Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 166, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Sep 21, 2007, 6:56 AM CDT for Pine County, Minnesota. It was in force for 35 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, 6:56 AM CDT (11:56 UTC)
- Expired
- Sep 21, 2007, 7:31 AM CDT
- In force
- 35 min
- Issued by
- NWS Duluth, MN
- Area
- Counties, with a storm outline in the text
County Pine County, MN
The radar
The Duluth radar (KDLH), 89 km from the middle of the area, began a volume at 11:57 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 21, 6:04 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 11.9 hours before the alert went out and 156 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 21, 6:07 AM CDT, 49 minutes earlier.
Area forecast discussion, Sep 21, 6:07 AM CDT, 49 minutes before
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</html>Hazardous weather outlook, Sep 21, 4:36 AM CDT, 2 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 436 AM CDT FRI SEP 21 2007 LSZ121-140>148-162-MNZ010>012-018>021-025-026-033>038-WIZ001>004- 006>009-220945- 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- 436 AM CDT FRI SEP 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA... NORTHWEST WISCONSIN AND WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT A VERY ACTIVE WEATHER PATTERN WILL CREATE A VARIETY OF WEATHER ACROSS THE REGION TODAY AND THIS EVENING. THERE IS A RISK OF SEVERE THUNDERSTORMS TODAY ACROSS THE ENTIRE REGION. THE THREAT OF SEVERE THUNDERSTORMS WILL BE HIGHEST IN THE MORNING WEST OF A CRANE LAKE TO GRAND RAPIDS TO BRAINERD LINE. EAST OF THIS LINE...SEVERE THUNDERSTORMS ARE MORE LIKELY THIS AFTERNOON AS A LINE OF FAST MOVING THUNDERSTORMS DEVELOPS AHEAD OF A STRONG COLD FRONT. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN SEVERE WEATHER THREAT... ALTHOUGH AN ISOLATED TORNADO REMAINS POSSIBLE. BEHIND THE FRONT STRONG AND VERY GUSTY WINDS WILL DEVELOP. A WIND ADVISORY MAY BE ISSUED IF CONDITIONS WARRANT LATER THIS MORNING. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL OF NORTHEAST MINNESOTA AND DOUGLAS AND BURNETT COUNTIES IN NORTHWEST WISCONSIN. ALTHOUGH SIGNIFICANT RAIN DID NOT OCCUR IN MOST AREAS OVERNIGHT...ANOTHER ROUND OF THUNDERSTORMS WILL CROSS THE AREA TODAY. PLEASE MONITOR THE LATEST FORECAST FOR ADDITIONAL UPDATES REGARDING THE THREAT OF HEAVY RAIN AND POSSIBLE FLOODING. A GALE WARNING IS IN EFFECT FOR THE OPEN WATERS OF WESTERN LAKE SUPERIOR FROM THIS AFTERNOON UNTIL SATURDAY MORNING. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE NEARSHORE WATERS OF LAKE SUPERIOR FROM GRAND PORTAGE MINNESOTA TO SAXON HARBOR WISCONSIN THROUGH LATE THIS EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE NEEDED TODAY AND TONIGHT. CANNON
In the hours before
Local storm report, Sep 21, 6:25 AM CDT, 31 minutes before
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</html>Local storm report, Sep 21, 6:56 AM CDT, 0 minutes before
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</html>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, 1:50 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 68 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, 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.