Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 151, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Aug 8, 2018, 7:27 PM CDT for 4 counties in Wisconsin. It was in force for 33 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
- Aug 8, 2018, 7:27 PM CDT (00:27 UTC)
- Expired
- Aug 8, 2018, 8:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 70.0 mph
Counties Ashland County, WI, Bayfield County, WI, Iron County, WI, Sawyer County, WI
The radar
The Duluth radar (KDLH), 119 km from the middle of the area, began a volume at 00:27 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.5 hours before the alert went out and 296 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
- 395 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1508 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 Aug 8, 6:40 PM CDT, 47 minutes earlier.
Area forecast discussion, Aug 8, 6:40 PM CDT, 47 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Aug 8, 2:44 PM CDT, 4 hours 43 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Duluth MN 244 PM CDT Wed Aug 8 2018 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-091200- 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- 244 PM CDT Wed Aug 8 2018 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...This afternoon and Tonight Isolated to scattered thunderstorms will develop along a cold front late this afternoon and this evening as the front moves south through the Minnesota Arrowhead and Iron Range into western Lake Superior and northern Wisconsin. Some storms could be strong with small hail and strong wind gusts of up to 40 mph. Smoke from far away wildfires will significantly affect air quality across portions of north-central Minnesota through Thursday morning. An Air Quality Alert is in effect, and was issued in coordination with the Minnesota Pollution Control Agency. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There is a low chance of thunderstorms along the higher terrain of the Minnesota North Shore Thursday afternoon where a lake breeze will set up. There is another opportunity for thunderstorms Monday night into Tuesday. .SPOTTER INFORMATION STATEMENT... Skywarn Spotters are encouraged to report any hail and gusty winds with potential thunderstorms late this afternoon and this evening. LSZ121-140>148-091200- 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- 244 PM CDT Wed Aug 8 2018 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...This afternoon and Tonight Isolated to scattered thunderstorms will develop along a cold front late this afternoon and this evening as the front moves south through the Minnesota Arrowhead and Iron Range into western Lake Superior and northern Wisconsin. Some storms could be strong with small hail and strong wind gusts of up to 40 mph. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There is a small chance of thunderstorms from Monday afternoon into Monday night. G2/Huyck/KC 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, Aug 8, 6:12 PM CDT, 1 hour 15 minutes before
Special Weather Statement
National Weather Service Duluth MN
612 PM CDT WED AUG 8 2018
WIZ001-002-090000-
Douglas-Bayfield-
612 PM CDT WED AUG 8 2018
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT BAYFIELD AND
NORTHEASTERN DOUGLAS COUNTIES...
At 611 PM CDT, strong thunderstorms were along a line extending from
near Bayfield Peninsula Sea Caves, to near Wisconsin Point, and
moving southeast at 30 mph.
Wind gusts up to 40 mph, half-inch hail, heavy downpours, and
occasional cloud to ground lightning can be expected with these
storms.
These storms will be near...
Bayfield Peninsula Sea Caves, Sand Island and Cornucopia around
615 PM CDT.
Sand Bay around 625 PM CDT.
Bayfield and Red Cliff around 635 PM CDT.
Lake Nebagamon, Oulu and Madeline Island around 645 PM CDT.
Brule around 650 PM CDT.
Iron River and Barnes around 700 PM CDT.
Other locations impacted by these storms include Cloverland,
Wentworth, Amnicon Falls State Park, Blueberry, Waino, Mouth Of
Brule, Moquah, Red Cliff Reservation, Apostle Islands National Lake
Shore, and Bad River Reservation.
Seek shelter inside a sturdy building and away from windows until
these storms pass. Get off area lakes and seek shelter on shore in a
sturdy shelter or a hard-topped vehicle.
LAT...LON 4673 9072 4663 9056 4662 9062 4667 9075
4658 9093 4653 9093 4636 9151 4670 9207
4673 9180 4683 9140 4692 9121 4692 9109
4701 9101 4687 9063 4678 9079 4675 9079
4679 9066 4681 9069 4684 9062 4683 9053
TIME...MOT...LOC 2311Z 304DEG 28KT 4695 9103 4670 9190
JTSSpecial weather statement, Aug 8, 6:19 PM CDT, 1 hour 8 minutes before
Special Weather Statement National Weather Service Duluth MN 619 PM CDT WED AUG 8 2018 MNZ037-WIZ001-082345- Carlton/South St. Louis-Douglas- 619 PM CDT WED AUG 8 2018 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN ST. LOUIS... NORTHEASTERN CARLTON AND NORTHWESTERN DOUGLAS COUNTIES... At 619 PM CDT, a strong thunderstorm was near Proctor, or 8 miles east of Cloquet, moving southeast at 25 mph. Wind gusts up to 40 mph and half-inch hail can be expected with this storm. This storm will be near... Proctor around 625 PM CDT. Superior and Oliver around 640 PM CDT. Wisconsin Point and South Range around 645 PM CDT. Other locations impacted by this storm include Cody, Park Point, Billings Park, Gary New Duluth, Munger, Morgan Park, Spirit Valley, Fond Du Lac, Jay Cooke State Park, and Norton Park. Seek shelter inside a sturdy building and away from windows until this storm passes. Get off area lakes and seek shelter on shore in a sturdy shelter or a hard-topped vehicle. This storm may intensify, please monitor local media outlets for additional information and possible warnings from the National Weather Service. LAT...LON 4668 9247 4683 9233 4669 9188 4646 9209 TIME...MOT...LOC 2319Z 302DEG 20KT 4672 9231 JTS
Local storm report, Aug 8, 6:26 PM CDT, 1 hour 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
626 PM CDT WED AUG 8 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0624 PM HEAVY RAIN 1 NW TWO HARBORS 47.04N 91.69W
08/08/2018 M2.25 INCH LAKE MN TRAINED SPOTTER
&&
WLSpecial weather statement, Aug 8, 6:35 PM CDT, 52 minutes before
Special Weather Statement
National Weather Service Duluth MN
635 PM CDT WED AUG 8 2018
WIZ001-002-090000-
Douglas-Bayfield-
635 PM CDT WED AUG 8 2018
...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL BAYFIELD AND
NORTHEASTERN DOUGLAS COUNTIES...
At 635 PM CDT, a strong thunderstorm was 8 miles northwest of Oulu,
or 20 miles east of Superior, moving southeast at 40 mph.
Wind gusts up to 40 mph, penny-size hail, heavy downpours, and
occasional cloud to ground lightning can be expected with this storm.
This storm will be near...
Maple around 645 PM CDT.
Oulu around 650 PM CDT.
Brule around 655 PM CDT.
Iron River and Barnes around 700 PM CDT.
Other locations impacted by this storm include Mouth Of Brule,
Cloverland, Blueberry, and Waino.
Seek shelter inside a sturdy building and away from windows until
this storm passes. Get off area lakes and seek shelter on shore in a
sturdy shelter or a hard-topped vehicle.
This storm may intensify, please monitor local media outlets for
additional information and possible warnings from the National
Weather Service.
LAT...LON 4634 9146 4670 9184 4674 9177 4679 9159
4652 9116
TIME...MOT...LOC 2335Z 318DEG 33KT 4671 9167
JTSSpecial weather statement, Aug 8, 6:46 PM CDT, 41 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Aug 8, 6:51 PM CDT, 36 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:24 PM CDT | Special Weather Statement | DLH | Cook | 51 min |
| Aug 8, 7:04 PM CDT | Special Weather Statement | DLH | Ashland, Iron | 41 min |
| Aug 8, 7:12 PM CDT | Special Weather Statement | DLH | Douglas | 18 min |
| Aug 8, 7:44 PM CDT | Special Weather Statement | DLH | Douglas | 16 min |
| Aug 8, 7:47 PM CDT | Special Weather Statement | DLH | Douglas | 13 min |
| Aug 8, 7:58 PM CDT | Special Weather Statement | DLH | Washburn | 32 min |
| Aug 8, 8:04 PM CDT | Special Weather Statement | DLH | Washburn | 26 min |
| Aug 8, 8:07 PM CDT | Special Weather Statement | DLH | Sawyer | 38 min |
| Aug 8, 8:27 PM CDT | Special Weather Statement | DLH | Washburn | 33 min |
| Aug 8, 8:29 PM CDT | Special Weather Statement | DLH | Sawyer | 31 min |
| Aug 8, 8:55 PM CDT | Special Weather Statement | DLH | Price | 35 min |
| Aug 8, 9:19 PM CDT | Special Weather Statement | DLH | Price | 26 min |
| Aug 8, 9:26 PM CDT | Special Weather Statement | DLH | Price | 34 min |
| Aug 8, 10:01 PM CDT | Special Weather Statement | DLH | Price | 14 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.