Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 166, NWS Duluth, MN

July 15, 2008Itasca County, Saint Louis County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 15, 2008, 12:06 AM CDT for Itasca County, Saint Louis County, Minnesota. It was in force for 54 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: Jul 15, 2008, 12:06 AM CDT (05:06 UTC)
Expired: Jul 15, 2008, 1:00 AM CDT
In force: 54 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon

Counties Itasca County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 101 km from the middle of the area, began a volume at 05:08 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
Jul 14, 7:34 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 5.1 hours before the alert went out and 115 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: 481 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1737 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 265 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 9.4

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 Jul 14, 10:04 PM CDT, 2 hours 2 minutes earlier.

Area forecast discussion, Jul 14, 10:04 PM CDT, 2 hours 2 minutes before

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Hazardous weather outlook, Jul 14, 8:09 AM CDT, 15 hours 57 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
809 AM CDT MON JUL 14 2008

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-151030-
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-
809 AM CDT MON JUL 14 2008

...SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT...

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

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE POSSIBLE TODAY...MAINLY NORTH OF A LINE FROM
BRAINERD TO ASHLAND.

THUNDERSTORMS WILL BE POSSIBLE OVER MUCH OF THE NORTHLAND TONIGHT.

SOME OF THE STORMS MAY BE SEVERE THIS AFTERNOON INTO
TONIGHT...ESPECIALLY ALONG AND NORTH OF A TWIN PORTS TO CASS LAKE
LINE...WITH LARGE HAIL AND DAMAGING WINDS THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A FRONTAL BOUNDARY WILL REMAIN CLOSE ENOUGH TO THE NORTHLAND TO
KEEP THE THREAT OF THUNDERSTORMS IN THE FORECAST THROUGH THE REST OF
THE WEEK. ITS TOO EARLY TO DETERMINE IF THE STORMS WILL BE SEVERE.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

LSZ121-140>148-151030-
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-
809 AM CDT MON JUL 14 2008

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

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE POSSIBLE TODAY...MAINLY NORTH OF A LINE FROM
BRAINERD TO ASHLAND.

THUNDERSTORMS WILL BE POSSIBLE OVER MUCH OF THE NORTHLAND TONIGHT.

SOME OF THE STORMS MAY BE SEVERE THIS AFTERNOON INTO TONIGHT...ESPECIALLY
ALONG AND NORTH OF A TWIN PORTS TO CASS LAKE LINE...WITH LARGE
HAIL AND DAMAGING WINDS THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A FRONTAL BOUNDARY WILL REMAIN CLOSE ENOUGH TO THE NORTHLAND TO
KEEP THE THREAT OF THUNDERSTORMS IN THE FORECAST THROUGH THE REST OF
THE WEEK. ITS TOO EARLY TO DETERMINE IF THE STORMS WILL BE SEVERE.

EASTERLY WINDS WILL DEVELOP ON TUESDAY...AND THEY MAY BECOME STRONG
ENOUGH BY LATE AFTERNOON TO POSE A THREAT FOR RIP CURRENTS AT THE
BEACHES AROUND THE TWIN PORTS. ONSHORE WINDS WILL CONTINUE THROUGH
MUCH OF THE REST OF THE WEEK...AND THERE MAY BE TIMES WHEN WINDS
INCREASE ENOUGH AND CREATE RIP CURRENTS FROM THE TWIN PORTS...EAST
ALONG THE SOUTH SHORE OF LAKE SUPERIOR.

MELDE

In the hours before

Local storm report, Jul 14, 10:41 PM CDT, 1 hour 25 minutes before

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Local storm report, Jul 14, 10:59 PM CDT, 1 hour 7 minutes before

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Local storm report, Jul 14, 11:09 PM CDT, 57 minutes before

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Local storm report, Jul 14, 11:11 PM CDT, 55 minutes before

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Local storm report, Jul 14, 11:12 PM CDT, 54 minutes before

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Local storm report, Jul 14, 11:21 PM CDT, 45 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
Jul 14, 7:03 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching, Saint Louis	57 min
Jul 14, 7:16 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching	59 min
Jul 14, 7:18 PM CDT	Severe Thunderstorm Warning	DLH	Lake, Saint Louis	57 min
Jul 14, 7:48 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching, Saint Louis	57 min
Jul 14, 7:51 PM CDT	Severe Thunderstorm Warning	DLH	Cook	39 min
Jul 14, 7:53 PM CDT	Special Marine Warning	DLH		97 min
Jul 14, 8:11 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching	34 min
Jul 14, 8:13 PM CDT	Severe Thunderstorm Warning	DLH	Lake	47 min
Jul 14, 8:13 PM CDT	Severe Thunderstorm Warning	DLH	Itasca	62 min
Jul 14, 8:19 PM CDT	Severe Thunderstorm Warning	DLH	Cook	56 min
Jul 14, 8:48 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	57 min
Jul 14, 8:48 PM CDT	Tornado Warning	DLH	Cook, Lake	57 min
Jul 14, 8:52 PM CDT	Tornado Warning	DLH	Saint Louis	38 min
Jul 14, 9:01 PM CDT	Tornado Warning	DLH	Itasca, Saint Louis	44 min
Jul 14, 9:05 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching	55 min
Jul 14, 9:18 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	42 min
Jul 14, 9:22 PM CDT	Special Marine Warning	DLH		83 min
Jul 14, 9:26 PM CDT	Tornado Warning	DLH	Itasca, Koochiching	49 min
Jul 14, 9:30 PM CDT	Tornado Warning	DLH	Saint Louis	30 min
Jul 14, 9:47 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	58 min
Jul 14, 10:07 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca, Saint Louis	53 min
Jul 14, 10:26 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching, Saint Louis	64 min
Jul 14, 10:51 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching	54 min
Jul 14, 10:54 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	51 min
Jul 14, 10:56 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Itasca, Saint Louis	64 min
Jul 14, 11:03 PM CDT	Special Marine Warning	DLH		87 min
Jul 14, 11:19 PM CDT	Severe Thunderstorm Warning	DLH	Itasca	56 min
Jul 14, 11:35 PM CDT	Severe Thunderstorm Warning	DLH	Lake, Saint Louis	55 min
Jul 15, 2:39 AM CDT	Severe Thunderstorm Warning	DLH	Crow Wing	23 min
Jul 15, 2:41 AM CDT	Severe Thunderstorm Warning	DLH	Carlton, Pine	49 min
Jul 15, 3:09 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Pine	40 min
Jul 15, 5:34 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	41 min
Jul 15, 6:07 PM CDT	Tornado Warning	DLH	Koochiching, Saint Louis	23 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008 Every severe thunderstorm warning in 2008

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.