Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 172, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Aug 27, 2018, 7:12 PM CDT for 4 counties in Wisconsin. It was in force for 33 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 27, 2018, 7:12 PM CDT (00:12 UTC)
- Expired
- Aug 27, 2018, 7:45 PM CDT
- In force
- 33 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bayfield County, WI, Douglas County, WI, Sawyer County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 94 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 27, 7:28 PM CDT | TSTM WND DMG | 2 W Northwoods Beach, WI | FEW TREES KNOCKED DOWN IN BASS LAKE, WI. TIME ESTIMATED FROM RADAR. |
| Aug 27, 7:30 PM CDT | TSTM WND DMG | Hayward, WI | LARGE TREE FELL ON A HOUSE IN THE CITY OF HAYWARD. |
| Aug 27, 7:30 PM CDT | TSTM WND DMG | Hayward, WI | FEW TREES KNOCKED DOWN. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 16 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 27, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.2 hours before the alert went out and 207 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
- 750 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 879 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- -130 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- -0.2
- Supercell composite
- -2.6
The text
As transmitted.
380
WUUS53 KDLH 280012
SVRDLH
WIC007-031-113-129-280045-
/O.NEW.KDLH.SV.W.0172.180828T0012Z-180828T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Duluth MN
712 PM CDT MON AUG 27 2018
The National Weather Service in Duluth MN has issued a
* Severe Thunderstorm Warning for...
Southwestern Bayfield County in northwestern Wisconsin...
Southeastern Douglas County in northwestern Wisconsin...
Washburn County in northwestern Wisconsin...
Western Sawyer County in northwestern Wisconsin...
* Until 745 PM CDT
* At 710 PM CDT, severe thunderstorms were located along a line
extending from Poplar In Douglas County, to Minong, to 6 miles west
of Haugen, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near,
Lake Nebagamon around 720 PM CDT.
Brule around 725 PM CDT.
Hayward and Iron River around 735 PM CDT.
Birchwood and Little Round Lake around 740 PM CDT.
Round Lake, Cable, Seeley and Ino around 745 PM CDT.
Other locations impacted by these severe thunderstorms include
Reserve, Spooner Lake, Northwoods Beach, Chief Lake, Lac Courte
Oreilles Reservation, Edgewater, Totagatic Lake, Middle Eau Claire
Lake, Little Sissabagama Lake, and Grindstone Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle on flooded roadways.
&&
LAT...LON 4607 9190 4653 9185 4659 9114 4610 9121
4564 9133 4564 9201
TIME...MOT...LOC 0010Z 266DEG 33KT 4656 9176 4608 9179 4562 9191
HAIL...<.75IN
WIND...60MPH
$$
JTS1 follow-up statement
512
WWUS53 KDLH 280021
SVSDLH
Severe Weather Statement
National Weather Service Duluth MN
721 PM CDT MON AUG 27 2018
WIC007-031-113-129-280045-
/O.CON.KDLH.SV.W.0172.000000T0000Z-180828T0045Z/
Bayfield WI-Douglas WI-Washburn WI-Sawyer WI-
721 PM CDT MON AUG 27 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHWESTERN BAYFIELD...SOUTHEASTERN DOUGLAS...WASHBURN AND
WESTERN SAWYER COUNTIES...
At 721 PM CDT, severe thunderstorms were located along a line
extending from near Brule, to 6 miles east of Minong, to Haugen,
moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Brule around 725 PM CDT.
Hayward and Iron River around 735 PM CDT.
Birchwood around 740 PM CDT.
Round Lake, Cable, Seeley, Ino and Little Round Lake around 745 PM
CDT.
Other locations impacted by these severe thunderstorms include
Reserve, Spooner Lake, Northwoods Beach, Chief Lake, Lac Courte
Oreilles Reservation, Edgewater, Totagatic Lake, Middle Eau Claire
Lake, Little Sissabagama Lake, and Grindstone Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms and may lead to
flash flooding. Do not drive your vehicle through flood waters.
&&
LAT...LON 4605 9187 4653 9180 4659 9114 4610 9121
4564 9133 4565 9192
TIME...MOT...LOC 0021Z 265DEG 32KT 4657 9162 4608 9169 4563 9177
HAIL...<.75IN
WIND...60MPH
$$
JTSWhat 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 Aug 27, 6:47 PM CDT, 25 minutes earlier.
Area forecast discussion, Aug 27, 6:47 PM CDT, 25 minutes before
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</html>Hazardous weather outlook, Aug 27, 3:28 PM CDT, 3 hours 44 minutes before
Hazardous Weather Outlook National Weather Service Duluth MN 328 PM CDT Mon Aug 27 2018 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-281130- 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- 328 PM CDT Mon Aug 27 2018 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...This afternoon and Tonight Severe thunderstorms will occur over Pine and Carlton counties, as well as all of northwest Wisconsin tonight. Large hail, damaging winds and heavy rain are the hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms will be possible Thursday night through Saturday morning. .SPOTTER INFORMATION STATEMENT... Skywarn Spotters are needed until 10 pm in Pine and Carlton counties, as well as all of northwest Wisconsin tonight. LSZ121-140>148-281130- 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- 328 PM CDT Mon Aug 27 2018 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...This afternoon and Tonight Strong to severe thunderstorms will impact much of western Lake Superior this afternoon through this evening, especially at the head of the lake and along the South Shore, including the Apostle Islands National Lakeshore. The main threats will be strong winds, large hail, and frequent lightning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Increasing northeast winds will lead to building waves across much of western Lake Superior on Tuesday. GSF/JTS More information may be obtained at the following web address: http://www.weather.gov/duluth (all lower case)
In the hours before
Local storm report, Aug 27, 6:06 PM CDT, 1 hour 6 minutes before
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</html>Local storm report, Aug 27, 6:38 PM CDT, 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
638 PM CDT MON AUG 27 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0555 PM TSTM WND DMG 1 WNW HURLEY 46.45N 90.19W
08/27/2018 IRON WI 911 CALL CENTER
A FEW TREES KNOCKED DOWN INTO BUSINESS
PARKING LOTS ALONG 10TH AVENUE NORTH. TIME
ESTIMATED FROM RADAR.
&&
WLLocal storm report, Aug 27, 6:40 PM CDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
640 PM CDT MON AUG 27 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0550 PM TSTM WND DMG MONTREAL 46.43N 90.24W
08/27/2018 IRON WI 911 CALL CENTER
SEVERAL TREES KNOCKED DOWN ALONG HIGHWAY 77
IN MONTREAL. TIME ESTIMATED BY RADAR.
&&
WLThe office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 7:42 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer, Washburn | 48 min |
| Aug 27, 8:02 PM CDT | Areal Flood Advisory | DLH | Sawyer, Washburn | 118 min |
| Aug 27, 8:13 PM CDT | Areal Flood Advisory | DLH | Ashland, Bayfield, Douglas, Iron | 3 hr |
| Aug 27, 8:17 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron, Price, Sawyer | 43 min |
| Aug 27, 9:56 PM CDT | Areal Flood Advisory | DLH | Bayfield, Douglas | 8 hr |
| Aug 28, 9:39 AM CDT | Beach Hazards Statement | DLH | Douglas | 11 hr |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2018Every severe thunderstorm warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.