Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 65, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jul 6, 2017, 7:17 PM CDT for Sawyer County, Washburn County, Wisconsin. It was in force for 28 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 6, 2017, 7:17 PM CDT (00:17 UTC)
- Expired
- Jul 6, 2017, 7:45 PM CDT
- In force
- 28 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.25 in
- Wind
- 70.0 mph
Counties Sawyer County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 120 km from the middle of the area, began a volume at 00:16 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 |
|---|---|---|---|
| Jul 6, 5:54 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.3 hours before the alert went out and 203 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
- 791 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 2054 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
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 6, 6:54 PM CDT, 23 minutes earlier.
Area forecast discussion, Jul 6, 6:54 PM CDT, 23 minutes before
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</html>Hazardous weather outlook, Jul 6, 3:04 PM CDT, 4 hours 13 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Duluth MN 304 PM CDT Thu Jul 6 2017 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-071030- Koochiching-North St. Louis-Northern Cook/Northern Lake- North Itasca-Central St. Louis-Southern Lake/North Shore- Southern Cook/North Shore-North Cass-South Itasca-South Cass- Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis- Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price- 304 PM CDT Thu Jul 6 2017 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...This afternoon and tonight Thunderstorms are likely this afternoon and tonight from northern Minnesota southeast across northern Wisconsin. Large hail, damaging wind gusts, and torrential rainfall are the main threats. Localized flooding is possible should storms move over the same location repeatedly tonight. There is a small risk of tornadoes, especially this afternoon and early this evening, before sunset. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Several rounds of thunderstorms are possible from Friday morning through Wednesday. Some of the storms may be strong, but it is too early to highlight any particular time range or area. .SPOTTER INFORMATION STATEMENT... SKYWARN Spotters will be needed this afternoon and this evening. LSZ121-140>148-071030- 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- 304 PM CDT Thu Jul 6 2017 This Hazardous Weather Outlook is for portions of the nearshore waters of western Lake Superior. .DAY ONE...This afternoon and tonight A few thunderstorms are possible across western Lake Superior this afternoon and this evening. Some of the storms may be strong or severe with large hail, dangerous wind gusts, and heavy rainfall which will reduce visibility. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Thunderstorms are possible across parts of western Lake Superior late Tuesday night into Wednesday. JJM/Huyck More information may be obtained at the following web address: http://www.weather.gov/duluth (all lower case)
In the hours before
Special weather statement, Jul 6, 5:39 PM CDT, 1 hour 38 minutes before
Special Weather Statement
National Weather Service Duluth MN
539 PM CDT THU JUL 6 2017
WIZ001-002-062300-
Douglas-Bayfield-
539 PM CDT THU JUL 6 2017
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN BAYFIELD AND EAST
CENTRAL DOUGLAS COUNTIES...
At 538 PM CDT, a strong thunderstorm was near Barnes, or 30 miles
southeast of Superior, moving southeast at 30 mph.
Wind gusts up to 40 mph, dime-size hail, and frequent cloud to ground
lightning can be expected with this storm.
This storm will be near...
Barnes around 550 PM CDT.
Other locations impacted by this storm include Middle Eau Claire Lake
and Upper Eau Claire Lake.
Seek shelter inside a sturdy building and away from windows until
this storm passes.
This storm may intensify, please monitor local media outlets for
additional information and possible warnings from the National
Weather Service.
LAT...LON 4644 9174 4653 9169 4658 9157 4643 9122
4623 9148
TIME...MOT...LOC 2238Z 310DEG 26KT 4647 9158
LELocal storm report, Jul 6, 6:39 PM CDT, 38 minutes before
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</html>Local storm report, Jul 6, 6:55 PM CDT, 22 minutes before
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</html>Local storm report, Jul 6, 6:56 PM CDT, 21 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 |
|---|---|---|---|---|
| Jul 7, 11:04 AM CDT | Special Weather Statement | DLH | Lake | 11 min |
| Jul 7, 11:18 AM CDT | Special Weather Statement | DLH | Lake | 27 min |
| Jul 7, 11:36 AM CDT | Special Weather Statement | DLH | 9 min | |
| Jul 7, 11:47 AM CDT | Special Weather Statement | DLH | 13 min | |
| Jul 7, 12:27 PM CDT | Special Weather Statement | DLH | Carlton | 18 min |
| Jul 6, 7:02 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer | 43 min |
| Jul 6, 7:41 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron, Price | 36 min |
| Jul 6, 7:47 PM CDT | Severe Thunderstorm Warning | DLH | Price, Sawyer | 28 min |
| Jul 6, 7:49 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer | 26 min |
| Jul 6, 8:03 PM CDT | Special Weather Statement | DLH | Washburn | 27 min |
| Jul 6, 8:20 PM CDT | Special Weather Statement | DLH | Price | 10 min |
| Jul 6, 8:28 PM CDT | Special Weather Statement | DLH | Washburn | 32 min |
| Jul 7, 11:59 AM CDT | Special Weather Statement | DLH | Douglas | 16 min |
| Jul 7, 12:15 PM CDT | Special Weather Statement | DLH | Douglas | 15 min |
| Jul 7, 12:39 PM CDT | Special Weather Statement | DLH | Douglas | 36 min |
| Jul 7, 1:15 PM CDT | Special Weather Statement | DLH | Douglas | 30 min |
| Jul 7, 1:49 PM CDT | Special Weather Statement | DLH | Sawyer, Washburn | 26 min |
| Jul 7, 2:19 PM CDT | Special Weather Statement | DLH | Sawyer, Washburn | 11 min |
| Jul 7, 2:32 PM CDT | Special Weather Statement | DLH | Price | 13 min |
| Jul 7, 3:13 PM CDT | Special Weather Statement | DLH | Price | 17 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2017Every severe thunderstorm warning in 2017
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.