Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 61, NWS Duluth, MN

May 30, 20114 counties in Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at May 30, 2011, 10:32 AM CDT for 4 counties in 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: May 30, 2011, 10:32 AM CDT (15:32 UTC)
Expired: May 30, 2011, 11:00 AM CDT
In force: 28 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 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 15:34 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 12:00Z, 3.5 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.

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: 25 J/kg
Mixed-layer CIN: -800 J/kg
Mixed-layer LCL: 588 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 326 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 May 30, 10:30 AM CDT, 2 minutes earlier.

Area forecast discussion, May 30, 10:30 AM CDT, 2 minutes before

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Hazardous weather outlook, May 30, 4:56 AM CDT, 5 hours 36 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE DULUTH MN
456 AM CDT MON MAY 30 2011

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-311000-
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-
456 AM CDT MON MAY 30 2011

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

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS WILL BE FOUND THIS MORNING...THEN REDEVELOP AGAIN
LATE THIS EVENING AND OVERNIGHT. SOME STORMS WILL HAVE THE
POTENTIAL TO BECOME SEVERE WITH HAIL AND DAMAGING WIND. A FEW
TORNADOES ARE ALSO POSSIBLE THIS EVENING...MAINLY OVER NORTH
CENTRAL MINNESOTA INCLUDING THE BRAINERD LAKES AREAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SHOWERS AND THUNDERSTORMS WILL LINGER THROUGH EARLY TUESDAY
ACROSS THE EASTERN SECTIONS OF THE NORTHLAND. SOME STORMS MAY BE
STRONG TO SEVERE.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS EVENING.

LSZ121-140>148-311000-
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-
456 AM CDT MON MAY 30 2011

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

.DAY ONE...TODAY AND TONIGHT

GUSTY NORTHEAST WINDS WILL GENERATE BUILDING WAVES TODAY. A SMALL
CRAFT ADVISORY IS IN EFFECT THROUGH THIS EVENING. PLEASE REFER TO
THE LATEST MARINE WEATHER MESSAGE FOR DETAILS.

SCATTERED THUNDERSTORMS WILL BE FOUND THIS MORNING...REDEVELOPING
OVERNIGHT. FOG WILL ALSO BE POSSIBLE THROUGH THE DAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SHOWERS AND THUNDERSTORMS WILL LINGER THROUGH TUESDAY MORNING. SOME
STORMS MAY BE STRONG TO SEVERE.

GRANING

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, May 30, 8:09 AM CDT, 2 hours 23 minutes before

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Special weather statement, May 30, 8:35 AM CDT, 1 hour 57 minutes before

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Special weather statement, May 30, 9:09 AM CDT, 1 hour 23 minutes before

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Local storm report, May 30, 9:41 AM CDT, 51 minutes before

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Special weather statement, May 30, 9:48 AM CDT, 44 minutes before

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Local storm report, May 30, 9:58 AM CDT, 34 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
May 30, 2:27 AM CDT	Special Weather Statement	DLH	Pine	33 min
May 30, 4:38 AM CDT	Special Weather Statement	DLH	Crow Wing	22 min
May 30, 5:04 AM CDT	Special Weather Statement	DLH	Aitkin, Cass, Crow Wing, Pine	26 min
May 30, 5:34 AM CDT	Special Weather Statement	DLH	Aitkin, Cass	26 min
May 30, 6:21 AM CDT	Special Weather Statement	DLH	Carlton	24 min
May 30, 7:04 AM CDT	Special Weather Statement	DLH	Saint Louis	41 min
May 30, 7:14 AM CDT	Special Weather Statement	DLH	Itasca	31 min
May 30, 8:09 AM CDT	Special Weather Statement	DLH	Pine	21 min
May 30, 8:35 AM CDT	Special Weather Statement	DLH	Pine	25 min
May 30, 9:43 AM CDT	Special Marine Warning	DLH		62 min
May 30, 2:35 AM CDT	Special Weather Statement	DLH	Sawyer, Washburn	25 min
May 30, 3:05 AM CDT	Special Weather Statement	DLH	Sawyer, Washburn	25 min
May 30, 3:32 AM CDT	Special Weather Statement	DLH	Price	28 min
May 30, 4:00 AM CDT	Special Weather Statement	DLH	Price	30 min
May 30, 4:31 AM CDT	Special Weather Statement	DLH	Price	14 min
May 30, 5:18 AM CDT	Special Weather Statement	DLH	Burnett	27 min
May 30, 5:47 AM CDT	Special Weather Statement	DLH	Iron	13 min
May 30, 5:54 AM CDT	Special Weather Statement	DLH	Sawyer, Washburn	36 min
May 30, 6:15 AM CDT	Special Weather Statement	DLH	Sawyer, Washburn	30 min
May 30, 6:35 AM CDT	Special Weather Statement	DLH	Ashland, Bayfield	40 min
May 30, 6:56 AM CDT	Special Weather Statement	DLH	Ashland, Iron	34 min
May 30, 7:48 AM CDT	Special Weather Statement	DLH	Iron	27 min
May 30, 8:06 AM CDT	Special Weather Statement	DLH	Washburn	24 min
May 30, 9:09 AM CDT	Special Weather Statement	DLH	Burnett, Washburn	21 min
May 30, 9:27 AM CDT	Severe Thunderstorm Warning	DLH	Burnett, Washburn	33 min
May 30, 9:48 AM CDT	Special Weather Statement	DLH	Ashland	12 min
May 30, 9:54 AM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield, Sawyer, Washburn	36 min
May 30, 11:08 AM CDT	Special Weather Statement	DLH	Iron	22 min
May 30, 11:45 AM CDT	Special Weather Statement	DLH	Washburn	15 min
May 30, 12:12 PM CDT	Special Weather Statement	DLH	Sawyer, Washburn	18 min
May 30, 12:29 PM CDT	Severe Thunderstorm Warning	DLH	Sawyer, Washburn	46 min
May 30, 1:22 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield, Sawyer	38 min
May 30, 1:48 PM CDT	Special Weather Statement	DLH	Washburn	12 min
May 30, 1:53 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield, Iron, Sawyer	37 min
May 30, 2:23 PM CDT	Areal Flood Advisory	DLH	Ashland, Bayfield, Iron	6 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 Every severe thunderstorm warning in 2011

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.