEAST MINNESOTA AND A PORTION OF NORTHWEST WISCONSIN. HEAVY RAIN WILL AGAIN BE POSSIBLE ACCOMPANYING THE COLD FRONT ON FRIDAY. THE LONG DURATION OF RAIN MAY CAUSE LOCALIZED FLOODING IN THE ALREADY SATURATED AREAS. PLEASE MONITOR THE LATEST FORECAST FOR ADDITIONAL UPDATES REGARDING THE THREAT OF HEAVY RAIN AND POSSIBLE FLOODING. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING AND OVERNIGHT. GRANING
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 9:21 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 19 min |
| Sep 20, 11:56 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Itasca, Saint Louis | 38 min |
| Sep 21, 1:26 AM CDT | Special Marine Warning | DLH | 64 min | |
| Sep 21, 5:00 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca | 20 min |
| Sep 21, 5:35 AM CDT | Special Marine Warning | DLH | 55 min | |
| Sep 21, 6:28 AM CDT | Special Marine Warning | DLH | 19 min | |
| Sep 21, 6:33 AM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 29 min |
| Sep 21, 6:48 AM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 42 min |
| Sep 21, 6:56 AM CDT | Severe Thunderstorm Warning | DLH | Pine | 35 min |
| Sep 21, 7:22 AM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 23 min |
| Sep 21, 7:28 AM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 17 min |
| Sep 21, 7:29 AM CDT | Special Marine Warning | DLH | 31 min | |
| Sep 21, 7:41 AM CDT | Special Marine Warning | DLH | 19 min | |
| Sep 21, 7:43 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 13 min |
| Sep 21, 7:43 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 13 min |
| Sep 21, 7:50 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 7 min |
| Sep 21, 7:59 AM CDT | Severe Thunderstorm Warning | DLH | Lake | 26 min |
| Sep 21, 8:05 AM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 40 min |
| Sep 21, 8:20 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin | 25 min |
| Sep 21, 8:39 AM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 32 min |
| Sep 21, 8:54 AM CDT | Special Marine Warning | DLH | 34 min | |
| Sep 21, 9:23 AM CDT | Severe Thunderstorm Warning | DLH | Koochiching, Saint Louis | 31 min |
| Sep 21, 3:29 PM CDT | Special Marine Warning | DLH | 31 min | |
| Sep 21, 3:43 PM CDT | Special Marine Warning | DLH | 47 min | |
| Sep 21, 3:56 PM CDT | Special Marine Warning | DLH | 64 min | |
| Sep 21, 4:30 PM CDT | Special Marine Warning | DLH | 45 min | |
| Sep 21, 4:56 PM CDT | Special Marine Warning | DLH | 19 min | |
| Sep 20, 9:58 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 33 min |
| Sep 21, 1:25 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 20 min |
| Sep 21, 5:35 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 40 min |
| Sep 21, 6:09 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 36 min |
| Sep 21, 6:41 AM CDT | Severe Thunderstorm Warning | DLH | Burnett, Washburn | 49 min |
| Sep 21, 7:04 AM CDT | Severe Thunderstorm Warning | DLH | Douglas | 30 min |
| Sep 21, 7:23 AM CDT | Severe Thunderstorm Warning | DLH | Iron | 21 min |
| Sep 21, 7:37 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 38 min |
| Sep 21, 4:08 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 52 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2007Every severe thunderstorm warning in 2007
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.