Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 71, NWS Duluth, MN

June 7, 2007Bayfield County, Sawyer County, Washburn County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Jun 7, 2007, 6:55 PM CDT for Bayfield County, Sawyer County, Washburn County, Wisconsin. It was in force for 35 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: Jun 7, 2007, 6:55 PM CDT (23:55 UTC)
Expired: Jun 7, 2007, 7:30 PM CDT
In force: 35 min
Issued by: NWS Duluth, MN
Area: Counties, with a storm outline in the text

Counties Bayfield County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 101 km from the middle of the area, began a volume at 23:56 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
Jun 7, 11:34 AM CDT	Tornado Watch PDS	SPC	10 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.9 hours before the alert went out and 225 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: 72 J/kg
Mixed-layer CIN: -470 J/kg
Mixed-layer LCL: 1082 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Jun 7, 5:52 PM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, Jun 7, 5:52 PM CDT, 1 hour 3 minutes before

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Hazardous weather outlook, Jun 7, 7:46 AM CDT, 11 hours 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
746 AM CDT THU JUN 7 2007

LSZ121-140>148-162-MNZ010>012-018>021-025-026-033>038-WIZ001>004-
006>009-081030-
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-
OPEN WATERS OF LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI
TO GRAND PORTAGE MN-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-
746 AM CDT THU JUN 7 2007

...MODERATE TO HIGH RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
AND EVENING...

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

.DAY ONE...TODAY AND TONIGHT

A FEW THUNDERSTORMS WILL OCCUR THIS MORNING...AND AN ISOLATED
SEVERE STORM IS POSSIBLE WITH LARGE HAIL THE MAIN THREAT.

A SIGNIFICANT SEVERE WEATHER OUTBREAK IS EXPECTED THIS AFTERNOON AND
EVENING ACROSS THE NORTHLAND...ESPECIALLY FAR EASTERN MINNESOTA
AND NORTHWEST WISCONSIN. MUCH OF THE NORTHLAND IS IN A MODERATE
RISK OF SEVERE STORMS...WITH A HIGH RISK EAST AND SOUTH OF A LINE
FROM SIREN TO IRONWOOD. THE THREATS WILL BE LARGE HAIL...DAMAGING
WINDS...AND A FEW STRONG TORNADOES. THIS IS A DANGEROUS
SITUATION...AND WATCH FOR FUTURE FORECASTS...WATCHES AND WARNINGS
AS THE DAY PROGRESSES. THE STORMS WILL WEAKEN AND MOVE EAST OUT OF
THE AREA BY LATE EVENING.

STRONG SOUTH TO SOUTHWEST WINDS GUSTING TO 45 MPH WILL
DEVELOP TODAY...AND A WIND ADVISORY HAS BEEN ISSUED FOR NORTHWEST
WISCONSIN. SEE THE LATEST WEATHER MESSAGE FOR MORE INFORMATION.

A SMALL CRAFT ADVISORY HAS BEEN ISSUED FOR THE NEAR SHORE WATERS
FROM TWO HARBORS...TO DULUTH...TO PORT WING FOR THIS MORNING...AND
FOR THE REST OF THE SOUTH SHORE THROUGH FRIDAY MORNING. SEE THE
LATEST NEAR SHORE MARINE FORECAST FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THUNDERSTORMS WILL BE POSSIBLE FROM SATURDAY NIGHT THROUGH WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON INTO THE
EVENING.

MELDE

In the hours before

Local storm report, Jun 7, 3:09 PM CDT, 3 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
309 PM CDT THU JUN 07 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0250 PM     HAIL             FIFIELD                 45.88N 90.42W
06/07/2007  E0.75 INCH       PRICE              WI   LAW ENFORCEMENT

0250 PM     HEAVY RAIN       PARK FALLS              45.93N 90.45W
06/07/2007  M0.40 INCH       PRICE              WI   CO-OP OBSERVER

            .40 RAIN IN 10 MINUTES.

0250 PM     HAIL             MCGREGOR                46.61N 93.31W
06/07/2007  E0.88 INCH       AITKIN             MN   TRAINED SPOTTER

&&

SG

Local storm report, Jun 7, 3:41 PM CDT, 3 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
341 PM CDT THU JUN 07 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0250 PM     HAIL             CLOQUET                 46.73N 92.49W
06/07/2007  M0.75 INCH       CARLTON            MN   TRAINED SPOTTER

&&

SG

Local storm report, Jun 7, 5:49 PM CDT, 1 hour 6 minutes before

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Local storm report, Jun 7, 6:04 PM CDT, 51 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
Jun 7, 5:08 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	52 min
Jun 7, 5:52 AM CDT	Severe Thunderstorm Warning	DLH	Koochiching, Saint Louis	23 min
Jun 7, 6:13 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	32 min
Jun 7, 6:43 AM CDT	Severe Thunderstorm Warning	DLH	Cook, Lake	41 min
Jun 7, 12:31 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	44 min
Jun 7, 2:37 PM CDT	Special Marine Warning	DLH		41 min
Jun 7, 2:58 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	47 min
Jun 7, 3:05 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Saint Louis	25 min
Jun 7, 3:08 PM CDT	Severe Thunderstorm Warning	DLH	Lake	22 min
Jun 7, 3:21 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Saint Louis	24 min
Jun 7, 3:25 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Saint Louis	20 min
Jun 7, 3:42 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Lake, Saint Louis	33 min
Jun 7, 3:54 PM CDT	Tornado Warning	DLH	Itasca, Koochiching	36 min
Jun 7, 4:16 PM CDT	Severe Thunderstorm Warning	DLH	Lake	29 min
Jun 7, 4:31 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	29 min
Jun 7, 4:48 PM CDT	Special Marine Warning	DLH		57 min
Jun 7, 4:59 PM CDT	Severe Thunderstorm Warning	DLH	Cook, Lake	61 min
Jun 7, 5:02 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	28 min
Jun 7, 5:18 PM CDT	Special Marine Warning	DLH		27 min
Jun 7, 5:27 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	33 min
Jun 7, 5:34 PM CDT	Special Marine Warning	DLH		56 min
Jun 7, 5:47 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Itasca, Pine, Saint Louis	28 min
Jun 7, 5:55 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	35 min
Jun 7, 6:04 PM CDT	Severe Thunderstorm Warning	DLH	Cook, Lake, Saint Louis	56 min
Jun 7, 6:12 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Pine, Saint Louis	22 min
Jun 7, 6:28 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	35 min
Jun 7, 6:29 PM CDT	Special Marine Warning	DLH		61 min
Jun 7, 3:41 AM CDT	Wind Advisory	DLH	Ashland, Bayfield, Burnett, Douglas, Iron, Price and 2 more	10 hr
Jun 7, 1:52 PM CDT	Tornado Warning	DLH	Price, Sawyer	53 min
Jun 7, 2:36 PM CDT	Severe Thunderstorm Warning	DLH	Douglas	24 min
Jun 7, 2:40 PM CDT	Tornado Warning	DLH	Ashland, Iron, Price	49 min
Jun 7, 4:57 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield	48 min
Jun 7, 5:46 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield	16 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2007 Every severe thunderstorm warning in 2007

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.