Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 67, NWS Duluth, MN

August 2, 2015Sawyer County, Washburn County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Aug 2, 2015, 7:03 AM CDT for Sawyer County, Washburn County, Wisconsin. It was in force for 15 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 2, 2015, 7:03 AM CDT (12:03 UTC)
Expired: Aug 2, 2015, 7:18 AM CDT
In force: 15 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 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 12:05 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

Minneapolis, MN (KMPX), launched 12:00Z, 0.1 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 938 J/kg
Mixed-layer CIN: -373 J/kg
Mixed-layer LCL: 1406 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 2, 6:32 AM CDT, 31 minutes earlier.

Area forecast discussion, Aug 2, 6:32 AM CDT, 31 minutes before

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Hazardous weather outlook, Aug 2, 3:58 AM CDT, 3 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
358 AM CDT SUN AUG 2 2015

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-031130-
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-
358 AM CDT SUN AUG 2 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MINNESOTA AND NORTHWEST WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE OF SEVERE THUNDERSTORMS TODAY ACROSS PORTIONS OF
THE NORTHLAND. A FEW STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE
IN NORTHEASTERN MINNESOTA THIS MORNING...WITH THE FOCUS SHIFTING
TO EAST CENTRAL MINNESOTA AND NORTHWESTERN WISCONSIN BY THIS
AFTERNOON AND EARLY EVENING. LARGE HAIL AND DAMAGING WINDS ARE
POSSIBLE WITH SOME OF THE STORMS. THE BEST CHANCE FOR SEEING
SEVERE STORMS WILL BE ACROSS NORTHWEST WISCONSIN THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THERE IS A CHANCE FOR THUNDERSTORMS FROM LATE WEDNESDAY
THROUGH THE WEEKEND ACROSS THE NORTHLAND. SEVERE WEATHER IS NOT
EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTERS MAY BE NEEDED TODAY...ESPECIALLY FOR AREAS OF
NORTHERN WISCONSIN THIS AFTERNOON.

LSZ121-140>148-031130-
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-
358 AM CDT SUN AUG 2 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NEARSHORE
WATERS OF WESTERN LAKE SUPERIOR.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE OF STRONG TO LOCALLY SEVERE THUNDERSTORMS
ACROSS WESTERN LAKE SUPERIOR TODAY. THE FOCUS WILL BE ON THE NORTH
SHORE THIS MORNING...AND THEN SHIFT TO THE SOUTH SHORE THIS
AFTERNOON. LARGE HAIL AND HIGH WINDS WILL BE THE MAIN THREAT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THERE IS A CHANCE FOR THUNDERSTORMS FROM LATE WEDNESDAY
THROUGH THE WEEKEND ACROSS THE NORTHLAND. SEVERE WEATHER IS NOT
EXPECTED AT THIS TIME.

DAP

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 2, 6:20 AM CDT, 43 minutes before

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Special weather statement, Aug 2, 6:30 AM CDT, 33 minutes before

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Special weather statement, Aug 2, 6:41 AM CDT, 22 minutes before

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Local storm report, Aug 2, 6:45 AM CDT, 18 minutes before

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Local storm report, Aug 2, 6:54 AM CDT, 9 minutes before

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Special weather statement, Aug 2, 6:58 AM CDT, 5 minutes before

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The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 2, 12:24 AM CDT	Special Weather Statement	DLH	Koochiching	21 min
Aug 2, 12:51 AM CDT	Special Weather Statement	DLH	Koochiching	24 min
Aug 2, 1:14 AM CDT	Special Weather Statement	DLH	Koochiching	16 min
Aug 2, 1:33 AM CDT	Special Weather Statement	DLH	Koochiching	12 min
Aug 2, 1:46 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	29 min
Aug 2, 1:49 AM CDT	Special Weather Statement	DLH	Koochiching	11 min
Aug 2, 2:01 AM CDT	Special Weather Statement	DLH		14 min
Aug 2, 2:17 AM CDT	Special Weather Statement	DLH	Saint Louis	28 min
Aug 2, 2:21 AM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	24 min
Aug 2, 2:27 AM CDT	Severe Thunderstorm Warning	DLH	Lake, Saint Louis	33 min
Aug 2, 2:45 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	30 min
Aug 2, 3:00 AM CDT	Special Weather Statement	DLH	Cook	30 min
Aug 2, 3:02 AM CDT	Special Weather Statement	DLH	Lake	13 min
Aug 2, 3:17 AM CDT	Special Weather Statement	DLH	Lake	13 min
Aug 2, 3:31 AM CDT	Special Weather Statement	DLH	Cook	29 min
Aug 2, 3:35 AM CDT	Special Marine Warning	DLH		40 min
Aug 2, 4:01 AM CDT	Special Weather Statement	DLH	Pine	29 min
Aug 2, 4:03 AM CDT	Special Weather Statement	DLH	Aitkin	27 min
Aug 2, 4:16 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Pine	29 min
Aug 2, 4:46 AM CDT	Severe Thunderstorm Warning	DLH	Pine	44 min
Aug 2, 12:17 AM CDT	Special Weather Statement	DLH	Sawyer	13 min
Aug 2, 12:29 AM CDT	Special Weather Statement	DLH	Sawyer	16 min
Aug 2, 12:45 AM CDT	Special Weather Statement	DLH	Sawyer	15 min
Aug 2, 5:09 AM CDT	Special Weather Statement	DLH	Washburn	36 min
Aug 2, 5:23 AM CDT	Severe Thunderstorm Warning	DLH	Burnett, Sawyer, Washburn	49 min
Aug 2, 6:09 AM CDT	Special Weather Statement	DLH	Price	36 min
Aug 2, 6:20 AM CDT	Special Weather Statement	DLH	Sawyer	25 min
Aug 2, 6:30 AM CDT	Special Weather Statement	DLH	Washburn	45 min
Aug 2, 6:41 AM CDT	Special Weather Statement	DLH	Price	34 min
Aug 2, 6:46 AM CDT	Severe Thunderstorm Warning	DLH	Sawyer, Washburn	29 min
Aug 2, 6:58 AM CDT	Special Weather Statement	DLH	Price	32 min
Aug 2, 7:07 AM CDT	Severe Thunderstorm Warning	DLH	Ashland, Iron, Price	23 min
Aug 2, 8:05 AM CDT	Special Weather Statement	DLH	Douglas	25 min
Aug 2, 8:17 AM CDT	Severe Thunderstorm Warning	DLH	Douglas, Washburn	28 min
Aug 2, 8:38 AM CDT	Severe Thunderstorm Warning	DLH	Bayfield, Douglas, Sawyer, Washburn	37 min
Aug 2, 9:03 AM CDT	Severe Thunderstorm Warning	DLH	Ashland, Price, Sawyer	42 min
Aug 2, 9:31 AM CDT	Special Weather Statement	DLH	Price	14 min
Aug 2, 9:42 AM CDT	Severe Thunderstorm Warning	DLH	Price, Sawyer	48 min
Aug 2, 9:50 AM CDT	Severe Thunderstorm Warning	DLH	Price	10 min
Aug 2, 10:03 AM CDT	Special Weather Statement	DLH	Ashland	27 min
Aug 2, 10:14 AM CDT	Special Weather Statement	DLH	Sawyer, Washburn	31 min
Aug 2, 10:37 AM CDT	Special Weather Statement	DLH	Sawyer	23 min
Aug 2, 10:55 AM CDT	Special Weather Statement	DLH	Sawyer	35 min
Aug 2, 11:31 AM CDT	Special Weather Statement	DLH	Price	14 min
Aug 2, 11:34 AM CDT	Severe Thunderstorm Warning	DLH	Price	26 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2015 Every severe thunderstorm warning in 2015

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.